./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0214_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/test-0214_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 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 05:37:53,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 05:37:53,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 05:37:53,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 05:37:53,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 05:37:53,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 05:37:53,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 05:37:53,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 05:37:53,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 05:37:53,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 05:37:53,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 05:37:53,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 05:37:53,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 05:37:53,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 05:37:53,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 05:37:53,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 05:37:53,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 05:37:53,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 05:37:53,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 05:37:53,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 05:37:53,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 05:37:53,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 05:37:53,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 05:37:53,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 05:37:53,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 05:37:53,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 05:37:53,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 05:37:53,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 05:37:53,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 05:37:53,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 05:37:53,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 05:37:53,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 05:37:53,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 05:37:53,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 05:37:53,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 05:37:53,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 05:37:53,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 05:37:53,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 05:37:53,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 05:37:53,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 05:37:53,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 05:37:53,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 05:37:53,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 05:37:53,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 05:37:53,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 05:37:53,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 05:37:53,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 05:37:53,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 05:37:53,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 05:37:53,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 05:37:53,826 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 05:37:53,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 05:37:53,827 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 05:37:53,827 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 05:37:53,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 05:37:53,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 05:37:53,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 05:37:53,828 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 05:37:53,828 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 05:37:53,828 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 05:37:53,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 05:37:53,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 05:37:53,829 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 05:37:53,829 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 05:37:53,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 05:37:53,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 05:37:53,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 05:37:53,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:37:53,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 05:37:53,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 05:37:53,830 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 05:37:53,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 05:37:53,831 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 05:37:53,831 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 05:37:53,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 05:37:53,831 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 05:37:53,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2023-02-18 05:37:54,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 05:37:54,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 05:37:54,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 05:37:54,117 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 05:37:54,117 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 05:37:54,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-02-18 05:37:55,241 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 05:37:55,527 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 05:37:55,527 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2023-02-18 05:37:55,549 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be7f1c1d/136f78b8747a437e9b03e9bb77619e78/FLAGe301619b1 [2023-02-18 05:37:55,561 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be7f1c1d/136f78b8747a437e9b03e9bb77619e78 [2023-02-18 05:37:55,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 05:37:55,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 05:37:55,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 05:37:55,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 05:37:55,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 05:37:55,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:37:55" (1/1) ... [2023-02-18 05:37:55,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4e922c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:55, skipping insertion in model container [2023-02-18 05:37:55,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:37:55" (1/1) ... [2023-02-18 05:37:55,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 05:37:55,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 05:37:55,868 WARN L623 FunctionHandler]: Unknown extern function abort [2023-02-18 05:37:55,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:37:55,916 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 05:37:55,971 WARN L623 FunctionHandler]: Unknown extern function abort [2023-02-18 05:37:55,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:37:56,021 INFO L208 MainTranslator]: Completed translation [2023-02-18 05:37:56,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56 WrapperNode [2023-02-18 05:37:56,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 05:37:56,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 05:37:56,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 05:37:56,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 05:37:56,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,098 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2023-02-18 05:37:56,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 05:37:56,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 05:37:56,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 05:37:56,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 05:37:56,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 05:37:56,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 05:37:56,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 05:37:56,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 05:37:56,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (1/1) ... [2023-02-18 05:37:56,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:37:56,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:37:56,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 05:37:56,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 05:37:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-18 05:37:56,225 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-18 05:37:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 05:37:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 05:37:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 05:37:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 05:37:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 05:37:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 05:37:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 05:37:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 05:37:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 05:37:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 05:37:56,417 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 05:37:56,419 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 05:37:56,821 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 05:37:56,828 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 05:37:56,828 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 05:37:56,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:37:56 BoogieIcfgContainer [2023-02-18 05:37:56,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 05:37:56,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 05:37:56,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 05:37:56,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 05:37:56,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:37:55" (1/3) ... [2023-02-18 05:37:56,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c1735d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:37:56, skipping insertion in model container [2023-02-18 05:37:56,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:37:56" (2/3) ... [2023-02-18 05:37:56,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c1735d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:37:56, skipping insertion in model container [2023-02-18 05:37:56,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:37:56" (3/3) ... [2023-02-18 05:37:56,836 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2023-02-18 05:37:56,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 05:37:56,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2023-02-18 05:37:56,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 05:37:56,907 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;@1c461cf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 05:37:56,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-02-18 05:37:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:37:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 05:37:56,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:56,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 05:37:56,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1044165707, now seen corresponding path program 1 times [2023-02-18 05:37:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:56,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485258908] [2023-02-18 05:37:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:57,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:57,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485258908] [2023-02-18 05:37:57,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485258908] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:57,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:57,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:37:57,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044865139] [2023-02-18 05:37:57,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:57,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 05:37:57,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 05:37:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 05:37:57,103 INFO L87 Difference]: Start difference. First operand has 147 states, 86 states have (on average 1.941860465116279) internal successors, (167), 143 states have internal predecessors, (167), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:37:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:57,139 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2023-02-18 05:37:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 05:37:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-02-18 05:37:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:57,153 INFO L225 Difference]: With dead ends: 147 [2023-02-18 05:37:57,153 INFO L226 Difference]: Without dead ends: 144 [2023-02-18 05:37:57,155 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 [2023-02-18 05:37:57,158 INFO L413 NwaCegarLoop]: 166 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, 166 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 [2023-02-18 05:37:57,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:37:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-18 05:37:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-02-18 05:37:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.880952380952381) internal successors, (158), 140 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:37:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 162 transitions. [2023-02-18 05:37:57,190 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 162 transitions. Word has length 6 [2023-02-18 05:37:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:57,190 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 162 transitions. [2023-02-18 05:37:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:37:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 162 transitions. [2023-02-18 05:37:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:37:57,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:57,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:57,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 05:37:57,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:57,193 INFO L85 PathProgramCache]: Analyzing trace with hash 594325856, now seen corresponding path program 1 times [2023-02-18 05:37:57,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:57,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826831619] [2023-02-18 05:37:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:57,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826831619] [2023-02-18 05:37:57,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826831619] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:57,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:57,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:57,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365746701] [2023-02-18 05:37:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:57,261 INFO L87 Difference]: Start difference. First operand 144 states and 162 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2023-02-18 05:37:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:57,302 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2023-02-18 05:37:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:57,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2023-02-18 05:37:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:57,305 INFO L225 Difference]: With dead ends: 286 [2023-02-18 05:37:57,305 INFO L226 Difference]: Without dead ends: 286 [2023-02-18 05:37:57,305 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 [2023-02-18 05:37:57,306 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 158 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:57,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 467 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:37:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-02-18 05:37:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 146. [2023-02-18 05:37:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 86 states have (on average 1.8604651162790697) internal successors, (160), 142 states have internal predecessors, (160), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:37:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2023-02-18 05:37:57,319 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 8 [2023-02-18 05:37:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:57,319 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2023-02-18 05:37:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2023-02-18 05:37:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2023-02-18 05:37:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:37:57,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:57,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:57,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 05:37:57,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash 592478814, now seen corresponding path program 1 times [2023-02-18 05:37:57,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:57,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356621806] [2023-02-18 05:37:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:57,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:57,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:57,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356621806] [2023-02-18 05:37:57,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356621806] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:57,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:57,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:37:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814505745] [2023-02-18 05:37:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:57,473 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-02-18 05:37:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:57,666 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2023-02-18 05:37:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2023-02-18 05:37:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:57,671 INFO L225 Difference]: With dead ends: 266 [2023-02-18 05:37:57,671 INFO L226 Difference]: Without dead ends: 266 [2023-02-18 05:37:57,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:37:57,679 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 145 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:57,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 343 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:37:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-18 05:37:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2023-02-18 05:37:57,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 135 states have (on average 1.8592592592592592) internal successors, (251), 192 states have internal predecessors, (251), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 05:37:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2023-02-18 05:37:57,701 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 8 [2023-02-18 05:37:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:57,702 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2023-02-18 05:37:57,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-02-18 05:37:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2023-02-18 05:37:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:37:57,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:57,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:57,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 05:37:57,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash 592478813, now seen corresponding path program 1 times [2023-02-18 05:37:57,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:57,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552892178] [2023-02-18 05:37:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:57,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:57,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:57,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552892178] [2023-02-18 05:37:57,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552892178] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:57,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:57,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-18 05:37:57,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007350369] [2023-02-18 05:37:57,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:57,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:37:57,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:37:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:57,767 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-02-18 05:37:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:57,894 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2023-02-18 05:37:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:37:57,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2023-02-18 05:37:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:57,898 INFO L225 Difference]: With dead ends: 381 [2023-02-18 05:37:57,899 INFO L226 Difference]: Without dead ends: 381 [2023-02-18 05:37:57,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:57,908 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 142 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:57,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 211 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:37:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-18 05:37:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 280. [2023-02-18 05:37:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2023-02-18 05:37:57,931 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2023-02-18 05:37:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:57,931 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2023-02-18 05:37:57,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2023-02-18 05:37:57,931 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2023-02-18 05:37:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:37:57,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:57,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:57,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 05:37:57,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 592478876, now seen corresponding path program 1 times [2023-02-18 05:37:57,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:57,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679442011] [2023-02-18 05:37:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:57,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:58,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:58,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679442011] [2023-02-18 05:37:58,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679442011] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:58,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:58,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:37:58,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111833135] [2023-02-18 05:37:58,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:58,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:58,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:58,042 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-02-18 05:37:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:58,211 INFO L93 Difference]: Finished difference Result 351 states and 440 transitions. [2023-02-18 05:37:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:58,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2023-02-18 05:37:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:58,213 INFO L225 Difference]: With dead ends: 351 [2023-02-18 05:37:58,213 INFO L226 Difference]: Without dead ends: 351 [2023-02-18 05:37:58,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:37:58,215 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 127 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:58,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 360 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:37:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-02-18 05:37:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 280. [2023-02-18 05:37:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 211 states have (on average 1.8056872037914693) internal successors, (381), 269 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 397 transitions. [2023-02-18 05:37:58,233 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 397 transitions. Word has length 8 [2023-02-18 05:37:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:58,233 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 397 transitions. [2023-02-18 05:37:58,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2023-02-18 05:37:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 397 transitions. [2023-02-18 05:37:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 05:37:58,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:58,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:58,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 05:37:58,234 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1779058665, now seen corresponding path program 1 times [2023-02-18 05:37:58,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347037292] [2023-02-18 05:37:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:58,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347037292] [2023-02-18 05:37:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347037292] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:58,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:58,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:58,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580630030] [2023-02-18 05:37:58,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:58,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:37:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:58,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:37:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:58,274 INFO L87 Difference]: Start difference. First operand 280 states and 397 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:37:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:58,293 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2023-02-18 05:37:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:37:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 05:37:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:58,295 INFO L225 Difference]: With dead ends: 383 [2023-02-18 05:37:58,295 INFO L226 Difference]: Without dead ends: 383 [2023-02-18 05:37:58,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:58,297 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:58,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:37:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-18 05:37:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 282. [2023-02-18 05:37:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 213 states have (on average 1.7887323943661972) internal successors, (381), 271 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 397 transitions. [2023-02-18 05:37:58,305 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 397 transitions. Word has length 11 [2023-02-18 05:37:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:58,305 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 397 transitions. [2023-02-18 05:37:58,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:37:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 397 transitions. [2023-02-18 05:37:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 05:37:58,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:58,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:58,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 05:37:58,307 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash 683754949, now seen corresponding path program 1 times [2023-02-18 05:37:58,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:58,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866574105] [2023-02-18 05:37:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866574105] [2023-02-18 05:37:58,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866574105] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:58,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:58,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:37:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625267068] [2023-02-18 05:37:58,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:58,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:37:58,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:37:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:58,339 INFO L87 Difference]: Start difference. First operand 282 states and 397 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:37:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:58,427 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2023-02-18 05:37:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:37:58,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 05:37:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:58,430 INFO L225 Difference]: With dead ends: 337 [2023-02-18 05:37:58,430 INFO L226 Difference]: Without dead ends: 330 [2023-02-18 05:37:58,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:58,431 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 75 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:58,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 239 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:37:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-18 05:37:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2023-02-18 05:37:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 210 states have (on average 1.7904761904761906) internal successors, (376), 268 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2023-02-18 05:37:58,440 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 12 [2023-02-18 05:37:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:58,440 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2023-02-18 05:37:58,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:37:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2023-02-18 05:37:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 05:37:58,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:58,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:58,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 05:37:58,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash -930261550, now seen corresponding path program 1 times [2023-02-18 05:37:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:58,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221939883] [2023-02-18 05:37:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:37:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:58,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:58,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221939883] [2023-02-18 05:37:58,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221939883] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:58,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:58,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:37:58,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302729829] [2023-02-18 05:37:58,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:58,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:58,490 INFO L87 Difference]: Start difference. First operand 279 states and 392 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:58,507 INFO L93 Difference]: Finished difference Result 439 states and 602 transitions. [2023-02-18 05:37:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:58,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-18 05:37:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:58,509 INFO L225 Difference]: With dead ends: 439 [2023-02-18 05:37:58,509 INFO L226 Difference]: Without dead ends: 439 [2023-02-18 05:37:58,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:37:58,510 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 148 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:58,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 452 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:37:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-18 05:37:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 283. [2023-02-18 05:37:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.766355140186916) internal successors, (378), 272 states have internal predecessors, (378), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 394 transitions. [2023-02-18 05:37:58,516 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 394 transitions. Word has length 14 [2023-02-18 05:37:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:58,517 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 394 transitions. [2023-02-18 05:37:58,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 394 transitions. [2023-02-18 05:37:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 05:37:58,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:58,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 05:37:58,518 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash -120914924, now seen corresponding path program 1 times [2023-02-18 05:37:58,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:58,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331662186] [2023-02-18 05:37:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:37:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:58,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331662186] [2023-02-18 05:37:58,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331662186] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:58,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:58,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785105825] [2023-02-18 05:37:58,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:58,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:58,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:58,554 INFO L87 Difference]: Start difference. First operand 283 states and 394 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:58,757 INFO L93 Difference]: Finished difference Result 406 states and 490 transitions. [2023-02-18 05:37:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-18 05:37:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:58,759 INFO L225 Difference]: With dead ends: 406 [2023-02-18 05:37:58,759 INFO L226 Difference]: Without dead ends: 406 [2023-02-18 05:37:58,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:37:58,760 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 269 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:58,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 357 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:37:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-02-18 05:37:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 283. [2023-02-18 05:37:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 214 states have (on average 1.7383177570093458) internal successors, (372), 272 states have internal predecessors, (372), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2023-02-18 05:37:58,768 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 14 [2023-02-18 05:37:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:58,768 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2023-02-18 05:37:58,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2023-02-18 05:37:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 05:37:58,769 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:58,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:58,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 05:37:58,769 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash -120914923, now seen corresponding path program 1 times [2023-02-18 05:37:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:58,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470213212] [2023-02-18 05:37:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:58,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:37:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470213212] [2023-02-18 05:37:58,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470213212] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:58,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:58,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:37:58,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454344994] [2023-02-18 05:37:58,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:58,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:37:58,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:37:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:37:58,858 INFO L87 Difference]: Start difference. First operand 283 states and 388 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:59,057 INFO L93 Difference]: Finished difference Result 323 states and 397 transitions. [2023-02-18 05:37:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:37:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-02-18 05:37:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:59,059 INFO L225 Difference]: With dead ends: 323 [2023-02-18 05:37:59,059 INFO L226 Difference]: Without dead ends: 323 [2023-02-18 05:37:59,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:37:59,060 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 97 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:59,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 600 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:37:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-18 05:37:59,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 287. [2023-02-18 05:37:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 218 states have (on average 1.7293577981651376) internal successors, (377), 274 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 393 transitions. [2023-02-18 05:37:59,067 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 393 transitions. Word has length 14 [2023-02-18 05:37:59,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:59,067 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 393 transitions. [2023-02-18 05:37:59,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,067 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 393 transitions. [2023-02-18 05:37:59,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:37:59,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:59,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 05:37:59,068 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256562, now seen corresponding path program 1 times [2023-02-18 05:37:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:59,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822186218] [2023-02-18 05:37:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:37:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822186218] [2023-02-18 05:37:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822186218] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:59,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201753835] [2023-02-18 05:37:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:59,117 INFO L87 Difference]: Start difference. First operand 287 states and 393 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:59,312 INFO L93 Difference]: Finished difference Result 466 states and 595 transitions. [2023-02-18 05:37:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-18 05:37:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:59,314 INFO L225 Difference]: With dead ends: 466 [2023-02-18 05:37:59,314 INFO L226 Difference]: Without dead ends: 466 [2023-02-18 05:37:59,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:37:59,315 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:59,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 370 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:37:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-18 05:37:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 293. [2023-02-18 05:37:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.7098214285714286) internal successors, (383), 280 states have internal predecessors, (383), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 399 transitions. [2023-02-18 05:37:59,322 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 399 transitions. Word has length 17 [2023-02-18 05:37:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:59,322 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 399 transitions. [2023-02-18 05:37:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 399 transitions. [2023-02-18 05:37:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:37:59,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:59,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:59,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 05:37:59,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1042256563, now seen corresponding path program 1 times [2023-02-18 05:37:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:59,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144641309] [2023-02-18 05:37:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:37:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:59,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144641309] [2023-02-18 05:37:59,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144641309] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:59,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:59,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:59,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764617616] [2023-02-18 05:37:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:59,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:59,392 INFO L87 Difference]: Start difference. First operand 293 states and 399 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:59,551 INFO L93 Difference]: Finished difference Result 342 states and 419 transitions. [2023-02-18 05:37:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:59,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-18 05:37:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:59,552 INFO L225 Difference]: With dead ends: 342 [2023-02-18 05:37:59,552 INFO L226 Difference]: Without dead ends: 342 [2023-02-18 05:37:59,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:37:59,553 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 178 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:59,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 363 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:37:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-18 05:37:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 293. [2023-02-18 05:37:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 224 states have (on average 1.6830357142857142) internal successors, (377), 280 states have internal predecessors, (377), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 393 transitions. [2023-02-18 05:37:59,561 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 393 transitions. Word has length 17 [2023-02-18 05:37:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:59,562 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 393 transitions. [2023-02-18 05:37:59,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 393 transitions. [2023-02-18 05:37:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 05:37:59,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:59,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:59,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 05:37:59,566 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140034, now seen corresponding path program 1 times [2023-02-18 05:37:59,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754055241] [2023-02-18 05:37:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:59,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:37:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754055241] [2023-02-18 05:37:59,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754055241] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:59,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:59,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:37:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88105042] [2023-02-18 05:37:59,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:37:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:37:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:59,597 INFO L87 Difference]: Start difference. First operand 293 states and 393 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:59,686 INFO L93 Difference]: Finished difference Result 385 states and 494 transitions. [2023-02-18 05:37:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:37:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-18 05:37:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:59,688 INFO L225 Difference]: With dead ends: 385 [2023-02-18 05:37:59,688 INFO L226 Difference]: Without dead ends: 385 [2023-02-18 05:37:59,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:37:59,689 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 135 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:59,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 263 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:37:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-02-18 05:37:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 290. [2023-02-18 05:37:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 224 states have (on average 1.65625) internal successors, (371), 277 states have internal predecessors, (371), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 387 transitions. [2023-02-18 05:37:59,695 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 387 transitions. Word has length 20 [2023-02-18 05:37:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:59,695 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 387 transitions. [2023-02-18 05:37:59,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 387 transitions. [2023-02-18 05:37:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 05:37:59,696 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:59,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:59,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 05:37:59,696 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1738140033, now seen corresponding path program 1 times [2023-02-18 05:37:59,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:59,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229325747] [2023-02-18 05:37:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:37:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:59,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229325747] [2023-02-18 05:37:59,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229325747] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:59,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:59,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476368702] [2023-02-18 05:37:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:59,760 INFO L87 Difference]: Start difference. First operand 290 states and 387 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:37:59,906 INFO L93 Difference]: Finished difference Result 505 states and 618 transitions. [2023-02-18 05:37:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:37:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-02-18 05:37:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:37:59,908 INFO L225 Difference]: With dead ends: 505 [2023-02-18 05:37:59,908 INFO L226 Difference]: Without dead ends: 505 [2023-02-18 05:37:59,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:59,908 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 361 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:37:59,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 418 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:37:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-18 05:37:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 293. [2023-02-18 05:37:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 280 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:37:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 389 transitions. [2023-02-18 05:37:59,915 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 389 transitions. Word has length 20 [2023-02-18 05:37:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:37:59,915 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 389 transitions. [2023-02-18 05:37:59,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:37:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 389 transitions. [2023-02-18 05:37:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 05:37:59,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:37:59,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:37:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 05:37:59,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:37:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:37:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1952233834, now seen corresponding path program 1 times [2023-02-18 05:37:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:37:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554013262] [2023-02-18 05:37:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:37:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:37:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:37:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:37:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:37:59,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:37:59,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554013262] [2023-02-18 05:37:59,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554013262] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:37:59,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:37:59,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:37:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530346170] [2023-02-18 05:37:59,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:37:59,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:37:59,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:37:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:37:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:37:59,995 INFO L87 Difference]: Start difference. First operand 293 states and 389 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:00,151 INFO L93 Difference]: Finished difference Result 504 states and 616 transitions. [2023-02-18 05:38:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-18 05:38:00,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:00,153 INFO L225 Difference]: With dead ends: 504 [2023-02-18 05:38:00,153 INFO L226 Difference]: Without dead ends: 504 [2023-02-18 05:38:00,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:00,154 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 285 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:00,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 487 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-18 05:38:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 295. [2023-02-18 05:38:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6304347826086956) internal successors, (375), 282 states have internal predecessors, (375), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:38:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2023-02-18 05:38:00,161 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 21 [2023-02-18 05:38:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:00,161 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2023-02-18 05:38:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2023-02-18 05:38:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 05:38:00,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:00,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:00,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 05:38:00,163 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1952289538, now seen corresponding path program 1 times [2023-02-18 05:38:00,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:00,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049327554] [2023-02-18 05:38:00,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:00,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:00,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:00,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:00,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049327554] [2023-02-18 05:38:00,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049327554] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:00,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:00,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:38:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410892999] [2023-02-18 05:38:00,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:00,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:00,250 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:00,384 INFO L93 Difference]: Finished difference Result 328 states and 393 transitions. [2023-02-18 05:38:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 05:38:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-18 05:38:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:00,386 INFO L225 Difference]: With dead ends: 328 [2023-02-18 05:38:00,386 INFO L226 Difference]: Without dead ends: 328 [2023-02-18 05:38:00,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:38:00,387 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 337 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:00,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 941 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-02-18 05:38:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2023-02-18 05:38:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 282 states have internal predecessors, (373), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:38:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 389 transitions. [2023-02-18 05:38:00,394 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 389 transitions. Word has length 21 [2023-02-18 05:38:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:00,394 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 389 transitions. [2023-02-18 05:38:00,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 389 transitions. [2023-02-18 05:38:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 05:38:00,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:00,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:00,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 05:38:00,396 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1952291460, now seen corresponding path program 1 times [2023-02-18 05:38:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509807788] [2023-02-18 05:38:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:00,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:00,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:00,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509807788] [2023-02-18 05:38:00,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509807788] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:00,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:00,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:38:00,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794618059] [2023-02-18 05:38:00,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:00,498 INFO L87 Difference]: Start difference. First operand 295 states and 389 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:00,594 INFO L93 Difference]: Finished difference Result 318 states and 379 transitions. [2023-02-18 05:38:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 05:38:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-02-18 05:38:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:00,596 INFO L225 Difference]: With dead ends: 318 [2023-02-18 05:38:00,596 INFO L226 Difference]: Without dead ends: 318 [2023-02-18 05:38:00,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:38:00,597 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 326 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:00,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 980 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-18 05:38:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 285. [2023-02-18 05:38:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 222 states have (on average 1.617117117117117) internal successors, (359), 272 states have internal predecessors, (359), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:38:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 375 transitions. [2023-02-18 05:38:00,603 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 375 transitions. Word has length 21 [2023-02-18 05:38:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:00,603 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 375 transitions. [2023-02-18 05:38:00,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 375 transitions. [2023-02-18 05:38:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 05:38:00,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:00,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:00,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 05:38:00,605 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1056785802, now seen corresponding path program 1 times [2023-02-18 05:38:00,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148930314] [2023-02-18 05:38:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:00,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:00,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:00,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:00,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148930314] [2023-02-18 05:38:00,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148930314] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:00,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:00,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 05:38:00,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649223903] [2023-02-18 05:38:00,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:00,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 05:38:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 05:38:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:38:00,847 INFO L87 Difference]: Start difference. First operand 285 states and 375 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:01,240 INFO L93 Difference]: Finished difference Result 398 states and 505 transitions. [2023-02-18 05:38:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 05:38:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-18 05:38:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:01,243 INFO L225 Difference]: With dead ends: 398 [2023-02-18 05:38:01,243 INFO L226 Difference]: Without dead ends: 396 [2023-02-18 05:38:01,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:01,244 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 234 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:01,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 779 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:38:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-18 05:38:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 337. [2023-02-18 05:38:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 269 states have (on average 1.5910780669144982) internal successors, (428), 320 states have internal predecessors, (428), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 05:38:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 450 transitions. [2023-02-18 05:38:01,251 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 450 transitions. Word has length 23 [2023-02-18 05:38:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:01,251 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 450 transitions. [2023-02-18 05:38:01,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 450 transitions. [2023-02-18 05:38:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 05:38:01,252 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:01,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:01,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 05:38:01,253 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:01,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233503, now seen corresponding path program 1 times [2023-02-18 05:38:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:01,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845155689] [2023-02-18 05:38:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:01,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:01,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:01,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845155689] [2023-02-18 05:38:01,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845155689] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:01,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:01,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:01,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415837514] [2023-02-18 05:38:01,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:01,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:01,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:01,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:01,301 INFO L87 Difference]: Start difference. First operand 337 states and 450 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:01,470 INFO L93 Difference]: Finished difference Result 504 states and 649 transitions. [2023-02-18 05:38:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:01,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-18 05:38:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:01,473 INFO L225 Difference]: With dead ends: 504 [2023-02-18 05:38:01,473 INFO L226 Difference]: Without dead ends: 504 [2023-02-18 05:38:01,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:01,474 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 224 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:01,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 354 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-02-18 05:38:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 361. [2023-02-18 05:38:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.6245733788395904) internal successors, (476), 344 states have internal predecessors, (476), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 05:38:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2023-02-18 05:38:01,483 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 25 [2023-02-18 05:38:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:01,483 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2023-02-18 05:38:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2023-02-18 05:38:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 05:38:01,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:01,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-18 05:38:01,484 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1951233502, now seen corresponding path program 1 times [2023-02-18 05:38:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:01,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877506207] [2023-02-18 05:38:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:01,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:01,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:01,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877506207] [2023-02-18 05:38:01,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877506207] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:01,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:01,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709420436] [2023-02-18 05:38:01,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:01,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:01,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:01,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:01,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:01,596 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:01,836 INFO L93 Difference]: Finished difference Result 412 states and 520 transitions. [2023-02-18 05:38:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:01,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-18 05:38:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:01,838 INFO L225 Difference]: With dead ends: 412 [2023-02-18 05:38:01,838 INFO L226 Difference]: Without dead ends: 412 [2023-02-18 05:38:01,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:38:01,839 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 331 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:01,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 423 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-18 05:38:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 361. [2023-02-18 05:38:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 293 states have (on average 1.583617747440273) internal successors, (464), 344 states have internal predecessors, (464), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 05:38:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 486 transitions. [2023-02-18 05:38:01,846 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 486 transitions. Word has length 25 [2023-02-18 05:38:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:01,847 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 486 transitions. [2023-02-18 05:38:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 486 transitions. [2023-02-18 05:38:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 05:38:01,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:01,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-18 05:38:01,848 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 456369005, now seen corresponding path program 1 times [2023-02-18 05:38:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:01,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12915343] [2023-02-18 05:38:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:01,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:02,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:02,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12915343] [2023-02-18 05:38:02,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12915343] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:02,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:02,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 05:38:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509796507] [2023-02-18 05:38:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:02,074 INFO L87 Difference]: Start difference. First operand 361 states and 486 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:02,342 INFO L93 Difference]: Finished difference Result 639 states and 825 transitions. [2023-02-18 05:38:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-18 05:38:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:02,346 INFO L225 Difference]: With dead ends: 639 [2023-02-18 05:38:02,346 INFO L226 Difference]: Without dead ends: 639 [2023-02-18 05:38:02,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-02-18 05:38:02,347 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 504 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:02,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1038 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-02-18 05:38:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 423. [2023-02-18 05:38:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 352 states have (on average 1.5482954545454546) internal successors, (545), 403 states have internal predecessors, (545), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 05:38:02,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 571 transitions. [2023-02-18 05:38:02,357 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 571 transitions. Word has length 25 [2023-02-18 05:38:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:02,357 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 571 transitions. [2023-02-18 05:38:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 571 transitions. [2023-02-18 05:38:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 05:38:02,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:02,358 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, 1] [2023-02-18 05:38:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-18 05:38:02,358 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 484106160, now seen corresponding path program 1 times [2023-02-18 05:38:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:02,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045396924] [2023-02-18 05:38:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:02,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:02,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045396924] [2023-02-18 05:38:02,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045396924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:02,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:02,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67780365] [2023-02-18 05:38:02,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:02,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:02,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:02,474 INFO L87 Difference]: Start difference. First operand 423 states and 571 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:02,732 INFO L93 Difference]: Finished difference Result 532 states and 666 transitions. [2023-02-18 05:38:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-18 05:38:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:02,735 INFO L225 Difference]: With dead ends: 532 [2023-02-18 05:38:02,735 INFO L226 Difference]: Without dead ends: 532 [2023-02-18 05:38:02,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:38:02,737 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 948 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:02,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 342 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-18 05:38:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 439. [2023-02-18 05:38:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 373 states have (on average 1.5308310991957104) internal successors, (571), 418 states have internal predecessors, (571), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 05:38:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 599 transitions. [2023-02-18 05:38:02,750 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 599 transitions. Word has length 27 [2023-02-18 05:38:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:02,750 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 599 transitions. [2023-02-18 05:38:02,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 599 transitions. [2023-02-18 05:38:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 05:38:02,751 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:02,751 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, 1, 1] [2023-02-18 05:38:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-18 05:38:02,751 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1109766870, now seen corresponding path program 1 times [2023-02-18 05:38:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420591859] [2023-02-18 05:38:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:02,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:02,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:02,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420591859] [2023-02-18 05:38:02,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420591859] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:02,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:02,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:02,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301464048] [2023-02-18 05:38:02,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:02,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:02,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:02,831 INFO L87 Difference]: Start difference. First operand 439 states and 599 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:03,051 INFO L93 Difference]: Finished difference Result 691 states and 907 transitions. [2023-02-18 05:38:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:03,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-18 05:38:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:03,055 INFO L225 Difference]: With dead ends: 691 [2023-02-18 05:38:03,055 INFO L226 Difference]: Without dead ends: 691 [2023-02-18 05:38:03,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:03,055 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 466 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:03,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 896 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-02-18 05:38:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 436. [2023-02-18 05:38:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 373 states have (on average 1.5040214477211795) internal successors, (561), 415 states have internal predecessors, (561), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 05:38:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 589 transitions. [2023-02-18 05:38:03,066 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 589 transitions. Word has length 28 [2023-02-18 05:38:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:03,066 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 589 transitions. [2023-02-18 05:38:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 589 transitions. [2023-02-18 05:38:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 05:38:03,066 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:03,067 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, 1, 1] [2023-02-18 05:38:03,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-18 05:38:03,067 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2122389103, now seen corresponding path program 1 times [2023-02-18 05:38:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:03,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624899951] [2023-02-18 05:38:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:03,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624899951] [2023-02-18 05:38:03,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624899951] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:03,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:03,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212790337] [2023-02-18 05:38:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:03,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:03,140 INFO L87 Difference]: Start difference. First operand 436 states and 589 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:03,243 INFO L93 Difference]: Finished difference Result 459 states and 587 transitions. [2023-02-18 05:38:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:38:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-18 05:38:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:03,246 INFO L225 Difference]: With dead ends: 459 [2023-02-18 05:38:03,246 INFO L226 Difference]: Without dead ends: 459 [2023-02-18 05:38:03,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:03,248 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 522 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:03,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 404 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-18 05:38:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2023-02-18 05:38:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4932975871313674) internal successors, (557), 413 states have internal predecessors, (557), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 05:38:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 585 transitions. [2023-02-18 05:38:03,261 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 585 transitions. Word has length 28 [2023-02-18 05:38:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:03,261 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 585 transitions. [2023-02-18 05:38:03,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 585 transitions. [2023-02-18 05:38:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 05:38:03,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:03,262 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, 1, 1, 1] [2023-02-18 05:38:03,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-18 05:38:03,263 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash -43057304, now seen corresponding path program 1 times [2023-02-18 05:38:03,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:03,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181480304] [2023-02-18 05:38:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181480304] [2023-02-18 05:38:03,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181480304] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:03,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:03,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712020076] [2023-02-18 05:38:03,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:03,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:03,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:03,367 INFO L87 Difference]: Start difference. First operand 434 states and 585 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:03,485 INFO L93 Difference]: Finished difference Result 493 states and 639 transitions. [2023-02-18 05:38:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:03,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-02-18 05:38:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:03,487 INFO L225 Difference]: With dead ends: 493 [2023-02-18 05:38:03,487 INFO L226 Difference]: Without dead ends: 493 [2023-02-18 05:38:03,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:03,488 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 154 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:03,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 501 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-18 05:38:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 434. [2023-02-18 05:38:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 373 states have (on average 1.4879356568364612) internal successors, (555), 413 states have internal predecessors, (555), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 05:38:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 583 transitions. [2023-02-18 05:38:03,502 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 583 transitions. Word has length 29 [2023-02-18 05:38:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:03,503 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 583 transitions. [2023-02-18 05:38:03,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 583 transitions. [2023-02-18 05:38:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 05:38:03,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:03,504 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, 1, 1, 1, 1] [2023-02-18 05:38:03,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-18 05:38:03,504 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1334068214, now seen corresponding path program 1 times [2023-02-18 05:38:03,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:03,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473400788] [2023-02-18 05:38:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:03,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:03,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:03,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:03,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473400788] [2023-02-18 05:38:03,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473400788] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:03,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:03,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:03,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128387765] [2023-02-18 05:38:03,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:03,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:03,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:03,692 INFO L87 Difference]: Start difference. First operand 434 states and 583 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:03,912 INFO L93 Difference]: Finished difference Result 475 states and 613 transitions. [2023-02-18 05:38:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:03,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-02-18 05:38:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:03,914 INFO L225 Difference]: With dead ends: 475 [2023-02-18 05:38:03,914 INFO L226 Difference]: Without dead ends: 475 [2023-02-18 05:38:03,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:38:03,915 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 130 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:03,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 624 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-18 05:38:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 428. [2023-02-18 05:38:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 367 states have (on average 1.4741144414168936) internal successors, (541), 407 states have internal predecessors, (541), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 05:38:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 569 transitions. [2023-02-18 05:38:03,923 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 569 transitions. Word has length 30 [2023-02-18 05:38:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:03,923 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 569 transitions. [2023-02-18 05:38:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 569 transitions. [2023-02-18 05:38:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 05:38:03,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:03,924 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, 1, 1, 1, 1] [2023-02-18 05:38:03,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-18 05:38:03,924 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:03,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1334776215, now seen corresponding path program 1 times [2023-02-18 05:38:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:03,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392723612] [2023-02-18 05:38:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:04,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:04,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392723612] [2023-02-18 05:38:04,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392723612] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:04,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:04,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:04,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706472509] [2023-02-18 05:38:04,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:04,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:04,016 INFO L87 Difference]: Start difference. First operand 428 states and 569 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:04,175 INFO L93 Difference]: Finished difference Result 534 states and 690 transitions. [2023-02-18 05:38:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:38:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-02-18 05:38:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:04,177 INFO L225 Difference]: With dead ends: 534 [2023-02-18 05:38:04,177 INFO L226 Difference]: Without dead ends: 534 [2023-02-18 05:38:04,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:04,178 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 147 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:04,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 458 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-02-18 05:38:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 468. [2023-02-18 05:38:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 404 states have (on average 1.4678217821782178) internal successors, (593), 445 states have internal predecessors, (593), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-18 05:38:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 625 transitions. [2023-02-18 05:38:04,186 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 625 transitions. Word has length 30 [2023-02-18 05:38:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:04,187 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 625 transitions. [2023-02-18 05:38:04,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 625 transitions. [2023-02-18 05:38:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 05:38:04,187 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:04,187 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, 1, 1, 1, 1] [2023-02-18 05:38:04,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-18 05:38:04,188 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:04,188 INFO L85 PathProgramCache]: Analyzing trace with hash -493536303, now seen corresponding path program 1 times [2023-02-18 05:38:04,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:04,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609084290] [2023-02-18 05:38:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:04,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:04,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:04,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609084290] [2023-02-18 05:38:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609084290] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:04,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:04,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:38:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499700827] [2023-02-18 05:38:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:04,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:04,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:04,323 INFO L87 Difference]: Start difference. First operand 468 states and 625 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:04,553 INFO L93 Difference]: Finished difference Result 555 states and 683 transitions. [2023-02-18 05:38:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:38:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-02-18 05:38:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:04,555 INFO L225 Difference]: With dead ends: 555 [2023-02-18 05:38:04,555 INFO L226 Difference]: Without dead ends: 555 [2023-02-18 05:38:04,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2023-02-18 05:38:04,556 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 793 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:04,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 331 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-02-18 05:38:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 469. [2023-02-18 05:38:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 406 states have (on average 1.458128078817734) internal successors, (592), 445 states have internal predecessors, (592), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 05:38:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 626 transitions. [2023-02-18 05:38:04,565 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 626 transitions. Word has length 30 [2023-02-18 05:38:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:04,565 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 626 transitions. [2023-02-18 05:38:04,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 626 transitions. [2023-02-18 05:38:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 05:38:04,566 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:04,566 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, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:04,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-18 05:38:04,566 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1475285643, now seen corresponding path program 1 times [2023-02-18 05:38:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:04,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124948190] [2023-02-18 05:38:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:04,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:04,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124948190] [2023-02-18 05:38:04,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124948190] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:04,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:04,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:04,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882279735] [2023-02-18 05:38:04,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:04,707 INFO L87 Difference]: Start difference. First operand 469 states and 626 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:05,080 INFO L93 Difference]: Finished difference Result 893 states and 1179 transitions. [2023-02-18 05:38:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 05:38:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-02-18 05:38:05,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:05,083 INFO L225 Difference]: With dead ends: 893 [2023-02-18 05:38:05,084 INFO L226 Difference]: Without dead ends: 893 [2023-02-18 05:38:05,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-18 05:38:05,084 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 340 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:05,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 728 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:38:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-02-18 05:38:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 544. [2023-02-18 05:38:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 475 states have (on average 1.4442105263157894) internal successors, (686), 516 states have internal predecessors, (686), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 05:38:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 728 transitions. [2023-02-18 05:38:05,095 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 728 transitions. Word has length 32 [2023-02-18 05:38:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:05,095 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 728 transitions. [2023-02-18 05:38:05,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 728 transitions. [2023-02-18 05:38:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 05:38:05,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:05,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:05,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-18 05:38:05,096 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:05,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1918246339, now seen corresponding path program 1 times [2023-02-18 05:38:05,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:05,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590787435] [2023-02-18 05:38:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:05,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-18 05:38:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590787435] [2023-02-18 05:38:05,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590787435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743793477] [2023-02-18 05:38:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:05,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:05,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:05,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:05,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 05:38:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 05:38:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 05:38:05,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:05,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743793477] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:05,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:05,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-02-18 05:38:05,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861522435] [2023-02-18 05:38:05,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:05,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:05,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:05,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:05,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:05,295 INFO L87 Difference]: Start difference. First operand 544 states and 728 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:05,303 INFO L93 Difference]: Finished difference Result 553 states and 736 transitions. [2023-02-18 05:38:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-02-18 05:38:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:05,319 INFO L225 Difference]: With dead ends: 553 [2023-02-18 05:38:05,319 INFO L226 Difference]: Without dead ends: 552 [2023-02-18 05:38:05,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:05,320 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:05,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2023-02-18 05:38:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 548. [2023-02-18 05:38:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4384133611691023) internal successors, (689), 520 states have internal predecessors, (689), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 05:38:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 731 transitions. [2023-02-18 05:38:05,328 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 731 transitions. Word has length 33 [2023-02-18 05:38:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:05,329 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 731 transitions. [2023-02-18 05:38:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 731 transitions. [2023-02-18 05:38:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 05:38:05,329 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:05,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:05,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 05:38:05,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:05,530 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1559072507, now seen corresponding path program 1 times [2023-02-18 05:38:05,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:05,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037370211] [2023-02-18 05:38:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:05,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:05,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-18 05:38:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037370211] [2023-02-18 05:38:05,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037370211] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:05,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:05,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 05:38:05,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961537823] [2023-02-18 05:38:05,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:05,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 05:38:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 05:38:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:38:05,794 INFO L87 Difference]: Start difference. First operand 548 states and 731 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:06,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:06,155 INFO L93 Difference]: Finished difference Result 555 states and 726 transitions. [2023-02-18 05:38:06,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 05:38:06,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-02-18 05:38:06,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:06,158 INFO L225 Difference]: With dead ends: 555 [2023-02-18 05:38:06,158 INFO L226 Difference]: Without dead ends: 553 [2023-02-18 05:38:06,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-02-18 05:38:06,159 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 196 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:06,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 812 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:38:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-02-18 05:38:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 505. [2023-02-18 05:38:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4328018223234624) internal successors, (629), 479 states have internal predecessors, (629), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 05:38:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 667 transitions. [2023-02-18 05:38:06,172 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 667 transitions. Word has length 33 [2023-02-18 05:38:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:06,172 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 667 transitions. [2023-02-18 05:38:06,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 667 transitions. [2023-02-18 05:38:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 05:38:06,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:06,173 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:06,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-18 05:38:06,174 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:06,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:06,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1510785108, now seen corresponding path program 1 times [2023-02-18 05:38:06,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:06,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374968121] [2023-02-18 05:38:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:06,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:06,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374968121] [2023-02-18 05:38:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374968121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:06,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:06,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:06,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086228547] [2023-02-18 05:38:06,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:06,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:06,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:06,355 INFO L87 Difference]: Start difference. First operand 505 states and 667 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:06,651 INFO L93 Difference]: Finished difference Result 566 states and 708 transitions. [2023-02-18 05:38:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:38:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-02-18 05:38:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:06,654 INFO L225 Difference]: With dead ends: 566 [2023-02-18 05:38:06,654 INFO L226 Difference]: Without dead ends: 566 [2023-02-18 05:38:06,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-02-18 05:38:06,655 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 403 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:06,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 524 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-02-18 05:38:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 505. [2023-02-18 05:38:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 439 states have (on average 1.4214123006833712) internal successors, (624), 479 states have internal predecessors, (624), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 05:38:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 662 transitions. [2023-02-18 05:38:06,666 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 662 transitions. Word has length 33 [2023-02-18 05:38:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:06,666 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 662 transitions. [2023-02-18 05:38:06,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 662 transitions. [2023-02-18 05:38:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 05:38:06,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:06,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-18 05:38:06,668 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 896646995, now seen corresponding path program 1 times [2023-02-18 05:38:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:06,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121888744] [2023-02-18 05:38:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:06,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:06,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:06,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 05:38:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 05:38:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:06,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121888744] [2023-02-18 05:38:06,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121888744] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:06,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:06,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:06,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969843941] [2023-02-18 05:38:06,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:06,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:06,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:06,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:06,700 INFO L87 Difference]: Start difference. First operand 505 states and 662 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:06,708 INFO L93 Difference]: Finished difference Result 507 states and 664 transitions. [2023-02-18 05:38:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-02-18 05:38:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:06,710 INFO L225 Difference]: With dead ends: 507 [2023-02-18 05:38:06,710 INFO L226 Difference]: Without dead ends: 507 [2023-02-18 05:38:06,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:06,711 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:06,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 274 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-02-18 05:38:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2023-02-18 05:38:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 441 states have (on average 1.4195011337868482) internal successors, (626), 481 states have internal predecessors, (626), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 05:38:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 664 transitions. [2023-02-18 05:38:06,723 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 664 transitions. Word has length 41 [2023-02-18 05:38:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:06,723 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 664 transitions. [2023-02-18 05:38:06,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 664 transitions. [2023-02-18 05:38:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 05:38:06,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:06,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:06,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-18 05:38:06,725 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1705993621, now seen corresponding path program 1 times [2023-02-18 05:38:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983650781] [2023-02-18 05:38:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:06,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:07,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:07,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 05:38:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983650781] [2023-02-18 05:38:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983650781] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:07,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613793735] [2023-02-18 05:38:07,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:07,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:07,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:07,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:07,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 05:38:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 05:38:07,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:07,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:07,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:07,409 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 38 treesize of output 42 [2023-02-18 05:38:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:07,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613793735] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:07,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:07,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 23 [2023-02-18 05:38:07,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034708596] [2023-02-18 05:38:07,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:07,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 05:38:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 05:38:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-02-18 05:38:07,499 INFO L87 Difference]: Start difference. First operand 507 states and 664 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-18 05:38:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:08,019 INFO L93 Difference]: Finished difference Result 532 states and 664 transitions. [2023-02-18 05:38:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2023-02-18 05:38:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:08,022 INFO L225 Difference]: With dead ends: 532 [2023-02-18 05:38:08,022 INFO L226 Difference]: Without dead ends: 532 [2023-02-18 05:38:08,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2023-02-18 05:38:08,023 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1239 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:08,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 1546 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-18 05:38:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 504. [2023-02-18 05:38:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 439 states have (on average 1.4123006833712983) internal successors, (620), 479 states have internal predecessors, (620), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 05:38:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 658 transitions. [2023-02-18 05:38:08,033 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 658 transitions. Word has length 41 [2023-02-18 05:38:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:08,033 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 658 transitions. [2023-02-18 05:38:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 22 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-18 05:38:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 658 transitions. [2023-02-18 05:38:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 05:38:08,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:08,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:08,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-18 05:38:08,240 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1350180533, now seen corresponding path program 1 times [2023-02-18 05:38:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:08,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103892006] [2023-02-18 05:38:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 05:38:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103892006] [2023-02-18 05:38:08,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103892006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:08,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339313781] [2023-02-18 05:38:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:08,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:08,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:08,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:08,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 05:38:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:38:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:08,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:08,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339313781] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:08,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:08,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-18 05:38:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331462028] [2023-02-18 05:38:08,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:08,438 INFO L87 Difference]: Start difference. First operand 504 states and 658 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-18 05:38:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:08,490 INFO L93 Difference]: Finished difference Result 1164 states and 1506 transitions. [2023-02-18 05:38:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-18 05:38:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:08,495 INFO L225 Difference]: With dead ends: 1164 [2023-02-18 05:38:08,495 INFO L226 Difference]: Without dead ends: 1164 [2023-02-18 05:38:08,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:08,496 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 718 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:08,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 722 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2023-02-18 05:38:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 666. [2023-02-18 05:38:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 595 states have (on average 1.3647058823529412) internal successors, (812), 635 states have internal predecessors, (812), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-18 05:38:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 862 transitions. [2023-02-18 05:38:08,528 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 862 transitions. Word has length 44 [2023-02-18 05:38:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:08,529 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 862 transitions. [2023-02-18 05:38:08,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-18 05:38:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 862 transitions. [2023-02-18 05:38:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 05:38:08,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:08,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:08,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 05:38:08,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:08,736 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:08,736 INFO L85 PathProgramCache]: Analyzing trace with hash 649115955, now seen corresponding path program 1 times [2023-02-18 05:38:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539996633] [2023-02-18 05:38:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:08,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 05:38:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:08,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539996633] [2023-02-18 05:38:08,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539996633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455478431] [2023-02-18 05:38:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:08,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:08,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:08,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 05:38:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 05:38:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:09,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:09,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455478431] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:09,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:09,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-02-18 05:38:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283742284] [2023-02-18 05:38:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:09,054 INFO L87 Difference]: Start difference. First operand 666 states and 862 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:09,262 INFO L93 Difference]: Finished difference Result 860 states and 1070 transitions. [2023-02-18 05:38:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-02-18 05:38:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:09,266 INFO L225 Difference]: With dead ends: 860 [2023-02-18 05:38:09,266 INFO L226 Difference]: Without dead ends: 860 [2023-02-18 05:38:09,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:09,266 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 457 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:09,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 412 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:09,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-02-18 05:38:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 663. [2023-02-18 05:38:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 595 states have (on average 1.3512605042016808) internal successors, (804), 632 states have internal predecessors, (804), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-18 05:38:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 854 transitions. [2023-02-18 05:38:09,279 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 854 transitions. Word has length 44 [2023-02-18 05:38:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:09,279 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 854 transitions. [2023-02-18 05:38:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 854 transitions. [2023-02-18 05:38:09,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 05:38:09,280 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:09,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:09,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:09,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:09,486 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1877190129, now seen corresponding path program 1 times [2023-02-18 05:38:09,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:09,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696954916] [2023-02-18 05:38:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:09,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 05:38:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696954916] [2023-02-18 05:38:09,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696954916] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237186028] [2023-02-18 05:38:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:09,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:09,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 05:38:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 05:38:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:09,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:09,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:09,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2023-02-18 05:38:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:09,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237186028] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:09,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:09,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-18 05:38:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060454405] [2023-02-18 05:38:09,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:09,715 INFO L87 Difference]: Start difference. First operand 663 states and 854 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 05:38:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:10,238 INFO L93 Difference]: Finished difference Result 2142 states and 2679 transitions. [2023-02-18 05:38:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 05:38:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2023-02-18 05:38:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:10,246 INFO L225 Difference]: With dead ends: 2142 [2023-02-18 05:38:10,246 INFO L226 Difference]: Without dead ends: 2142 [2023-02-18 05:38:10,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-02-18 05:38:10,247 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1770 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:10,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 1030 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 05:38:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2023-02-18 05:38:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 851. [2023-02-18 05:38:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 775 states have (on average 1.2967741935483872) internal successors, (1005), 808 states have internal predecessors, (1005), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-18 05:38:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1077 transitions. [2023-02-18 05:38:10,272 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1077 transitions. Word has length 46 [2023-02-18 05:38:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:10,272 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1077 transitions. [2023-02-18 05:38:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 05:38:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1077 transitions. [2023-02-18 05:38:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 05:38:10,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:10,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:10,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:10,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-18 05:38:10,482 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:10,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1534969807, now seen corresponding path program 1 times [2023-02-18 05:38:10,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:10,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354363237] [2023-02-18 05:38:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:10,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354363237] [2023-02-18 05:38:10,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354363237] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068975146] [2023-02-18 05:38:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:10,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:10,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:10,552 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:10,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 05:38:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:10,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:38:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:10,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:10,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068975146] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:10,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:10,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 7 [2023-02-18 05:38:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706199407] [2023-02-18 05:38:10,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:10,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:10,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:10,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:10,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:10,683 INFO L87 Difference]: Start difference. First operand 851 states and 1077 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 05:38:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:10,732 INFO L93 Difference]: Finished difference Result 2768 states and 3486 transitions. [2023-02-18 05:38:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 05:38:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-02-18 05:38:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:10,741 INFO L225 Difference]: With dead ends: 2768 [2023-02-18 05:38:10,741 INFO L226 Difference]: Without dead ends: 2768 [2023-02-18 05:38:10,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-18 05:38:10,742 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 427 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:10,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 616 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2023-02-18 05:38:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 1928. [2023-02-18 05:38:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1792 states have (on average 1.29296875) internal successors, (2317), 1829 states have internal predecessors, (2317), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 05:38:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2473 transitions. [2023-02-18 05:38:10,781 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2473 transitions. Word has length 45 [2023-02-18 05:38:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:10,781 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 2473 transitions. [2023-02-18 05:38:10,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 05:38:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2473 transitions. [2023-02-18 05:38:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 05:38:10,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:10,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:10,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:10,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 05:38:10,988 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816849, now seen corresponding path program 1 times [2023-02-18 05:38:10,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:10,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542465519] [2023-02-18 05:38:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:10,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:11,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542465519] [2023-02-18 05:38:11,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542465519] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:11,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390325815] [2023-02-18 05:38:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:11,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:11,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:11,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 05:38:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 05:38:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:11,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:11,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390325815] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:11,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:11,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-02-18 05:38:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984884827] [2023-02-18 05:38:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:11,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:11,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-18 05:38:11,411 INFO L87 Difference]: Start difference. First operand 1928 states and 2473 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:11,564 INFO L93 Difference]: Finished difference Result 1976 states and 2504 transitions. [2023-02-18 05:38:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-18 05:38:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:11,570 INFO L225 Difference]: With dead ends: 1976 [2023-02-18 05:38:11,570 INFO L226 Difference]: Without dead ends: 1976 [2023-02-18 05:38:11,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-02-18 05:38:11,571 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 302 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:11,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 397 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-02-18 05:38:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2023-02-18 05:38:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1794 states have (on average 1.2931995540691192) internal successors, (2320), 1831 states have internal predecessors, (2320), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 05:38:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2476 transitions. [2023-02-18 05:38:11,602 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2476 transitions. Word has length 45 [2023-02-18 05:38:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:11,602 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 2476 transitions. [2023-02-18 05:38:11,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2476 transitions. [2023-02-18 05:38:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 05:38:11,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:11,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:11,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:11,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:11,810 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1536816787, now seen corresponding path program 1 times [2023-02-18 05:38:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:11,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001506920] [2023-02-18 05:38:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:11,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001506920] [2023-02-18 05:38:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001506920] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163012453] [2023-02-18 05:38:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:11,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:11,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:11,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 05:38:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 05:38:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:12,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:12,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163012453] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:12,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:12,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-02-18 05:38:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332743809] [2023-02-18 05:38:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 05:38:12,084 INFO L87 Difference]: Start difference. First operand 1930 states and 2476 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:12,212 INFO L93 Difference]: Finished difference Result 1975 states and 2502 transitions. [2023-02-18 05:38:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:12,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-02-18 05:38:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:12,222 INFO L225 Difference]: With dead ends: 1975 [2023-02-18 05:38:12,225 INFO L226 Difference]: Without dead ends: 1975 [2023-02-18 05:38:12,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:12,229 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 365 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:12,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 354 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2023-02-18 05:38:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1927. [2023-02-18 05:38:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2918526785714286) internal successors, (2315), 1828 states have internal predecessors, (2315), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 05:38:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2471 transitions. [2023-02-18 05:38:12,259 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2471 transitions. Word has length 45 [2023-02-18 05:38:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:12,259 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2471 transitions. [2023-02-18 05:38:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2471 transitions. [2023-02-18 05:38:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 05:38:12,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:12,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:12,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:12,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 05:38:12,471 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1040806822, now seen corresponding path program 1 times [2023-02-18 05:38:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:12,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084176323] [2023-02-18 05:38:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:13,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:13,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084176323] [2023-02-18 05:38:13,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084176323] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:13,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:13,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-18 05:38:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889913120] [2023-02-18 05:38:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:13,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 05:38:13,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 05:38:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:13,210 INFO L87 Difference]: Start difference. First operand 1927 states and 2471 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:13,852 INFO L93 Difference]: Finished difference Result 1976 states and 2523 transitions. [2023-02-18 05:38:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 05:38:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-02-18 05:38:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:13,857 INFO L225 Difference]: With dead ends: 1976 [2023-02-18 05:38:13,857 INFO L226 Difference]: Without dead ends: 1976 [2023-02-18 05:38:13,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-02-18 05:38:13,858 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 90 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:13,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 972 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 05:38:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2023-02-18 05:38:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1957. [2023-02-18 05:38:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1822 states have (on average 1.2892425905598244) internal successors, (2349), 1858 states have internal predecessors, (2349), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 05:38:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2505 transitions. [2023-02-18 05:38:13,888 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2505 transitions. Word has length 48 [2023-02-18 05:38:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 2505 transitions. [2023-02-18 05:38:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2505 transitions. [2023-02-18 05:38:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 05:38:13,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:13,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:13,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-18 05:38:13,890 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1279480752, now seen corresponding path program 1 times [2023-02-18 05:38:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:13,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825309483] [2023-02-18 05:38:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:14,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:14,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:14,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825309483] [2023-02-18 05:38:14,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825309483] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:14,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:14,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 05:38:14,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050064243] [2023-02-18 05:38:14,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 05:38:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 05:38:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-18 05:38:14,052 INFO L87 Difference]: Start difference. First operand 1957 states and 2505 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:14,229 INFO L93 Difference]: Finished difference Result 2179 states and 2767 transitions. [2023-02-18 05:38:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-02-18 05:38:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:14,238 INFO L225 Difference]: With dead ends: 2179 [2023-02-18 05:38:14,243 INFO L226 Difference]: Without dead ends: 2179 [2023-02-18 05:38:14,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-18 05:38:14,243 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 841 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:14,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 976 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2023-02-18 05:38:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1927. [2023-02-18 05:38:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1792 states have (on average 1.2756696428571428) internal successors, (2286), 1828 states have internal predecessors, (2286), 78 states have call successors, (78), 30 states have call predecessors, (78), 30 states have return successors, (78), 68 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 05:38:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2442 transitions. [2023-02-18 05:38:14,284 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2442 transitions. Word has length 49 [2023-02-18 05:38:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:14,285 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2442 transitions. [2023-02-18 05:38:14,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2442 transitions. [2023-02-18 05:38:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 05:38:14,286 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:14,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:14,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-18 05:38:14,287 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225816, now seen corresponding path program 1 times [2023-02-18 05:38:14,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143127724] [2023-02-18 05:38:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:14,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:14,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143127724] [2023-02-18 05:38:14,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143127724] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:14,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:14,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-18 05:38:14,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135852482] [2023-02-18 05:38:14,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 05:38:14,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 05:38:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-18 05:38:14,786 INFO L87 Difference]: Start difference. First operand 1927 states and 2442 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:15,606 INFO L93 Difference]: Finished difference Result 2078 states and 2605 transitions. [2023-02-18 05:38:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 05:38:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-02-18 05:38:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:15,610 INFO L225 Difference]: With dead ends: 2078 [2023-02-18 05:38:15,610 INFO L226 Difference]: Without dead ends: 2078 [2023-02-18 05:38:15,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2023-02-18 05:38:15,611 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1204 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:15,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 1012 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:38:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2023-02-18 05:38:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1796. [2023-02-18 05:38:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1664 states have (on average 1.28125) internal successors, (2132), 1699 states have internal predecessors, (2132), 73 states have call successors, (73), 33 states have call predecessors, (73), 33 states have return successors, (73), 63 states have call predecessors, (73), 73 states have call successors, (73) [2023-02-18 05:38:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2278 transitions. [2023-02-18 05:38:15,640 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2278 transitions. Word has length 49 [2023-02-18 05:38:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:15,640 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2278 transitions. [2023-02-18 05:38:15,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2278 transitions. [2023-02-18 05:38:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 05:38:15,642 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:15,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:15,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-18 05:38:15,642 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:15,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1385225817, now seen corresponding path program 1 times [2023-02-18 05:38:15,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817470885] [2023-02-18 05:38:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:16,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:16,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817470885] [2023-02-18 05:38:16,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817470885] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:16,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:16,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-02-18 05:38:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203052723] [2023-02-18 05:38:16,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:16,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 05:38:16,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 05:38:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-02-18 05:38:16,272 INFO L87 Difference]: Start difference. First operand 1796 states and 2278 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:17,322 INFO L93 Difference]: Finished difference Result 2635 states and 3366 transitions. [2023-02-18 05:38:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 05:38:17,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-02-18 05:38:17,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:17,327 INFO L225 Difference]: With dead ends: 2635 [2023-02-18 05:38:17,328 INFO L226 Difference]: Without dead ends: 2635 [2023-02-18 05:38:17,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=482, Invalid=1078, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 05:38:17,329 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 2719 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:17,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2719 Valid, 922 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:38:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2023-02-18 05:38:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2000. [2023-02-18 05:38:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1852 states have (on average 1.2975161987041037) internal successors, (2403), 1891 states have internal predecessors, (2403), 83 states have call successors, (83), 39 states have call predecessors, (83), 39 states have return successors, (83), 69 states have call predecessors, (83), 83 states have call successors, (83) [2023-02-18 05:38:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2569 transitions. [2023-02-18 05:38:17,358 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2569 transitions. Word has length 49 [2023-02-18 05:38:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:17,359 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 2569 transitions. [2023-02-18 05:38:17,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2569 transitions. [2023-02-18 05:38:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 05:38:17,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:17,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:17,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-18 05:38:17,360 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072858, now seen corresponding path program 1 times [2023-02-18 05:38:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:17,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533065684] [2023-02-18 05:38:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:17,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:17,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:17,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533065684] [2023-02-18 05:38:17,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533065684] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:17,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:17,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 05:38:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57273406] [2023-02-18 05:38:17,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:17,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:17,637 INFO L87 Difference]: Start difference. First operand 2000 states and 2569 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:18,232 INFO L93 Difference]: Finished difference Result 2610 states and 3303 transitions. [2023-02-18 05:38:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 05:38:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-02-18 05:38:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:18,237 INFO L225 Difference]: With dead ends: 2610 [2023-02-18 05:38:18,237 INFO L226 Difference]: Without dead ends: 2610 [2023-02-18 05:38:18,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-02-18 05:38:18,238 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 914 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:18,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1016 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 05:38:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2023-02-18 05:38:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2254. [2023-02-18 05:38:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2074 states have (on average 1.2974927675988428) internal successors, (2691), 2133 states have internal predecessors, (2691), 109 states have call successors, (109), 45 states have call predecessors, (109), 45 states have return successors, (109), 75 states have call predecessors, (109), 109 states have call successors, (109) [2023-02-18 05:38:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2909 transitions. [2023-02-18 05:38:18,268 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2909 transitions. Word has length 49 [2023-02-18 05:38:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:18,269 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 2909 transitions. [2023-02-18 05:38:18,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2909 transitions. [2023-02-18 05:38:18,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 05:38:18,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:18,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:18,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-18 05:38:18,271 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:18,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1387072859, now seen corresponding path program 1 times [2023-02-18 05:38:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:18,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639011823] [2023-02-18 05:38:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:18,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639011823] [2023-02-18 05:38:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639011823] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:18,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 05:38:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626661358] [2023-02-18 05:38:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:18,670 INFO L87 Difference]: Start difference. First operand 2254 states and 2909 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:19,221 INFO L93 Difference]: Finished difference Result 2745 states and 3475 transitions. [2023-02-18 05:38:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 05:38:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-02-18 05:38:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:19,228 INFO L225 Difference]: With dead ends: 2745 [2023-02-18 05:38:19,228 INFO L226 Difference]: Without dead ends: 2745 [2023-02-18 05:38:19,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2023-02-18 05:38:19,229 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 947 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:19,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 984 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-02-18 05:38:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2447. [2023-02-18 05:38:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2251 states have (on average 1.3091959129275876) internal successors, (2947), 2314 states have internal predecessors, (2947), 119 states have call successors, (119), 51 states have call predecessors, (119), 51 states have return successors, (119), 81 states have call predecessors, (119), 119 states have call successors, (119) [2023-02-18 05:38:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3185 transitions. [2023-02-18 05:38:19,263 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3185 transitions. Word has length 49 [2023-02-18 05:38:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:19,264 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3185 transitions. [2023-02-18 05:38:19,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3185 transitions. [2023-02-18 05:38:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 05:38:19,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:19,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-18 05:38:19,266 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -7673948, now seen corresponding path program 1 times [2023-02-18 05:38:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965754506] [2023-02-18 05:38:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:19,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:19,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965754506] [2023-02-18 05:38:19,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965754506] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:19,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811199218] [2023-02-18 05:38:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:19,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:19,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:19,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:19,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 05:38:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 05:38:19,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:19,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:19,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811199218] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:19,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:19,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-18 05:38:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807739327] [2023-02-18 05:38:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:19,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:19,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:19,468 INFO L87 Difference]: Start difference. First operand 2447 states and 3185 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:19,489 INFO L93 Difference]: Finished difference Result 2964 states and 3885 transitions. [2023-02-18 05:38:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:19,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-02-18 05:38:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:19,494 INFO L225 Difference]: With dead ends: 2964 [2023-02-18 05:38:19,494 INFO L226 Difference]: Without dead ends: 2964 [2023-02-18 05:38:19,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:19,495 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 195 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:19,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 318 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2023-02-18 05:38:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2870. [2023-02-18 05:38:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2662 states have (on average 1.3260706235912847) internal successors, (3530), 2725 states have internal predecessors, (3530), 131 states have call successors, (131), 51 states have call predecessors, (131), 51 states have return successors, (131), 93 states have call predecessors, (131), 131 states have call successors, (131) [2023-02-18 05:38:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3792 transitions. [2023-02-18 05:38:19,532 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3792 transitions. Word has length 50 [2023-02-18 05:38:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:19,533 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 3792 transitions. [2023-02-18 05:38:19,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3792 transitions. [2023-02-18 05:38:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 05:38:19,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:19,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:19,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:19,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-18 05:38:19,741 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash -384530648, now seen corresponding path program 1 times [2023-02-18 05:38:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:19,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57510023] [2023-02-18 05:38:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:20,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:20,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 05:38:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57510023] [2023-02-18 05:38:20,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57510023] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:20,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:20,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-02-18 05:38:20,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633751677] [2023-02-18 05:38:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:20,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 05:38:20,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:20,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 05:38:20,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 05:38:20,534 INFO L87 Difference]: Start difference. First operand 2870 states and 3792 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:21,964 INFO L93 Difference]: Finished difference Result 2957 states and 3828 transitions. [2023-02-18 05:38:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 05:38:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2023-02-18 05:38:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:21,970 INFO L225 Difference]: With dead ends: 2957 [2023-02-18 05:38:21,970 INFO L226 Difference]: Without dead ends: 2955 [2023-02-18 05:38:21,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 05:38:21,971 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1008 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:21,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 2147 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 05:38:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2023-02-18 05:38:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2831. [2023-02-18 05:38:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2626 states have (on average 1.3236862147753237) internal successors, (3476), 2688 states have internal predecessors, (3476), 129 states have call successors, (129), 50 states have call predecessors, (129), 50 states have return successors, (129), 92 states have call predecessors, (129), 129 states have call successors, (129) [2023-02-18 05:38:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 3734 transitions. [2023-02-18 05:38:22,022 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 3734 transitions. Word has length 51 [2023-02-18 05:38:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:22,022 INFO L495 AbstractCegarLoop]: Abstraction has 2831 states and 3734 transitions. [2023-02-18 05:38:22,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 3734 transitions. [2023-02-18 05:38:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 05:38:22,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:22,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:22,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-18 05:38:22,024 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash -987996839, now seen corresponding path program 1 times [2023-02-18 05:38:22,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:22,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351254188] [2023-02-18 05:38:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:22,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:22,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351254188] [2023-02-18 05:38:22,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351254188] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:22,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:22,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582228270] [2023-02-18 05:38:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:22,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:22,120 INFO L87 Difference]: Start difference. First operand 2831 states and 3734 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:22,141 INFO L93 Difference]: Finished difference Result 3606 states and 4817 transitions. [2023-02-18 05:38:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:22,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-18 05:38:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:22,148 INFO L225 Difference]: With dead ends: 3606 [2023-02-18 05:38:22,148 INFO L226 Difference]: Without dead ends: 3606 [2023-02-18 05:38:22,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:22,149 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 116 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:22,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 532 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2023-02-18 05:38:22,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 2457. [2023-02-18 05:38:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 2276 states have (on average 1.3040421792618628) internal successors, (2968), 2334 states have internal predecessors, (2968), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-18 05:38:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 3196 transitions. [2023-02-18 05:38:22,194 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 3196 transitions. Word has length 51 [2023-02-18 05:38:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:22,194 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 3196 transitions. [2023-02-18 05:38:22,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 3196 transitions. [2023-02-18 05:38:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 05:38:22,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:22,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-18 05:38:22,196 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1781712484, now seen corresponding path program 1 times [2023-02-18 05:38:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:22,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354500288] [2023-02-18 05:38:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:22,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:22,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:22,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354500288] [2023-02-18 05:38:22,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354500288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:22,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022245017] [2023-02-18 05:38:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:22,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:22,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:22,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 05:38:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 05:38:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:22,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-18 05:38:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:22,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022245017] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:22,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:22,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2023-02-18 05:38:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128602137] [2023-02-18 05:38:22,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:22,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 05:38:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 05:38:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:22,521 INFO L87 Difference]: Start difference. First operand 2457 states and 3196 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 05:38:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:22,988 INFO L93 Difference]: Finished difference Result 3641 states and 4757 transitions. [2023-02-18 05:38:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 05:38:22,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2023-02-18 05:38:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:22,995 INFO L225 Difference]: With dead ends: 3641 [2023-02-18 05:38:22,995 INFO L226 Difference]: Without dead ends: 3633 [2023-02-18 05:38:22,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-18 05:38:22,996 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 643 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:22,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1338 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2023-02-18 05:38:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2469. [2023-02-18 05:38:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2288 states have (on average 1.3011363636363635) internal successors, (2977), 2346 states have internal predecessors, (2977), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-18 05:38:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3205 transitions. [2023-02-18 05:38:23,052 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3205 transitions. Word has length 52 [2023-02-18 05:38:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:23,052 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 3205 transitions. [2023-02-18 05:38:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 05:38:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3205 transitions. [2023-02-18 05:38:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 05:38:23,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:23,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:23,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-18 05:38:23,259 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1216726984, now seen corresponding path program 1 times [2023-02-18 05:38:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:23,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111726197] [2023-02-18 05:38:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:23,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:23,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111726197] [2023-02-18 05:38:23,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111726197] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:23,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:23,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-18 05:38:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990847334] [2023-02-18 05:38:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:23,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 05:38:23,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 05:38:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:23,733 INFO L87 Difference]: Start difference. First operand 2469 states and 3205 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:24,379 INFO L93 Difference]: Finished difference Result 2640 states and 3390 transitions. [2023-02-18 05:38:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 05:38:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-02-18 05:38:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:24,383 INFO L225 Difference]: With dead ends: 2640 [2023-02-18 05:38:24,383 INFO L226 Difference]: Without dead ends: 2640 [2023-02-18 05:38:24,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2023-02-18 05:38:24,385 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 996 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:24,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 1105 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2023-02-18 05:38:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2483. [2023-02-18 05:38:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2302 states have (on average 1.3010425716768028) internal successors, (2995), 2360 states have internal predecessors, (2995), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-18 05:38:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3223 transitions. [2023-02-18 05:38:24,419 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3223 transitions. Word has length 52 [2023-02-18 05:38:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:24,419 INFO L495 AbstractCegarLoop]: Abstraction has 2483 states and 3223 transitions. [2023-02-18 05:38:24,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3223 transitions. [2023-02-18 05:38:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 05:38:24,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:24,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:24,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-18 05:38:24,421 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash 407380358, now seen corresponding path program 1 times [2023-02-18 05:38:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:24,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577689529] [2023-02-18 05:38:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:24,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:24,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:24,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577689529] [2023-02-18 05:38:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577689529] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:24,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 05:38:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807641060] [2023-02-18 05:38:24,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:24,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:24,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:24,715 INFO L87 Difference]: Start difference. First operand 2483 states and 3223 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:25,133 INFO L93 Difference]: Finished difference Result 2847 states and 3640 transitions. [2023-02-18 05:38:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 05:38:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-02-18 05:38:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:25,138 INFO L225 Difference]: With dead ends: 2847 [2023-02-18 05:38:25,138 INFO L226 Difference]: Without dead ends: 2847 [2023-02-18 05:38:25,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2023-02-18 05:38:25,139 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 1151 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:25,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 786 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:38:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2023-02-18 05:38:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2470. [2023-02-18 05:38:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2289 states have (on average 1.3010048055919616) internal successors, (2978), 2347 states have internal predecessors, (2978), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-18 05:38:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 3206 transitions. [2023-02-18 05:38:25,173 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 3206 transitions. Word has length 52 [2023-02-18 05:38:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:25,173 INFO L495 AbstractCegarLoop]: Abstraction has 2470 states and 3206 transitions. [2023-02-18 05:38:25,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 3206 transitions. [2023-02-18 05:38:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 05:38:25,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:25,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:25,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-18 05:38:25,175 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -159124908, now seen corresponding path program 1 times [2023-02-18 05:38:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:25,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743534400] [2023-02-18 05:38:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:25,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:25,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 05:38:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:25,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743534400] [2023-02-18 05:38:25,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743534400] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308326208] [2023-02-18 05:38:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:25,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:25,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:25,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:25,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 05:38:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 05:38:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:25,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:25,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308326208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:25,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:25,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-02-18 05:38:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237826003] [2023-02-18 05:38:25,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:25,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:25,550 INFO L87 Difference]: Start difference. First operand 2470 states and 3206 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:25,778 INFO L93 Difference]: Finished difference Result 2878 states and 3677 transitions. [2023-02-18 05:38:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:25,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2023-02-18 05:38:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:25,783 INFO L225 Difference]: With dead ends: 2878 [2023-02-18 05:38:25,784 INFO L226 Difference]: Without dead ends: 2878 [2023-02-18 05:38:25,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-02-18 05:38:25,784 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 533 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:25,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 405 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2023-02-18 05:38:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2468. [2023-02-18 05:38:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2289 states have (on average 1.293141109654871) internal successors, (2960), 2345 states have internal predecessors, (2960), 114 states have call successors, (114), 41 states have call predecessors, (114), 41 states have return successors, (114), 81 states have call predecessors, (114), 114 states have call successors, (114) [2023-02-18 05:38:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3188 transitions. [2023-02-18 05:38:25,819 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3188 transitions. Word has length 53 [2023-02-18 05:38:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:25,820 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 3188 transitions. [2023-02-18 05:38:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3188 transitions. [2023-02-18 05:38:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 05:38:25,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:25,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:25,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:26,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-02-18 05:38:26,027 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-02-18 05:38:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2046489697, now seen corresponding path program 1 times [2023-02-18 05:38:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:26,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445314917] [2023-02-18 05:38:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:26,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 05:38:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:26,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445314917] [2023-02-18 05:38:26,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445314917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846157678] [2023-02-18 05:38:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:26,660 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:38:26,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 05:38:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:26,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-18 05:38:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:26,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:26,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-18 05:38:26,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 05:38:26,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 05:38:26,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 05:38:26,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 05:38:26,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 05:38:26,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 05:38:27,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:27,067 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 1 case distinctions, treesize of input 23 treesize of output 46 [2023-02-18 05:38:27,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:27,074 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 23 treesize of output 46 [2023-02-18 05:38:27,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:27,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:27,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 33 case distinctions, treesize of input 724 treesize of output 955