./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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/28-race_reach_94-alloc_region_racing.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 7faac9952fd378b53dcd8f21391daa9cc75834f7be2a5ad0c70d96fc8524bd08 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:29:25,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:29:25,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:29:25,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:29:25,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:29:25,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:29:25,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:29:25,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:29:25,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:29:25,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:29:25,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:29:25,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:29:25,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:29:25,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:29:25,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:29:25,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:29:25,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:29:25,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:29:25,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:29:25,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:29:25,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:29:25,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:29:25,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:29:25,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:29:25,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:29:25,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:29:25,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:29:25,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:29:25,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:29:25,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:29:25,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:29:25,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:29:25,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:29:25,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:29:25,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:29:25,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:29:25,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:29:25,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:29:25,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:29:25,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:29:25,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:29:25,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:29:25,495 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:29:25,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:29:25,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:29:25,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:29:25,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:29:25,498 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:29:25,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:29:25,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:29:25,499 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:29:25,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:29:25,500 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:29:25,500 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:29:25,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:29:25,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:29:25,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:29:25,501 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:29:25,501 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:29:25,501 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:29:25,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:29:25,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:29:25,502 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:29:25,502 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:29:25,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:29:25,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:29:25,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:29:25,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:29:25,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:29:25,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:29:25,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:29:25,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:29:25,504 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:29:25,504 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:29:25,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:29:25,504 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:29:25,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faac9952fd378b53dcd8f21391daa9cc75834f7be2a5ad0c70d96fc8524bd08 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:29:25,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:29:25,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:29:25,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:29:25,845 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:29:25,845 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:29:25,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-08-30 04:29:27,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:29:27,499 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:29:27,500 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-08-30 04:29:27,515 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5a7951a/6f5e5b31d1cd425daada557f747310ef/FLAG4cfa0567a [2023-08-30 04:29:27,534 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5a7951a/6f5e5b31d1cd425daada557f747310ef [2023-08-30 04:29:27,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:29:27,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:29:27,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:29:27,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:29:27,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:29:27,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:29:27" (1/1) ... [2023-08-30 04:29:27,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7be232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:27, skipping insertion in model container [2023-08-30 04:29:27,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:29:27" (1/1) ... [2023-08-30 04:29:27,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:29:27,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:29:28,093 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i[58135,58148] [2023-08-30 04:29:28,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:29:28,155 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:29:28,216 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i[58135,58148] [2023-08-30 04:29:28,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:29:28,342 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:29:28,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28 WrapperNode [2023-08-30 04:29:28,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:29:28,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:29:28,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:29:28,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:29:28,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,416 INFO L138 Inliner]: procedures = 377, calls = 72, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 238 [2023-08-30 04:29:28,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:29:28,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:29:28,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:29:28,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:29:28,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:29:28,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:29:28,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:29:28,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:29:28,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (1/1) ... [2023-08-30 04:29:28,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:29:28,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:29:28,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:29:28,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:29:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:29:28,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-30 04:29:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:29:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-30 04:29:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:29:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:29:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:29:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:29:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:29:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-30 04:29:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:29:28,564 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:29:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:29:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:29:28,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:29:28,566 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:29:28,701 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:29:28,703 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:29:29,175 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:29:29,187 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:29:29,191 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-30 04:29:29,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:29 BoogieIcfgContainer [2023-08-30 04:29:29,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:29:29,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:29:29,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:29:29,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:29:29,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:29:27" (1/3) ... [2023-08-30 04:29:29,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383aed6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:29:29, skipping insertion in model container [2023-08-30 04:29:29,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:29:28" (2/3) ... [2023-08-30 04:29:29,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383aed6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:29:29, skipping insertion in model container [2023-08-30 04:29:29,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:29:29" (3/3) ... [2023-08-30 04:29:29,204 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_94-alloc_region_racing.i [2023-08-30 04:29:29,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:29:29,238 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-08-30 04:29:29,239 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:29:29,370 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:29:29,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 302 transitions, 612 flow [2023-08-30 04:29:29,590 INFO L130 PetriNetUnfolder]: 45/438 cut-off events. [2023-08-30 04:29:29,590 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:29:29,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 438 events. 45/438 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1674 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 239. Up to 8 conditions per place. [2023-08-30 04:29:29,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 302 transitions, 612 flow [2023-08-30 04:29:29,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 302 transitions, 612 flow [2023-08-30 04:29:29,613 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:29:29,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 302 transitions, 612 flow [2023-08-30 04:29:29,629 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 302 transitions, 612 flow [2023-08-30 04:29:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 302 transitions, 612 flow [2023-08-30 04:29:29,704 INFO L130 PetriNetUnfolder]: 45/438 cut-off events. [2023-08-30 04:29:29,704 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:29:29,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 438 events. 45/438 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1674 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 239. Up to 8 conditions per place. [2023-08-30 04:29:29,724 INFO L119 LiptonReduction]: Number of co-enabled transitions 27832 [2023-08-30 04:29:43,686 INFO L134 LiptonReduction]: Checked pairs total: 104044 [2023-08-30 04:29:43,687 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-30 04:29:43,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:29:43,707 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;@871617e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:29:43,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2023-08-30 04:29:43,710 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 04:29:43,710 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:29:43,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:43,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 04:29:43,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:43,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:43,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1091, now seen corresponding path program 1 times [2023-08-30 04:29:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:43,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496713659] [2023-08-30 04:29:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:29:43,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496713659] [2023-08-30 04:29:43,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496713659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:29:43,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:29:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 04:29:43,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827127353] [2023-08-30 04:29:43,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:29:43,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 04:29:43,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:29:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 04:29:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 04:29:43,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 546 [2023-08-30 04:29:43,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 148 transitions, 304 flow. Second operand has 2 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:43,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:29:43,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 546 [2023-08-30 04:29:43,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:29:44,484 INFO L130 PetriNetUnfolder]: 1475/3650 cut-off events. [2023-08-30 04:29:44,484 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:29:44,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6540 conditions, 3650 events. 1475/3650 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 27873 event pairs, 1364 based on Foata normal form. 312/2331 useless extension candidates. Maximal degree in co-relation 6413. Up to 2884 conditions per place. [2023-08-30 04:29:44,505 INFO L137 encePairwiseOnDemand]: 517/546 looper letters, 80 selfloop transitions, 0 changer transitions 0/119 dead transitions. [2023-08-30 04:29:44,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 406 flow [2023-08-30 04:29:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 04:29:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 04:29:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 655 transitions. [2023-08-30 04:29:44,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5998168498168498 [2023-08-30 04:29:44,525 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 655 transitions. [2023-08-30 04:29:44,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 655 transitions. [2023-08-30 04:29:44,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:29:44,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 655 transitions. [2023-08-30 04:29:44,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:44,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 546.0) internal successors, (1638), 3 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:44,545 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 546.0) internal successors, (1638), 3 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:44,546 INFO L175 Difference]: Start difference. First operand has 126 places, 148 transitions, 304 flow. Second operand 2 states and 655 transitions. [2023-08-30 04:29:44,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 406 flow [2023-08-30 04:29:44,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:29:44,555 INFO L231 Difference]: Finished difference. Result has 119 places, 119 transitions, 246 flow [2023-08-30 04:29:44,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=546, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=119, PETRI_TRANSITIONS=119} [2023-08-30 04:29:44,561 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -7 predicate places. [2023-08-30 04:29:44,561 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 119 transitions, 246 flow [2023-08-30 04:29:44,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:44,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:44,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:29:44,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:29:44,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:44,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 35018, now seen corresponding path program 1 times [2023-08-30 04:29:44,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:44,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215315942] [2023-08-30 04:29:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:44,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:29:44,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215315942] [2023-08-30 04:29:44,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215315942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:29:44,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:29:44,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:29:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414373562] [2023-08-30 04:29:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:29:44,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:29:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:29:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:29:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:29:45,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 546 [2023-08-30 04:29:45,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 119 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:45,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:29:45,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 546 [2023-08-30 04:29:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:29:45,553 INFO L130 PetriNetUnfolder]: 1469/3635 cut-off events. [2023-08-30 04:29:45,554 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:29:45,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 3635 events. 1469/3635 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 28015 event pairs, 1333 based on Foata normal form. 0/2014 useless extension candidates. Maximal degree in co-relation 6486. Up to 2843 conditions per place. [2023-08-30 04:29:45,572 INFO L137 encePairwiseOnDemand]: 541/546 looper letters, 81 selfloop transitions, 3 changer transitions 0/123 dead transitions. [2023-08-30 04:29:45,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 123 transitions, 422 flow [2023-08-30 04:29:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:29:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:29:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-08-30 04:29:45,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378510378510378 [2023-08-30 04:29:45,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-08-30 04:29:45,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-08-30 04:29:45,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:29:45,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-08-30 04:29:45,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:45,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:45,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:45,584 INFO L175 Difference]: Start difference. First operand has 119 places, 119 transitions, 246 flow. Second operand 3 states and 881 transitions. [2023-08-30 04:29:45,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 123 transitions, 422 flow [2023-08-30 04:29:45,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 422 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:29:45,590 INFO L231 Difference]: Finished difference. Result has 122 places, 121 transitions, 267 flow [2023-08-30 04:29:45,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=546, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2023-08-30 04:29:45,591 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -4 predicate places. [2023-08-30 04:29:45,591 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 267 flow [2023-08-30 04:29:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:45,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:45,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:29:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:29:45,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:45,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash 35019, now seen corresponding path program 1 times [2023-08-30 04:29:45,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:45,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053900605] [2023-08-30 04:29:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:45,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:29:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053900605] [2023-08-30 04:29:45,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053900605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:29:45,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:29:45,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:29:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310887453] [2023-08-30 04:29:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:29:45,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:29:45,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:29:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:29:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:29:45,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 546 [2023-08-30 04:29:45,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:45,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:29:45,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 546 [2023-08-30 04:29:45,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:29:46,221 INFO L130 PetriNetUnfolder]: 1403/3488 cut-off events. [2023-08-30 04:29:46,221 INFO L131 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2023-08-30 04:29:46,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6362 conditions, 3488 events. 1403/3488 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 26691 event pairs, 1200 based on Foata normal form. 0/2005 useless extension candidates. Maximal degree in co-relation 6356. Up to 2590 conditions per place. [2023-08-30 04:29:46,240 INFO L137 encePairwiseOnDemand]: 542/546 looper letters, 109 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2023-08-30 04:29:46,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 150 transitions, 549 flow [2023-08-30 04:29:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:29:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:29:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-30 04:29:46,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531135531135531 [2023-08-30 04:29:46,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-30 04:29:46,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-30 04:29:46,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:29:46,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-30 04:29:46,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:46,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:46,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:46,249 INFO L175 Difference]: Start difference. First operand has 122 places, 121 transitions, 267 flow. Second operand 3 states and 906 transitions. [2023-08-30 04:29:46,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 150 transitions, 549 flow [2023-08-30 04:29:46,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 150 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:29:46,285 INFO L231 Difference]: Finished difference. Result has 121 places, 119 transitions, 264 flow [2023-08-30 04:29:46,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=546, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2023-08-30 04:29:46,287 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -5 predicate places. [2023-08-30 04:29:46,287 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 264 flow [2023-08-30 04:29:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:46,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:46,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:29:46,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 04:29:46,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:46,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1044104546, now seen corresponding path program 1 times [2023-08-30 04:29:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:46,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747259220] [2023-08-30 04:29:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:46,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:29:46,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747259220] [2023-08-30 04:29:46,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747259220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:29:46,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:29:46,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:29:46,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231514841] [2023-08-30 04:29:46,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:29:46,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:29:46,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:29:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:29:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:29:46,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 546 [2023-08-30 04:29:46,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:46,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:29:46,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 546 [2023-08-30 04:29:46,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:29:47,043 INFO L130 PetriNetUnfolder]: 1357/3373 cut-off events. [2023-08-30 04:29:47,043 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-30 04:29:47,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 3373 events. 1357/3373 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25775 event pairs, 1189 based on Foata normal form. 0/1993 useless extension candidates. Maximal degree in co-relation 6179. Up to 2586 conditions per place. [2023-08-30 04:29:47,063 INFO L137 encePairwiseOnDemand]: 544/546 looper letters, 119 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2023-08-30 04:29:47,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 160 transitions, 594 flow [2023-08-30 04:29:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:29:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:29:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 934 transitions. [2023-08-30 04:29:47,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702075702075702 [2023-08-30 04:29:47,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 934 transitions. [2023-08-30 04:29:47,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 934 transitions. [2023-08-30 04:29:47,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:29:47,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 934 transitions. [2023-08-30 04:29:47,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,073 INFO L175 Difference]: Start difference. First operand has 121 places, 119 transitions, 264 flow. Second operand 3 states and 934 transitions. [2023-08-30 04:29:47,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 160 transitions, 594 flow [2023-08-30 04:29:47,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 160 transitions, 588 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:29:47,076 INFO L231 Difference]: Finished difference. Result has 120 places, 118 transitions, 262 flow [2023-08-30 04:29:47,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=546, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=120, PETRI_TRANSITIONS=118} [2023-08-30 04:29:47,077 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -6 predicate places. [2023-08-30 04:29:47,078 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 118 transitions, 262 flow [2023-08-30 04:29:47,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:47,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:29:47,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:29:47,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:47,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:47,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1044104547, now seen corresponding path program 1 times [2023-08-30 04:29:47,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:47,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99412905] [2023-08-30 04:29:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:47,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:29:47,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99412905] [2023-08-30 04:29:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99412905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:29:47,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:29:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:29:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587375538] [2023-08-30 04:29:47,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:29:47,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:29:47,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:29:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:29:47,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:29:47,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 546 [2023-08-30 04:29:47,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 118 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:29:47,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 546 [2023-08-30 04:29:47,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:29:47,666 INFO L130 PetriNetUnfolder]: 1345/3371 cut-off events. [2023-08-30 04:29:47,666 INFO L131 PetriNetUnfolder]: For 178/178 co-relation queries the response was YES. [2023-08-30 04:29:47,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6192 conditions, 3371 events. 1345/3371 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 26013 event pairs, 813 based on Foata normal form. 0/2007 useless extension candidates. Maximal degree in co-relation 6186. Up to 2471 conditions per place. [2023-08-30 04:29:47,692 INFO L137 encePairwiseOnDemand]: 542/546 looper letters, 145 selfloop transitions, 4 changer transitions 0/188 dead transitions. [2023-08-30 04:29:47,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 704 flow [2023-08-30 04:29:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:29:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:29:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 962 transitions. [2023-08-30 04:29:47,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2023-08-30 04:29:47,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 962 transitions. [2023-08-30 04:29:47,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 962 transitions. [2023-08-30 04:29:47,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:29:47,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 962 transitions. [2023-08-30 04:29:47,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 320.6666666666667) internal successors, (962), 3 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 546.0) internal successors, (2184), 4 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,702 INFO L175 Difference]: Start difference. First operand has 120 places, 118 transitions, 262 flow. Second operand 3 states and 962 transitions. [2023-08-30 04:29:47,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 704 flow [2023-08-30 04:29:47,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 702 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:29:47,707 INFO L231 Difference]: Finished difference. Result has 123 places, 120 transitions, 286 flow [2023-08-30 04:29:47,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=546, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=123, PETRI_TRANSITIONS=120} [2023-08-30 04:29:47,710 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2023-08-30 04:29:47,711 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 120 transitions, 286 flow [2023-08-30 04:29:47,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:47,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:47,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:29:47,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:29:47,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:47,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:47,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1044104943, now seen corresponding path program 1 times [2023-08-30 04:29:47,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:47,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776253126] [2023-08-30 04:29:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:47,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:29:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776253126] [2023-08-30 04:29:47,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776253126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:29:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149290619] [2023-08-30 04:29:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:47,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:29:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:29:47,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:29:47,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:29:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:29:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:29:47,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:29:48,071 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:29:48,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-30 04:29:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:48,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:29:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:29:48,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149290619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:29:48,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:29:48,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:29:48,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474771941] [2023-08-30 04:29:48,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:29:48,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:29:48,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:29:48,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:29:48,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:29:48,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 546 [2023-08-30 04:29:48,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 263.7142857142857) internal successors, (1846), 7 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:48,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:29:48,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 546 [2023-08-30 04:29:48,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:29:49,154 INFO L130 PetriNetUnfolder]: 1275/3181 cut-off events. [2023-08-30 04:29:49,154 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 04:29:49,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5863 conditions, 3181 events. 1275/3181 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 24440 event pairs, 865 based on Foata normal form. 1/1932 useless extension candidates. Maximal degree in co-relation 5856. Up to 2344 conditions per place. [2023-08-30 04:29:49,175 INFO L137 encePairwiseOnDemand]: 541/546 looper letters, 131 selfloop transitions, 6 changer transitions 0/176 dead transitions. [2023-08-30 04:29:49,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 672 flow [2023-08-30 04:29:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:29:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:29:49,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1711 transitions. [2023-08-30 04:29:49,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222832722832723 [2023-08-30 04:29:49,181 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1711 transitions. [2023-08-30 04:29:49,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1711 transitions. [2023-08-30 04:29:49,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:29:49,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1711 transitions. [2023-08-30 04:29:49,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 285.1666666666667) internal successors, (1711), 6 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:49,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 546.0) internal successors, (3822), 7 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:49,194 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 546.0) internal successors, (3822), 7 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:49,194 INFO L175 Difference]: Start difference. First operand has 123 places, 120 transitions, 286 flow. Second operand 6 states and 1711 transitions. [2023-08-30 04:29:49,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 672 flow [2023-08-30 04:29:49,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 176 transitions, 664 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:29:49,199 INFO L231 Difference]: Finished difference. Result has 125 places, 118 transitions, 282 flow [2023-08-30 04:29:49,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=546, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=125, PETRI_TRANSITIONS=118} [2023-08-30 04:29:49,202 INFO L281 CegarLoopForPetriNet]: 126 programPoint places, -1 predicate places. [2023-08-30 04:29:49,202 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 118 transitions, 282 flow [2023-08-30 04:29:49,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 263.7142857142857) internal successors, (1846), 7 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:29:49,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:29:49,204 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:29:49,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:29:49,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-30 04:29:49,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2023-08-30 04:29:49,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:29:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1992484251, now seen corresponding path program 1 times [2023-08-30 04:29:49,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:29:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703347237] [2023-08-30 04:29:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:29:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:29:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:29:49,453 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:29:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:29:49,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:29:49,495 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:29:49,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (82 of 83 remaining) [2023-08-30 04:29:49,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 83 remaining) [2023-08-30 04:29:49,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 83 remaining) [2023-08-30 04:29:49,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 83 remaining) [2023-08-30 04:29:49,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 83 remaining) [2023-08-30 04:29:49,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 83 remaining) [2023-08-30 04:29:49,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 83 remaining) [2023-08-30 04:29:49,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 83 remaining) [2023-08-30 04:29:49,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 83 remaining) [2023-08-30 04:29:49,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 83 remaining) [2023-08-30 04:29:49,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 83 remaining) [2023-08-30 04:29:49,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 83 remaining) [2023-08-30 04:29:49,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 83 remaining) [2023-08-30 04:29:49,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 83 remaining) [2023-08-30 04:29:49,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 83 remaining) [2023-08-30 04:29:49,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 83 remaining) [2023-08-30 04:29:49,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 83 remaining) [2023-08-30 04:29:49,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 83 remaining) [2023-08-30 04:29:49,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 83 remaining) [2023-08-30 04:29:49,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 83 remaining) [2023-08-30 04:29:49,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 83 remaining) [2023-08-30 04:29:49,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 83 remaining) [2023-08-30 04:29:49,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 83 remaining) [2023-08-30 04:29:49,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 83 remaining) [2023-08-30 04:29:49,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 83 remaining) [2023-08-30 04:29:49,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 83 remaining) [2023-08-30 04:29:49,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 83 remaining) [2023-08-30 04:29:49,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 83 remaining) [2023-08-30 04:29:49,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 83 remaining) [2023-08-30 04:29:49,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK (53 of 83 remaining) [2023-08-30 04:29:49,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 83 remaining) [2023-08-30 04:29:49,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 83 remaining) [2023-08-30 04:29:49,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 83 remaining) [2023-08-30 04:29:49,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 83 remaining) [2023-08-30 04:29:49,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 83 remaining) [2023-08-30 04:29:49,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 83 remaining) [2023-08-30 04:29:49,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 83 remaining) [2023-08-30 04:29:49,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 83 remaining) [2023-08-30 04:29:49,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 83 remaining) [2023-08-30 04:29:49,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 83 remaining) [2023-08-30 04:29:49,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK (42 of 83 remaining) [2023-08-30 04:29:49,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 83 remaining) [2023-08-30 04:29:49,506 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 83 remaining) [2023-08-30 04:29:49,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 83 remaining) [2023-08-30 04:29:49,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 83 remaining) [2023-08-30 04:29:49,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 83 remaining) [2023-08-30 04:29:49,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 83 remaining) [2023-08-30 04:29:49,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 83 remaining) [2023-08-30 04:29:49,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 83 remaining) [2023-08-30 04:29:49,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 83 remaining) [2023-08-30 04:29:49,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 83 remaining) [2023-08-30 04:29:49,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 83 remaining) [2023-08-30 04:29:49,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 83 remaining) [2023-08-30 04:29:49,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 83 remaining) [2023-08-30 04:29:49,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 83 remaining) [2023-08-30 04:29:49,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 83 remaining) [2023-08-30 04:29:49,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 83 remaining) [2023-08-30 04:29:49,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 83 remaining) [2023-08-30 04:29:49,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 83 remaining) [2023-08-30 04:29:49,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 83 remaining) [2023-08-30 04:29:49,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 83 remaining) [2023-08-30 04:29:49,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (21 of 83 remaining) [2023-08-30 04:29:49,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 83 remaining) [2023-08-30 04:29:49,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 83 remaining) [2023-08-30 04:29:49,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 83 remaining) [2023-08-30 04:29:49,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 83 remaining) [2023-08-30 04:29:49,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 83 remaining) [2023-08-30 04:29:49,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 83 remaining) [2023-08-30 04:29:49,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 83 remaining) [2023-08-30 04:29:49,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 83 remaining) [2023-08-30 04:29:49,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 83 remaining) [2023-08-30 04:29:49,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 83 remaining) [2023-08-30 04:29:49,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 83 remaining) [2023-08-30 04:29:49,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 83 remaining) [2023-08-30 04:29:49,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 83 remaining) [2023-08-30 04:29:49,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 83 remaining) [2023-08-30 04:29:49,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 83 remaining) [2023-08-30 04:29:49,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 83 remaining) [2023-08-30 04:29:49,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 83 remaining) [2023-08-30 04:29:49,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 83 remaining) [2023-08-30 04:29:49,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 83 remaining) [2023-08-30 04:29:49,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 83 remaining) [2023-08-30 04:29:49,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 83 remaining) [2023-08-30 04:29:49,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:29:49,517 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:29:49,519 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:29:49,519 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:29:49,583 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:29:49,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 365 places, 402 transitions, 822 flow [2023-08-30 04:29:49,676 INFO L130 PetriNetUnfolder]: 76/703 cut-off events. [2023-08-30 04:29:49,676 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:29:49,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 703 events. 76/703 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3382 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 440. Up to 12 conditions per place. [2023-08-30 04:29:49,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 365 places, 402 transitions, 822 flow [2023-08-30 04:29:49,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 365 places, 402 transitions, 822 flow [2023-08-30 04:29:49,694 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:29:49,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 365 places, 402 transitions, 822 flow [2023-08-30 04:29:49,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 365 places, 402 transitions, 822 flow [2023-08-30 04:29:49,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 365 places, 402 transitions, 822 flow [2023-08-30 04:29:49,800 INFO L130 PetriNetUnfolder]: 76/703 cut-off events. [2023-08-30 04:29:49,800 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:29:49,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 703 events. 76/703 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3382 event pairs, 0 based on Foata normal form. 0/474 useless extension candidates. Maximal degree in co-relation 440. Up to 12 conditions per place. [2023-08-30 04:29:49,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 77028 [2023-08-30 04:30:08,319 INFO L134 LiptonReduction]: Checked pairs total: 361368 [2023-08-30 04:30:08,319 INFO L136 LiptonReduction]: Total number of compositions: 329 [2023-08-30 04:30:08,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:30:08,321 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;@871617e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:30:08,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-08-30 04:30:08,322 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 04:30:08,322 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:30:08,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:30:08,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 04:30:08,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:30:08,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:30:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1917, now seen corresponding path program 1 times [2023-08-30 04:30:08,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:30:08,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127682623] [2023-08-30 04:30:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:30:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:08,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:30:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127682623] [2023-08-30 04:30:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127682623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:30:08,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:30:08,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 04:30:08,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587870207] [2023-08-30 04:30:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:30:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 04:30:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:30:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 04:30:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 04:30:08,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 731 [2023-08-30 04:30:08,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 209 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 359.5) internal successors, (719), 2 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:08,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:30:08,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 731 [2023-08-30 04:30:08,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:30:17,611 INFO L130 PetriNetUnfolder]: 88566/153588 cut-off events. [2023-08-30 04:30:17,611 INFO L131 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2023-08-30 04:30:17,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283678 conditions, 153588 events. 88566/153588 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 3712. Compared 1524095 event pairs, 84052 based on Foata normal form. 13658/103612 useless extension candidates. Maximal degree in co-relation 233805. Up to 129910 conditions per place. [2023-08-30 04:30:18,453 INFO L137 encePairwiseOnDemand]: 691/731 looper letters, 111 selfloop transitions, 0 changer transitions 0/169 dead transitions. [2023-08-30 04:30:18,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 578 flow [2023-08-30 04:30:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 04:30:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 04:30:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 869 transitions. [2023-08-30 04:30:18,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594391244870041 [2023-08-30 04:30:18,457 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 869 transitions. [2023-08-30 04:30:18,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 869 transitions. [2023-08-30 04:30:18,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:30:18,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 869 transitions. [2023-08-30 04:30:18,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 434.5) internal successors, (869), 2 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:18,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 731.0) internal successors, (2193), 3 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:18,464 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 731.0) internal successors, (2193), 3 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:18,464 INFO L175 Difference]: Start difference. First operand has 176 places, 209 transitions, 436 flow. Second operand 2 states and 869 transitions. [2023-08-30 04:30:18,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 578 flow [2023-08-30 04:30:18,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 169 transitions, 578 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:30:18,471 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 356 flow [2023-08-30 04:30:18,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=356, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2023-08-30 04:30:18,472 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -7 predicate places. [2023-08-30 04:30:18,473 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 356 flow [2023-08-30 04:30:18,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 359.5) internal successors, (719), 2 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:18,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:30:18,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:30:18,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:30:18,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:30:18,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:30:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash 61618, now seen corresponding path program 1 times [2023-08-30 04:30:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:30:18,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982381677] [2023-08-30 04:30:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:30:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:30:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982381677] [2023-08-30 04:30:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982381677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:30:18,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:30:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:30:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671354259] [2023-08-30 04:30:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:30:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:30:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:30:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:30:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:30:18,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 731 [2023-08-30 04:30:18,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:18,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:30:18,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 731 [2023-08-30 04:30:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:30:27,648 INFO L130 PetriNetUnfolder]: 84534/147497 cut-off events. [2023-08-30 04:30:27,648 INFO L131 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2023-08-30 04:30:27,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271781 conditions, 147497 events. 84534/147497 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 3572. Compared 1471546 event pairs, 76432 based on Foata normal form. 0/87352 useless extension candidates. Maximal degree in co-relation 271776. Up to 118238 conditions per place. [2023-08-30 04:30:28,458 INFO L137 encePairwiseOnDemand]: 727/731 looper letters, 167 selfloop transitions, 2 changer transitions 0/227 dead transitions. [2023-08-30 04:30:28,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 227 transitions, 810 flow [2023-08-30 04:30:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:30:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:30:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1224 transitions. [2023-08-30 04:30:28,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2023-08-30 04:30:28,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1224 transitions. [2023-08-30 04:30:28,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1224 transitions. [2023-08-30 04:30:28,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:30:28,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1224 transitions. [2023-08-30 04:30:28,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 408.0) internal successors, (1224), 3 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:28,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:28,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:28,472 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 356 flow. Second operand 3 states and 1224 transitions. [2023-08-30 04:30:28,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 227 transitions, 810 flow [2023-08-30 04:30:28,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 227 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:30:28,480 INFO L231 Difference]: Finished difference. Result has 169 places, 167 transitions, 356 flow [2023-08-30 04:30:28,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=169, PETRI_TRANSITIONS=167} [2023-08-30 04:30:28,482 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -7 predicate places. [2023-08-30 04:30:28,482 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 167 transitions, 356 flow [2023-08-30 04:30:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:28,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:30:28,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:30:28,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:30:28,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:30:28,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:30:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash 61616, now seen corresponding path program 1 times [2023-08-30 04:30:28,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:30:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128947218] [2023-08-30 04:30:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:28,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:30:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:28,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:30:28,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128947218] [2023-08-30 04:30:28,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128947218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:30:28,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:30:28,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:30:28,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101425225] [2023-08-30 04:30:28,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:30:28,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:30:28,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:30:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:30:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:30:28,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 731 [2023-08-30 04:30:28,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 167 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:28,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:30:28,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 731 [2023-08-30 04:30:28,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:30:37,615 INFO L130 PetriNetUnfolder]: 84531/147927 cut-off events. [2023-08-30 04:30:37,615 INFO L131 PetriNetUnfolder]: For 721/721 co-relation queries the response was YES. [2023-08-30 04:30:37,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273196 conditions, 147927 events. 84531/147927 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 3686. Compared 1482839 event pairs, 78966 based on Foata normal form. 0/88664 useless extension candidates. Maximal degree in co-relation 273190. Up to 124063 conditions per place. [2023-08-30 04:30:38,251 INFO L137 encePairwiseOnDemand]: 726/731 looper letters, 109 selfloop transitions, 3 changer transitions 0/170 dead transitions. [2023-08-30 04:30:38,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 170 transitions, 586 flow [2023-08-30 04:30:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:30:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:30:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1164 transitions. [2023-08-30 04:30:38,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53077975376197 [2023-08-30 04:30:38,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1164 transitions. [2023-08-30 04:30:38,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1164 transitions. [2023-08-30 04:30:38,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:30:38,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1164 transitions. [2023-08-30 04:30:38,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:38,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:38,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:38,262 INFO L175 Difference]: Start difference. First operand has 169 places, 167 transitions, 356 flow. Second operand 3 states and 1164 transitions. [2023-08-30 04:30:38,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 170 transitions, 586 flow [2023-08-30 04:30:38,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 170 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:30:38,372 INFO L231 Difference]: Finished difference. Result has 170 places, 169 transitions, 373 flow [2023-08-30 04:30:38,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=373, PETRI_PLACES=170, PETRI_TRANSITIONS=169} [2023-08-30 04:30:38,372 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -6 predicate places. [2023-08-30 04:30:38,372 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 169 transitions, 373 flow [2023-08-30 04:30:38,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:30:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:30:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:30:38,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:30:38,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:30:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1837196104, now seen corresponding path program 1 times [2023-08-30 04:30:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:30:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672373412] [2023-08-30 04:30:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:30:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:30:38,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672373412] [2023-08-30 04:30:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672373412] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:30:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:30:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:30:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18096312] [2023-08-30 04:30:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:30:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:30:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:30:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:30:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:30:38,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 731 [2023-08-30 04:30:38,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 169 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:38,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:30:38,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 731 [2023-08-30 04:30:38,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:30:46,192 INFO L130 PetriNetUnfolder]: 69117/121651 cut-off events. [2023-08-30 04:30:46,193 INFO L131 PetriNetUnfolder]: For 3009/3009 co-relation queries the response was YES. [2023-08-30 04:30:46,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226862 conditions, 121651 events. 69117/121651 cut-off events. For 3009/3009 co-relation queries the response was YES. Maximal size of possible extension queue 2975. Compared 1195315 event pairs, 53269 based on Foata normal form. 0/77277 useless extension candidates. Maximal degree in co-relation 226855. Up to 98837 conditions per place. [2023-08-30 04:30:46,671 INFO L137 encePairwiseOnDemand]: 724/731 looper letters, 177 selfloop transitions, 2 changer transitions 0/237 dead transitions. [2023-08-30 04:30:46,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 237 transitions, 881 flow [2023-08-30 04:30:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:30:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:30:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1239 transitions. [2023-08-30 04:30:46,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649794801641587 [2023-08-30 04:30:46,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1239 transitions. [2023-08-30 04:30:46,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1239 transitions. [2023-08-30 04:30:46,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:30:46,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1239 transitions. [2023-08-30 04:30:46,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 413.0) internal successors, (1239), 3 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:46,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:46,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:46,680 INFO L175 Difference]: Start difference. First operand has 170 places, 169 transitions, 373 flow. Second operand 3 states and 1239 transitions. [2023-08-30 04:30:46,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 237 transitions, 881 flow [2023-08-30 04:30:46,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 878 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:30:46,685 INFO L231 Difference]: Finished difference. Result has 165 places, 163 transitions, 362 flow [2023-08-30 04:30:46,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=165, PETRI_TRANSITIONS=163} [2023-08-30 04:30:46,686 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -11 predicate places. [2023-08-30 04:30:46,686 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 163 transitions, 362 flow [2023-08-30 04:30:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:46,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:30:46,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:30:46,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 04:30:46,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:30:46,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:30:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1837196105, now seen corresponding path program 1 times [2023-08-30 04:30:46,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:30:46,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058220810] [2023-08-30 04:30:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:46,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:30:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:46,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:30:46,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058220810] [2023-08-30 04:30:46,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058220810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:30:46,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:30:46,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:30:46,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006857822] [2023-08-30 04:30:46,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:30:46,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:30:46,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:30:46,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:30:46,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:30:46,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 731 [2023-08-30 04:30:46,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 163 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:46,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:30:46,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 731 [2023-08-30 04:30:46,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:30:53,113 INFO L130 PetriNetUnfolder]: 55258/98194 cut-off events. [2023-08-30 04:30:53,114 INFO L131 PetriNetUnfolder]: For 5115/5115 co-relation queries the response was YES. [2023-08-30 04:30:53,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185138 conditions, 98194 events. 55258/98194 cut-off events. For 5115/5115 co-relation queries the response was YES. Maximal size of possible extension queue 2237. Compared 951004 event pairs, 25117 based on Foata normal form. 0/67879 useless extension candidates. Maximal degree in co-relation 185131. Up to 75813 conditions per place. [2023-08-30 04:30:53,497 INFO L137 encePairwiseOnDemand]: 716/731 looper letters, 188 selfloop transitions, 10 changer transitions 0/256 dead transitions. [2023-08-30 04:30:53,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 256 transitions, 958 flow [2023-08-30 04:30:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:30:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:30:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1243 transitions. [2023-08-30 04:30:53,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5668034655722755 [2023-08-30 04:30:53,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1243 transitions. [2023-08-30 04:30:53,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1243 transitions. [2023-08-30 04:30:53,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:30:53,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1243 transitions. [2023-08-30 04:30:53,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 414.3333333333333) internal successors, (1243), 3 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:53,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:53,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:53,508 INFO L175 Difference]: Start difference. First operand has 165 places, 163 transitions, 362 flow. Second operand 3 states and 1243 transitions. [2023-08-30 04:30:53,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 256 transitions, 958 flow [2023-08-30 04:30:53,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 256 transitions, 956 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:30:53,514 INFO L231 Difference]: Finished difference. Result has 168 places, 171 transitions, 444 flow [2023-08-30 04:30:53,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=168, PETRI_TRANSITIONS=171} [2023-08-30 04:30:53,515 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -8 predicate places. [2023-08-30 04:30:53,515 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 171 transitions, 444 flow [2023-08-30 04:30:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:53,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:30:53,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:30:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:30:53,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:30:53,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:30:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1117969862, now seen corresponding path program 1 times [2023-08-30 04:30:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:30:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147030562] [2023-08-30 04:30:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:30:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:53,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:30:53,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147030562] [2023-08-30 04:30:53,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147030562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:30:53,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280205522] [2023-08-30 04:30:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:30:53,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:30:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:30:53,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:30:53,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:30:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:30:53,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:30:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:30:53,750 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:30:53,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-30 04:30:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:53,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:30:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:30:53,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280205522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:30:53,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:30:53,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:30:53,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880726444] [2023-08-30 04:30:53,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:30:53,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:30:53,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:30:53,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:30:53,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:30:54,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 731 [2023-08-30 04:30:54,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 171 transitions, 444 flow. Second operand has 7 states, 7 states have (on average 348.7142857142857) internal successors, (2441), 7 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:30:54,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:30:54,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 731 [2023-08-30 04:30:54,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:00,731 INFO L130 PetriNetUnfolder]: 55566/101660 cut-off events. [2023-08-30 04:31:00,731 INFO L131 PetriNetUnfolder]: For 18562/18564 co-relation queries the response was YES. [2023-08-30 04:31:00,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203995 conditions, 101660 events. 55566/101660 cut-off events. For 18562/18564 co-relation queries the response was YES. Maximal size of possible extension queue 2543. Compared 1031185 event pairs, 24459 based on Foata normal form. 3/69884 useless extension candidates. Maximal degree in co-relation 203987. Up to 81496 conditions per place. [2023-08-30 04:31:01,153 INFO L137 encePairwiseOnDemand]: 724/731 looper letters, 179 selfloop transitions, 15 changer transitions 0/252 dead transitions. [2023-08-30 04:31:01,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 252 transitions, 1058 flow [2023-08-30 04:31:01,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:31:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:31:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2272 transitions. [2023-08-30 04:31:01,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180118559051528 [2023-08-30 04:31:01,158 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2272 transitions. [2023-08-30 04:31:01,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2272 transitions. [2023-08-30 04:31:01,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:01,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2272 transitions. [2023-08-30 04:31:01,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 378.6666666666667) internal successors, (2272), 6 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:01,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 731.0) internal successors, (5117), 7 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:01,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 731.0) internal successors, (5117), 7 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:01,170 INFO L175 Difference]: Start difference. First operand has 168 places, 171 transitions, 444 flow. Second operand 6 states and 2272 transitions. [2023-08-30 04:31:01,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 252 transitions, 1058 flow [2023-08-30 04:31:01,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 252 transitions, 1032 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:31:01,194 INFO L231 Difference]: Finished difference. Result has 175 places, 183 transitions, 546 flow [2023-08-30 04:31:01,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=175, PETRI_TRANSITIONS=183} [2023-08-30 04:31:01,195 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -1 predicate places. [2023-08-30 04:31:01,195 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 183 transitions, 546 flow [2023-08-30 04:31:01,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 348.7142857142857) internal successors, (2441), 7 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:01,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:01,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:31:01,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:31:01,401 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,SelfDestructingSolverStorable12 [2023-08-30 04:31:01,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:01,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1118505727, now seen corresponding path program 1 times [2023-08-30 04:31:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:01,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645465553] [2023-08-30 04:31:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:01,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645465553] [2023-08-30 04:31:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645465553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:01,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:01,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:31:01,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661675400] [2023-08-30 04:31:01,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:01,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:31:01,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:31:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:31:01,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 731 [2023-08-30 04:31:01,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 183 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:01,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:01,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 731 [2023-08-30 04:31:01,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:08,800 INFO L130 PetriNetUnfolder]: 60359/107934 cut-off events. [2023-08-30 04:31:08,800 INFO L131 PetriNetUnfolder]: For 28569/28569 co-relation queries the response was YES. [2023-08-30 04:31:09,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222699 conditions, 107934 events. 60359/107934 cut-off events. For 28569/28569 co-relation queries the response was YES. Maximal size of possible extension queue 2445. Compared 1060636 event pairs, 21790 based on Foata normal form. 0/76740 useless extension candidates. Maximal degree in co-relation 222688. Up to 78339 conditions per place. [2023-08-30 04:31:09,330 INFO L137 encePairwiseOnDemand]: 727/731 looper letters, 223 selfloop transitions, 4 changer transitions 0/283 dead transitions. [2023-08-30 04:31:09,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 283 transitions, 1272 flow [2023-08-30 04:31:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:31:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:31:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1257 transitions. [2023-08-30 04:31:09,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573187414500684 [2023-08-30 04:31:09,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1257 transitions. [2023-08-30 04:31:09,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1257 transitions. [2023-08-30 04:31:09,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:09,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1257 transitions. [2023-08-30 04:31:09,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 419.0) internal successors, (1257), 3 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:09,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:09,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:09,340 INFO L175 Difference]: Start difference. First operand has 175 places, 183 transitions, 546 flow. Second operand 3 states and 1257 transitions. [2023-08-30 04:31:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 283 transitions, 1272 flow [2023-08-30 04:31:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 1247 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-30 04:31:09,354 INFO L231 Difference]: Finished difference. Result has 178 places, 185 transitions, 555 flow [2023-08-30 04:31:09,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=178, PETRI_TRANSITIONS=185} [2023-08-30 04:31:09,355 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, 2 predicate places. [2023-08-30 04:31:09,355 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 185 transitions, 555 flow [2023-08-30 04:31:09,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:09,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:09,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:31:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:31:09,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:09,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1118505728, now seen corresponding path program 1 times [2023-08-30 04:31:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358578685] [2023-08-30 04:31:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:09,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358578685] [2023-08-30 04:31:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358578685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:09,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:09,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:31:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134847968] [2023-08-30 04:31:09,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:31:09,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:31:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:31:09,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 731 [2023-08-30 04:31:09,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 185 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 349.5) internal successors, (1398), 4 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:09,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:09,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 731 [2023-08-30 04:31:09,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:16,978 INFO L130 PetriNetUnfolder]: 57348/105604 cut-off events. [2023-08-30 04:31:16,978 INFO L131 PetriNetUnfolder]: For 35666/35726 co-relation queries the response was YES. [2023-08-30 04:31:17,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221217 conditions, 105604 events. 57348/105604 cut-off events. For 35666/35726 co-relation queries the response was YES. Maximal size of possible extension queue 2421. Compared 1089197 event pairs, 4038 based on Foata normal form. 1379/77160 useless extension candidates. Maximal degree in co-relation 221204. Up to 80052 conditions per place. [2023-08-30 04:31:17,510 INFO L137 encePairwiseOnDemand]: 727/731 looper letters, 270 selfloop transitions, 8 changer transitions 0/336 dead transitions. [2023-08-30 04:31:17,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 336 transitions, 1493 flow [2023-08-30 04:31:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:31:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:31:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1644 transitions. [2023-08-30 04:31:17,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622435020519836 [2023-08-30 04:31:17,514 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1644 transitions. [2023-08-30 04:31:17,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1644 transitions. [2023-08-30 04:31:17,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:17,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1644 transitions. [2023-08-30 04:31:17,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:17,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 731.0) internal successors, (3655), 5 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:17,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 731.0) internal successors, (3655), 5 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:17,522 INFO L175 Difference]: Start difference. First operand has 178 places, 185 transitions, 555 flow. Second operand 4 states and 1644 transitions. [2023-08-30 04:31:17,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 336 transitions, 1493 flow [2023-08-30 04:31:17,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 336 transitions, 1485 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:31:17,553 INFO L231 Difference]: Finished difference. Result has 178 places, 184 transitions, 561 flow [2023-08-30 04:31:17,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=561, PETRI_PLACES=178, PETRI_TRANSITIONS=184} [2023-08-30 04:31:17,554 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, 2 predicate places. [2023-08-30 04:31:17,554 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 184 transitions, 561 flow [2023-08-30 04:31:17,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 349.5) internal successors, (1398), 4 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:17,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:17,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:31:17,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:17,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash 626609807, now seen corresponding path program 1 times [2023-08-30 04:31:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:17,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489017342] [2023-08-30 04:31:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489017342] [2023-08-30 04:31:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489017342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:31:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814868889] [2023-08-30 04:31:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:17,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:31:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:31:17,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:31:17,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:31:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:31:17,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:31:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:17,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:31:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:17,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814868889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:31:17,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:31:17,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:31:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251469189] [2023-08-30 04:31:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:31:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:31:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:31:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:31:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 731 [2023-08-30 04:31:17,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 184 transitions, 561 flow. Second operand has 7 states, 7 states have (on average 356.57142857142856) internal successors, (2496), 7 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:17,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:17,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 731 [2023-08-30 04:31:17,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:18,555 INFO L130 PetriNetUnfolder]: 4752/9174 cut-off events. [2023-08-30 04:31:18,555 INFO L131 PetriNetUnfolder]: For 7078/7080 co-relation queries the response was YES. [2023-08-30 04:31:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 9174 events. 4752/9174 cut-off events. For 7078/7080 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 71935 event pairs, 390 based on Foata normal form. 629/8076 useless extension candidates. Maximal degree in co-relation 25388. Up to 6494 conditions per place. [2023-08-30 04:31:18,590 INFO L137 encePairwiseOnDemand]: 728/731 looper letters, 129 selfloop transitions, 6 changer transitions 0/167 dead transitions. [2023-08-30 04:31:18,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 786 flow [2023-08-30 04:31:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:31:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:31:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1897 transitions. [2023-08-30 04:31:18,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190150478796169 [2023-08-30 04:31:18,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1897 transitions. [2023-08-30 04:31:18,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1897 transitions. [2023-08-30 04:31:18,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:18,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1897 transitions. [2023-08-30 04:31:18,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 379.4) internal successors, (1897), 5 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:18,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:18,602 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:18,602 INFO L175 Difference]: Start difference. First operand has 178 places, 184 transitions, 561 flow. Second operand 5 states and 1897 transitions. [2023-08-30 04:31:18,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 786 flow [2023-08-30 04:31:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 707 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-30 04:31:18,629 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 296 flow [2023-08-30 04:31:18,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2023-08-30 04:31:18,630 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -70 predicate places. [2023-08-30 04:31:18,630 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 296 flow [2023-08-30 04:31:18,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 356.57142857142856) internal successors, (2496), 7 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:18,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:18,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:18,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:31:18,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:31:18,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:18,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1142237155, now seen corresponding path program 1 times [2023-08-30 04:31:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292618818] [2023-08-30 04:31:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:18,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292618818] [2023-08-30 04:31:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292618818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:19,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:19,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:31:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381868552] [2023-08-30 04:31:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:19,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:31:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:31:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:31:19,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 731 [2023-08-30 04:31:19,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 344.1666666666667) internal successors, (2065), 6 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:19,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:19,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 731 [2023-08-30 04:31:19,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:20,309 INFO L130 PetriNetUnfolder]: 4613/9315 cut-off events. [2023-08-30 04:31:20,310 INFO L131 PetriNetUnfolder]: For 11600/11600 co-relation queries the response was YES. [2023-08-30 04:31:20,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22840 conditions, 9315 events. 4613/9315 cut-off events. For 11600/11600 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 74753 event pairs, 415 based on Foata normal form. 0/7518 useless extension candidates. Maximal degree in co-relation 22829. Up to 6426 conditions per place. [2023-08-30 04:31:20,339 INFO L137 encePairwiseOnDemand]: 728/731 looper letters, 99 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-30 04:31:20,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 133 transitions, 611 flow [2023-08-30 04:31:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:31:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:31:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1458 transitions. [2023-08-30 04:31:20,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49863201094391246 [2023-08-30 04:31:20,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1458 transitions. [2023-08-30 04:31:20,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1458 transitions. [2023-08-30 04:31:20,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:20,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1458 transitions. [2023-08-30 04:31:20,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 364.5) internal successors, (1458), 4 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:20,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 731.0) internal successors, (3655), 5 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:20,350 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 731.0) internal successors, (3655), 5 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:20,350 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 296 flow. Second operand 4 states and 1458 transitions. [2023-08-30 04:31:20,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 133 transitions, 611 flow [2023-08-30 04:31:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 133 transitions, 606 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 04:31:20,355 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 295 flow [2023-08-30 04:31:20,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2023-08-30 04:31:20,355 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -69 predicate places. [2023-08-30 04:31:20,356 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 295 flow [2023-08-30 04:31:20,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 344.1666666666667) internal successors, (2065), 6 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:20,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:20,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:20,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:31:20,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:20,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1142237156, now seen corresponding path program 1 times [2023-08-30 04:31:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:20,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842330660] [2023-08-30 04:31:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:20,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:20,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842330660] [2023-08-30 04:31:20,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842330660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:20,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:20,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:31:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712839983] [2023-08-30 04:31:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:31:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:31:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:31:21,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 731 [2023-08-30 04:31:21,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 347.1666666666667) internal successors, (2083), 6 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:21,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:21,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 731 [2023-08-30 04:31:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:22,373 INFO L130 PetriNetUnfolder]: 8049/16409 cut-off events. [2023-08-30 04:31:22,373 INFO L131 PetriNetUnfolder]: For 17247/17247 co-relation queries the response was YES. [2023-08-30 04:31:22,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38759 conditions, 16409 events. 8049/16409 cut-off events. For 17247/17247 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 148289 event pairs, 1430 based on Foata normal form. 0/13051 useless extension candidates. Maximal degree in co-relation 38748. Up to 6657 conditions per place. [2023-08-30 04:31:22,441 INFO L137 encePairwiseOnDemand]: 725/731 looper letters, 138 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2023-08-30 04:31:22,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 823 flow [2023-08-30 04:31:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:31:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:31:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1863 transitions. [2023-08-30 04:31:22,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097127222982216 [2023-08-30 04:31:22,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1863 transitions. [2023-08-30 04:31:22,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1863 transitions. [2023-08-30 04:31:22,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:22,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1863 transitions. [2023-08-30 04:31:22,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 372.6) internal successors, (1863), 5 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:22,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:22,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:22,452 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 295 flow. Second operand 5 states and 1863 transitions. [2023-08-30 04:31:22,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 823 flow [2023-08-30 04:31:22,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 820 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:31:22,464 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 345 flow [2023-08-30 04:31:22,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2023-08-30 04:31:22,464 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -65 predicate places. [2023-08-30 04:31:22,465 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 345 flow [2023-08-30 04:31:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 347.1666666666667) internal successors, (2083), 6 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:22,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:22,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:22,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:31:22,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:22,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2029626490, now seen corresponding path program 1 times [2023-08-30 04:31:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:22,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641791890] [2023-08-30 04:31:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:31:22,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:22,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641791890] [2023-08-30 04:31:22,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641791890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:22,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:22,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:31:22,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208451681] [2023-08-30 04:31:22,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:22,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:31:22,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:31:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:31:22,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 731 [2023-08-30 04:31:22,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 100 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:22,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:22,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 731 [2023-08-30 04:31:22,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:23,818 INFO L130 PetriNetUnfolder]: 7843/15871 cut-off events. [2023-08-30 04:31:23,819 INFO L131 PetriNetUnfolder]: For 18964/18964 co-relation queries the response was YES. [2023-08-30 04:31:23,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38599 conditions, 15871 events. 7843/15871 cut-off events. For 18964/18964 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 141054 event pairs, 3501 based on Foata normal form. 0/12771 useless extension candidates. Maximal degree in co-relation 38586. Up to 12279 conditions per place. [2023-08-30 04:31:23,899 INFO L137 encePairwiseOnDemand]: 729/731 looper letters, 81 selfloop transitions, 6 changer transitions 0/119 dead transitions. [2023-08-30 04:31:23,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 583 flow [2023-08-30 04:31:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:31:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:31:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1148 transitions. [2023-08-30 04:31:23,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523483812129503 [2023-08-30 04:31:23,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1148 transitions. [2023-08-30 04:31:23,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1148 transitions. [2023-08-30 04:31:23,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:23,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1148 transitions. [2023-08-30 04:31:23,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.6666666666667) internal successors, (1148), 3 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:23,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:23,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:23,906 INFO L175 Difference]: Start difference. First operand has 111 places, 100 transitions, 345 flow. Second operand 3 states and 1148 transitions. [2023-08-30 04:31:23,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 583 flow [2023-08-30 04:31:23,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 119 transitions, 576 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:31:23,911 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 348 flow [2023-08-30 04:31:23,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2023-08-30 04:31:23,912 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -66 predicate places. [2023-08-30 04:31:23,912 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 348 flow [2023-08-30 04:31:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:23,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:23,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:23,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 04:31:23,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:23,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2029626491, now seen corresponding path program 1 times [2023-08-30 04:31:23,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:23,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67510538] [2023-08-30 04:31:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:23,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:31:23,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:23,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67510538] [2023-08-30 04:31:23,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67510538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:23,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:31:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785223804] [2023-08-30 04:31:23,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:23,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:31:23,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:31:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:31:24,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 731 [2023-08-30 04:31:24,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:24,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:24,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 731 [2023-08-30 04:31:24,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:25,133 INFO L130 PetriNetUnfolder]: 7560/15341 cut-off events. [2023-08-30 04:31:25,133 INFO L131 PetriNetUnfolder]: For 18180/18180 co-relation queries the response was YES. [2023-08-30 04:31:25,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37335 conditions, 15341 events. 7560/15341 cut-off events. For 18180/18180 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 136206 event pairs, 3346 based on Foata normal form. 0/12462 useless extension candidates. Maximal degree in co-relation 37322. Up to 11821 conditions per place. [2023-08-30 04:31:25,201 INFO L137 encePairwiseOnDemand]: 729/731 looper letters, 80 selfloop transitions, 6 changer transitions 0/118 dead transitions. [2023-08-30 04:31:25,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 118 transitions, 584 flow [2023-08-30 04:31:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:31:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:31:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1144 transitions. [2023-08-30 04:31:25,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216598267213862 [2023-08-30 04:31:25,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1144 transitions. [2023-08-30 04:31:25,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1144 transitions. [2023-08-30 04:31:25,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:25,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1144 transitions. [2023-08-30 04:31:25,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:25,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:25,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:25,207 INFO L175 Difference]: Start difference. First operand has 110 places, 99 transitions, 348 flow. Second operand 3 states and 1144 transitions. [2023-08-30 04:31:25,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 118 transitions, 584 flow [2023-08-30 04:31:25,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:31:25,211 INFO L231 Difference]: Finished difference. Result has 110 places, 98 transitions, 352 flow [2023-08-30 04:31:25,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=110, PETRI_TRANSITIONS=98} [2023-08-30 04:31:25,211 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -66 predicate places. [2023-08-30 04:31:25,211 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 98 transitions, 352 flow [2023-08-30 04:31:25,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:25,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:25,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 04:31:25,212 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:25,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1049614801, now seen corresponding path program 1 times [2023-08-30 04:31:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:25,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840231633] [2023-08-30 04:31:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:25,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840231633] [2023-08-30 04:31:25,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840231633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:25,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:25,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:31:25,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620137690] [2023-08-30 04:31:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:25,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:31:25,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:31:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:31:25,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 342 out of 731 [2023-08-30 04:31:25,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 98 transitions, 352 flow. Second operand has 5 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:25,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:25,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 342 of 731 [2023-08-30 04:31:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:26,881 INFO L130 PetriNetUnfolder]: 7548/15087 cut-off events. [2023-08-30 04:31:26,881 INFO L131 PetriNetUnfolder]: For 18139/18139 co-relation queries the response was YES. [2023-08-30 04:31:26,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37138 conditions, 15087 events. 7548/15087 cut-off events. For 18139/18139 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 132037 event pairs, 2506 based on Foata normal form. 0/12552 useless extension candidates. Maximal degree in co-relation 37125. Up to 10608 conditions per place. [2023-08-30 04:31:26,945 INFO L137 encePairwiseOnDemand]: 726/731 looper letters, 153 selfloop transitions, 9 changer transitions 0/193 dead transitions. [2023-08-30 04:31:26,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 193 transitions, 981 flow [2023-08-30 04:31:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:31:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:31:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1852 transitions. [2023-08-30 04:31:26,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506703146374829 [2023-08-30 04:31:26,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1852 transitions. [2023-08-30 04:31:26,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1852 transitions. [2023-08-30 04:31:26,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:26,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1852 transitions. [2023-08-30 04:31:26,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 370.4) internal successors, (1852), 5 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:26,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:26,954 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:26,954 INFO L175 Difference]: Start difference. First operand has 110 places, 98 transitions, 352 flow. Second operand 5 states and 1852 transitions. [2023-08-30 04:31:26,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 193 transitions, 981 flow [2023-08-30 04:31:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 193 transitions, 973 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:31:26,959 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 362 flow [2023-08-30 04:31:26,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2023-08-30 04:31:26,960 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -64 predicate places. [2023-08-30 04:31:26,960 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 362 flow [2023-08-30 04:31:26,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:26,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:26,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:26,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 04:31:26,961 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:26,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1049614802, now seen corresponding path program 1 times [2023-08-30 04:31:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:26,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141801854] [2023-08-30 04:31:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:27,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:27,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141801854] [2023-08-30 04:31:27,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141801854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:27,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:27,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:31:27,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500946394] [2023-08-30 04:31:27,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:27,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:31:27,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:27,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:31:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:31:27,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 731 [2023-08-30 04:31:27,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:27,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:27,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 731 [2023-08-30 04:31:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:28,632 INFO L130 PetriNetUnfolder]: 7548/14942 cut-off events. [2023-08-30 04:31:28,632 INFO L131 PetriNetUnfolder]: For 19333/19335 co-relation queries the response was YES. [2023-08-30 04:31:28,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37665 conditions, 14942 events. 7548/14942 cut-off events. For 19333/19335 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 129534 event pairs, 2553 based on Foata normal form. 2/12413 useless extension candidates. Maximal degree in co-relation 37652. Up to 10608 conditions per place. [2023-08-30 04:31:28,719 INFO L137 encePairwiseOnDemand]: 726/731 looper letters, 153 selfloop transitions, 9 changer transitions 0/192 dead transitions. [2023-08-30 04:31:28,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 192 transitions, 989 flow [2023-08-30 04:31:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:31:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:31:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1887 transitions. [2023-08-30 04:31:28,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162790697674419 [2023-08-30 04:31:28,722 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1887 transitions. [2023-08-30 04:31:28,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1887 transitions. [2023-08-30 04:31:28,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:28,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1887 transitions. [2023-08-30 04:31:28,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 377.4) internal successors, (1887), 5 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:28,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:28,728 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 731.0) internal successors, (4386), 6 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:28,728 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 362 flow. Second operand 5 states and 1887 transitions. [2023-08-30 04:31:28,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 192 transitions, 989 flow [2023-08-30 04:31:28,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 192 transitions, 974 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:31:28,737 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 363 flow [2023-08-30 04:31:28,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2023-08-30 04:31:28,738 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -64 predicate places. [2023-08-30 04:31:28,738 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 363 flow [2023-08-30 04:31:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:28,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:28,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 04:31:28,739 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:28,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1506089669, now seen corresponding path program 1 times [2023-08-30 04:31:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:28,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004110987] [2023-08-30 04:31:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:31:28,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:28,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004110987] [2023-08-30 04:31:28,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004110987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:28,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:28,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:31:28,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245131178] [2023-08-30 04:31:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:28,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:31:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:31:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:31:29,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 731 [2023-08-30 04:31:29,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 363 flow. Second operand has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:29,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:29,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 731 [2023-08-30 04:31:29,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:30,149 INFO L130 PetriNetUnfolder]: 7555/14982 cut-off events. [2023-08-30 04:31:30,149 INFO L131 PetriNetUnfolder]: For 19720/19722 co-relation queries the response was YES. [2023-08-30 04:31:30,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38102 conditions, 14982 events. 7555/14982 cut-off events. For 19720/19722 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 130276 event pairs, 1681 based on Foata normal form. 0/12366 useless extension candidates. Maximal degree in co-relation 38089. Up to 11450 conditions per place. [2023-08-30 04:31:30,234 INFO L137 encePairwiseOnDemand]: 728/731 looper letters, 104 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2023-08-30 04:31:30,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 769 flow [2023-08-30 04:31:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:31:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:31:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1507 transitions. [2023-08-30 04:31:30,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153898768809849 [2023-08-30 04:31:30,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1507 transitions. [2023-08-30 04:31:30,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1507 transitions. [2023-08-30 04:31:30,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:30,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1507 transitions. [2023-08-30 04:31:30,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 376.75) internal successors, (1507), 4 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:30,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 731.0) internal successors, (3655), 5 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:30,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 731.0) internal successors, (3655), 5 states have internal predecessors, (3655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:30,241 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 363 flow. Second operand 4 states and 1507 transitions. [2023-08-30 04:31:30,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 769 flow [2023-08-30 04:31:30,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 140 transitions, 742 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:31:30,247 INFO L231 Difference]: Finished difference. Result has 111 places, 95 transitions, 360 flow [2023-08-30 04:31:30,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=111, PETRI_TRANSITIONS=95} [2023-08-30 04:31:30,247 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -65 predicate places. [2023-08-30 04:31:30,247 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 95 transitions, 360 flow [2023-08-30 04:31:30,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:30,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:30,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:30,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 04:31:30,248 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:30,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1506089668, now seen corresponding path program 1 times [2023-08-30 04:31:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:30,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755927858] [2023-08-30 04:31:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:30,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 04:31:30,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:30,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755927858] [2023-08-30 04:31:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755927858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:31:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507907965] [2023-08-30 04:31:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:31:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:31:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:31:30,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 731 [2023-08-30 04:31:30,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 95 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:30,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:30,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 731 [2023-08-30 04:31:30,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:31,380 INFO L130 PetriNetUnfolder]: 7445/15099 cut-off events. [2023-08-30 04:31:31,380 INFO L131 PetriNetUnfolder]: For 18389/18389 co-relation queries the response was YES. [2023-08-30 04:31:31,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38214 conditions, 15099 events. 7445/15099 cut-off events. For 18389/18389 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 135600 event pairs, 243 based on Foata normal form. 0/12186 useless extension candidates. Maximal degree in co-relation 38201. Up to 11450 conditions per place. [2023-08-30 04:31:31,467 INFO L137 encePairwiseOnDemand]: 729/731 looper letters, 90 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2023-08-30 04:31:31,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 119 transitions, 646 flow [2023-08-30 04:31:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:31:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:31:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1130 transitions. [2023-08-30 04:31:31,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152758777929777 [2023-08-30 04:31:31,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1130 transitions. [2023-08-30 04:31:31,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1130 transitions. [2023-08-30 04:31:31,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:31,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1130 transitions. [2023-08-30 04:31:31,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.6666666666667) internal successors, (1130), 3 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:31,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:31,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:31,473 INFO L175 Difference]: Start difference. First operand has 111 places, 95 transitions, 360 flow. Second operand 3 states and 1130 transitions. [2023-08-30 04:31:31,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 119 transitions, 646 flow [2023-08-30 04:31:31,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 119 transitions, 633 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:31:31,479 INFO L231 Difference]: Finished difference. Result has 110 places, 94 transitions, 347 flow [2023-08-30 04:31:31,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=110, PETRI_TRANSITIONS=94} [2023-08-30 04:31:31,479 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -66 predicate places. [2023-08-30 04:31:31,479 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 94 transitions, 347 flow [2023-08-30 04:31:31,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:31,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:31,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 04:31:31,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:31,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1821668993, now seen corresponding path program 1 times [2023-08-30 04:31:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942428090] [2023-08-30 04:31:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:31,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:31,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942428090] [2023-08-30 04:31:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942428090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:31,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:31:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54559411] [2023-08-30 04:31:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:31,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:31:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:31:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:31:31,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 731 [2023-08-30 04:31:31,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 94 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:31,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:31,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 731 [2023-08-30 04:31:31,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:32,813 INFO L130 PetriNetUnfolder]: 7982/15507 cut-off events. [2023-08-30 04:31:32,813 INFO L131 PetriNetUnfolder]: For 18907/18907 co-relation queries the response was YES. [2023-08-30 04:31:32,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39887 conditions, 15507 events. 7982/15507 cut-off events. For 18907/18907 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 132570 event pairs, 3148 based on Foata normal form. 0/13117 useless extension candidates. Maximal degree in co-relation 39874. Up to 10960 conditions per place. [2023-08-30 04:31:32,918 INFO L137 encePairwiseOnDemand]: 729/731 looper letters, 99 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2023-08-30 04:31:32,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 127 transitions, 671 flow [2023-08-30 04:31:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:31:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:31:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1139 transitions. [2023-08-30 04:31:32,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2023-08-30 04:31:32,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1139 transitions. [2023-08-30 04:31:32,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1139 transitions. [2023-08-30 04:31:32,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:32,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1139 transitions. [2023-08-30 04:31:32,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 379.6666666666667) internal successors, (1139), 3 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:32,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:32,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:32,924 INFO L175 Difference]: Start difference. First operand has 110 places, 94 transitions, 347 flow. Second operand 3 states and 1139 transitions. [2023-08-30 04:31:32,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 127 transitions, 671 flow [2023-08-30 04:31:32,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 127 transitions, 669 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:31:32,932 INFO L231 Difference]: Finished difference. Result has 110 places, 93 transitions, 348 flow [2023-08-30 04:31:32,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=110, PETRI_TRANSITIONS=93} [2023-08-30 04:31:32,932 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -66 predicate places. [2023-08-30 04:31:32,933 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 93 transitions, 348 flow [2023-08-30 04:31:32,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:32,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:32,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 04:31:32,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:32,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1821668992, now seen corresponding path program 1 times [2023-08-30 04:31:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:32,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25258997] [2023-08-30 04:31:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:32,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:32,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25258997] [2023-08-30 04:31:32,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25258997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:32,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:31:32,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434390934] [2023-08-30 04:31:32,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:32,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:31:32,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:32,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:31:32,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:31:33,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 731 [2023-08-30 04:31:33,097 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 93 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:33,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:33,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 731 [2023-08-30 04:31:33,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:31:34,525 INFO L130 PetriNetUnfolder]: 10962/21111 cut-off events. [2023-08-30 04:31:34,525 INFO L131 PetriNetUnfolder]: For 25610/25610 co-relation queries the response was YES. [2023-08-30 04:31:34,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53924 conditions, 21111 events. 10962/21111 cut-off events. For 25610/25610 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 190854 event pairs, 1791 based on Foata normal form. 0/17790 useless extension candidates. Maximal degree in co-relation 53911. Up to 10344 conditions per place. [2023-08-30 04:31:34,659 INFO L137 encePairwiseOnDemand]: 727/731 looper letters, 112 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2023-08-30 04:31:34,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 142 transitions, 735 flow [2023-08-30 04:31:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:31:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:31:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1143 transitions. [2023-08-30 04:31:34,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521203830369357 [2023-08-30 04:31:34,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1143 transitions. [2023-08-30 04:31:34,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1143 transitions. [2023-08-30 04:31:34,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:31:34,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1143 transitions. [2023-08-30 04:31:34,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:34,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:34,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 731.0) internal successors, (2924), 4 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:34,665 INFO L175 Difference]: Start difference. First operand has 110 places, 93 transitions, 348 flow. Second operand 3 states and 1143 transitions. [2023-08-30 04:31:34,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 142 transitions, 735 flow [2023-08-30 04:31:34,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 142 transitions, 733 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:31:34,674 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 398 flow [2023-08-30 04:31:34,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=731, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2023-08-30 04:31:34,674 INFO L281 CegarLoopForPetriNet]: 176 programPoint places, -63 predicate places. [2023-08-30 04:31:34,674 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 398 flow [2023-08-30 04:31:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:34,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:34,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:31:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 04:31:34,675 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 04:31:34,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -572798622, now seen corresponding path program 1 times [2023-08-30 04:31:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601143472] [2023-08-30 04:31:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:31:34,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:31:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:31:34,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:31:34,714 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (103 of 104 remaining) [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 104 remaining) [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 104 remaining) [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 104 remaining) [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 104 remaining) [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 104 remaining) [2023-08-30 04:31:34,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 104 remaining) [2023-08-30 04:31:34,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 104 remaining) [2023-08-30 04:31:34,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK (74 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 104 remaining) [2023-08-30 04:31:34,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK (63 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 104 remaining) [2023-08-30 04:31:34,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 104 remaining) [2023-08-30 04:31:34,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 104 remaining) [2023-08-30 04:31:34,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 104 remaining) [2023-08-30 04:31:34,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (42 of 104 remaining) [2023-08-30 04:31:34,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 104 remaining) [2023-08-30 04:31:34,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 104 remaining) [2023-08-30 04:31:34,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 104 remaining) [2023-08-30 04:31:34,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 104 remaining) [2023-08-30 04:31:34,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 104 remaining) [2023-08-30 04:31:34,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 104 remaining) [2023-08-30 04:31:34,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 104 remaining) [2023-08-30 04:31:34,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 104 remaining) [2023-08-30 04:31:34,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 104 remaining) [2023-08-30 04:31:34,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 104 remaining) [2023-08-30 04:31:34,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 104 remaining) [2023-08-30 04:31:34,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 104 remaining) [2023-08-30 04:31:34,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 104 remaining) [2023-08-30 04:31:34,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 104 remaining) [2023-08-30 04:31:34,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (21 of 104 remaining) [2023-08-30 04:31:34,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 104 remaining) [2023-08-30 04:31:34,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 104 remaining) [2023-08-30 04:31:34,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 104 remaining) [2023-08-30 04:31:34,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 104 remaining) [2023-08-30 04:31:34,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 104 remaining) [2023-08-30 04:31:34,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 104 remaining) [2023-08-30 04:31:34,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 104 remaining) [2023-08-30 04:31:34,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 104 remaining) [2023-08-30 04:31:34,729 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 104 remaining) [2023-08-30 04:31:34,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 04:31:34,729 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:31:34,730 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:31:34,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:31:34,795 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:31:34,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 454 places, 502 transitions, 1034 flow [2023-08-30 04:31:34,969 INFO L130 PetriNetUnfolder]: 112/1009 cut-off events. [2023-08-30 04:31:34,969 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:31:34,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 1009 events. 112/1009 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5387 event pairs, 1 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 711. Up to 16 conditions per place. [2023-08-30 04:31:34,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 454 places, 502 transitions, 1034 flow [2023-08-30 04:31:34,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 454 places, 502 transitions, 1034 flow [2023-08-30 04:31:34,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:31:34,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 454 places, 502 transitions, 1034 flow [2023-08-30 04:31:34,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 454 places, 502 transitions, 1034 flow [2023-08-30 04:31:34,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 454 places, 502 transitions, 1034 flow [2023-08-30 04:31:35,124 INFO L130 PetriNetUnfolder]: 112/1009 cut-off events. [2023-08-30 04:31:35,124 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:31:35,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 1009 events. 112/1009 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5387 event pairs, 1 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 711. Up to 16 conditions per place. [2023-08-30 04:31:35,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 145236 [2023-08-30 04:31:50,702 INFO L134 LiptonReduction]: Checked pairs total: 555623 [2023-08-30 04:31:50,702 INFO L136 LiptonReduction]: Total number of compositions: 356 [2023-08-30 04:31:50,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:31:50,704 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;@871617e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:31:50,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 125 error locations. [2023-08-30 04:31:50,704 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 04:31:50,704 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:31:50,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:31:50,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 04:31:50,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 122 more)] === [2023-08-30 04:31:50,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:31:50,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2879, now seen corresponding path program 1 times [2023-08-30 04:31:50,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:31:50,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350974533] [2023-08-30 04:31:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:31:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:31:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:31:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:31:50,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:31:50,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350974533] [2023-08-30 04:31:50,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350974533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:31:50,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:31:50,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 04:31:50,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330120382] [2023-08-30 04:31:50,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:31:50,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 04:31:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:31:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 04:31:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 04:31:50,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 445 out of 858 [2023-08-30 04:31:50,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 267 transitions, 564 flow. Second operand has 2 states, 2 states have (on average 445.5) internal successors, (891), 2 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:31:50,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:31:50,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 445 of 858 [2023-08-30 04:31:50,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand