./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.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 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 01:38:53,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 01:38:53,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 01:38:53,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 01:38:53,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 01:38:53,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 01:38:53,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 01:38:53,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 01:38:53,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 01:38:53,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 01:38:53,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 01:38:53,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 01:38:53,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 01:38:53,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 01:38:53,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 01:38:53,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 01:38:53,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 01:38:53,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 01:38:53,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 01:38:53,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 01:38:53,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 01:38:53,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 01:38:53,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 01:38:53,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 01:38:53,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 01:38:53,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 01:38:53,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 01:38:53,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 01:38:53,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 01:38:53,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 01:38:53,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 01:38:53,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 01:38:53,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 01:38:53,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 01:38:53,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 01:38:53,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 01:38:53,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 01:38:53,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 01:38:53,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 01:38:53,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 01:38:53,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 01:38:53,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 01:38:53,388 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 01:38:53,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 01:38:53,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 01:38:53,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 01:38:53,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 01:38:53,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 01:38:53,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 01:38:53,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 01:38:53,390 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 01:38:53,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 01:38:53,391 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 01:38:53,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 01:38:53,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 01:38:53,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 01:38:53,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 01:38:53,392 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 01:38:53,392 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 01:38:53,393 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 01:38:53,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 01:38:53,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 01:38:53,393 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 01:38:53,393 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 01:38:53,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 01:38:53,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 01:38:53,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 01:38:53,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:38:53,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 01:38:53,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 01:38:53,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 01:38:53,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 01:38:53,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 01:38:53,395 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 01:38:53,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 01:38:53,396 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 01:38:53,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2023-02-15 01:38:53,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 01:38:53,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 01:38:53,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 01:38:53,654 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 01:38:53,654 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 01:38:53,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-02-15 01:38:54,739 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 01:38:55,017 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 01:38:55,019 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2023-02-15 01:38:55,028 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00ef026a/d60cd47cd3c94cda8f88242c89aed77b/FLAG88089143a [2023-02-15 01:38:55,038 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b00ef026a/d60cd47cd3c94cda8f88242c89aed77b [2023-02-15 01:38:55,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 01:38:55,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 01:38:55,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 01:38:55,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 01:38:55,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 01:38:55,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab9cee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55, skipping insertion in model container [2023-02-15 01:38:55,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 01:38:55,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 01:38:55,350 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-02-15 01:38:55,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:38:55,363 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 01:38:55,413 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2023-02-15 01:38:55,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 01:38:55,440 INFO L208 MainTranslator]: Completed translation [2023-02-15 01:38:55,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55 WrapperNode [2023-02-15 01:38:55,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 01:38:55,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 01:38:55,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 01:38:55,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 01:38:55,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,478 INFO L138 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-02-15 01:38:55,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 01:38:55,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 01:38:55,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 01:38:55,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 01:38:55,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 01:38:55,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 01:38:55,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 01:38:55,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 01:38:55,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (1/1) ... [2023-02-15 01:38:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 01:38:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:38:55,536 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) [2023-02-15 01:38:55,565 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 [2023-02-15 01:38:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 01:38:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 01:38:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-02-15 01:38:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-02-15 01:38:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 01:38:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 01:38:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 01:38:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 01:38:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 01:38:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 01:38:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 01:38:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 01:38:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 01:38:55,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 01:38:55,675 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 01:38:55,677 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 01:38:56,032 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 01:38:56,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 01:38:56,038 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-15 01:38:56,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:38:56 BoogieIcfgContainer [2023-02-15 01:38:56,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 01:38:56,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 01:38:56,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 01:38:56,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 01:38:56,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:38:55" (1/3) ... [2023-02-15 01:38:56,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e438e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:38:56, skipping insertion in model container [2023-02-15 01:38:56,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:38:55" (2/3) ... [2023-02-15 01:38:56,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e438e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:38:56, skipping insertion in model container [2023-02-15 01:38:56,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:38:56" (3/3) ... [2023-02-15 01:38:56,047 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2023-02-15 01:38:56,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 01:38:56,071 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-02-15 01:38:56,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 01:38:56,119 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;@f56c4cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 01:38:56,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-02-15 01:38:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:38:56,136 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:56,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:56,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951417, now seen corresponding path program 1 times [2023-02-15 01:38:56,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:56,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161930031] [2023-02-15 01:38:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:56,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:38:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161930031] [2023-02-15 01:38:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161930031] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:38:56,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:38:56,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:38:56,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280232966] [2023-02-15 01:38:56,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:38:56,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:38:56,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:38:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:38:56,462 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:38:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:56,591 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2023-02-15 01:38:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:38:56,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 01:38:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:56,600 INFO L225 Difference]: With dead ends: 97 [2023-02-15 01:38:56,600 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 01:38:56,602 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 [2023-02-15 01:38:56,606 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:56,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:38:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 01:38:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-02-15 01:38:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2023-02-15 01:38:56,646 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 7 [2023-02-15 01:38:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:56,647 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2023-02-15 01:38:56,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:38:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2023-02-15 01:38:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 01:38:56,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:56,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:56,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 01:38:56,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951418, now seen corresponding path program 1 times [2023-02-15 01:38:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:56,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603431033] [2023-02-15 01:38:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:56,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:38:56,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:56,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603431033] [2023-02-15 01:38:56,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603431033] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:38:56,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:38:56,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 01:38:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031454518] [2023-02-15 01:38:56,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:38:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 01:38:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 01:38:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 01:38:56,760 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:38:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:56,835 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2023-02-15 01:38:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 01:38:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 01:38:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:56,838 INFO L225 Difference]: With dead ends: 92 [2023-02-15 01:38:56,839 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 01:38:56,841 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 [2023-02-15 01:38:56,842 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:56,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:38:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 01:38:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-02-15 01:38:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2023-02-15 01:38:56,853 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 7 [2023-02-15 01:38:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:56,853 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2023-02-15 01:38:56,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 01:38:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2023-02-15 01:38:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 01:38:56,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:56,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:56,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 01:38:56,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390976, now seen corresponding path program 1 times [2023-02-15 01:38:56,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:56,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658937029] [2023-02-15 01:38:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:56,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:56,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:38:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:38:57,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:57,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658937029] [2023-02-15 01:38:57,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658937029] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:38:57,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:38:57,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:38:57,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334936386] [2023-02-15 01:38:57,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:38:57,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:38:57,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:38:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:38:57,042 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:38:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:57,235 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2023-02-15 01:38:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:38:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 01:38:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:57,241 INFO L225 Difference]: With dead ends: 96 [2023-02-15 01:38:57,241 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 01:38:57,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:38:57,247 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:57,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 369 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:38:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 01:38:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-02-15 01:38:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2023-02-15 01:38:57,260 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 13 [2023-02-15 01:38:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:57,260 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2023-02-15 01:38:57,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:38:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2023-02-15 01:38:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 01:38:57,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:57,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:57,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 01:38:57,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390975, now seen corresponding path program 1 times [2023-02-15 01:38:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351835157] [2023-02-15 01:38:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:38:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:38:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351835157] [2023-02-15 01:38:57,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351835157] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:38:57,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:38:57,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:38:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789986661] [2023-02-15 01:38:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:38:57,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:38:57,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:38:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:38:57,485 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:38:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:57,682 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2023-02-15 01:38:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:38:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-15 01:38:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:57,684 INFO L225 Difference]: With dead ends: 95 [2023-02-15 01:38:57,684 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 01:38:57,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:38:57,689 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:57,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 385 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 01:38:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 01:38:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2023-02-15 01:38:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2023-02-15 01:38:57,700 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 13 [2023-02-15 01:38:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:57,701 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2023-02-15 01:38:57,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:38:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2023-02-15 01:38:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 01:38:57,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:57,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:57,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 01:38:57,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2068593344, now seen corresponding path program 1 times [2023-02-15 01:38:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:57,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625543575] [2023-02-15 01:38:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 01:38:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:38:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:57,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625543575] [2023-02-15 01:38:57,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625543575] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:38:57,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:38:57,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:38:57,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033250738] [2023-02-15 01:38:57,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:38:57,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:38:57,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:38:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:38:57,799 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:38:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:57,879 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-02-15 01:38:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:38:57,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-15 01:38:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:57,882 INFO L225 Difference]: With dead ends: 96 [2023-02-15 01:38:57,882 INFO L226 Difference]: Without dead ends: 96 [2023-02-15 01:38:57,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:38:57,883 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:57,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:38:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-15 01:38:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-02-15 01:38:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2023-02-15 01:38:57,900 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 15 [2023-02-15 01:38:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:57,900 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2023-02-15 01:38:57,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 01:38:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2023-02-15 01:38:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 01:38:57,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:57,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:57,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 01:38:57,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1769802942, now seen corresponding path program 1 times [2023-02-15 01:38:57,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:57,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772345612] [2023-02-15 01:38:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:57,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:38:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:57,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 01:38:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:38:58,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772345612] [2023-02-15 01:38:58,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772345612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:38:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957202397] [2023-02-15 01:38:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:58,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:38:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:38:58,009 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) [2023-02-15 01:38:58,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 01:38:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:58,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 01:38:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:38:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 01:38:58,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:38:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:38:58,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957202397] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 01:38:58,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 01:38:58,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-02-15 01:38:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416427260] [2023-02-15 01:38:58,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 01:38:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 01:38:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 01:38:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:38:58,260 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 01:38:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:58,330 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2023-02-15 01:38:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:38:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-02-15 01:38:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:58,331 INFO L225 Difference]: With dead ends: 97 [2023-02-15 01:38:58,331 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 01:38:58,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:38:58,332 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:58,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 323 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:38:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 01:38:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-15 01:38:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:38:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2023-02-15 01:38:58,336 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 28 [2023-02-15 01:38:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:58,337 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2023-02-15 01:38:58,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 01:38:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2023-02-15 01:38:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 01:38:58,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:58,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:58,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 01:38:58,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 01:38:58,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash -888530816, now seen corresponding path program 2 times [2023-02-15 01:38:58,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:58,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684116068] [2023-02-15 01:38:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:58,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:58,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:38:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:58,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:38:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:58,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:38:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 01:38:58,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:58,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684116068] [2023-02-15 01:38:58,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684116068] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:38:58,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:38:58,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:38:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54154250] [2023-02-15 01:38:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:38:58,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:38:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:38:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:38:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:38:58,978 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:38:59,112 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2023-02-15 01:38:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:38:59,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-02-15 01:38:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:38:59,114 INFO L225 Difference]: With dead ends: 105 [2023-02-15 01:38:59,114 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 01:38:59,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:38:59,115 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 146 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:38:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 168 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:38:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 01:38:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2023-02-15 01:38:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 88 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:38:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-02-15 01:38:59,119 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 41 [2023-02-15 01:38:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:38:59,122 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-02-15 01:38:59,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:38:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-02-15 01:38:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 01:38:59,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:38:59,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:38:59,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 01:38:59,126 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:38:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:38:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash -888530815, now seen corresponding path program 1 times [2023-02-15 01:38:59,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:38:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770624217] [2023-02-15 01:38:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:38:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:59,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:38:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:59,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:38:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:38:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 01:38:59,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:38:59,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770624217] [2023-02-15 01:38:59,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770624217] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:38:59,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013025722] [2023-02-15 01:38:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:38:59,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:38:59,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:38:59,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:38:59,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 01:38:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:38:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 01:38:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:38:59,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 01:38:59,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:38:59,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_452 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_452))))) is different from true [2023-02-15 01:38:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:38:59,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:39:00,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:39:00,018 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_453 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_453) |c_#length|)))) is different from true [2023-02-15 01:39:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:00,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:39:00,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-15 01:39:00,116 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_454 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_454) |c_#length|)))) is different from true [2023-02-15 01:39:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:00,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-02-15 01:39:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 18 not checked. [2023-02-15 01:39:00,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 01:39:00,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013025722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:39:00,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 01:39:00,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-15 01:39:00,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016458973] [2023-02-15 01:39:00,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 01:39:00,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 01:39:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 01:39:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=104, Unknown=3, NotChecked=66, Total=210 [2023-02-15 01:39:00,250 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 01:39:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:00,453 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2023-02-15 01:39:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 01:39:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-02-15 01:39:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:00,455 INFO L225 Difference]: With dead ends: 101 [2023-02-15 01:39:00,455 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 01:39:00,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=138, Unknown=3, NotChecked=78, Total=272 [2023-02-15 01:39:00,456 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 167 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:00,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 124 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 264 Unchecked, 0.1s Time] [2023-02-15 01:39:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 01:39:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2023-02-15 01:39:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.55) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-02-15 01:39:00,459 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 41 [2023-02-15 01:39:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:00,459 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-02-15 01:39:00,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 01:39:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-02-15 01:39:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:39:00,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:00,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:00,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 01:39:00,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 01:39:00,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash -338093919, now seen corresponding path program 1 times [2023-02-15 01:39:00,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:00,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976026430] [2023-02-15 01:39:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:01,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:01,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 01:39:01,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976026430] [2023-02-15 01:39:01,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976026430] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:39:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654130679] [2023-02-15 01:39:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:39:01,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:39:01,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 01:39:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 01:39:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:39:01,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-02-15 01:39:01,679 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_614 (Array Int Int)) (|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_614)))) is different from true [2023-02-15 01:39:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:01,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 01:39:01,723 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-02-15 01:39:01,724 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 23 treesize of output 24 [2023-02-15 01:39:01,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 01:39:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 01:39:01,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:39:01,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654130679] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:01,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:39:01,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 24 [2023-02-15 01:39:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253130783] [2023-02-15 01:39:01,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:39:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:39:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=483, Unknown=1, NotChecked=44, Total=600 [2023-02-15 01:39:01,758 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:02,263 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2023-02-15 01:39:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 01:39:02,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-02-15 01:39:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:02,265 INFO L225 Difference]: With dead ends: 158 [2023-02-15 01:39:02,265 INFO L226 Difference]: Without dead ends: 158 [2023-02-15 01:39:02,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=716, Unknown=1, NotChecked=56, Total=930 [2023-02-15 01:39:02,266 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 504 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:02,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 343 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 393 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2023-02-15 01:39:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-15 01:39:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 91. [2023-02-15 01:39:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.564516129032258) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2023-02-15 01:39:02,269 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 44 [2023-02-15 01:39:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:02,269 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2023-02-15 01:39:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2023-02-15 01:39:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 01:39:02,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:02,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:02,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 01:39:02,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:02,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash -338093918, now seen corresponding path program 1 times [2023-02-15 01:39:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:02,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438852005] [2023-02-15 01:39:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:02,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:03,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 01:39:03,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438852005] [2023-02-15 01:39:03,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438852005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:39:03,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442298004] [2023-02-15 01:39:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:03,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:39:03,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:39:03,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 01:39:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 01:39:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:39:03,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-02-15 01:39:03,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-02-15 01:39:03,892 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_773 (Array Int Int)) (v_ArrVal_772 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_772)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_773)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-02-15 01:39:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:03,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-02-15 01:39:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:03,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-02-15 01:39:03,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:03,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-02-15 01:39:03,963 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-02-15 01:39:03,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-02-15 01:39:04,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-02-15 01:39:04,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-02-15 01:39:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 01:39:04,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:39:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442298004] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:04,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:39:04,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 27 [2023-02-15 01:39:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448833043] [2023-02-15 01:39:04,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 01:39:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 01:39:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=630, Unknown=1, NotChecked=50, Total=756 [2023-02-15 01:39:04,072 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:04,639 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2023-02-15 01:39:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 01:39:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-02-15 01:39:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:04,640 INFO L225 Difference]: With dead ends: 147 [2023-02-15 01:39:04,640 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 01:39:04,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=999, Unknown=1, NotChecked=64, Total=1190 [2023-02-15 01:39:04,642 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 227 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:04,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 378 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 432 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2023-02-15 01:39:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 01:39:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2023-02-15 01:39:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-02-15 01:39:04,645 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 44 [2023-02-15 01:39:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:04,645 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-02-15 01:39:04,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-02-15 01:39:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 01:39:04,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:04,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 01:39:04,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:04,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1890978520, now seen corresponding path program 1 times [2023-02-15 01:39:04,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392781258] [2023-02-15 01:39:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:04,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:04,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:04,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 01:39:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:04,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392781258] [2023-02-15 01:39:04,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392781258] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:04,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:39:04,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:39:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821308085] [2023-02-15 01:39:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:39:04,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:39:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:39:04,956 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:05,019 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2023-02-15 01:39:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:39:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-15 01:39:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:05,022 INFO L225 Difference]: With dead ends: 143 [2023-02-15 01:39:05,022 INFO L226 Difference]: Without dead ends: 143 [2023-02-15 01:39:05,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 01:39:05,022 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 58 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:05,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 211 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:39:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-15 01:39:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 92. [2023-02-15 01:39:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 87 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2023-02-15 01:39:05,026 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 45 [2023-02-15 01:39:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:05,027 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2023-02-15 01:39:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2023-02-15 01:39:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 01:39:05,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:05,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:05,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 01:39:05,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213013, now seen corresponding path program 1 times [2023-02-15 01:39:05,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:05,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172906327] [2023-02-15 01:39:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 01:39:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172906327] [2023-02-15 01:39:05,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172906327] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:05,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:39:05,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:39:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607972636] [2023-02-15 01:39:05,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:05,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:39:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:39:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:39:05,158 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:05,285 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2023-02-15 01:39:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:39:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-02-15 01:39:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:05,286 INFO L225 Difference]: With dead ends: 103 [2023-02-15 01:39:05,286 INFO L226 Difference]: Without dead ends: 103 [2023-02-15 01:39:05,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:39:05,287 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 64 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:05,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 263 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:39:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-15 01:39:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2023-02-15 01:39:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-02-15 01:39:05,290 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 46 [2023-02-15 01:39:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:05,290 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-02-15 01:39:05,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-02-15 01:39:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 01:39:05,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:05,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 01:39:05,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213014, now seen corresponding path program 1 times [2023-02-15 01:39:05,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:05,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051822133] [2023-02-15 01:39:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 01:39:05,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051822133] [2023-02-15 01:39:05,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051822133] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:39:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020545981] [2023-02-15 01:39:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:39:05,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:39:05,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 01:39:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:05,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 01:39:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:39:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 01:39:05,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:39:05,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020545981] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:05,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:39:05,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-02-15 01:39:05,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476163201] [2023-02-15 01:39:05,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:05,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 01:39:05,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 01:39:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:39:05,712 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:05,727 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2023-02-15 01:39:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 01:39:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-02-15 01:39:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:05,728 INFO L225 Difference]: With dead ends: 90 [2023-02-15 01:39:05,728 INFO L226 Difference]: Without dead ends: 90 [2023-02-15 01:39:05,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:39:05,728 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 76 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:05,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 171 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:39:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-15 01:39:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-02-15 01:39:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-02-15 01:39:05,731 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 46 [2023-02-15 01:39:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:05,732 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-02-15 01:39:05,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-02-15 01:39:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 01:39:05,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:05,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:05,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 01:39:05,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 01:39:05,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash -457619027, now seen corresponding path program 1 times [2023-02-15 01:39:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276372863] [2023-02-15 01:39:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:05,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 01:39:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:06,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276372863] [2023-02-15 01:39:06,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276372863] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:39:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579261217] [2023-02-15 01:39:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:39:06,120 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:39:06,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 01:39:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 01:39:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:39:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 01:39:06,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 01:39:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579261217] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:06,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 01:39:06,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-02-15 01:39:06,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879882688] [2023-02-15 01:39:06,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:39:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:39:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:39:06,341 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:06,383 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-02-15 01:39:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 01:39:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2023-02-15 01:39:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:06,384 INFO L225 Difference]: With dead ends: 87 [2023-02-15 01:39:06,384 INFO L226 Difference]: Without dead ends: 87 [2023-02-15 01:39:06,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 01:39:06,385 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 193 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:06,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 113 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 01:39:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-15 01:39:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-02-15 01:39:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 82 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2023-02-15 01:39:06,388 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 47 [2023-02-15 01:39:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:06,388 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2023-02-15 01:39:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 01:39:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2023-02-15 01:39:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 01:39:06,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:06,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:06,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 01:39:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:06,595 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289572, now seen corresponding path program 1 times [2023-02-15 01:39:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913574768] [2023-02-15 01:39:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 01:39:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913574768] [2023-02-15 01:39:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913574768] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:06,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:39:06,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:39:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658885678] [2023-02-15 01:39:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:39:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:39:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:39:06,708 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:06,783 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-02-15 01:39:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:39:06,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-15 01:39:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:06,784 INFO L225 Difference]: With dead ends: 98 [2023-02-15 01:39:06,784 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 01:39:06,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:39:06,785 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:06,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 172 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:39:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 01:39:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2023-02-15 01:39:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.459016393442623) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-02-15 01:39:06,788 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 48 [2023-02-15 01:39:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:06,788 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-02-15 01:39:06,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-02-15 01:39:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 01:39:06,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:06,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 01:39:06,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289571, now seen corresponding path program 1 times [2023-02-15 01:39:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:06,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624816954] [2023-02-15 01:39:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-15 01:39:06,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624816954] [2023-02-15 01:39:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624816954] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:06,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:39:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 01:39:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670946886] [2023-02-15 01:39:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:06,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 01:39:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 01:39:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 01:39:06,906 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:06,986 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2023-02-15 01:39:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 01:39:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-15 01:39:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:06,987 INFO L225 Difference]: With dead ends: 85 [2023-02-15 01:39:06,987 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 01:39:06,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 01:39:06,988 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 59 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:06,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:39:06,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 01:39:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-15 01:39:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2023-02-15 01:39:06,991 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 48 [2023-02-15 01:39:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:06,991 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2023-02-15 01:39:06,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2023-02-15 01:39:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-15 01:39:06,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:06,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 01:39:06,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:06,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271038, now seen corresponding path program 1 times [2023-02-15 01:39:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083355005] [2023-02-15 01:39:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:07,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:07,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 01:39:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:07,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083355005] [2023-02-15 01:39:07,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083355005] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 01:39:07,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 01:39:07,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 01:39:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076718447] [2023-02-15 01:39:07,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 01:39:07,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 01:39:07,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 01:39:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 01:39:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 01:39:07,221 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 01:39:07,338 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2023-02-15 01:39:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 01:39:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-15 01:39:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 01:39:07,339 INFO L225 Difference]: With dead ends: 84 [2023-02-15 01:39:07,339 INFO L226 Difference]: Without dead ends: 84 [2023-02-15 01:39:07,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 01:39:07,339 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 01:39:07,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 262 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 01:39:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-15 01:39:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-15 01:39:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 79 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 01:39:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2023-02-15 01:39:07,342 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 49 [2023-02-15 01:39:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 01:39:07,342 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2023-02-15 01:39:07,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 01:39:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2023-02-15 01:39:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 01:39:07,342 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 01:39:07,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 01:39:07,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 01:39:07,343 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-02-15 01:39:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 01:39:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1171904341, now seen corresponding path program 1 times [2023-02-15 01:39:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 01:39:07,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348281306] [2023-02-15 01:39:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:07,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 01:39:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:08,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 01:39:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 01:39:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 01:39:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 01:39:08,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 01:39:08,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348281306] [2023-02-15 01:39:08,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348281306] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 01:39:08,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000790211] [2023-02-15 01:39:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 01:39:08,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 01:39:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 01:39:08,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 01:39:08,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 01:39:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 01:39:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 01:39:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 01:39:08,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-02-15 01:39:08,909 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1774 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1774) |c_#memory_$Pointer$.base|)) (not (= |c_node_create_~temp~0#1.base| 0))) is different from true [2023-02-15 01:39:08,953 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1775 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_1775) |c_#memory_$Pointer$.base|)) (not (= |c_node_create_#res#1.base| 0))) is different from true [2023-02-15 01:39:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-02-15 01:39:09,284 INFO L321 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2023-02-15 01:39:09,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 63 [2023-02-15 01:39:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 01:39:11,858 INFO L321 Elim1Store]: treesize reduction 108, result has 61.8 percent of original size [2023-02-15 01:39:11,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 106 treesize of output 268 [2023-02-15 01:39:15,104 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 01:39:16,247 WARN L207 Elim1Store]: Array PQE input equivalent to false