./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0232-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0232-3.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 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 05:08:28,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 05:08:28,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 05:08:28,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 05:08:28,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 05:08:28,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 05:08:28,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 05:08:28,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 05:08:28,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 05:08:28,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 05:08:28,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 05:08:28,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 05:08:28,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 05:08:28,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 05:08:28,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 05:08:28,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 05:08:28,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 05:08:28,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 05:08:28,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 05:08:28,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 05:08:28,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 05:08:28,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 05:08:28,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 05:08:28,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 05:08:28,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 05:08:28,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 05:08:28,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 05:08:28,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 05:08:28,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 05:08:28,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 05:08:28,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 05:08:28,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 05:08:28,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 05:08:28,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 05:08:28,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 05:08:28,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 05:08:28,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 05:08:28,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 05:08:28,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 05:08:28,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 05:08:28,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 05:08:28,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 05:08:28,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 05:08:28,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 05:08:28,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 05:08:28,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 05:08:28,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 05:08:28,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 05:08:28,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 05:08:28,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 05:08:28,455 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 05:08:28,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 05:08:28,456 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 05:08:28,456 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 05:08:28,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 05:08:28,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 05:08:28,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 05:08:28,457 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 05:08:28,457 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 05:08:28,457 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 05:08:28,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 05:08:28,458 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 05:08:28,458 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 05:08:28,458 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 05:08:28,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 05:08:28,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 05:08:28,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 05:08:28,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:08:28,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 05:08:28,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 05:08:28,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 05:08:28,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 05:08:28,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 05:08:28,460 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 05:08:28,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 05:08:28,461 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 05:08:28,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 [2023-02-18 05:08:28,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 05:08:28,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 05:08:28,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 05:08:28,678 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 05:08:28,678 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 05:08:28,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0232-3.i [2023-02-18 05:08:29,778 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 05:08:29,989 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 05:08:29,991 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0232-3.i [2023-02-18 05:08:30,001 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7d72395c/8e59a076e96648bf93f5752c06985baa/FLAG33b20cc6c [2023-02-18 05:08:30,014 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7d72395c/8e59a076e96648bf93f5752c06985baa [2023-02-18 05:08:30,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 05:08:30,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 05:08:30,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 05:08:30,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 05:08:30,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 05:08:30,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28125c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30, skipping insertion in model container [2023-02-18 05:08:30,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 05:08:30,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 05:08:30,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:08:30,312 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 05:08:30,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:08:30,374 INFO L208 MainTranslator]: Completed translation [2023-02-18 05:08:30,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30 WrapperNode [2023-02-18 05:08:30,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 05:08:30,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 05:08:30,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 05:08:30,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 05:08:30,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,414 INFO L138 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2023-02-18 05:08:30,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 05:08:30,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 05:08:30,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 05:08:30,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 05:08:30,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 05:08:30,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 05:08:30,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 05:08:30,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 05:08:30,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (1/1) ... [2023-02-18 05:08:30,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:08:30,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:08:30,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 05:08:30,520 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 [2023-02-18 05:08:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 05:08:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 05:08:30,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 05:08:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 05:08:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 05:08:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 05:08:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 05:08:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 05:08:30,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 05:08:30,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 05:08:30,677 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 05:08:30,678 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 05:08:31,012 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 05:08:31,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 05:08:31,018 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 05:08:31,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:08:31 BoogieIcfgContainer [2023-02-18 05:08:31,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 05:08:31,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 05:08:31,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 05:08:31,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 05:08:31,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:08:30" (1/3) ... [2023-02-18 05:08:31,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64509cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:08:31, skipping insertion in model container [2023-02-18 05:08:31,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:08:30" (2/3) ... [2023-02-18 05:08:31,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64509cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:08:31, skipping insertion in model container [2023-02-18 05:08:31,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:08:31" (3/3) ... [2023-02-18 05:08:31,027 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232-3.i [2023-02-18 05:08:31,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 05:08:31,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2023-02-18 05:08:31,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 05:08:31,097 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;@3dc66d2a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 05:08:31,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-02-18 05:08:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 51 states have (on average 2.215686274509804) internal successors, (113), 106 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 05:08:31,104 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:31,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 05:08:31,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2023-02-18 05:08:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:31,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042853665] [2023-02-18 05:08:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:31,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:31,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042853665] [2023-02-18 05:08:31,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042853665] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:31,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:31,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:08:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865415205] [2023-02-18 05:08:31,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:31,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:08:31,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:08:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:08:31,457 INFO L87 Difference]: Start difference. First operand has 107 states, 51 states have (on average 2.215686274509804) internal successors, (113), 106 states have internal predecessors, (113), 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) [2023-02-18 05:08:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:31,680 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2023-02-18 05:08:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:08:31,688 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 [2023-02-18 05:08:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:31,695 INFO L225 Difference]: With dead ends: 132 [2023-02-18 05:08:31,695 INFO L226 Difference]: Without dead ends: 130 [2023-02-18 05:08:31,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:08:31,699 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:31,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 81 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:08:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-18 05:08:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2023-02-18 05:08:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 51 states have (on average 2.019607843137255) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2023-02-18 05:08:31,745 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 4 [2023-02-18 05:08:31,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:31,746 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2023-02-18 05:08:31,746 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) [2023-02-18 05:08:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2023-02-18 05:08:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-02-18 05:08:31,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:31,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-02-18 05:08:31,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 05:08:31,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2023-02-18 05:08:31,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:31,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977561536] [2023-02-18 05:08:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:31,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:31,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977561536] [2023-02-18 05:08:31,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977561536] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:31,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:31,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:08:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008862092] [2023-02-18 05:08:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:31,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:08:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:31,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:08:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:08:31,948 INFO L87 Difference]: Start difference. First operand 98 states and 103 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) [2023-02-18 05:08:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:32,087 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2023-02-18 05:08:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:08:32,087 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 [2023-02-18 05:08:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:32,090 INFO L225 Difference]: With dead ends: 120 [2023-02-18 05:08:32,090 INFO L226 Difference]: Without dead ends: 120 [2023-02-18 05:08:32,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:08:32,095 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 187 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:32,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 58 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-18 05:08:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2023-02-18 05:08:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2023-02-18 05:08:32,115 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 4 [2023-02-18 05:08:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:32,116 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2023-02-18 05:08:32,118 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) [2023-02-18 05:08:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2023-02-18 05:08:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-18 05:08:32,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:32,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-18 05:08:32,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 05:08:32,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2023-02-18 05:08:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:32,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440468856] [2023-02-18 05:08:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:32,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440468856] [2023-02-18 05:08:32,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440468856] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:32,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:32,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:08:32,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215913477] [2023-02-18 05:08:32,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:32,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:08:32,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:08:32,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:08:32,156 INFO L87 Difference]: Start difference. First operand 101 states and 110 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) [2023-02-18 05:08:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:32,226 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2023-02-18 05:08:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:08:32,226 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 [2023-02-18 05:08:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:32,227 INFO L225 Difference]: With dead ends: 116 [2023-02-18 05:08:32,227 INFO L226 Difference]: Without dead ends: 116 [2023-02-18 05:08:32,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:08:32,228 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 62 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:32,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 83 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-18 05:08:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2023-02-18 05:08:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 96 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2023-02-18 05:08:32,234 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 5 [2023-02-18 05:08:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:32,234 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2023-02-18 05:08:32,234 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) [2023-02-18 05:08:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2023-02-18 05:08:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-18 05:08:32,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:32,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-18 05:08:32,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 05:08:32,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2023-02-18 05:08:32,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:32,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680216575] [2023-02-18 05:08:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:32,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:32,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:32,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680216575] [2023-02-18 05:08:32,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680216575] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:32,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:32,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:08:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254275909] [2023-02-18 05:08:32,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:08:32,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:08:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:08:32,276 INFO L87 Difference]: Start difference. First operand 97 states and 106 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) [2023-02-18 05:08:32,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:32,318 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2023-02-18 05:08:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:08:32,319 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 [2023-02-18 05:08:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:32,320 INFO L225 Difference]: With dead ends: 94 [2023-02-18 05:08:32,320 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 05:08:32,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:08:32,321 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:32,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 54 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:08:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 05:08:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2023-02-18 05:08:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 59 states have (on average 1.728813559322034) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2023-02-18 05:08:32,326 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 5 [2023-02-18 05:08:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:32,326 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2023-02-18 05:08:32,326 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) [2023-02-18 05:08:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2023-02-18 05:08:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 05:08:32,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:32,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 05:08:32,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2023-02-18 05:08:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338630870] [2023-02-18 05:08:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:32,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:32,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338630870] [2023-02-18 05:08:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338630870] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:32,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:32,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:08:32,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564178249] [2023-02-18 05:08:32,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:32,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:08:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:08:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:08:32,490 INFO L87 Difference]: Start difference. First operand 93 states and 102 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) [2023-02-18 05:08:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:32,605 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2023-02-18 05:08:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 05:08:32,605 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 [2023-02-18 05:08:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:32,606 INFO L225 Difference]: With dead ends: 104 [2023-02-18 05:08:32,606 INFO L226 Difference]: Without dead ends: 104 [2023-02-18 05:08:32,607 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 [2023-02-18 05:08:32,609 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 16 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:32,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 424 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-18 05:08:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2023-02-18 05:08:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2023-02-18 05:08:32,625 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 10 [2023-02-18 05:08:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:32,625 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2023-02-18 05:08:32,625 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) [2023-02-18 05:08:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2023-02-18 05:08:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 05:08:32,626 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:32,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 05:08:32,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:32,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015976, now seen corresponding path program 1 times [2023-02-18 05:08:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:32,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719693944] [2023-02-18 05:08:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719693944] [2023-02-18 05:08:32,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719693944] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:32,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:32,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:08:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291671817] [2023-02-18 05:08:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:08:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:08:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:08:32,806 INFO L87 Difference]: Start difference. First operand 99 states and 108 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) [2023-02-18 05:08:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:32,933 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2023-02-18 05:08:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:08:32,933 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 [2023-02-18 05:08:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:32,934 INFO L225 Difference]: With dead ends: 116 [2023-02-18 05:08:32,934 INFO L226 Difference]: Without dead ends: 116 [2023-02-18 05:08:32,935 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 [2023-02-18 05:08:32,935 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 201 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:32,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 122 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-18 05:08:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2023-02-18 05:08:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.646153846153846) internal successors, (107), 97 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2023-02-18 05:08:32,939 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 18 [2023-02-18 05:08:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:32,940 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2023-02-18 05:08:32,940 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) [2023-02-18 05:08:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2023-02-18 05:08:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 05:08:32,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:32,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 05:08:32,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015977, now seen corresponding path program 1 times [2023-02-18 05:08:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342401180] [2023-02-18 05:08:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:33,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342401180] [2023-02-18 05:08:33,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342401180] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:33,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:33,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:08:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665109099] [2023-02-18 05:08:33,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:33,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:08:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:08:33,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:08:33,107 INFO L87 Difference]: Start difference. First operand 98 states and 107 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) [2023-02-18 05:08:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:33,214 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2023-02-18 05:08:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:08:33,214 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 [2023-02-18 05:08:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:33,215 INFO L225 Difference]: With dead ends: 121 [2023-02-18 05:08:33,215 INFO L226 Difference]: Without dead ends: 121 [2023-02-18 05:08:33,216 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 [2023-02-18 05:08:33,216 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 275 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:33,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 119 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-18 05:08:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2023-02-18 05:08:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 96 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2023-02-18 05:08:33,220 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 18 [2023-02-18 05:08:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:33,220 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2023-02-18 05:08:33,220 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) [2023-02-18 05:08:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2023-02-18 05:08:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 05:08:33,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:33,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:33,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 05:08:33,222 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1257147052, now seen corresponding path program 1 times [2023-02-18 05:08:33,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:33,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496383207] [2023-02-18 05:08:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:33,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:33,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496383207] [2023-02-18 05:08:33,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496383207] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:33,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:33,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:08:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286810665] [2023-02-18 05:08:33,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:33,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:08:33,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:08:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:08:33,315 INFO L87 Difference]: Start difference. First operand 97 states and 106 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) [2023-02-18 05:08:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:33,389 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2023-02-18 05:08:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:08:33,389 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 [2023-02-18 05:08:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:33,390 INFO L225 Difference]: With dead ends: 89 [2023-02-18 05:08:33,390 INFO L226 Difference]: Without dead ends: 89 [2023-02-18 05:08:33,391 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 [2023-02-18 05:08:33,391 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 102 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:33,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-18 05:08:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-18 05:08:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.631578947368421) internal successors, (93), 88 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2023-02-18 05:08:33,394 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 20 [2023-02-18 05:08:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:33,395 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2023-02-18 05:08:33,395 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) [2023-02-18 05:08:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2023-02-18 05:08:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 05:08:33,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:33,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:33,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 05:08:33,396 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:33,397 INFO L85 PathProgramCache]: Analyzing trace with hash -663319494, now seen corresponding path program 1 times [2023-02-18 05:08:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:33,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684074601] [2023-02-18 05:08:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684074601] [2023-02-18 05:08:33,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684074601] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:33,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:33,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:08:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032515153] [2023-02-18 05:08:33,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:33,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:08:33,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:08:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:08:33,460 INFO L87 Difference]: Start difference. First operand 89 states and 93 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) [2023-02-18 05:08:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:33,548 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2023-02-18 05:08:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:08:33,549 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 [2023-02-18 05:08:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:33,550 INFO L225 Difference]: With dead ends: 88 [2023-02-18 05:08:33,550 INFO L226 Difference]: Without dead ends: 88 [2023-02-18 05:08:33,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:08:33,551 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:33,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 189 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-18 05:08:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-02-18 05:08:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-02-18 05:08:33,554 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 21 [2023-02-18 05:08:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:33,554 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-02-18 05:08:33,554 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) [2023-02-18 05:08:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-02-18 05:08:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 05:08:33,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:33,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:33,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 05:08:33,555 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:33,556 INFO L85 PathProgramCache]: Analyzing trace with hash -663319493, now seen corresponding path program 1 times [2023-02-18 05:08:33,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:33,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270501908] [2023-02-18 05:08:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:33,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270501908] [2023-02-18 05:08:33,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270501908] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:33,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:33,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:08:33,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57378935] [2023-02-18 05:08:33,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:08:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:33,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:08:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:08:33,765 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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) [2023-02-18 05:08:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:33,887 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2023-02-18 05:08:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:08:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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 [2023-02-18 05:08:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:33,888 INFO L225 Difference]: With dead ends: 87 [2023-02-18 05:08:33,888 INFO L226 Difference]: Without dead ends: 87 [2023-02-18 05:08:33,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:08:33,889 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 196 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:33,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 152 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:08:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-18 05:08:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-18 05:08:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 86 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2023-02-18 05:08:33,892 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 21 [2023-02-18 05:08:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:33,892 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2023-02-18 05:08:33,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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) [2023-02-18 05:08:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2023-02-18 05:08:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 05:08:33,893 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:33,893 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] [2023-02-18 05:08:33,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 05:08:33,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:33,894 INFO L85 PathProgramCache]: Analyzing trace with hash 911932203, now seen corresponding path program 1 times [2023-02-18 05:08:33,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:33,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125639537] [2023-02-18 05:08:33,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:33,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125639537] [2023-02-18 05:08:34,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125639537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:08:34,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:08:34,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 05:08:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381708431] [2023-02-18 05:08:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:08:34,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 05:08:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:08:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 05:08:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 05:08:34,202 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2023-02-18 05:08:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:08:34,540 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2023-02-18 05:08:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 05:08:34,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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 [2023-02-18 05:08:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:08:34,541 INFO L225 Difference]: With dead ends: 169 [2023-02-18 05:08:34,541 INFO L226 Difference]: Without dead ends: 169 [2023-02-18 05:08:34,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-02-18 05:08:34,542 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 378 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:08:34,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 233 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:08:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-18 05:08:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 101. [2023-02-18 05:08:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 05:08:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2023-02-18 05:08:34,545 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 22 [2023-02-18 05:08:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:08:34,545 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2023-02-18 05:08:34,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2023-02-18 05:08:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2023-02-18 05:08:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 05:08:34,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:08:34,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:08:34,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 05:08:34,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-02-18 05:08:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:08:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2023-02-18 05:08:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:08:34,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533324059] [2023-02-18 05:08:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:08:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:08:34,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:08:34,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533324059] [2023-02-18 05:08:34,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533324059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:08:34,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085798632] [2023-02-18 05:08:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:08:34,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:08:34,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:08:34,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 05:08:34,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 05:08:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:08:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 05:08:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:08:34,978 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 [2023-02-18 05:08:35,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:08:35,005 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 [2023-02-18 05:08:35,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:08:35,090 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 [2023-02-18 05:08:35,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:08:35,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 627 treesize of output 2259