./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 BEFORE --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 BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 00:07:51,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:07:51,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:07:51,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:07:51,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:07:51,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:07:51,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:07:51,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:07:51,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:07:51,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:07:51,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:07:51,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:07:51,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:07:51,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:07:51,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:07:51,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:07:51,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:07:51,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:07:51,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:07:51,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:07:51,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:07:51,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:07:51,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:07:51,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:07:51,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:07:51,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:07:51,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:07:51,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:07:51,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:07:51,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:07:51,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:07:51,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:07:51,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:07:51,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:07:51,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:07:51,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:07:51,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:07:51,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:07:51,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:07:51,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:07:51,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:07:51,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:07:51,546 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:07:51,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:07:51,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:07:51,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:07:51,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:07:51,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:07:51,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:07:51,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:07:51,550 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:07:51,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:07:51,551 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:07:51,552 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:07:51,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:07:51,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:07:51,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:07:51,552 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:07:51,553 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:07:51,553 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:07:51,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:07:51,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:07:51,554 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:07:51,554 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:07:51,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:07:51,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:07:51,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:07:51,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:07:51,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:07:51,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:07:51,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:07:51,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:07:51,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:07:51,556 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:07:51,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:07:51,557 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:07:51,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f794c04b6feffb38c1e5c415a278bf34dda5287d389b184a9a7d818ab0b70e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:07:51,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:07:51,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:07:51,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:07:51,924 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:07:51,924 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:07:51,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-09-01 00:07:53,240 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:07:53,524 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:07:53,525 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-09-01 00:07:53,540 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62002ea96/e0a1027738854a67928b7dbf94fb635f/FLAG48fb40376 [2023-09-01 00:07:53,556 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62002ea96/e0a1027738854a67928b7dbf94fb635f [2023-09-01 00:07:53,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:07:53,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:07:53,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:07:53,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:07:53,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:07:53,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:07:53" (1/1) ... [2023-09-01 00:07:53,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732e13f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:53, skipping insertion in model container [2023-09-01 00:07:53,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:07:53" (1/1) ... [2023-09-01 00:07:53,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:07:53,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:07:54,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:07:54,042 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:07:54,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:07:54,188 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:07:54,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54 WrapperNode [2023-09-01 00:07:54,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:07:54,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:07:54,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:07:54,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:07:54,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,263 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2023-09-01 00:07:54,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:07:54,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:07:54,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:07:54,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:07:54,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,307 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:07:54,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:07:54,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:07:54,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:07:54,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (1/1) ... [2023-09-01 00:07:54,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:07:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:54,354 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) [2023-09-01 00:07:54,376 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 [2023-09-01 00:07:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:07:54,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:07:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:07:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:07:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:07:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:07:54,393 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:07:54,393 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:07:54,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:07:54,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:07:54,395 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:07:54,595 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:07:54,597 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:07:54,833 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:07:54,839 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:07:54,839 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-09-01 00:07:54,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:54 BoogieIcfgContainer [2023-09-01 00:07:54,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:07:54,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:07:54,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:07:54,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:07:54,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:07:53" (1/3) ... [2023-09-01 00:07:54,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d98d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:07:54, skipping insertion in model container [2023-09-01 00:07:54,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:07:54" (2/3) ... [2023-09-01 00:07:54,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d98d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:07:54, skipping insertion in model container [2023-09-01 00:07:54,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:54" (3/3) ... [2023-09-01 00:07:54,850 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_06-tricky_address1.i [2023-09-01 00:07:54,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:07:54,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-09-01 00:07:54,868 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:07:54,940 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-09-01 00:07:54,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 84 transitions, 173 flow [2023-09-01 00:07:55,036 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-09-01 00:07:55,037 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:55,042 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. [2023-09-01 00:07:55,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 84 transitions, 173 flow [2023-09-01 00:07:55,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 83 transitions, 169 flow [2023-09-01 00:07:55,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:07:55,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 83 transitions, 169 flow [2023-09-01 00:07:55,071 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 83 transitions, 169 flow [2023-09-01 00:07:55,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 83 transitions, 169 flow [2023-09-01 00:07:55,115 INFO L130 PetriNetUnfolder]: 4/83 cut-off events. [2023-09-01 00:07:55,116 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:55,117 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. [2023-09-01 00:07:55,118 INFO L119 LiptonReduction]: Number of co-enabled transitions 1144 [2023-09-01 00:07:57,332 INFO L134 LiptonReduction]: Checked pairs total: 2039 [2023-09-01 00:07:57,332 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-09-01 00:07:57,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 00:07:57,351 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;@66f25f57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:07:57,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-09-01 00:07:57,354 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-09-01 00:07:57,354 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:57,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:57,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-09-01 00:07:57,356 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)] === [2023-09-01 00:07:57,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash 10123, now seen corresponding path program 1 times [2023-09-01 00:07:57,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:57,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761302807] [2023-09-01 00:07:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:57,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:57,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:57,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761302807] [2023-09-01 00:07:57,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761302807] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:57,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:57,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 00:07:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198162180] [2023-09-01 00:07:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:57,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 00:07:57,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 00:07:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 00:07:57,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-09-01 00:07:57,601 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) [2023-09-01 00:07:57,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:57,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-09-01 00:07:57,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:57,679 INFO L130 PetriNetUnfolder]: 41/99 cut-off events. [2023-09-01 00:07:57,679 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:57,680 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. [2023-09-01 00:07:57,683 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 17 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-09-01 00:07:57,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 75 flow [2023-09-01 00:07:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 00:07:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 00:07:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 182 transitions. [2023-09-01 00:07:57,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-09-01 00:07:57,700 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 182 transitions. [2023-09-01 00:07:57,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 182 transitions. [2023-09-01 00:07:57,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:57,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 182 transitions. [2023-09-01 00:07:57,705 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) [2023-09-01 00:07:57,709 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) [2023-09-01 00:07:57,709 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) [2023-09-01 00:07:57,711 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 51 flow. Second operand 2 states and 182 transitions. [2023-09-01 00:07:57,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 75 flow [2023-09-01 00:07:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:57,714 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 40 flow [2023-09-01 00:07:57,716 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} [2023-09-01 00:07:57,719 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-09-01 00:07:57,720 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 40 flow [2023-09-01 00:07:57,720 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) [2023-09-01 00:07:57,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:57,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-09-01 00:07:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:07:57,721 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)] === [2023-09-01 00:07:57,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash 9734106, now seen corresponding path program 1 times [2023-09-01 00:07:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:57,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960997093] [2023-09-01 00:07:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:57,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:57,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960997093] [2023-09-01 00:07:57,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960997093] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:57,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:57,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:57,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955756762] [2023-09-01 00:07:57,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:57,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:07:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:07:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:07:57,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-09-01 00:07:57,807 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) [2023-09-01 00:07:57,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:57,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-09-01 00:07:57,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:57,847 INFO L130 PetriNetUnfolder]: 41/100 cut-off events. [2023-09-01 00:07:57,847 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:57,848 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. [2023-09-01 00:07:57,848 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-09-01 00:07:57,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 78 flow [2023-09-01 00:07:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-09-01 00:07:57,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-09-01 00:07:57,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-09-01 00:07:57,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-09-01 00:07:57,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:57,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-09-01 00:07:57,853 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) [2023-09-01 00:07:57,855 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) [2023-09-01 00:07:57,855 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) [2023-09-01 00:07:57,855 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 40 flow. Second operand 3 states and 247 transitions. [2023-09-01 00:07:57,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 78 flow [2023-09-01 00:07:57,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:07:57,856 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 52 flow [2023-09-01 00:07:57,857 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} [2023-09-01 00:07:57,857 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2023-09-01 00:07:57,857 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 52 flow [2023-09-01 00:07:57,858 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) [2023-09-01 00:07:57,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:57,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 00:07:57,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 00:07:57,858 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)] === [2023-09-01 00:07:57,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:57,859 INFO L85 PathProgramCache]: Analyzing trace with hash 301090086, now seen corresponding path program 1 times [2023-09-01 00:07:57,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:57,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759810372] [2023-09-01 00:07:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:57,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759810372] [2023-09-01 00:07:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759810372] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:57,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007769076] [2023-09-01 00:07:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:57,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:57,969 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) [2023-09-01 00:07:57,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:07:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:07:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:58,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:58,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007769076] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:58,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:58,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:07:58,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015688888] [2023-09-01 00:07:58,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:58,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:07:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:07:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:07:58,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 169 [2023-09-01 00:07:58,231 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) [2023-09-01 00:07:58,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:58,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 169 [2023-09-01 00:07:58,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:58,377 INFO L130 PetriNetUnfolder]: 41/103 cut-off events. [2023-09-01 00:07:58,378 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:07:58,378 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. [2023-09-01 00:07:58,379 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 16 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2023-09-01 00:07:58,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 106 flow [2023-09-01 00:07:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:07:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:07:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2023-09-01 00:07:58,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46745562130177515 [2023-09-01 00:07:58,382 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2023-09-01 00:07:58,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2023-09-01 00:07:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:58,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2023-09-01 00:07:58,385 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) [2023-09-01 00:07:58,388 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) [2023-09-01 00:07:58,388 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) [2023-09-01 00:07:58,388 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 6 states and 474 transitions. [2023-09-01 00:07:58,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 106 flow [2023-09-01 00:07:58,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 102 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:58,390 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 84 flow [2023-09-01 00:07:58,390 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} [2023-09-01 00:07:58,391 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-09-01 00:07:58,391 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 84 flow [2023-09-01 00:07:58,392 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) [2023-09-01 00:07:58,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:58,392 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 00:07:58,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:58,598 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 [2023-09-01 00:07:58,599 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)] === [2023-09-01 00:07:58,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1220508378, now seen corresponding path program 2 times [2023-09-01 00:07:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:58,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178222593] [2023-09-01 00:07:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:58,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:58,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:58,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178222593] [2023-09-01 00:07:58,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178222593] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:58,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456830069] [2023-09-01 00:07:58,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:07:58,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:58,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:58,743 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) [2023-09-01 00:07:58,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:07:58,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 00:07:58,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:07:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 00:07:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:58,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 00:07:58,914 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 [2023-09-01 00:07:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 00:07:58,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 00:07:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456830069] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:58,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 00:07:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-09-01 00:07:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454250764] [2023-09-01 00:07:58,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:07:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:07:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 00:07:58,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-09-01 00:07:59,000 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) [2023-09-01 00:07:59,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:59,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-09-01 00:07:59,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:59,048 INFO L130 PetriNetUnfolder]: 33/86 cut-off events. [2023-09-01 00:07:59,048 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 00:07:59,049 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. [2023-09-01 00:07:59,050 INFO L137 encePairwiseOnDemand]: 167/169 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-09-01 00:07:59,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 122 flow [2023-09-01 00:07:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:07:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:07:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-09-01 00:07:59,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49506903353057197 [2023-09-01 00:07:59,052 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-09-01 00:07:59,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-09-01 00:07:59,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:59,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-09-01 00:07:59,053 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) [2023-09-01 00:07:59,054 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) [2023-09-01 00:07:59,054 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) [2023-09-01 00:07:59,055 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 84 flow. Second operand 3 states and 251 transitions. [2023-09-01 00:07:59,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 122 flow [2023-09-01 00:07:59,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 108 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:59,056 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 70 flow [2023-09-01 00:07:59,057 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} [2023-09-01 00:07:59,057 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-09-01 00:07:59,058 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 70 flow [2023-09-01 00:07:59,058 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) [2023-09-01 00:07:59,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:59,058 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-09-01 00:07:59,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:07:59,265 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 [2023-09-01 00:07:59,266 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)] === [2023-09-01 00:07:59,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1220508367, now seen corresponding path program 1 times [2023-09-01 00:07:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:59,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27618865] [2023-09-01 00:07:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27618865] [2023-09-01 00:07:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27618865] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:07:59,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127512351] [2023-09-01 00:07:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:59,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:07:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:07:59,369 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) [2023-09-01 00:07:59,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:07:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:07:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:07:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:59,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:07:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 00:07:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127512351] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:07:59,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:07:59,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:07:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224460646] [2023-09-01 00:07:59,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:07:59,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:07:59,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:07:59,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:07:59,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 169 [2023-09-01 00:07:59,555 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) [2023-09-01 00:07:59,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:07:59,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 169 [2023-09-01 00:07:59,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:07:59,616 INFO L130 PetriNetUnfolder]: 33/92 cut-off events. [2023-09-01 00:07:59,616 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 00:07:59,617 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. [2023-09-01 00:07:59,619 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 15 selfloop transitions, 11 changer transitions 0/28 dead transitions. [2023-09-01 00:07:59,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 158 flow [2023-09-01 00:07:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:07:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:07:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 932 transitions. [2023-09-01 00:07:59,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45956607495069035 [2023-09-01 00:07:59,626 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 932 transitions. [2023-09-01 00:07:59,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 932 transitions. [2023-09-01 00:07:59,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:07:59,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 932 transitions. [2023-09-01 00:07:59,629 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) [2023-09-01 00:07:59,633 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) [2023-09-01 00:07:59,633 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) [2023-09-01 00:07:59,634 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 70 flow. Second operand 12 states and 932 transitions. [2023-09-01 00:07:59,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 158 flow [2023-09-01 00:07:59,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 28 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 00:07:59,638 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 153 flow [2023-09-01 00:07:59,638 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} [2023-09-01 00:07:59,640 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2023-09-01 00:07:59,641 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 153 flow [2023-09-01 00:07:59,642 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) [2023-09-01 00:07:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:07:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 00:07:59,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 00:07:59,849 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 [2023-09-01 00:07:59,849 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)] === [2023-09-01 00:07:59,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:07:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1603332273, now seen corresponding path program 2 times [2023-09-01 00:07:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:07:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632633830] [2023-09-01 00:07:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:07:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:07:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:07:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:07:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:07:59,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632633830] [2023-09-01 00:07:59,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632633830] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:07:59,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:07:59,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:07:59,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951863619] [2023-09-01 00:07:59,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:07:59,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:07:59,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:07:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:07:59,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:08:00,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 169 [2023-09-01 00:08:00,049 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) [2023-09-01 00:08:00,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:00,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 169 [2023-09-01 00:08:00,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:00,103 INFO L130 PetriNetUnfolder]: 29/83 cut-off events. [2023-09-01 00:08:00,103 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-09-01 00:08:00,104 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. [2023-09-01 00:08:00,104 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 26 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-09-01 00:08:00,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 217 flow [2023-09-01 00:08:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:08:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:08:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-09-01 00:08:00,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47731755424063116 [2023-09-01 00:08:00,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-09-01 00:08:00,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-09-01 00:08:00,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:00,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-09-01 00:08:00,107 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) [2023-09-01 00:08:00,108 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) [2023-09-01 00:08:00,109 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) [2023-09-01 00:08:00,109 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 153 flow. Second operand 3 states and 242 transitions. [2023-09-01 00:08:00,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 217 flow [2023-09-01 00:08:00,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 169 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-09-01 00:08:00,112 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 109 flow [2023-09-01 00:08:00,112 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} [2023-09-01 00:08:00,113 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 00:08:00,113 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 109 flow [2023-09-01 00:08:00,113 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) [2023-09-01 00:08:00,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:00,114 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-09-01 00:08:00,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 00:08:00,114 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)] === [2023-09-01 00:08:00,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1603332272, now seen corresponding path program 1 times [2023-09-01 00:08:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:00,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69605417] [2023-09-01 00:08:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69605417] [2023-09-01 00:08:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69605417] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:00,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:08:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152886053] [2023-09-01 00:08:00,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:08:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:08:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:08:00,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-09-01 00:08:00,310 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) [2023-09-01 00:08:00,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:00,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-09-01 00:08:00,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:00,353 INFO L130 PetriNetUnfolder]: 25/74 cut-off events. [2023-09-01 00:08:00,354 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-09-01 00:08:00,354 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. [2023-09-01 00:08:00,355 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-09-01 00:08:00,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 26 transitions, 155 flow [2023-09-01 00:08:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:08:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:08:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-09-01 00:08:00,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44822485207100593 [2023-09-01 00:08:00,357 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-09-01 00:08:00,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-09-01 00:08:00,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:00,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-09-01 00:08:00,358 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) [2023-09-01 00:08:00,359 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) [2023-09-01 00:08:00,359 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) [2023-09-01 00:08:00,360 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 109 flow. Second operand 4 states and 303 transitions. [2023-09-01 00:08:00,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 26 transitions, 155 flow [2023-09-01 00:08:00,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:08:00,362 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 105 flow [2023-09-01 00:08:00,362 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} [2023-09-01 00:08:00,363 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 00:08:00,363 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 105 flow [2023-09-01 00:08:00,363 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) [2023-09-01 00:08:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:00,363 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-09-01 00:08:00,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 00:08:00,364 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)] === [2023-09-01 00:08:00,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1836307537, now seen corresponding path program 1 times [2023-09-01 00:08:00,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:00,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045015296] [2023-09-01 00:08:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:00,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045015296] [2023-09-01 00:08:00,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045015296] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:00,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:00,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 00:08:00,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149076189] [2023-09-01 00:08:00,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:00,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 00:08:00,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:00,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 00:08:00,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 00:08:00,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 169 [2023-09-01 00:08:00,609 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) [2023-09-01 00:08:00,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:00,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 169 [2023-09-01 00:08:00,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:00,669 INFO L130 PetriNetUnfolder]: 23/80 cut-off events. [2023-09-01 00:08:00,669 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-09-01 00:08:00,669 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. [2023-09-01 00:08:00,670 INFO L137 encePairwiseOnDemand]: 161/169 looper letters, 30 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2023-09-01 00:08:00,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 205 flow [2023-09-01 00:08:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 00:08:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 00:08:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-09-01 00:08:00,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680473372781066 [2023-09-01 00:08:00,672 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-09-01 00:08:00,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-09-01 00:08:00,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:00,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-09-01 00:08:00,673 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) [2023-09-01 00:08:00,675 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) [2023-09-01 00:08:00,675 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) [2023-09-01 00:08:00,675 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 105 flow. Second operand 5 states and 386 transitions. [2023-09-01 00:08:00,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 205 flow [2023-09-01 00:08:00,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-09-01 00:08:00,678 INFO L231 Difference]: Finished difference. Result has 50 places, 31 transitions, 156 flow [2023-09-01 00:08:00,678 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} [2023-09-01 00:08:00,680 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-09-01 00:08:00,680 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 31 transitions, 156 flow [2023-09-01 00:08:00,681 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) [2023-09-01 00:08:00,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:00,681 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:00,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:08:00,681 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)] === [2023-09-01 00:08:00,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:00,682 INFO L85 PathProgramCache]: Analyzing trace with hash 409945830, now seen corresponding path program 1 times [2023-09-01 00:08:00,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:00,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150175592] [2023-09-01 00:08:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:00,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:00,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150175592] [2023-09-01 00:08:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150175592] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:00,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:00,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:08:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612869860] [2023-09-01 00:08:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:00,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 00:08:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 00:08:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 00:08:00,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-09-01 00:08:00,829 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) [2023-09-01 00:08:00,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:00,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-09-01 00:08:00,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:00,874 INFO L130 PetriNetUnfolder]: 16/60 cut-off events. [2023-09-01 00:08:00,875 INFO L131 PetriNetUnfolder]: For 71/73 co-relation queries the response was YES. [2023-09-01 00:08:00,875 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. [2023-09-01 00:08:00,876 INFO L137 encePairwiseOnDemand]: 165/169 looper letters, 19 selfloop transitions, 4 changer transitions 6/31 dead transitions. [2023-09-01 00:08:00,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 31 transitions, 206 flow [2023-09-01 00:08:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 00:08:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 00:08:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 305 transitions. [2023-09-01 00:08:00,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511834319526627 [2023-09-01 00:08:00,878 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 305 transitions. [2023-09-01 00:08:00,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 305 transitions. [2023-09-01 00:08:00,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:00,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 305 transitions. [2023-09-01 00:08:00,879 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) [2023-09-01 00:08:00,880 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) [2023-09-01 00:08:00,881 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) [2023-09-01 00:08:00,881 INFO L175 Difference]: Start difference. First operand has 50 places, 31 transitions, 156 flow. Second operand 4 states and 305 transitions. [2023-09-01 00:08:00,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 31 transitions, 206 flow [2023-09-01 00:08:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:08:00,883 INFO L231 Difference]: Finished difference. Result has 52 places, 25 transitions, 134 flow [2023-09-01 00:08:00,883 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} [2023-09-01 00:08:00,884 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-09-01 00:08:00,884 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 25 transitions, 134 flow [2023-09-01 00:08:00,884 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) [2023-09-01 00:08:00,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:00,884 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:08:00,885 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)] === [2023-09-01 00:08:00,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -269082989, now seen corresponding path program 1 times [2023-09-01 00:08:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144095140] [2023-09-01 00:08:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:00,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:01,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:01,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144095140] [2023-09-01 00:08:01,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144095140] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:01,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 00:08:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930969779] [2023-09-01 00:08:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 00:08:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 00:08:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-09-01 00:08:01,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 169 [2023-09-01 00:08:01,243 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) [2023-09-01 00:08:01,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:01,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 169 [2023-09-01 00:08:01,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:01,352 INFO L130 PetriNetUnfolder]: 12/47 cut-off events. [2023-09-01 00:08:01,352 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2023-09-01 00:08:01,353 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. [2023-09-01 00:08:01,353 INFO L137 encePairwiseOnDemand]: 160/169 looper letters, 19 selfloop transitions, 5 changer transitions 10/34 dead transitions. [2023-09-01 00:08:01,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 34 transitions, 224 flow [2023-09-01 00:08:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 00:08:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 00:08:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-09-01 00:08:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39475908706677937 [2023-09-01 00:08:01,355 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-09-01 00:08:01,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-09-01 00:08:01,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:01,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-09-01 00:08:01,357 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) [2023-09-01 00:08:01,358 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) [2023-09-01 00:08:01,359 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) [2023-09-01 00:08:01,359 INFO L175 Difference]: Start difference. First operand has 52 places, 25 transitions, 134 flow. Second operand 7 states and 467 transitions. [2023-09-01 00:08:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 34 transitions, 224 flow [2023-09-01 00:08:01,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 34 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 00:08:01,361 INFO L231 Difference]: Finished difference. Result has 52 places, 23 transitions, 131 flow [2023-09-01 00:08:01,361 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} [2023-09-01 00:08:01,361 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2023-09-01 00:08:01,361 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 23 transitions, 131 flow [2023-09-01 00:08:01,362 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) [2023-09-01 00:08:01,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:01,362 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:01,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 00:08:01,362 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)] === [2023-09-01 00:08:01,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1179015449, now seen corresponding path program 2 times [2023-09-01 00:08:01,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:01,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339874830] [2023-09-01 00:08:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:01,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:01,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339874830] [2023-09-01 00:08:01,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339874830] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:01,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 00:08:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857024091] [2023-09-01 00:08:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:08:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:08:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:08:01,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 169 [2023-09-01 00:08:01,741 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) [2023-09-01 00:08:01,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:01,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 169 [2023-09-01 00:08:01,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:01,843 INFO L130 PetriNetUnfolder]: 3/29 cut-off events. [2023-09-01 00:08:01,843 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2023-09-01 00:08:01,844 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. [2023-09-01 00:08:01,844 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 17 selfloop transitions, 4 changer transitions 4/25 dead transitions. [2023-09-01 00:08:01,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 25 transitions, 192 flow [2023-09-01 00:08:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 00:08:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 00:08:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 457 transitions. [2023-09-01 00:08:01,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3863060016906171 [2023-09-01 00:08:01,846 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 457 transitions. [2023-09-01 00:08:01,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 457 transitions. [2023-09-01 00:08:01,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:01,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 457 transitions. [2023-09-01 00:08:01,847 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) [2023-09-01 00:08:01,875 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) [2023-09-01 00:08:01,875 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) [2023-09-01 00:08:01,876 INFO L175 Difference]: Start difference. First operand has 52 places, 23 transitions, 131 flow. Second operand 7 states and 457 transitions. [2023-09-01 00:08:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 25 transitions, 192 flow [2023-09-01 00:08:01,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 25 transitions, 175 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-09-01 00:08:01,877 INFO L231 Difference]: Finished difference. Result has 50 places, 21 transitions, 114 flow [2023-09-01 00:08:01,878 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} [2023-09-01 00:08:01,878 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-09-01 00:08:01,878 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 21 transitions, 114 flow [2023-09-01 00:08:01,878 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) [2023-09-01 00:08:01,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:08:01,879 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:08:01,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 00:08:01,879 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)] === [2023-09-01 00:08:01,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:08:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1179016379, now seen corresponding path program 3 times [2023-09-01 00:08:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:08:01,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397724626] [2023-09-01 00:08:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:08:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:08:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:08:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-09-01 00:08:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:08:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397724626] [2023-09-01 00:08:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397724626] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:08:02,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:08:02,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 00:08:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388138897] [2023-09-01 00:08:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:08:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:08:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:08:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:08:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:08:02,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 169 [2023-09-01 00:08:02,241 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) [2023-09-01 00:08:02,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:08:02,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 169 [2023-09-01 00:08:02,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:08:02,290 INFO L130 PetriNetUnfolder]: 1/20 cut-off events. [2023-09-01 00:08:02,290 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-09-01 00:08:02,290 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. [2023-09-01 00:08:02,291 INFO L137 encePairwiseOnDemand]: 164/169 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-09-01 00:08:02,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 20 transitions, 148 flow [2023-09-01 00:08:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 00:08:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 00:08:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 341 transitions. [2023-09-01 00:08:02,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035502958579882 [2023-09-01 00:08:02,292 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 341 transitions. [2023-09-01 00:08:02,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 341 transitions. [2023-09-01 00:08:02,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:08:02,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 341 transitions. [2023-09-01 00:08:02,293 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) [2023-09-01 00:08:02,295 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) [2023-09-01 00:08:02,295 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) [2023-09-01 00:08:02,295 INFO L175 Difference]: Start difference. First operand has 50 places, 21 transitions, 114 flow. Second operand 5 states and 341 transitions. [2023-09-01 00:08:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 20 transitions, 148 flow [2023-09-01 00:08:02,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 20 transitions, 134 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-09-01 00:08:02,296 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-09-01 00:08:02,296 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} [2023-09-01 00:08:02,297 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-09-01 00:08:02,297 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-09-01 00:08:02,297 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) [2023-09-01 00:08:02,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-09-01 00:08:02,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-09-01 00:08:02,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-09-01 00:08:02,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-09-01 00:08:02,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-09-01 00:08:02,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-09-01 00:08:02,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-09-01 00:08:02,301 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-09-01 00:08:02,302 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 16 remaining) [2023-09-01 00:08:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:08:02,302 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:08:02,306 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-09-01 00:08:02,306 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-09-01 00:08:02,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.09 12:08:02 BasicIcfg [2023-09-01 00:08:02,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-09-01 00:08:02,310 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-09-01 00:08:02,310 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-09-01 00:08:02,310 INFO L275 PluginConnector]: Witness Printer initialized [2023-09-01 00:08:02,310 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:07:54" (3/4) ... [2023-09-01 00:08:02,312 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-09-01 00:08:02,318 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2023-09-01 00:08:02,321 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-09-01 00:08:02,321 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:02,322 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-09-01 00:08:02,356 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-09-01 00:08:02,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-09-01 00:08:02,357 INFO L158 Benchmark]: Toolchain (without parser) took 8796.70ms. Allocated memory was 73.4MB in the beginning and 157.3MB in the end (delta: 83.9MB). Free memory was 50.5MB in the beginning and 64.9MB in the end (delta: -14.4MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. [2023-09-01 00:08:02,357 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 77.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:08:02,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 629.06ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 50.2MB in the beginning and 80.0MB in the end (delta: -29.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2023-09-01 00:08:02,357 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.57ms. Allocated memory is still 107.0MB. Free memory was 80.0MB in the beginning and 77.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:02,358 INFO L158 Benchmark]: Boogie Preprocessor took 53.19ms. Allocated memory is still 107.0MB. Free memory was 77.4MB in the beginning and 75.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-09-01 00:08:02,358 INFO L158 Benchmark]: RCFGBuilder took 522.29ms. Allocated memory is still 107.0MB. Free memory was 75.8MB in the beginning and 61.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-09-01 00:08:02,358 INFO L158 Benchmark]: TraceAbstraction took 7466.05ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 60.6MB in the beginning and 68.0MB in the end (delta: -7.4MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. [2023-09-01 00:08:02,359 INFO L158 Benchmark]: Witness Printer took 46.30ms. Allocated memory is still 157.3MB. Free memory was 68.0MB in the beginning and 64.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-09-01 00:08:02,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 77.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 629.06ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 50.2MB in the beginning and 80.0MB in the end (delta: -29.7MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.57ms. Allocated memory is still 107.0MB. Free memory was 80.0MB in the beginning and 77.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.19ms. Allocated memory is still 107.0MB. Free memory was 77.4MB in the beginning and 75.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 522.29ms. Allocated memory is still 107.0MB. Free memory was 75.8MB in the beginning and 61.1MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7466.05ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 60.6MB in the beginning and 68.0MB in the end (delta: -7.4MB). Peak memory consumption was 44.5MB. Max. memory is 16.1GB. * Witness Printer took 46.30ms. Allocated memory is still 157.3MB. Free memory was 68.0MB in the beginning and 64.9MB 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: 2.3s, 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: 7.3s, OverallIterations: 12, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1153 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 723 mSDsluCounter, 363 SdHoareTripleChecker+Invalid, 1.2s 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! [2023-09-01 00:08:02,389 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