./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.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 99f794c04b6feffb38c1e5c415a278bf34dda5287d389b184a9a7d818ab0b70e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:17:28,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:17:28,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:17:28,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:17:28,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:17:28,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:17:28,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:17:28,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:17:28,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:17:28,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:17:28,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:17:28,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:17:28,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:17:28,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:17:28,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:17:28,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:17:28,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:17:28,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:17:28,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:17:28,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:17:28,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:17:28,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:17:28,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:17:28,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:17:28,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:17:28,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:17:28,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:17:28,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:17:28,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:17:28,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:17:28,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:17:28,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:17:28,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:17:28,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:17:28,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:17:28,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:17:28,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:17:28,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:17:28,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:17:28,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:17:28,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:17:28,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:17:28,565 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:17:28,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:17:28,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:17:28,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:17:28,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:17:28,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:17:28,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:17:28,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:17:28,568 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:17:28,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:17:28,569 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:17:28,570 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:17:28,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:17:28,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:17:28,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:17:28,570 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:17:28,571 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:17:28,571 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:17:28,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:17:28,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:17:28,571 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:17:28,572 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:17:28,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:17:28,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:17:28,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:17:28,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:17:28,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:17:28,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:17:28,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:17:28,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:17:28,573 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:17:28,574 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:17:28,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:17:28,574 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:17:28,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f794c04b6feffb38c1e5c415a278bf34dda5287d389b184a9a7d818ab0b70e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:17:28,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:17:28,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:17:28,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:17:28,892 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:17:28,892 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:17:28,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-08-29 21:17:30,179 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:17:30,499 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:17:30,499 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-08-29 21:17:30,519 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95637f234/dee03974ac96497493107ebeb3487a5a/FLAGc15c7ec0c [2023-08-29 21:17:30,541 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95637f234/dee03974ac96497493107ebeb3487a5a [2023-08-29 21:17:30,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:17:30,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:17:30,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:17:30,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:17:30,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:17:30,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:17:30" (1/1) ... [2023-08-29 21:17:30,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d31377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:30, skipping insertion in model container [2023-08-29 21:17:30,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:17:30" (1/1) ... [2023-08-29 21:17:30,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:17:30,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:17:31,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:17:31,036 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:17:31,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:17:31,183 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:17:31,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31 WrapperNode [2023-08-29 21:17:31,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:17:31,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:17:31,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:17:31,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:17:31,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,243 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2023-08-29 21:17:31,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:17:31,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:17:31,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:17:31,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:17:31,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:17:31,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:17:31,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:17:31,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:17:31,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (1/1) ... [2023-08-29 21:17:31,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:17:31,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:31,313 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) [2023-08-29 21:17:31,344 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 [2023-08-29 21:17:31,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:17:31,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:17:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:17:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:17:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:17:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:17:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:17:31,362 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:17:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:17:31,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:17:31,365 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:17:31,544 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:17:31,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:17:31,692 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:17:31,698 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:17:31,698 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-29 21:17:31,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:17:31 BoogieIcfgContainer [2023-08-29 21:17:31,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:17:31,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:17:31,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:17:31,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:17:31,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:17:30" (1/3) ... [2023-08-29 21:17:31,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e7c33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:17:31, skipping insertion in model container [2023-08-29 21:17:31,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:17:31" (2/3) ... [2023-08-29 21:17:31,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e7c33f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:17:31, skipping insertion in model container [2023-08-29 21:17:31,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:17:31" (3/3) ... [2023-08-29 21:17:31,724 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_06-tricky_address1.i [2023-08-29 21:17:31,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:17:31,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-29 21:17:31,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:17:31,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:17:31,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 84 transitions, 173 flow [2023-08-29 21:17:31,883 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-29 21:17:31,884 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-29 21:17:31,888 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 84 transitions, 173 flow [2023-08-29 21:17:31,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 83 transitions, 169 flow [2023-08-29 21:17:31,894 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:17:31,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-29 21:17:31,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 83 transitions, 169 flow [2023-08-29 21:17:31,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 83 transitions, 169 flow [2023-08-29 21:17:31,919 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-08-29 21:17:31,919 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:31,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 83 events. 4/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 95 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-29 21:17:31,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 1144 [2023-08-29 21:17:34,111 INFO L134 LiptonReduction]: Checked pairs total: 2039 [2023-08-29 21:17:34,111 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-29 21:17:34,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:17:34,136 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;@652fc5e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:17:34,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-29 21:17:34,140 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-29 21:17:34,140 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:34,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:34,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:17:34,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:34,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:34,149 INFO L85 PathProgramCache]: Analyzing trace with hash 10123, now seen corresponding path program 1 times [2023-08-29 21:17:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:34,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687124082] [2023-08-29 21:17:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:34,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:34,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687124082] [2023-08-29 21:17:34,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687124082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:34,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:17:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763045542] [2023-08-29 21:17:34,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:34,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 21:17:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 21:17:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 21:17:34,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-29 21:17:34,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 51 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:34,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-29 21:17:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:34,403 INFO L130 PetriNetUnfolder]: 41/99 cut-off events. [2023-08-29 21:17:34,404 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 99 events. 41/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 374 event pairs, 40 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 188. Up to 98 conditions per place. [2023-08-29 21:17:34,408 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 17 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-29 21:17:34,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 75 flow [2023-08-29 21:17:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 21:17:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 21:17:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 182 transitions. [2023-08-29 21:17:34,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-08-29 21:17:34,422 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 182 transitions. [2023-08-29 21:17:34,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 182 transitions. [2023-08-29 21:17:34,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:34,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 182 transitions. [2023-08-29 21:17:34,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,441 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 51 flow. Second operand 2 states and 182 transitions. [2023-08-29 21:17:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 75 flow [2023-08-29 21:17:34,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:34,445 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 40 flow [2023-08-29 21:17:34,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2023-08-29 21:17:34,450 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-29 21:17:34,450 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 40 flow [2023-08-29 21:17:34,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:34,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 21:17:34,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:17:34,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:34,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash 9734106, now seen corresponding path program 1 times [2023-08-29 21:17:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:34,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750316077] [2023-08-29 21:17:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:34,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750316077] [2023-08-29 21:17:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750316077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:34,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:34,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829690919] [2023-08-29 21:17:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:17:34,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:17:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:17:34,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-08-29 21:17:34,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:34,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-08-29 21:17:34,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:34,613 INFO L130 PetriNetUnfolder]: 41/100 cut-off events. [2023-08-29 21:17:34,613 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:34,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 100 events. 41/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 370 event pairs, 40 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 200. Up to 98 conditions per place. [2023-08-29 21:17:34,614 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-29 21:17:34,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 78 flow [2023-08-29 21:17:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:17:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:17:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-29 21:17:34,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-29 21:17:34,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-29 21:17:34,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-29 21:17:34,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:34,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-29 21:17:34,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,620 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 40 flow. Second operand 3 states and 247 transitions. [2023-08-29 21:17:34,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 78 flow [2023-08-29 21:17:34,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:17:34,621 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 52 flow [2023-08-29 21:17:34,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2023-08-29 21:17:34,622 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2023-08-29 21:17:34,622 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 52 flow [2023-08-29 21:17:34,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:34,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:17:34,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:17:34,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:34,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash 301090086, now seen corresponding path program 1 times [2023-08-29 21:17:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:34,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671006747] [2023-08-29 21:17:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:34,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:34,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671006747] [2023-08-29 21:17:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671006747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:34,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582889937] [2023-08-29 21:17:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:34,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:34,737 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) [2023-08-29 21:17:34,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:17:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 21:17:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:34,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582889937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:34,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:34,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 21:17:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884041501] [2023-08-29 21:17:34,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:17:34,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:17:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:17:34,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 169 [2023-08-29 21:17:34,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:34,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 169 [2023-08-29 21:17:34,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:34,968 INFO L130 PetriNetUnfolder]: 41/103 cut-off events. [2023-08-29 21:17:34,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:17:34,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 103 events. 41/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 371 event pairs, 40 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 214. Up to 98 conditions per place. [2023-08-29 21:17:34,970 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2023-08-29 21:17:34,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 106 flow [2023-08-29 21:17:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:17:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:17:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2023-08-29 21:17:34,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46745562130177515 [2023-08-29 21:17:34,974 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2023-08-29 21:17:34,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2023-08-29 21:17:34,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:34,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2023-08-29 21:17:34,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,979 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,980 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 6 states and 474 transitions. [2023-08-29 21:17:34,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 106 flow [2023-08-29 21:17:34,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:34,981 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 84 flow [2023-08-29 21:17:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-29 21:17:34,982 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-29 21:17:34,982 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 84 flow [2023-08-29 21:17:34,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:34,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:34,983 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-29 21:17:34,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 21:17:35,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:35,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:35,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1220508378, now seen corresponding path program 2 times [2023-08-29 21:17:35,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:35,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521211463] [2023-08-29 21:17:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:35,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:35,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:35,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521211463] [2023-08-29 21:17:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521211463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731038009] [2023-08-29 21:17:35,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 21:17:35,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:35,360 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) [2023-08-29 21:17:35,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:17:35,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-29 21:17:35,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 21:17:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 21:17:35,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 21:17:35,522 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 [2023-08-29 21:17:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-29 21:17:35,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-29 21:17:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731038009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:35,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-29 21:17:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-29 21:17:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873839111] [2023-08-29 21:17:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:35,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:17:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:17:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:17:35,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-29 21:17:35,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:35,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:35,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-29 21:17:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:35,648 INFO L130 PetriNetUnfolder]: 33/86 cut-off events. [2023-08-29 21:17:35,648 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:17:35,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 86 events. 33/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 290 event pairs, 32 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 190. Up to 84 conditions per place. [2023-08-29 21:17:35,649 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-29 21:17:35,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 122 flow [2023-08-29 21:17:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:17:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:17:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-29 21:17:35,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49506903353057197 [2023-08-29 21:17:35,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-29 21:17:35,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-29 21:17:35,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:35,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-29 21:17:35,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:35,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:35,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:35,654 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 84 flow. Second operand 3 states and 251 transitions. [2023-08-29 21:17:35,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 122 flow [2023-08-29 21:17:35,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 108 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:35,655 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 70 flow [2023-08-29 21:17:35,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-29 21:17:35,656 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-29 21:17:35,656 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 70 flow [2023-08-29 21:17:35,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:35,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:35,657 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-29 21:17:35,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 21:17:35,861 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,SelfDestructingSolverStorable3 [2023-08-29 21:17:35,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:35,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1220508367, now seen corresponding path program 1 times [2023-08-29 21:17:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681796427] [2023-08-29 21:17:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:35,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:35,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681796427] [2023-08-29 21:17:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681796427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:17:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009340463] [2023-08-29 21:17:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:35,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:35,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:17:35,989 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) [2023-08-29 21:17:36,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:17:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-29 21:17:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:17:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:36,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:17:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:17:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009340463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:17:36,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:17:36,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-29 21:17:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329823198] [2023-08-29 21:17:36,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:17:36,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 21:17:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 21:17:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-29 21:17:36,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 169 [2023-08-29 21:17:36,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 70 flow. Second operand has 13 states, 13 states have (on average 76.23076923076923) internal successors, (991), 13 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:36,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 169 [2023-08-29 21:17:36,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:36,202 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2023-08-29 21:17:36,202 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-29 21:17:36,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 92 events. 33/92 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 290 event pairs, 32 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 208. Up to 81 conditions per place. [2023-08-29 21:17:36,203 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 11 changer transitions 0/28 dead transitions. [2023-08-29 21:17:36,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 158 flow [2023-08-29 21:17:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 21:17:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 21:17:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 932 transitions. [2023-08-29 21:17:36,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45956607495069035 [2023-08-29 21:17:36,206 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 932 transitions. [2023-08-29 21:17:36,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 932 transitions. [2023-08-29 21:17:36,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:36,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 932 transitions. [2023-08-29 21:17:36,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 77.66666666666667) internal successors, (932), 12 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,212 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,212 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 70 flow. Second operand 12 states and 932 transitions. [2023-08-29 21:17:36,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 158 flow [2023-08-29 21:17:36,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 28 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:17:36,214 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 153 flow [2023-08-29 21:17:36,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=153, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2023-08-29 21:17:36,214 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2023-08-29 21:17:36,215 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 153 flow [2023-08-29 21:17:36,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.23076923076923) internal successors, (991), 13 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:36,215 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-29 21:17:36,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 21:17:36,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:17:36,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:36,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1603332273, now seen corresponding path program 2 times [2023-08-29 21:17:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:36,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876380082] [2023-08-29 21:17:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:36,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:36,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:36,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876380082] [2023-08-29 21:17:36,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876380082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:36,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:36,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:36,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119655432] [2023-08-29 21:17:36,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:36,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:17:36,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:17:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:17:36,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 169 [2023-08-29 21:17:36,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:36,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 169 [2023-08-29 21:17:36,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:36,653 INFO L130 PetriNetUnfolder]: 29/83 cut-off events. [2023-08-29 21:17:36,653 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-29 21:17:36,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 83 events. 29/83 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 237 event pairs, 20 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 214. Up to 63 conditions per place. [2023-08-29 21:17:36,654 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 26 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-29 21:17:36,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 217 flow [2023-08-29 21:17:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:17:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:17:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-29 21:17:36,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47731755424063116 [2023-08-29 21:17:36,656 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-29 21:17:36,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-29 21:17:36,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:36,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-29 21:17:36,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,658 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 153 flow. Second operand 3 states and 242 transitions. [2023-08-29 21:17:36,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 217 flow [2023-08-29 21:17:36,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 169 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-29 21:17:36,665 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 109 flow [2023-08-29 21:17:36,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-29 21:17:36,667 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-29 21:17:36,667 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 109 flow [2023-08-29 21:17:36,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:36,668 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-29 21:17:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:17:36,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:36,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1603332272, now seen corresponding path program 1 times [2023-08-29 21:17:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:36,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188885236] [2023-08-29 21:17:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:36,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:36,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:36,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188885236] [2023-08-29 21:17:36,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188885236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:36,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:36,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287963555] [2023-08-29 21:17:36,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:36,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:17:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:36,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:17:36,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:17:36,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-29 21:17:36,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:36,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:36,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-29 21:17:36,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:37,011 INFO L130 PetriNetUnfolder]: 25/74 cut-off events. [2023-08-29 21:17:37,012 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-29 21:17:37,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 74 events. 25/74 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 191 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 183. Up to 60 conditions per place. [2023-08-29 21:17:37,015 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-29 21:17:37,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 26 transitions, 155 flow [2023-08-29 21:17:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:17:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:17:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-08-29 21:17:37,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44822485207100593 [2023-08-29 21:17:37,019 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-08-29 21:17:37,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-08-29 21:17:37,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:37,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-08-29 21:17:37,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,022 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,022 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 109 flow. Second operand 4 states and 303 transitions. [2023-08-29 21:17:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 26 transitions, 155 flow [2023-08-29 21:17:37,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:17:37,025 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 105 flow [2023-08-29 21:17:37,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-29 21:17:37,026 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-29 21:17:37,026 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 105 flow [2023-08-29 21:17:37,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:37,027 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-29 21:17:37,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:17:37,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:37,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1836307537, now seen corresponding path program 1 times [2023-08-29 21:17:37,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:37,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216632055] [2023-08-29 21:17:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:37,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:37,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:37,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216632055] [2023-08-29 21:17:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216632055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:37,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:37,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 21:17:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502547354] [2023-08-29 21:17:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:37,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 21:17:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 21:17:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 21:17:37,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-08-29 21:17:37,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:37,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-08-29 21:17:37,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:37,319 INFO L130 PetriNetUnfolder]: 23/80 cut-off events. [2023-08-29 21:17:37,319 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-29 21:17:37,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 80 events. 23/80 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 216 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 188. Up to 36 conditions per place. [2023-08-29 21:17:37,320 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 30 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2023-08-29 21:17:37,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 205 flow [2023-08-29 21:17:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:17:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:17:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-08-29 21:17:37,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680473372781066 [2023-08-29 21:17:37,321 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-08-29 21:17:37,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-08-29 21:17:37,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:37,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-08-29 21:17:37,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,324 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 105 flow. Second operand 5 states and 386 transitions. [2023-08-29 21:17:37,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 205 flow [2023-08-29 21:17:37,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:17:37,326 INFO L231 Difference]: Finished difference. Result has 50 places, 31 transitions, 156 flow [2023-08-29 21:17:37,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=31} [2023-08-29 21:17:37,326 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-08-29 21:17:37,326 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 31 transitions, 156 flow [2023-08-29 21:17:37,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:37,327 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:37,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:17:37,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:37,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash 409945830, now seen corresponding path program 1 times [2023-08-29 21:17:37,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:37,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325142875] [2023-08-29 21:17:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:37,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325142875] [2023-08-29 21:17:37,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325142875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:37,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:37,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:17:37,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590605585] [2023-08-29 21:17:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:37,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:17:37,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:37,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:17:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:17:37,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-08-29 21:17:37,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 31 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:37,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-08-29 21:17:37,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:37,493 INFO L130 PetriNetUnfolder]: 16/60 cut-off events. [2023-08-29 21:17:37,493 INFO L131 PetriNetUnfolder]: For 71/73 co-relation queries the response was YES. [2023-08-29 21:17:37,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 60 events. 16/60 cut-off events. For 71/73 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 12 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 181. Up to 33 conditions per place. [2023-08-29 21:17:37,493 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 19 selfloop transitions, 4 changer transitions 6/31 dead transitions. [2023-08-29 21:17:37,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 31 transitions, 206 flow [2023-08-29 21:17:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:17:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:17:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 305 transitions. [2023-08-29 21:17:37,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511834319526627 [2023-08-29 21:17:37,495 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 305 transitions. [2023-08-29 21:17:37,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 305 transitions. [2023-08-29 21:17:37,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:37,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 305 transitions. [2023-08-29 21:17:37,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,497 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,497 INFO L175 Difference]: Start difference. First operand has 50 places, 31 transitions, 156 flow. Second operand 4 states and 305 transitions. [2023-08-29 21:17:37,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 31 transitions, 206 flow [2023-08-29 21:17:37,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:17:37,499 INFO L231 Difference]: Finished difference. Result has 52 places, 25 transitions, 134 flow [2023-08-29 21:17:37,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=25} [2023-08-29 21:17:37,500 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-08-29 21:17:37,500 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 25 transitions, 134 flow [2023-08-29 21:17:37,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:37,500 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:37,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:17:37,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:37,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:37,501 INFO L85 PathProgramCache]: Analyzing trace with hash -269082989, now seen corresponding path program 1 times [2023-08-29 21:17:37,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:37,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505364315] [2023-08-29 21:17:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:37,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:37,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505364315] [2023-08-29 21:17:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505364315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:37,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 21:17:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66369266] [2023-08-29 21:17:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:17:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:17:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:17:37,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 169 [2023-08-29 21:17:37,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 25 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 64.375) internal successors, (515), 8 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:37,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:37,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 169 [2023-08-29 21:17:37,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:37,999 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-08-29 21:17:37,999 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-08-29 21:17:37,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 47 events. 12/47 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 2/49 useless extension candidates. Maximal degree in co-relation 157. Up to 16 conditions per place. [2023-08-29 21:17:37,999 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 19 selfloop transitions, 5 changer transitions 10/34 dead transitions. [2023-08-29 21:17:38,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 34 transitions, 224 flow [2023-08-29 21:17:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:17:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:17:38,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-08-29 21:17:38,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39475908706677937 [2023-08-29 21:17:38,001 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-08-29 21:17:38,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-08-29 21:17:38,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:38,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-08-29 21:17:38,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,005 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,005 INFO L175 Difference]: Start difference. First operand has 52 places, 25 transitions, 134 flow. Second operand 7 states and 467 transitions. [2023-08-29 21:17:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 34 transitions, 224 flow [2023-08-29 21:17:38,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 34 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 21:17:38,007 INFO L231 Difference]: Finished difference. Result has 52 places, 23 transitions, 131 flow [2023-08-29 21:17:38,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=23} [2023-08-29 21:17:38,007 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-08-29 21:17:38,007 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 23 transitions, 131 flow [2023-08-29 21:17:38,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.375) internal successors, (515), 8 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:38,008 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:38,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 21:17:38,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:38,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1179015449, now seen corresponding path program 2 times [2023-08-29 21:17:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:38,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036061172] [2023-08-29 21:17:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:38,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:38,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:38,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036061172] [2023-08-29 21:17:38,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036061172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:38,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:38,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 21:17:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573080028] [2023-08-29 21:17:38,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:38,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:17:38,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:38,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:17:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:17:38,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 169 [2023-08-29 21:17:38,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 23 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 64.57142857142857) internal successors, (452), 7 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:38,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 169 [2023-08-29 21:17:38,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:38,485 INFO L130 PetriNetUnfolder]: 3/29 cut-off events. [2023-08-29 21:17:38,485 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2023-08-29 21:17:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 29 events. 3/29 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 1 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 114. Up to 15 conditions per place. [2023-08-29 21:17:38,486 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 17 selfloop transitions, 4 changer transitions 4/25 dead transitions. [2023-08-29 21:17:38,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 25 transitions, 192 flow [2023-08-29 21:17:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 21:17:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 21:17:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 457 transitions. [2023-08-29 21:17:38,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3863060016906171 [2023-08-29 21:17:38,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 457 transitions. [2023-08-29 21:17:38,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 457 transitions. [2023-08-29 21:17:38,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:38,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 457 transitions. [2023-08-29 21:17:38,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.28571428571429) internal successors, (457), 7 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,491 INFO L175 Difference]: Start difference. First operand has 52 places, 23 transitions, 131 flow. Second operand 7 states and 457 transitions. [2023-08-29 21:17:38,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 25 transitions, 192 flow [2023-08-29 21:17:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 25 transitions, 175 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 21:17:38,493 INFO L231 Difference]: Finished difference. Result has 50 places, 21 transitions, 114 flow [2023-08-29 21:17:38,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=21} [2023-08-29 21:17:38,494 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-08-29 21:17:38,494 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 21 transitions, 114 flow [2023-08-29 21:17:38,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 64.57142857142857) internal successors, (452), 7 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:17:38,494 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:17:38,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:17:38,494 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-29 21:17:38,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:17:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1179016379, now seen corresponding path program 3 times [2023-08-29 21:17:38,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:17:38,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913130016] [2023-08-29 21:17:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:17:38,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:17:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:17:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-29 21:17:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:17:38,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913130016] [2023-08-29 21:17:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913130016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:17:38,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:17:38,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 21:17:38,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923395086] [2023-08-29 21:17:38,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:17:38,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:17:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:17:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:17:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:17:38,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 169 [2023-08-29 21:17:38,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 21 transitions, 114 flow. Second operand has 7 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:17:38,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 169 [2023-08-29 21:17:38,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:17:38,904 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-08-29 21:17:38,904 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-29 21:17:38,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 20 events. 1/20 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 76. Up to 13 conditions per place. [2023-08-29 21:17:38,904 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-29 21:17:38,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 20 transitions, 148 flow [2023-08-29 21:17:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:17:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:17:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2023-08-29 21:17:38,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035502958579882 [2023-08-29 21:17:38,906 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 341 transitions. [2023-08-29 21:17:38,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 341 transitions. [2023-08-29 21:17:38,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:17:38,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 341 transitions. [2023-08-29 21:17:38,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.2) internal successors, (341), 5 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,909 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,909 INFO L175 Difference]: Start difference. First operand has 50 places, 21 transitions, 114 flow. Second operand 5 states and 341 transitions. [2023-08-29 21:17:38,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 20 transitions, 148 flow [2023-08-29 21:17:38,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 20 transitions, 134 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-29 21:17:38,911 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-08-29 21:17:38,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-08-29 21:17:38,911 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-29 21:17:38,912 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-08-29 21:17:38,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:17:38,914 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-29 21:17:38,914 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-29 21:17:38,914 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-29 21:17:38,914 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-29 21:17:38,915 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-29 21:17:38,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-29 21:17:38,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-08-29 21:17:38,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-08-29 21:17:38,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-08-29 21:17:38,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:17:38,916 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 21:17:38,920 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-29 21:17:38,920 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-29 21:17:38,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:17:38 BasicIcfg [2023-08-29 21:17:38,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-29 21:17:38,923 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-29 21:17:38,923 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-29 21:17:38,924 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-29 21:17:38,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:17:31" (3/4) ... [2023-08-29 21:17:38,926 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-29 21:17:38,931 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-08-29 21:17:38,933 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-08-29 21:17:38,933 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:17:38,933 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-08-29 21:17:38,961 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-29 21:17:38,962 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-29 21:17:38,962 INFO L158 Benchmark]: Toolchain (without parser) took 8417.52ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 60.3MB in the beginning and 94.4MB in the end (delta: -34.2MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,962 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-29 21:17:38,963 INFO L158 Benchmark]: CACSL2BoogieTranslator took 637.22ms. Allocated memory is still 83.9MB. Free memory was 60.1MB in the beginning and 52.1MB in the end (delta: 8.0MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,963 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.17ms. Allocated memory is still 83.9MB. Free memory was 52.1MB in the beginning and 49.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,963 INFO L158 Benchmark]: Boogie Preprocessor took 30.73ms. Allocated memory is still 83.9MB. Free memory was 49.8MB in the beginning and 48.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,964 INFO L158 Benchmark]: RCFGBuilder took 423.66ms. Allocated memory is still 83.9MB. Free memory was 48.3MB in the beginning and 33.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,964 INFO L158 Benchmark]: TraceAbstraction took 7221.34ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 33.2MB in the beginning and 97.6MB in the end (delta: -64.4MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,964 INFO L158 Benchmark]: Witness Printer took 38.28ms. Allocated memory is still 151.0MB. Free memory was 97.6MB in the beginning and 94.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-29 21:17:38,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 62.9MB. Free memory is still 40.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 637.22ms. Allocated memory is still 83.9MB. Free memory was 60.1MB in the beginning and 52.1MB in the end (delta: 8.0MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.17ms. Allocated memory is still 83.9MB. Free memory was 52.1MB in the beginning and 49.8MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.73ms. Allocated memory is still 83.9MB. Free memory was 49.8MB in the beginning and 48.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 423.66ms. Allocated memory is still 83.9MB. Free memory was 48.3MB in the beginning and 33.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7221.34ms. Allocated memory was 83.9MB in the beginning and 151.0MB in the end (delta: 67.1MB). Free memory was 33.2MB in the beginning and 97.6MB in the end (delta: -64.4MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Witness Printer took 38.28ms. Allocated memory is still 151.0MB. Free memory was 97.6MB in the beginning and 94.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 83 PlacesBefore, 27 PlacesAfterwards, 83 TransitionsBefore, 24 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 2 ConcurrentYvCompositions, 3 ChoiceCompositions, 85 TotalNumberOfCompositions, 2039 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1237, independent: 1127, independent conditional: 0, independent unconditional: 1127, dependent: 110, dependent conditional: 0, dependent unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 684, independent: 662, independent conditional: 0, independent unconditional: 662, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1237, independent: 465, independent conditional: 0, independent unconditional: 465, dependent: 88, dependent conditional: 0, dependent unconditional: 88, unknown: 684, unknown conditional: 0, unknown unconditional: 684] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 935]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 108 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.1s, OverallIterations: 12, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1153 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 723 mSDsluCounter, 363 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 206 mSDsCounter, 104 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2269 IncrementalHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 104 mSolverCounterUnsat, 157 mSDtfsCounter, 2269 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=8, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 169 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 1414 SizeOfPredicates, 2 NumberOfNonLiveVariables, 250 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 10 PerfectInterpolantSequences, 395/438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-29 21:17:38,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE