./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0232-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0232-1.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 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 08:16:56,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:16:56,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:16:56,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:16:56,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:16:56,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:16:56,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:16:56,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:16:56,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:16:56,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:16:56,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:16:56,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:16:56,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:16:56,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:16:56,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:16:56,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:16:56,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:16:56,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:16:56,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:16:56,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:16:56,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:16:56,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:16:56,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:16:56,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:16:56,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:16:56,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:16:56,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:16:56,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:16:56,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:16:56,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:16:56,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:16:56,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:16:56,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:16:56,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:16:56,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:16:56,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:16:56,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:16:56,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:16:56,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:16:56,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:16:56,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:16:56,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:16:56,600 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:16:56,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:16:56,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:16:56,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:16:56,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:16:56,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:16:56,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:16:56,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:16:56,602 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:16:56,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:16:56,602 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:16:56,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:16:56,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:16:56,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:16:56,604 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:16:56,604 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:16:56,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:16:56,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:16:56,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:16:56,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:16:56,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:16:56,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:16:56,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:16:56,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:16:56,608 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:16:56,608 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:16:56,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:16:56,608 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:16:56,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2023-02-17 08:16:56,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:16:56,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:16:56,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:16:56,825 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:16:56,825 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:16:56,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-1.i [2023-02-17 08:16:57,788 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:16:57,997 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:16:57,997 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-1.i [2023-02-17 08:16:58,007 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7f5d2b4/b883a0f94c824be19a79d81f52e5888f/FLAGd9d696bc5 [2023-02-17 08:16:58,017 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e7f5d2b4/b883a0f94c824be19a79d81f52e5888f [2023-02-17 08:16:58,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:16:58,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:16:58,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:16:58,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:16:58,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:16:58,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5d34de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58, skipping insertion in model container [2023-02-17 08:16:58,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:16:58,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:16:58,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:16:58,324 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:16:58,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:16:58,376 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:16:58,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58 WrapperNode [2023-02-17 08:16:58,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:16:58,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:16:58,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:16:58,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:16:58,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,428 INFO L138 Inliner]: procedures = 126, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-02-17 08:16:58,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:16:58,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:16:58,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:16:58,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:16:58,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:16:58,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:16:58,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:16:58,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:16:58,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (1/1) ... [2023-02-17 08:16:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:16:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:16:58,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 08:16:58,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:16:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 08:16:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 08:16:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:16:58,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:16:58,630 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:16:58,632 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:16:58,827 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:16:58,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:16:58,834 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 08:16:58,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:16:58 BoogieIcfgContainer [2023-02-17 08:16:58,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:16:58,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:16:58,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:16:58,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:16:58,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:16:58" (1/3) ... [2023-02-17 08:16:58,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6ee1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:16:58, skipping insertion in model container [2023-02-17 08:16:58,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:16:58" (2/3) ... [2023-02-17 08:16:58,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6ee1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:16:58, skipping insertion in model container [2023-02-17 08:16:58,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:16:58" (3/3) ... [2023-02-17 08:16:58,843 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2023-02-17 08:16:58,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:16:58,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-02-17 08:16:58,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:16:58,891 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;@2a14ca4f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:16:58,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-02-17 08:16:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 40 states have (on average 2.175) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 08:16:58,899 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:58,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 08:16:58,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:16:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2023-02-17 08:16:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932772350] [2023-02-17 08:16:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:16:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932772350] [2023-02-17 08:16:59,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932772350] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:16:59,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:16:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:16:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930545730] [2023-02-17 08:16:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:16:59,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:16:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:16:59,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:16:59,223 INFO L87 Difference]: Start difference. First operand has 82 states, 40 states have (on average 2.175) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:59,354 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2023-02-17 08:16:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:16:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-17 08:16:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:59,362 INFO L225 Difference]: With dead ends: 93 [2023-02-17 08:16:59,362 INFO L226 Difference]: Without dead ends: 91 [2023-02-17 08:16:59,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:16:59,365 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 52 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:16:59,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-17 08:16:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2023-02-17 08:16:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2023-02-17 08:16:59,389 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 4 [2023-02-17 08:16:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:59,390 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2023-02-17 08:16:59,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2023-02-17 08:16:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-17 08:16:59,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:59,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-17 08:16:59,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:16:59,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:16:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2023-02-17 08:16:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424616313] [2023-02-17 08:16:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:59,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:16:59,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424616313] [2023-02-17 08:16:59,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424616313] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:16:59,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:16:59,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:16:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541857981] [2023-02-17 08:16:59,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:16:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:16:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:16:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:16:59,534 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:59,695 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2023-02-17 08:16:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:16:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-02-17 08:16:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:59,696 INFO L225 Difference]: With dead ends: 147 [2023-02-17 08:16:59,697 INFO L226 Difference]: Without dead ends: 147 [2023-02-17 08:16:59,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:16:59,699 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 136 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:59,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 92 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:16:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-17 08:16:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 77. [2023-02-17 08:16:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2023-02-17 08:16:59,711 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 4 [2023-02-17 08:16:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:59,711 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2023-02-17 08:16:59,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2023-02-17 08:16:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 08:16:59,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:59,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 08:16:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:16:59,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:16:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2023-02-17 08:16:59,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:59,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816551651] [2023-02-17 08:16:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:59,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:16:59,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816551651] [2023-02-17 08:16:59,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816551651] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:16:59,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:16:59,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:16:59,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141385142] [2023-02-17 08:16:59,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:16:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:16:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:16:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:16:59,750 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:59,797 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-17 08:16:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:16:59,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-17 08:16:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:59,802 INFO L225 Difference]: With dead ends: 83 [2023-02-17 08:16:59,802 INFO L226 Difference]: Without dead ends: 83 [2023-02-17 08:16:59,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:16:59,806 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:59,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:16:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-17 08:16:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2023-02-17 08:16:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-02-17 08:16:59,812 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 5 [2023-02-17 08:16:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:59,812 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-02-17 08:16:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,812 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-02-17 08:16:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-17 08:16:59,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:59,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-17 08:16:59,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:16:59,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:16:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2023-02-17 08:16:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:59,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313197318] [2023-02-17 08:16:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:16:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:16:59,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:16:59,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313197318] [2023-02-17 08:16:59,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313197318] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:16:59,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:16:59,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:16:59,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836026362] [2023-02-17 08:16:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:16:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:16:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:16:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:16:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:16:59,858 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:16:59,903 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-02-17 08:16:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:16:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-17 08:16:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:16:59,904 INFO L225 Difference]: With dead ends: 70 [2023-02-17 08:16:59,905 INFO L226 Difference]: Without dead ends: 70 [2023-02-17 08:16:59,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:16:59,909 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:16:59,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:16:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-17 08:16:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2023-02-17 08:16:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5625) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-02-17 08:16:59,924 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 5 [2023-02-17 08:16:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:16:59,925 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-02-17 08:16:59,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:16:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-02-17 08:16:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 08:16:59,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:16:59,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:16:59,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:16:59,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:16:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:16:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2023-02-17 08:16:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:16:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783151524] [2023-02-17 08:16:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:16:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:16:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:00,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:00,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783151524] [2023-02-17 08:17:00,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783151524] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:00,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:00,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:17:00,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380178158] [2023-02-17 08:17:00,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:00,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:17:00,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:00,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:17:00,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:17:00,112 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:00,195 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-02-17 08:17:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 08:17:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 08:17:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:00,196 INFO L225 Difference]: With dead ends: 79 [2023-02-17 08:17:00,196 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 08:17:00,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:17:00,197 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:00,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 289 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 08:17:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2023-02-17 08:17:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.5) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-02-17 08:17:00,209 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 10 [2023-02-17 08:17:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:00,210 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-02-17 08:17:00,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-02-17 08:17:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 08:17:00,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:00,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:00,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:17:00,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1762075788, now seen corresponding path program 1 times [2023-02-17 08:17:00,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:00,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707675480] [2023-02-17 08:17:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:00,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:00,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:00,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707675480] [2023-02-17 08:17:00,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707675480] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:00,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:00,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458507723] [2023-02-17 08:17:00,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:17:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:00,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:17:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:17:00,310 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:00,360 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2023-02-17 08:17:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:17:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 08:17:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:00,361 INFO L225 Difference]: With dead ends: 83 [2023-02-17 08:17:00,362 INFO L226 Difference]: Without dead ends: 83 [2023-02-17 08:17:00,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:17:00,363 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 211 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:00,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 38 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:17:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-17 08:17:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2023-02-17 08:17:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-02-17 08:17:00,379 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 11 [2023-02-17 08:17:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:00,380 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-02-17 08:17:00,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-02-17 08:17:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 08:17:00,388 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:00,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:00,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 08:17:00,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015976, now seen corresponding path program 1 times [2023-02-17 08:17:00,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:00,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677117058] [2023-02-17 08:17:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:00,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:00,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677117058] [2023-02-17 08:17:00,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677117058] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:00,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:00,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:00,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697950066] [2023-02-17 08:17:00,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:00,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:17:00,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:17:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:17:00,511 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:00,586 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2023-02-17 08:17:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:17:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-17 08:17:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:00,586 INFO L225 Difference]: With dead ends: 79 [2023-02-17 08:17:00,587 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 08:17:00,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:17:00,587 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:00,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 74 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 08:17:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2023-02-17 08:17:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-02-17 08:17:00,592 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 18 [2023-02-17 08:17:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:00,592 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-02-17 08:17:00,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-02-17 08:17:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 08:17:00,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:00,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:00,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 08:17:00,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:00,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015977, now seen corresponding path program 1 times [2023-02-17 08:17:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:00,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272940975] [2023-02-17 08:17:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:00,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:00,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272940975] [2023-02-17 08:17:00,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272940975] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:00,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:00,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:00,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159706954] [2023-02-17 08:17:00,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:00,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:17:00,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:17:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:17:00,756 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:00,822 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-02-17 08:17:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:17:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-17 08:17:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:00,823 INFO L225 Difference]: With dead ends: 81 [2023-02-17 08:17:00,823 INFO L226 Difference]: Without dead ends: 81 [2023-02-17 08:17:00,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:17:00,824 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:00,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 78 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-17 08:17:00,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2023-02-17 08:17:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-02-17 08:17:00,826 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 18 [2023-02-17 08:17:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:00,826 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-02-17 08:17:00,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-02-17 08:17:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 08:17:00,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:00,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:00,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 08:17:00,827 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1245694816, now seen corresponding path program 1 times [2023-02-17 08:17:00,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:00,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472390850] [2023-02-17 08:17:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:00,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:00,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472390850] [2023-02-17 08:17:00,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472390850] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:00,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:00,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:17:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938965384] [2023-02-17 08:17:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:17:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:17:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:00,895 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:00,939 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-02-17 08:17:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:17:00,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-17 08:17:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:00,940 INFO L225 Difference]: With dead ends: 63 [2023-02-17 08:17:00,940 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 08:17:00,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:17:00,941 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:00,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 91 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:17:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 08:17:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-17 08:17:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-02-17 08:17:00,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 20 [2023-02-17 08:17:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:00,943 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-02-17 08:17:00,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-02-17 08:17:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 08:17:00,944 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:00,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:00,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 08:17:00,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -663319495, now seen corresponding path program 1 times [2023-02-17 08:17:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:00,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531038640] [2023-02-17 08:17:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:00,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:01,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531038640] [2023-02-17 08:17:01,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531038640] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:01,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:01,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:17:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943143584] [2023-02-17 08:17:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:01,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:17:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:17:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:01,017 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:01,074 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-02-17 08:17:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:17:01,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-17 08:17:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:01,075 INFO L225 Difference]: With dead ends: 62 [2023-02-17 08:17:01,075 INFO L226 Difference]: Without dead ends: 62 [2023-02-17 08:17:01,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:17:01,076 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:01,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 83 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:17:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-17 08:17:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-17 08:17:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-02-17 08:17:01,078 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 21 [2023-02-17 08:17:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:01,078 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-02-17 08:17:01,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-02-17 08:17:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 08:17:01,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:01,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:01,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 08:17:01,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 911932233, now seen corresponding path program 1 times [2023-02-17 08:17:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079172533] [2023-02-17 08:17:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:01,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:01,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079172533] [2023-02-17 08:17:01,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079172533] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:17:01,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:17:01,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:17:01,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377268504] [2023-02-17 08:17:01,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:17:01,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:17:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:17:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:17:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:17:01,158 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:17:01,220 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2023-02-17 08:17:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:17:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-17 08:17:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:17:01,221 INFO L225 Difference]: With dead ends: 61 [2023-02-17 08:17:01,221 INFO L226 Difference]: Without dead ends: 61 [2023-02-17 08:17:01,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:17:01,222 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:17:01,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 69 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:17:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-17 08:17:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-17 08:17:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.4) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2023-02-17 08:17:01,224 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 22 [2023-02-17 08:17:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:17:01,225 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2023-02-17 08:17:01,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 08:17:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2023-02-17 08:17:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 08:17:01,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:17:01,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:17:01,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 08:17:01,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-02-17 08:17:01,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:17:01,229 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2023-02-17 08:17:01,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:17:01,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723885429] [2023-02-17 08:17:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:01,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:17:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:17:01,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:17:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723885429] [2023-02-17 08:17:01,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723885429] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:17:01,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186458211] [2023-02-17 08:17:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:17:01,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:17:01,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:17:01,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:17:01,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:17:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:17:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 08:17:01,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:17:01,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 08:17:01,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:17:01,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 59 [2023-02-17 08:17:01,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:17:01,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 112 [2023-02-17 08:17:01,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:17:01,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 253 case distinctions, treesize of input 454 treesize of output 2330