./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/stack-2.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/pthread/stack-2.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --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 02:19:30,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:19:30,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:19:30,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:19:30,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:19:30,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:19:30,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:19:30,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:19:30,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:19:30,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:19:30,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:19:30,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:19:30,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:19:30,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:19:30,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:19:30,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:19:30,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:19:30,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:19:30,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:19:30,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:19:30,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:19:30,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:19:30,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:19:30,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:19:30,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:19:30,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:19:30,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:19:30,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:19:30,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:19:30,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:19:30,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:19:30,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:19:30,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:19:30,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:19:30,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:19:30,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:19:30,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:19:30,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:19:30,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:19:30,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:19:30,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:19:30,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:19:30,663 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:19:30,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:19:30,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:19:30,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:19:30,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:19:30,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:19:30,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:19:30,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:19:30,667 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:19:30,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:19:30,667 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:19:30,667 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:19:30,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:19:30,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:19:30,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:19:30,668 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:19:30,668 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:19:30,669 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:19:30,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:19:30,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:19:30,669 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:19:30,669 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:19:30,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:19:30,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:19:30,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:19:30,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:19:30,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:19:30,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:19:30,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:19:30,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:19:30,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:19:30,671 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:19:30,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:19:30,672 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:19:30,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:19:30,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:19:30,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:19:31,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:19:31,001 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:19:31,002 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:19:31,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-30 02:19:32,177 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:19:32,451 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:19:32,452 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-30 02:19:32,475 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af745e6c6/f7d67bb5c7724978a165d3d9f76eb3a3/FLAG28543f4c0 [2023-08-30 02:19:32,500 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af745e6c6/f7d67bb5c7724978a165d3d9f76eb3a3 [2023-08-30 02:19:32,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:19:32,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:19:32,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:19:32,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:19:32,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:19:32,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:19:32" (1/1) ... [2023-08-30 02:19:32,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fca889e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:32, skipping insertion in model container [2023-08-30 02:19:32,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:19:32" (1/1) ... [2023-08-30 02:19:32,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:19:32,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:19:33,023 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-08-30 02:19:33,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:19:33,071 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:19:33,128 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-08-30 02:19:33,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:19:33,204 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:19:33,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33 WrapperNode [2023-08-30 02:19:33,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:19:33,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:19:33,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:19:33,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:19:33,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,284 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 160 [2023-08-30 02:19:33,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:19:33,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:19:33,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:19:33,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:19:33,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,337 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:19:33,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:19:33,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:19:33,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:19:33,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (1/1) ... [2023-08-30 02:19:33,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:19:33,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:33,402 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 02:19:33,427 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 02:19:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:19:33,440 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:19:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:19:33,440 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:19:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:19:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:19:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:19:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:19:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:19:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:19:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:19:33,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:19:33,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:19:33,443 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 02:19:33,636 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:19:33,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:19:33,971 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:19:33,979 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:19:33,983 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:19:33,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:33 BoogieIcfgContainer [2023-08-30 02:19:33,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:19:33,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:19:33,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:19:33,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:19:33,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:19:32" (1/3) ... [2023-08-30 02:19:33,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32554f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:19:33, skipping insertion in model container [2023-08-30 02:19:33,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:19:33" (2/3) ... [2023-08-30 02:19:33,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32554f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:19:33, skipping insertion in model container [2023-08-30 02:19:33,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:33" (3/3) ... [2023-08-30 02:19:33,997 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-30 02:19:34,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:19:34,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 02:19:34,014 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:19:34,137 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:19:34,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 178 transitions, 372 flow [2023-08-30 02:19:34,268 INFO L130 PetriNetUnfolder]: 10/176 cut-off events. [2023-08-30 02:19:34,269 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:19:34,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 176 events. 10/176 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-30 02:19:34,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 178 transitions, 372 flow [2023-08-30 02:19:34,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 172 transitions, 356 flow [2023-08-30 02:19:34,292 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:19:34,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 172 transitions, 356 flow [2023-08-30 02:19:34,313 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 172 transitions, 356 flow [2023-08-30 02:19:34,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 172 transitions, 356 flow [2023-08-30 02:19:34,375 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-30 02:19:34,375 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:19:34,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-08-30 02:19:34,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 8718 [2023-08-30 02:19:39,223 INFO L134 LiptonReduction]: Checked pairs total: 13531 [2023-08-30 02:19:39,223 INFO L136 LiptonReduction]: Total number of compositions: 173 [2023-08-30 02:19:39,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:19:39,243 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;@59959c46, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:19:39,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 02:19:39,246 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 02:19:39,246 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:19:39,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:39,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:19:39,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:39,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 725, now seen corresponding path program 1 times [2023-08-30 02:19:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42405958] [2023-08-30 02:19:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:39,342 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 02:19:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42405958] [2023-08-30 02:19:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42405958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:39,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:19:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680143589] [2023-08-30 02:19:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:39,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:19:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:19:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:19:39,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 351 [2023-08-30 02:19:39,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 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 02:19:39,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:39,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 351 [2023-08-30 02:19:39,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:39,673 INFO L130 PetriNetUnfolder]: 1445/2244 cut-off events. [2023-08-30 02:19:39,673 INFO L131 PetriNetUnfolder]: For 51/51 co-relation queries the response was YES. [2023-08-30 02:19:39,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4513 conditions, 2244 events. 1445/2244 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10421 event pairs, 1169 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 4244. Up to 2225 conditions per place. [2023-08-30 02:19:39,688 INFO L137 encePairwiseOnDemand]: 349/351 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-30 02:19:39,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-30 02:19:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:19:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:19:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 380 transitions. [2023-08-30 02:19:39,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413105413105413 [2023-08-30 02:19:39,703 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 380 transitions. [2023-08-30 02:19:39,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 380 transitions. [2023-08-30 02:19:39,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:39,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 380 transitions. [2023-08-30 02:19:39,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 190.0) internal successors, (380), 2 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 02:19:39,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 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 02:19:39,716 INFO L81 ComplementDD]: Finished complementDD. Result 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 02:19:39,717 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 380 transitions. [2023-08-30 02:19:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-30 02:19:39,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:19:39,723 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-30 02:19:39,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 02:19:39,728 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:19:39,729 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-30 02:19:39,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 167.5) internal successors, (335), 2 states have internal predecessors, (335), 0 states have call successors, (0), 0 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 02:19:39,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:39,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:19:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:19:39,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:39,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash 711496, now seen corresponding path program 1 times [2023-08-30 02:19:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:39,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373377930] [2023-08-30 02:19:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:39,898 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 02:19:39,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:39,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373377930] [2023-08-30 02:19:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373377930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:39,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:39,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144163237] [2023-08-30 02:19:39,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:39,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:39,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 351 [2023-08-30 02:19:39,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 02:19:39,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:39,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 351 [2023-08-30 02:19:39,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:40,162 INFO L130 PetriNetUnfolder]: 1416/2188 cut-off events. [2023-08-30 02:19:40,164 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:19:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4373 conditions, 2188 events. 1416/2188 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10060 event pairs, 1145 based on Foata normal form. 0/1217 useless extension candidates. Maximal degree in co-relation 4370. Up to 2168 conditions per place. [2023-08-30 02:19:40,174 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 02:19:40,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-30 02:19:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 02:19:40,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919278252611586 [2023-08-30 02:19:40,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 02:19:40,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 02:19:40,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:40,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 02:19:40,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 02:19:40,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:40,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:40,189 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-30 02:19:40,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-30 02:19:40,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:19:40,192 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-30 02:19:40,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 02:19:40,193 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:19:40,193 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-30 02:19:40,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 02:19:40,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:40,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:19:40,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:19:40,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:40,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 711497, now seen corresponding path program 1 times [2023-08-30 02:19:40,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:40,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254643449] [2023-08-30 02:19:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:40,344 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 02:19:40,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:40,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254643449] [2023-08-30 02:19:40,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254643449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:40,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:40,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60065773] [2023-08-30 02:19:40,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:40,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-30 02:19:40,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 02:19:40,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:40,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-30 02:19:40,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:40,552 INFO L130 PetriNetUnfolder]: 1387/2132 cut-off events. [2023-08-30 02:19:40,553 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:19:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 2132 events. 1387/2132 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9708 event pairs, 1121 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 4261. Up to 2113 conditions per place. [2023-08-30 02:19:40,566 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 02:19:40,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-30 02:19:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-30 02:19:40,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014245014245015 [2023-08-30 02:19:40,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-30 02:19:40,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-30 02:19:40,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:40,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-30 02:19:40,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 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 02:19:40,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:40,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:40,576 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 528 transitions. [2023-08-30 02:19:40,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-30 02:19:40,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:40,577 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-30 02:19:40,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-30 02:19:40,578 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:19:40,579 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-30 02:19:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 02:19:40,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:40,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:19:40,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:19:40,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:40,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 683763408, now seen corresponding path program 1 times [2023-08-30 02:19:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:40,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194133343] [2023-08-30 02:19:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:40,658 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 02:19:40,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:40,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194133343] [2023-08-30 02:19:40,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194133343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:40,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:40,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:19:40,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109319711] [2023-08-30 02:19:40,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:40,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:40,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-30 02:19:40,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 02:19:40,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:40,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-30 02:19:40,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:40,838 INFO L130 PetriNetUnfolder]: 1013/1586 cut-off events. [2023-08-30 02:19:40,838 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:19:40,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1586 events. 1013/1586 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6956 event pairs, 811 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 3173. Up to 1571 conditions per place. [2023-08-30 02:19:40,845 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 02:19:40,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-30 02:19:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-30 02:19:40,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49952516619183285 [2023-08-30 02:19:40,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-30 02:19:40,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-30 02:19:40,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:40,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-30 02:19:40,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 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 02:19:40,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:40,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:40,861 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 526 transitions. [2023-08-30 02:19:40,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-30 02:19:40,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:40,862 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-30 02:19:40,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-30 02:19:40,864 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-30 02:19:40,864 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-30 02:19:40,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 02:19:40,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:40,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:19:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:19:40,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:40,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 683763409, now seen corresponding path program 1 times [2023-08-30 02:19:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:40,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359984649] [2023-08-30 02:19:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:40,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:40,972 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 02:19:40,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359984649] [2023-08-30 02:19:40,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359984649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:40,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:40,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:40,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213420699] [2023-08-30 02:19:40,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:40,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:19:40,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:40,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:19:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:19:41,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 351 [2023-08-30 02:19:41,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 02:19:41,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:41,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 351 [2023-08-30 02:19:41,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:41,138 INFO L130 PetriNetUnfolder]: 639/1040 cut-off events. [2023-08-30 02:19:41,139 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 02:19:41,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 1040 events. 639/1040 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4363 event pairs, 501 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 2085. Up to 1029 conditions per place. [2023-08-30 02:19:41,143 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-30 02:19:41,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-30 02:19:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 02:19:41,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-30 02:19:41,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 02:19:41,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 02:19:41,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:41,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 02:19:41,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 02:19:41,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:41,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:41,150 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 501 transitions. [2023-08-30 02:19:41,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-30 02:19:41,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:41,152 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-30 02:19:41,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-30 02:19:41,154 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-30 02:19:41,155 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-30 02:19:41,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 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 02:19:41,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:41,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:19:41,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:41,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash -279076636, now seen corresponding path program 1 times [2023-08-30 02:19:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:41,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248571906] [2023-08-30 02:19:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:41,205 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 02:19:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248571906] [2023-08-30 02:19:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248571906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:41,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:41,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701471980] [2023-08-30 02:19:41,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:41,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:41,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:41,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-30 02:19:41,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 02:19:41,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:41,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-30 02:19:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:41,395 INFO L130 PetriNetUnfolder]: 1075/1756 cut-off events. [2023-08-30 02:19:41,396 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 02:19:41,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1756 events. 1075/1756 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7943 event pairs, 312 based on Foata normal form. 0/1258 useless extension candidates. Maximal degree in co-relation 3516. Up to 1042 conditions per place. [2023-08-30 02:19:41,403 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-30 02:19:41,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-08-30 02:19:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-08-30 02:19:41,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2023-08-30 02:19:41,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-08-30 02:19:41,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-08-30 02:19:41,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:41,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-08-30 02:19:41,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 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 02:19:41,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:41,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:41,410 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 559 transitions. [2023-08-30 02:19:41,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-08-30 02:19:41,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:41,412 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-30 02:19:41,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-30 02:19:41,413 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:19:41,413 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-30 02:19:41,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 02:19:41,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:41,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:41,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:19:41,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:41,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:41,415 INFO L85 PathProgramCache]: Analyzing trace with hash -279078099, now seen corresponding path program 1 times [2023-08-30 02:19:41,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:41,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811475560] [2023-08-30 02:19:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:41,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:41,643 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 02:19:41,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811475560] [2023-08-30 02:19:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811475560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:41,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:41,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251151286] [2023-08-30 02:19:41,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:41,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:19:41,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:41,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:19:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:19:41,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 351 [2023-08-30 02:19:41,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 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 02:19:41,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:41,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 351 [2023-08-30 02:19:41,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:42,164 INFO L130 PetriNetUnfolder]: 1340/2209 cut-off events. [2023-08-30 02:19:42,164 INFO L131 PetriNetUnfolder]: For 345/345 co-relation queries the response was YES. [2023-08-30 02:19:42,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 2209 events. 1340/2209 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10364 event pairs, 277 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 4742. Up to 1690 conditions per place. [2023-08-30 02:19:42,175 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-08-30 02:19:42,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 449 flow [2023-08-30 02:19:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:19:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:19:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 896 transitions. [2023-08-30 02:19:42,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105413105413106 [2023-08-30 02:19:42,178 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 896 transitions. [2023-08-30 02:19:42,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 896 transitions. [2023-08-30 02:19:42,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:42,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 896 transitions. [2023-08-30 02:19:42,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 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 02:19:42,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 02:19:42,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 02:19:42,185 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 896 transitions. [2023-08-30 02:19:42,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 449 flow [2023-08-30 02:19:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:42,190 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-30 02:19:42,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-30 02:19:42,192 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-30 02:19:42,192 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-30 02:19:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 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 02:19:42,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:42,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:19:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:19:42,194 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:42,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash -279078098, now seen corresponding path program 1 times [2023-08-30 02:19:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:42,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124000570] [2023-08-30 02:19:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:42,332 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 02:19:42,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:42,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124000570] [2023-08-30 02:19:42,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124000570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:42,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:42,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:42,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925496991] [2023-08-30 02:19:42,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:19:42,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:19:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:19:42,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 351 [2023-08-30 02:19:42,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 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 02:19:42,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:42,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 351 [2023-08-30 02:19:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:42,753 INFO L130 PetriNetUnfolder]: 1527/2496 cut-off events. [2023-08-30 02:19:42,753 INFO L131 PetriNetUnfolder]: For 532/532 co-relation queries the response was YES. [2023-08-30 02:19:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5712 conditions, 2496 events. 1527/2496 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12245 event pairs, 499 based on Foata normal form. 0/2144 useless extension candidates. Maximal degree in co-relation 5704. Up to 1668 conditions per place. [2023-08-30 02:19:42,765 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 88 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-30 02:19:42,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 477 flow [2023-08-30 02:19:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:19:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:19:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 879 transitions. [2023-08-30 02:19:42,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008547008547009 [2023-08-30 02:19:42,769 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 879 transitions. [2023-08-30 02:19:42,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 879 transitions. [2023-08-30 02:19:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:42,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 879 transitions. [2023-08-30 02:19:42,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 0 states have call successors, (0), 0 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 02:19:42,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 02:19:42,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 02:19:42,775 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 879 transitions. [2023-08-30 02:19:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 477 flow [2023-08-30 02:19:42,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:19:42,778 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 200 flow [2023-08-30 02:19:42,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 02:19:42,779 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 02:19:42,779 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 200 flow [2023-08-30 02:19:42,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 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 02:19:42,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:42,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:19:42,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:42,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1980734071, now seen corresponding path program 1 times [2023-08-30 02:19:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157536695] [2023-08-30 02:19:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:42,823 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 02:19:42,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157536695] [2023-08-30 02:19:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157536695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:42,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:42,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595470377] [2023-08-30 02:19:42,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:42,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 351 [2023-08-30 02:19:42,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 02:19:42,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:42,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 351 [2023-08-30 02:19:42,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:43,020 INFO L130 PetriNetUnfolder]: 1038/1713 cut-off events. [2023-08-30 02:19:43,021 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-08-30 02:19:43,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 1713 events. 1038/1713 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7487 event pairs, 470 based on Foata normal form. 0/1455 useless extension candidates. Maximal degree in co-relation 4037. Up to 1417 conditions per place. [2023-08-30 02:19:43,039 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 58 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-30 02:19:43,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 312 flow [2023-08-30 02:19:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-30 02:19:43,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223171889838556 [2023-08-30 02:19:43,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-30 02:19:43,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-30 02:19:43,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:43,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-30 02:19:43,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 02:19:43,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:43,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:43,046 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 200 flow. Second operand 3 states and 550 transitions. [2023-08-30 02:19:43,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 312 flow [2023-08-30 02:19:43,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 292 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 02:19:43,051 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 149 flow [2023-08-30 02:19:43,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-30 02:19:43,052 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-30 02:19:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 149 flow [2023-08-30 02:19:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 02:19:43,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:43,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:19:43,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:43,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2112403101, now seen corresponding path program 1 times [2023-08-30 02:19:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:43,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748208441] [2023-08-30 02:19:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:43,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:43,100 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 02:19:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748208441] [2023-08-30 02:19:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748208441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:43,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:43,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:19:43,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978403292] [2023-08-30 02:19:43,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:43,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:43,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:43,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:43,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-30 02:19:43,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 02:19:43,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:43,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-30 02:19:43,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:43,319 INFO L130 PetriNetUnfolder]: 1100/1809 cut-off events. [2023-08-30 02:19:43,320 INFO L131 PetriNetUnfolder]: For 440/440 co-relation queries the response was YES. [2023-08-30 02:19:43,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 1809 events. 1100/1809 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8048 event pairs, 782 based on Foata normal form. 60/1705 useless extension candidates. Maximal degree in co-relation 4237. Up to 1632 conditions per place. [2023-08-30 02:19:43,327 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 62 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-30 02:19:43,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 68 transitions, 340 flow [2023-08-30 02:19:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-30 02:19:43,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194681861348528 [2023-08-30 02:19:43,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-30 02:19:43,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-30 02:19:43,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:43,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-30 02:19:43,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 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 02:19:43,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:43,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:43,334 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 149 flow. Second operand 3 states and 547 transitions. [2023-08-30 02:19:43,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 68 transitions, 340 flow [2023-08-30 02:19:43,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:43,338 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 170 flow [2023-08-30 02:19:43,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-30 02:19:43,339 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-30 02:19:43,339 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 170 flow [2023-08-30 02:19:43,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 02:19:43,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:43,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:43,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:19:43,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:43,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash -473821575, now seen corresponding path program 1 times [2023-08-30 02:19:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:43,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535410421] [2023-08-30 02:19:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:43,369 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 02:19:43,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:43,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535410421] [2023-08-30 02:19:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535410421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:43,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222928065] [2023-08-30 02:19:43,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:43,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:43,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-30 02:19:43,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 02:19:43,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:43,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-30 02:19:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:43,565 INFO L130 PetriNetUnfolder]: 1152/1917 cut-off events. [2023-08-30 02:19:43,565 INFO L131 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2023-08-30 02:19:43,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1917 events. 1152/1917 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9386 event pairs, 495 based on Foata normal form. 12/1759 useless extension candidates. Maximal degree in co-relation 4697. Up to 1599 conditions per place. [2023-08-30 02:19:43,575 INFO L137 encePairwiseOnDemand]: 348/351 looper letters, 67 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-30 02:19:43,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 364 flow [2023-08-30 02:19:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2023-08-30 02:19:43,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251661918328585 [2023-08-30 02:19:43,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2023-08-30 02:19:43,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2023-08-30 02:19:43,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:43,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2023-08-30 02:19:43,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 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 02:19:43,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:43,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:43,581 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 170 flow. Second operand 3 states and 553 transitions. [2023-08-30 02:19:43,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 364 flow [2023-08-30 02:19:43,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:43,586 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 172 flow [2023-08-30 02:19:43,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-30 02:19:43,587 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 02:19:43,587 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 172 flow [2023-08-30 02:19:43,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 02:19:43,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:43,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:19:43,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:43,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1409017203, now seen corresponding path program 1 times [2023-08-30 02:19:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:43,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735694539] [2023-08-30 02:19:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735694539] [2023-08-30 02:19:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735694539] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:19:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917550436] [2023-08-30 02:19:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:19:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:43,653 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 02:19:43,680 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 02:19:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:19:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:19:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:43,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:19:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:43,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917550436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:19:43,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:19:43,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-30 02:19:43,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514184473] [2023-08-30 02:19:43,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:19:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 02:19:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 02:19:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 02:19:43,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 351 [2023-08-30 02:19:43,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 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 02:19:43,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:43,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 351 [2023-08-30 02:19:43,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:44,609 INFO L130 PetriNetUnfolder]: 2435/3960 cut-off events. [2023-08-30 02:19:44,609 INFO L131 PetriNetUnfolder]: For 1463/1463 co-relation queries the response was YES. [2023-08-30 02:19:44,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 3960 events. 2435/3960 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19784 event pairs, 378 based on Foata normal form. 60/3634 useless extension candidates. Maximal degree in co-relation 9931. Up to 1190 conditions per place. [2023-08-30 02:19:44,647 INFO L137 encePairwiseOnDemand]: 345/351 looper letters, 202 selfloop transitions, 23 changer transitions 0/225 dead transitions. [2023-08-30 02:19:44,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 225 transitions, 1115 flow [2023-08-30 02:19:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:19:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:19:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1818 transitions. [2023-08-30 02:19:44,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517948717948718 [2023-08-30 02:19:44,652 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1818 transitions. [2023-08-30 02:19:44,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1818 transitions. [2023-08-30 02:19:44,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:44,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1818 transitions. [2023-08-30 02:19:44,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 181.8) internal successors, (1818), 10 states have internal predecessors, (1818), 0 states have call successors, (0), 0 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 02:19:44,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 351.0) internal successors, (3861), 11 states have internal predecessors, (3861), 0 states have call successors, (0), 0 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 02:19:44,695 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 351.0) internal successors, (3861), 11 states have internal predecessors, (3861), 0 states have call successors, (0), 0 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 02:19:44,695 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 172 flow. Second operand 10 states and 1818 transitions. [2023-08-30 02:19:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 225 transitions, 1115 flow [2023-08-30 02:19:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 225 transitions, 1111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:44,703 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 339 flow [2023-08-30 02:19:44,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-08-30 02:19:44,704 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-30 02:19:44,704 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 339 flow [2023-08-30 02:19:44,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.6) internal successors, (1636), 10 states have internal predecessors, (1636), 0 states have call successors, (0), 0 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 02:19:44,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:44,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:44,715 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 02:19:44,911 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,SelfDestructingSolverStorable11 [2023-08-30 02:19:44,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:44,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:44,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1409018666, now seen corresponding path program 1 times [2023-08-30 02:19:44,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:44,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105363351] [2023-08-30 02:19:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:45,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:45,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105363351] [2023-08-30 02:19:45,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105363351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:19:45,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304649545] [2023-08-30 02:19:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:45,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:19:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:19:45,305 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 02:19:45,313 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 02:19:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-30 02:19:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:19:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:19:45,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 02:19:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:45,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:19:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:19:45,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304649545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:19:45,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:19:45,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-30 02:19:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291064186] [2023-08-30 02:19:45,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:19:45,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:19:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:19:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:19:47,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 351 [2023-08-30 02:19:47,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 339 flow. Second operand has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 0 states have call successors, (0), 0 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 02:19:47,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:47,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 351 [2023-08-30 02:19:47,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:49,442 INFO L130 PetriNetUnfolder]: 3743/6076 cut-off events. [2023-08-30 02:19:49,443 INFO L131 PetriNetUnfolder]: For 4774/4774 co-relation queries the response was YES. [2023-08-30 02:19:49,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 6076 events. 3743/6076 cut-off events. For 4774/4774 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 30295 event pairs, 949 based on Foata normal form. 84/5586 useless extension candidates. Maximal degree in co-relation 16608. Up to 3657 conditions per place. [2023-08-30 02:19:49,480 INFO L137 encePairwiseOnDemand]: 343/351 looper letters, 236 selfloop transitions, 27 changer transitions 0/263 dead transitions. [2023-08-30 02:19:49,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 263 transitions, 1483 flow [2023-08-30 02:19:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:19:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:19:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2375 transitions. [2023-08-30 02:19:49,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48331298331298334 [2023-08-30 02:19:49,486 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2375 transitions. [2023-08-30 02:19:49,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2375 transitions. [2023-08-30 02:19:49,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:49,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2375 transitions. [2023-08-30 02:19:49,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 169.64285714285714) internal successors, (2375), 14 states have internal predecessors, (2375), 0 states have call successors, (0), 0 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 02:19:49,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 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 02:19:49,552 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 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 02:19:49,552 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 339 flow. Second operand 14 states and 2375 transitions. [2023-08-30 02:19:49,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 263 transitions, 1483 flow [2023-08-30 02:19:49,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 263 transitions, 1451 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-30 02:19:49,598 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 605 flow [2023-08-30 02:19:49,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=605, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-08-30 02:19:49,599 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2023-08-30 02:19:49,599 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 605 flow [2023-08-30 02:19:49,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.0) internal successors, (3255), 21 states have internal predecessors, (3255), 0 states have call successors, (0), 0 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 02:19:49,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:49,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:49,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 02:19:49,806 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 02:19:49,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:49,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:49,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1918706977, now seen corresponding path program 1 times [2023-08-30 02:19:49,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:49,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273731602] [2023-08-30 02:19:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:49,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:49,888 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 02:19:49,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273731602] [2023-08-30 02:19:49,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273731602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:49,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:49,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490955479] [2023-08-30 02:19:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:49,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:49,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:49,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 351 [2023-08-30 02:19:49,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 605 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 02:19:49,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:49,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 351 [2023-08-30 02:19:49,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:50,131 INFO L130 PetriNetUnfolder]: 852/1615 cut-off events. [2023-08-30 02:19:50,131 INFO L131 PetriNetUnfolder]: For 1937/1937 co-relation queries the response was YES. [2023-08-30 02:19:50,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4548 conditions, 1615 events. 852/1615 cut-off events. For 1937/1937 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7069 event pairs, 117 based on Foata normal form. 94/1633 useless extension candidates. Maximal degree in co-relation 4523. Up to 1249 conditions per place. [2023-08-30 02:19:50,144 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 61 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2023-08-30 02:19:50,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 555 flow [2023-08-30 02:19:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-30 02:19:50,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2023-08-30 02:19:50,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-30 02:19:50,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-30 02:19:50,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:50,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-30 02:19:50,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 02:19:50,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:50,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:50,152 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 605 flow. Second operand 3 states and 531 transitions. [2023-08-30 02:19:50,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 555 flow [2023-08-30 02:19:50,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 529 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-30 02:19:50,159 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 383 flow [2023-08-30 02:19:50,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2023-08-30 02:19:50,160 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2023-08-30 02:19:50,160 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 383 flow [2023-08-30 02:19:50,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 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 02:19:50,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:50,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:50,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:19:50,161 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:50,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash -766914059, now seen corresponding path program 1 times [2023-08-30 02:19:50,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:50,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104697853] [2023-08-30 02:19:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:50,275 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 02:19:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:50,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104697853] [2023-08-30 02:19:50,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104697853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:50,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:50,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:19:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533807853] [2023-08-30 02:19:50,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:50,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:19:50,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:19:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:19:50,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 351 [2023-08-30 02:19:50,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 383 flow. Second operand has 7 states, 7 states have (on average 157.71428571428572) internal successors, (1104), 7 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 02:19:50,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:50,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 351 [2023-08-30 02:19:50,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:50,855 INFO L130 PetriNetUnfolder]: 933/1761 cut-off events. [2023-08-30 02:19:50,855 INFO L131 PetriNetUnfolder]: For 1216/1216 co-relation queries the response was YES. [2023-08-30 02:19:50,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5027 conditions, 1761 events. 933/1761 cut-off events. For 1216/1216 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7702 event pairs, 159 based on Foata normal form. 0/1755 useless extension candidates. Maximal degree in co-relation 5004. Up to 951 conditions per place. [2023-08-30 02:19:50,870 INFO L137 encePairwiseOnDemand]: 343/351 looper letters, 92 selfloop transitions, 9 changer transitions 0/106 dead transitions. [2023-08-30 02:19:50,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 741 flow [2023-08-30 02:19:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 02:19:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 02:19:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1319 transitions. [2023-08-30 02:19:50,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46972934472934474 [2023-08-30 02:19:50,874 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1319 transitions. [2023-08-30 02:19:50,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1319 transitions. [2023-08-30 02:19:50,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:50,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1319 transitions. [2023-08-30 02:19:50,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 164.875) internal successors, (1319), 8 states have internal predecessors, (1319), 0 states have call successors, (0), 0 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 02:19:50,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 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 02:19:50,882 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 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 02:19:50,883 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 383 flow. Second operand 8 states and 1319 transitions. [2023-08-30 02:19:50,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 741 flow [2023-08-30 02:19:50,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:50,890 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 429 flow [2023-08-30 02:19:50,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=429, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-08-30 02:19:50,891 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2023-08-30 02:19:50,891 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 429 flow [2023-08-30 02:19:50,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 157.71428571428572) internal successors, (1104), 7 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 02:19:50,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:50,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:50,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:19:50,892 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:50,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -546386250, now seen corresponding path program 1 times [2023-08-30 02:19:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:50,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831512722] [2023-08-30 02:19:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:51,165 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 02:19:51,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831512722] [2023-08-30 02:19:51,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831512722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:51,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:19:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631699902] [2023-08-30 02:19:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:51,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:19:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:19:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:19:52,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 351 [2023-08-30 02:19:52,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 429 flow. Second operand has 12 states, 12 states have (on average 148.66666666666666) internal successors, (1784), 12 states have internal predecessors, (1784), 0 states have call successors, (0), 0 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 02:19:52,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:52,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 351 [2023-08-30 02:19:52,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:52,775 INFO L130 PetriNetUnfolder]: 1099/2019 cut-off events. [2023-08-30 02:19:52,775 INFO L131 PetriNetUnfolder]: For 1379/1379 co-relation queries the response was YES. [2023-08-30 02:19:52,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5845 conditions, 2019 events. 1099/2019 cut-off events. For 1379/1379 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9026 event pairs, 277 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 5819. Up to 1464 conditions per place. [2023-08-30 02:19:52,786 INFO L137 encePairwiseOnDemand]: 340/351 looper letters, 139 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2023-08-30 02:19:52,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 997 flow [2023-08-30 02:19:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:19:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:19:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1749 transitions. [2023-08-30 02:19:52,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452991452991453 [2023-08-30 02:19:52,791 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1749 transitions. [2023-08-30 02:19:52,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1749 transitions. [2023-08-30 02:19:52,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:52,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1749 transitions. [2023-08-30 02:19:52,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 159.0) internal successors, (1749), 11 states have internal predecessors, (1749), 0 states have call successors, (0), 0 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 02:19:52,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 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 02:19:52,802 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 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 02:19:52,803 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 429 flow. Second operand 11 states and 1749 transitions. [2023-08-30 02:19:52,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 997 flow [2023-08-30 02:19:52,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 152 transitions, 992 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:19:52,810 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 511 flow [2023-08-30 02:19:52,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=511, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-30 02:19:52,811 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2023-08-30 02:19:52,812 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 511 flow [2023-08-30 02:19:52,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 148.66666666666666) internal successors, (1784), 12 states have internal predecessors, (1784), 0 states have call successors, (0), 0 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 02:19:52,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:52,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:52,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:19:52,813 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:52,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1684855074, now seen corresponding path program 1 times [2023-08-30 02:19:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71074085] [2023-08-30 02:19:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:52,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:19:52,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71074085] [2023-08-30 02:19:52,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71074085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:52,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:52,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:19:52,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575913148] [2023-08-30 02:19:52,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:52,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:19:52,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:19:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:19:52,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 351 [2023-08-30 02:19:52,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 511 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 02:19:52,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:52,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 351 [2023-08-30 02:19:52,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:53,151 INFO L130 PetriNetUnfolder]: 1302/2468 cut-off events. [2023-08-30 02:19:53,152 INFO L131 PetriNetUnfolder]: For 2564/2564 co-relation queries the response was YES. [2023-08-30 02:19:53,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7439 conditions, 2468 events. 1302/2468 cut-off events. For 2564/2564 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12525 event pairs, 812 based on Foata normal form. 72/2492 useless extension candidates. Maximal degree in co-relation 7409. Up to 1878 conditions per place. [2023-08-30 02:19:53,170 INFO L137 encePairwiseOnDemand]: 347/351 looper letters, 111 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-08-30 02:19:53,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 1020 flow [2023-08-30 02:19:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:19:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:19:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-30 02:19:53,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261158594491928 [2023-08-30 02:19:53,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-30 02:19:53,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-30 02:19:53,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:53,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-30 02:19:53,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 02:19:53,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:53,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 02:19:53,176 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 511 flow. Second operand 3 states and 554 transitions. [2023-08-30 02:19:53,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 1020 flow [2023-08-30 02:19:53,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 995 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 02:19:53,187 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 513 flow [2023-08-30 02:19:53,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=513, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2023-08-30 02:19:53,187 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2023-08-30 02:19:53,187 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 513 flow [2023-08-30 02:19:53,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 02:19:53,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:53,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:53,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:19:53,188 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:53,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash -154361138, now seen corresponding path program 1 times [2023-08-30 02:19:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103347994] [2023-08-30 02:19:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:53,840 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 02:19:53,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:53,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103347994] [2023-08-30 02:19:53,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103347994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:19:53,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738235839] [2023-08-30 02:19:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:53,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:19:53,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:19:53,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:19:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 351 [2023-08-30 02:19:54,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 513 flow. Second operand has 15 states, 15 states have (on average 138.46666666666667) internal successors, (2077), 15 states have internal predecessors, (2077), 0 states have call successors, (0), 0 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 02:19:54,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:54,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 351 [2023-08-30 02:19:54,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:55,984 INFO L130 PetriNetUnfolder]: 1633/3040 cut-off events. [2023-08-30 02:19:55,984 INFO L131 PetriNetUnfolder]: For 2940/2940 co-relation queries the response was YES. [2023-08-30 02:19:55,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9652 conditions, 3040 events. 1633/3040 cut-off events. For 2940/2940 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 15503 event pairs, 462 based on Foata normal form. 12/3052 useless extension candidates. Maximal degree in co-relation 9621. Up to 2369 conditions per place. [2023-08-30 02:19:56,009 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 159 selfloop transitions, 30 changer transitions 0/189 dead transitions. [2023-08-30 02:19:56,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 1337 flow [2023-08-30 02:19:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 02:19:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 02:19:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2617 transitions. [2023-08-30 02:19:56,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142133586578031 [2023-08-30 02:19:56,017 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2617 transitions. [2023-08-30 02:19:56,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2617 transitions. [2023-08-30 02:19:56,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:56,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2617 transitions. [2023-08-30 02:19:56,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 145.38888888888889) internal successors, (2617), 18 states have internal predecessors, (2617), 0 states have call successors, (0), 0 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 02:19:56,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 351.0) internal successors, (6669), 19 states have internal predecessors, (6669), 0 states have call successors, (0), 0 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 02:19:56,034 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 351.0) internal successors, (6669), 19 states have internal predecessors, (6669), 0 states have call successors, (0), 0 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 02:19:56,035 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 513 flow. Second operand 18 states and 2617 transitions. [2023-08-30 02:19:56,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 1337 flow [2023-08-30 02:19:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 1324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:19:56,050 INFO L231 Difference]: Finished difference. Result has 117 places, 103 transitions, 762 flow [2023-08-30 02:19:56,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=762, PETRI_PLACES=117, PETRI_TRANSITIONS=103} [2023-08-30 02:19:56,050 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2023-08-30 02:19:56,050 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 103 transitions, 762 flow [2023-08-30 02:19:56,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.46666666666667) internal successors, (2077), 15 states have internal predecessors, (2077), 0 states have call successors, (0), 0 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 02:19:56,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:56,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:56,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:19:56,052 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:56,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash -72213900, now seen corresponding path program 2 times [2023-08-30 02:19:56,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:56,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060515929] [2023-08-30 02:19:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:19:56,734 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 02:19:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:19:56,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060515929] [2023-08-30 02:19:56,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060515929] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:19:56,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:19:56,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:19:56,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58322859] [2023-08-30 02:19:56,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:19:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:19:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:19:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:19:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:19:58,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 351 [2023-08-30 02:19:58,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 103 transitions, 762 flow. Second operand has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 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 02:19:58,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:19:58,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 351 [2023-08-30 02:19:58,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:19:59,385 INFO L130 PetriNetUnfolder]: 1890/3518 cut-off events. [2023-08-30 02:19:59,386 INFO L131 PetriNetUnfolder]: For 4068/4068 co-relation queries the response was YES. [2023-08-30 02:19:59,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11964 conditions, 3518 events. 1890/3518 cut-off events. For 4068/4068 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 18684 event pairs, 547 based on Foata normal form. 12/3530 useless extension candidates. Maximal degree in co-relation 11924. Up to 2389 conditions per place. [2023-08-30 02:19:59,415 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 158 selfloop transitions, 38 changer transitions 0/196 dead transitions. [2023-08-30 02:19:59,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 196 transitions, 1546 flow [2023-08-30 02:19:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:19:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:19:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2030 transitions. [2023-08-30 02:19:59,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2023-08-30 02:19:59,420 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2030 transitions. [2023-08-30 02:19:59,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2030 transitions. [2023-08-30 02:19:59,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:19:59,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2030 transitions. [2023-08-30 02:19:59,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 145.0) internal successors, (2030), 14 states have internal predecessors, (2030), 0 states have call successors, (0), 0 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 02:19:59,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 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 02:19:59,473 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 351.0) internal successors, (5265), 15 states have internal predecessors, (5265), 0 states have call successors, (0), 0 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 02:19:59,473 INFO L175 Difference]: Start difference. First operand has 117 places, 103 transitions, 762 flow. Second operand 14 states and 2030 transitions. [2023-08-30 02:19:59,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 196 transitions, 1546 flow [2023-08-30 02:19:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 196 transitions, 1539 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:19:59,496 INFO L231 Difference]: Finished difference. Result has 135 places, 115 transitions, 990 flow [2023-08-30 02:19:59,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=990, PETRI_PLACES=135, PETRI_TRANSITIONS=115} [2023-08-30 02:19:59,497 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-08-30 02:19:59,497 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 115 transitions, 990 flow [2023-08-30 02:19:59,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 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 02:19:59,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:19:59,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:19:59,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:19:59,498 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:19:59,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:19:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1285038460, now seen corresponding path program 3 times [2023-08-30 02:19:59,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:19:59,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240094853] [2023-08-30 02:19:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:19:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:19:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:00,199 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 02:20:00,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240094853] [2023-08-30 02:20:00,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240094853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:00,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:00,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:20:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967506089] [2023-08-30 02:20:00,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:00,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:20:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:20:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:20:01,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 351 [2023-08-30 02:20:01,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 115 transitions, 990 flow. Second operand has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 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 02:20:01,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:01,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 351 [2023-08-30 02:20:01,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:02,980 INFO L130 PetriNetUnfolder]: 1878/3494 cut-off events. [2023-08-30 02:20:02,980 INFO L131 PetriNetUnfolder]: For 5394/5394 co-relation queries the response was YES. [2023-08-30 02:20:02,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12665 conditions, 3494 events. 1878/3494 cut-off events. For 5394/5394 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 18482 event pairs, 499 based on Foata normal form. 12/3506 useless extension candidates. Maximal degree in co-relation 12617. Up to 1905 conditions per place. [2023-08-30 02:20:03,001 INFO L137 encePairwiseOnDemand]: 334/351 looper letters, 148 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2023-08-30 02:20:03,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 1704 flow [2023-08-30 02:20:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:20:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:20:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2165 transitions. [2023-08-30 02:20:03,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41120607787274455 [2023-08-30 02:20:03,005 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2165 transitions. [2023-08-30 02:20:03,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2165 transitions. [2023-08-30 02:20:03,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:03,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2165 transitions. [2023-08-30 02:20:03,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 144.33333333333334) internal successors, (2165), 15 states have internal predecessors, (2165), 0 states have call successors, (0), 0 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 02:20:03,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 351.0) internal successors, (5616), 16 states have internal predecessors, (5616), 0 states have call successors, (0), 0 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 02:20:03,019 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 351.0) internal successors, (5616), 16 states have internal predecessors, (5616), 0 states have call successors, (0), 0 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 02:20:03,019 INFO L175 Difference]: Start difference. First operand has 135 places, 115 transitions, 990 flow. Second operand 15 states and 2165 transitions. [2023-08-30 02:20:03,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 1704 flow [2023-08-30 02:20:03,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 1655 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-30 02:20:03,049 INFO L231 Difference]: Finished difference. Result has 148 places, 122 transitions, 1147 flow [2023-08-30 02:20:03,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1147, PETRI_PLACES=148, PETRI_TRANSITIONS=122} [2023-08-30 02:20:03,050 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-08-30 02:20:03,050 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 122 transitions, 1147 flow [2023-08-30 02:20:03,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.375) internal successors, (2182), 16 states have internal predecessors, (2182), 0 states have call successors, (0), 0 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 02:20:03,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:03,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:03,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:20:03,052 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:03,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -784371860, now seen corresponding path program 1 times [2023-08-30 02:20:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775962010] [2023-08-30 02:20:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:20:03,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:03,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775962010] [2023-08-30 02:20:03,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775962010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:03,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027137974] [2023-08-30 02:20:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:03,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:03,101 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 02:20:03,130 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 02:20:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:03,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:20:03,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:20:03,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027137974] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:03,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:03,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:20:03,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981775625] [2023-08-30 02:20:03,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:03,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:03,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:03,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:03,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 351 [2023-08-30 02:20:03,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 122 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 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 02:20:03,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:03,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 351 [2023-08-30 02:20:03,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:04,129 INFO L130 PetriNetUnfolder]: 3617/6949 cut-off events. [2023-08-30 02:20:04,129 INFO L131 PetriNetUnfolder]: For 13751/13753 co-relation queries the response was YES. [2023-08-30 02:20:04,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26016 conditions, 6949 events. 3617/6949 cut-off events. For 13751/13753 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 45212 event pairs, 729 based on Foata normal form. 758/7706 useless extension candidates. Maximal degree in co-relation 25963. Up to 1593 conditions per place. [2023-08-30 02:20:04,183 INFO L137 encePairwiseOnDemand]: 346/351 looper letters, 375 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2023-08-30 02:20:04,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 403 transitions, 4640 flow [2023-08-30 02:20:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:20:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:20:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1111 transitions. [2023-08-30 02:20:04,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275403608736942 [2023-08-30 02:20:04,186 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1111 transitions. [2023-08-30 02:20:04,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1111 transitions. [2023-08-30 02:20:04,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:04,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1111 transitions. [2023-08-30 02:20:04,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.16666666666666) internal successors, (1111), 6 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 02:20:04,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 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 02:20:04,191 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 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 02:20:04,191 INFO L175 Difference]: Start difference. First operand has 148 places, 122 transitions, 1147 flow. Second operand 6 states and 1111 transitions. [2023-08-30 02:20:04,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 403 transitions, 4640 flow [2023-08-30 02:20:04,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 403 transitions, 4442 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-08-30 02:20:04,268 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 1291 flow [2023-08-30 02:20:04,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2023-08-30 02:20:04,269 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 99 predicate places. [2023-08-30 02:20:04,270 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 1291 flow [2023-08-30 02:20:04,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 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 02:20:04,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:04,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:04,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 02:20:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:04,477 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:04,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 586092581, now seen corresponding path program 1 times [2023-08-30 02:20:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403391500] [2023-08-30 02:20:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:20:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403391500] [2023-08-30 02:20:04,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403391500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:20:04,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869724480] [2023-08-30 02:20:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:04,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:04,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 02:20:04,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 02:20:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 02:20:04,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:05,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:05,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 02:20:05,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2023-08-30 02:20:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869724480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:05,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:20:05,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-30 02:20:05,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369061974] [2023-08-30 02:20:05,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:05,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 02:20:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:20:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 02:20:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-08-30 02:20:08,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 351 [2023-08-30 02:20:08,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 1291 flow. Second operand has 29 states, 29 states have (on average 146.44827586206895) internal successors, (4247), 29 states have internal predecessors, (4247), 0 states have call successors, (0), 0 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 02:20:08,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:08,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 351 [2023-08-30 02:20:08,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:12,298 INFO L130 PetriNetUnfolder]: 4889/9403 cut-off events. [2023-08-30 02:20:12,298 INFO L131 PetriNetUnfolder]: For 21134/21134 co-relation queries the response was YES. [2023-08-30 02:20:12,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 9403 events. 4889/9403 cut-off events. For 21134/21134 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 62479 event pairs, 747 based on Foata normal form. 260/9663 useless extension candidates. Maximal degree in co-relation 35954. Up to 1713 conditions per place. [2023-08-30 02:20:12,362 INFO L137 encePairwiseOnDemand]: 337/351 looper letters, 338 selfloop transitions, 103 changer transitions 0/441 dead transitions. [2023-08-30 02:20:12,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 441 transitions, 3951 flow [2023-08-30 02:20:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-30 02:20:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-30 02:20:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5941 transitions. [2023-08-30 02:20:12,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43399810066476735 [2023-08-30 02:20:12,370 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5941 transitions. [2023-08-30 02:20:12,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5941 transitions. [2023-08-30 02:20:12,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:12,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5941 transitions. [2023-08-30 02:20:12,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 152.33333333333334) internal successors, (5941), 39 states have internal predecessors, (5941), 0 states have call successors, (0), 0 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 02:20:12,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 351.0) internal successors, (14040), 40 states have internal predecessors, (14040), 0 states have call successors, (0), 0 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 02:20:12,400 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 351.0) internal successors, (14040), 40 states have internal predecessors, (14040), 0 states have call successors, (0), 0 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 02:20:12,400 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 1291 flow. Second operand 39 states and 5941 transitions. [2023-08-30 02:20:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 441 transitions, 3951 flow [2023-08-30 02:20:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 441 transitions, 3831 flow, removed 50 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:12,503 INFO L231 Difference]: Finished difference. Result has 199 places, 190 transitions, 2028 flow [2023-08-30 02:20:12,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2028, PETRI_PLACES=199, PETRI_TRANSITIONS=190} [2023-08-30 02:20:12,504 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-08-30 02:20:12,504 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 190 transitions, 2028 flow [2023-08-30 02:20:12,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 146.44827586206895) internal successors, (4247), 29 states have internal predecessors, (4247), 0 states have call successors, (0), 0 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 02:20:12,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:12,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:12,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:12,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:20:12,713 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:12,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1979566986, now seen corresponding path program 1 times [2023-08-30 02:20:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:20:12,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147402659] [2023-08-30 02:20:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:20:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:20:12,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:20:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:20:12,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 02:20:12,809 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:20:12,809 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-30 02:20:12,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-30 02:20:12,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-30 02:20:12,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-30 02:20:12,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-30 02:20:12,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-30 02:20:12,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-30 02:20:12,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-30 02:20:12,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-30 02:20:12,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-30 02:20:12,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-30 02:20:12,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:20:12,815 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:12,820 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 02:20:12,821 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 02:20:12,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 02:20:12 BasicIcfg [2023-08-30 02:20:12,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 02:20:12,891 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 02:20:12,891 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 02:20:12,891 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 02:20:12,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:19:33" (3/4) ... [2023-08-30 02:20:12,893 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-30 02:20:12,894 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 02:20:12,894 INFO L158 Benchmark]: Toolchain (without parser) took 40389.99ms. Allocated memory was 73.4MB in the beginning and 769.7MB in the end (delta: 696.3MB). Free memory was 49.9MB in the beginning and 473.2MB in the end (delta: -423.4MB). Peak memory consumption was 274.9MB. Max. memory is 16.1GB. [2023-08-30 02:20:12,894 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:20:12,896 INFO L158 Benchmark]: CACSL2BoogieTranslator took 697.75ms. Allocated memory was 73.4MB in the beginning and 98.6MB in the end (delta: 25.2MB). Free memory was 49.5MB in the beginning and 69.1MB in the end (delta: -19.7MB). Peak memory consumption was 28.8MB. Max. memory is 16.1GB. [2023-08-30 02:20:12,897 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.62ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 65.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 02:20:12,897 INFO L158 Benchmark]: Boogie Preprocessor took 65.06ms. Allocated memory is still 98.6MB. Free memory was 65.9MB in the beginning and 64.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:20:12,897 INFO L158 Benchmark]: RCFGBuilder took 635.73ms. Allocated memory is still 98.6MB. Free memory was 64.4MB in the beginning and 45.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-08-30 02:20:12,898 INFO L158 Benchmark]: TraceAbstraction took 38900.05ms. Allocated memory was 98.6MB in the beginning and 769.7MB in the end (delta: 671.1MB). Free memory was 44.4MB in the beginning and 474.3MB in the end (delta: -429.9MB). Peak memory consumption was 241.8MB. Max. memory is 16.1GB. [2023-08-30 02:20:12,898 INFO L158 Benchmark]: Witness Printer took 3.15ms. Allocated memory is still 769.7MB. Free memory was 474.3MB in the beginning and 473.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:20:12,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 73.4MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 697.75ms. Allocated memory was 73.4MB in the beginning and 98.6MB in the end (delta: 25.2MB). Free memory was 49.5MB in the beginning and 69.1MB in the end (delta: -19.7MB). Peak memory consumption was 28.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.62ms. Allocated memory is still 98.6MB. Free memory was 69.1MB in the beginning and 65.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.06ms. Allocated memory is still 98.6MB. Free memory was 65.9MB in the beginning and 64.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 635.73ms. Allocated memory is still 98.6MB. Free memory was 64.4MB in the beginning and 45.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 38900.05ms. Allocated memory was 98.6MB in the beginning and 769.7MB in the end (delta: 671.1MB). Free memory was 44.4MB in the beginning and 474.3MB in the end (delta: -429.9MB). Peak memory consumption was 241.8MB. Max. memory is 16.1GB. * Witness Printer took 3.15ms. Allocated memory is still 769.7MB. Free memory was 474.3MB in the beginning and 473.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 169 PlacesBefore, 49 PlacesAfterwards, 172 TransitionsBefore, 47 TransitionsAfterwards, 8718 CoEnabledTransitionPairs, 6 FixpointIterations, 45 TrivialSequentialCompositions, 101 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 173 TotalNumberOfCompositions, 13531 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10151, independent: 9934, independent conditional: 0, independent unconditional: 9934, dependent: 217, dependent conditional: 0, dependent unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5010, independent: 4954, independent conditional: 0, independent unconditional: 4954, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10151, independent: 4980, independent conditional: 0, independent unconditional: 4980, dependent: 161, dependent conditional: 0, dependent unconditional: 161, unknown: 5010, unknown conditional: 0, unknown unconditional: 5010] , Statistics on independence cache: Total cache size (in pairs): 316, Positive cache size: 296, Positive conditional cache size: 0, Positive unconditional cache size: 296, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=1, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=1, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 274 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 38.6s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 26.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7077 SdHoareTripleChecker+Valid, 15.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6183 mSDsluCounter, 9683 SdHoareTripleChecker+Invalid, 13.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9388 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34362 IncrementalHoareTripleChecker+Invalid, 34540 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 295 mSDtfsCounter, 34362 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=22, InterpolantAutomatonStates: 177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 393 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 4036 SizeOfPredicates, 22 NumberOfNonLiveVariables, 921 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 30 InterpolantComputations, 18 PerfectInterpolantSequences, 9/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-30 02:20:12,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/pthread/stack-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --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 02:20:14,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:20:14,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:20:15,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:20:15,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:20:15,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:20:15,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:20:15,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:20:15,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:20:15,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:20:15,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:20:15,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:20:15,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:20:15,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:20:15,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:20:15,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:20:15,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:20:15,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:20:15,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:20:15,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:20:15,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:20:15,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:20:15,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:20:15,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:20:15,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:20:15,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:20:15,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:20:15,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:20:15,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:20:15,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:20:15,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:20:15,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:20:15,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:20:15,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:20:15,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:20:15,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:20:15,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:20:15,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:20:15,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:20:15,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:20:15,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:20:15,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 02:20:15,122 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:20:15,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:20:15,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:20:15,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:20:15,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:20:15,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:20:15,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:20:15,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:20:15,125 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:20:15,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:20:15,126 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:20:15,127 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:20:15,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:20:15,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:20:15,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:20:15,127 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:20:15,128 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:20:15,128 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:20:15,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:20:15,128 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:20:15,128 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 02:20:15,128 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 02:20:15,129 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:20:15,129 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:20:15,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:20:15,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:20:15,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:20:15,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:20:15,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:20:15,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:20:15,130 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 02:20:15,130 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 02:20:15,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:20:15,131 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:20:15,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:20:15,131 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 02:20:15,132 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:20:15,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:20:15,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:20:15,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:20:15,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:20:15,470 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:20:15,470 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:20:15,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-2.i [2023-08-30 02:20:16,744 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:20:17,083 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:20:17,084 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i [2023-08-30 02:20:17,098 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21949818d/4dbf4ff97df34e14a1bde5960d427a1c/FLAG83c79302f [2023-08-30 02:20:17,115 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21949818d/4dbf4ff97df34e14a1bde5960d427a1c [2023-08-30 02:20:17,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:20:17,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:20:17,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:20:17,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:20:17,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:20:17,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379e945d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17, skipping insertion in model container [2023-08-30 02:20:17,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:20:17,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:20:17,591 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-08-30 02:20:17,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:20:17,643 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:20:17,682 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-2.i[41520,41533] [2023-08-30 02:20:17,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:20:17,766 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:20:17,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17 WrapperNode [2023-08-30 02:20:17,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:20:17,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:20:17,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:20:17,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:20:17,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,827 INFO L138 Inliner]: procedures = 281, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-08-30 02:20:17,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:20:17,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:20:17,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:20:17,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:20:17,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,876 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:20:17,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:20:17,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:20:17,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:20:17,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (1/1) ... [2023-08-30 02:20:17,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:20:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:20:17,914 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 02:20:17,930 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 02:20:17,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 02:20:17,958 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:20:17,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:20:17,959 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:20:17,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:20:17,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:20:17,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:20:17,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:20:17,962 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 02:20:18,087 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:20:18,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:20:18,504 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:20:18,517 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:20:18,517 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:20:18,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:18 BoogieIcfgContainer [2023-08-30 02:20:18,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:20:18,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:20:18,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:20:18,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:20:18,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:20:17" (1/3) ... [2023-08-30 02:20:18,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1367a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:20:18, skipping insertion in model container [2023-08-30 02:20:18,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:20:17" (2/3) ... [2023-08-30 02:20:18,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1367a8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:20:18, skipping insertion in model container [2023-08-30 02:20:18,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:18" (3/3) ... [2023-08-30 02:20:18,527 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-08-30 02:20:18,542 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:20:18,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-30 02:20:18,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:20:18,674 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:20:18,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2023-08-30 02:20:18,804 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2023-08-30 02:20:18,805 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:20:18,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 423 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-30 02:20:18,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2023-08-30 02:20:18,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 168 transitions, 348 flow [2023-08-30 02:20:18,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:20:18,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-30 02:20:18,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 168 transitions, 348 flow [2023-08-30 02:20:18,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 168 transitions, 348 flow [2023-08-30 02:20:18,906 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2023-08-30 02:20:18,906 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:20:18,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 422 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 121. Up to 3 conditions per place. [2023-08-30 02:20:18,916 INFO L119 LiptonReduction]: Number of co-enabled transitions 8060 [2023-08-30 02:20:28,027 INFO L134 LiptonReduction]: Checked pairs total: 12825 [2023-08-30 02:20:28,028 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-30 02:20:28,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:20:28,046 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;@14055cda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:20:28,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-30 02:20:28,048 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:20:28,048 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:20:28,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:28,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:20:28,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:28,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash 707, now seen corresponding path program 1 times [2023-08-30 02:20:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473592270] [2023-08-30 02:20:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:28,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:28,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:28,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 02:20:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2023-08-30 02:20:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:28,144 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 02:20:28,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:28,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:28,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473592270] [2023-08-30 02:20:28,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473592270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:28,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:28,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:20:28,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188109912] [2023-08-30 02:20:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:28,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:20:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:20:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:20:28,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 342 [2023-08-30 02:20:28,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 02:20:28,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:28,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 342 [2023-08-30 02:20:28,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:28,627 INFO L130 PetriNetUnfolder]: 1445/2252 cut-off events. [2023-08-30 02:20:28,628 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 02:20:28,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2252 events. 1445/2252 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10541 event pairs, 1169 based on Foata normal form. 0/1244 useless extension candidates. Maximal degree in co-relation 4252. Up to 2225 conditions per place. [2023-08-30 02:20:28,657 INFO L137 encePairwiseOnDemand]: 340/342 looper letters, 44 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-30 02:20:28,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 190 flow [2023-08-30 02:20:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:20:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:20:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-30 02:20:28,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-08-30 02:20:28,672 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-30 02:20:28,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-30 02:20:28,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:28,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-30 02:20:28,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 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 02:20:28,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:20:28,685 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 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 02:20:28,686 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 106 flow. Second operand 2 states and 372 transitions. [2023-08-30 02:20:28,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 190 flow [2023-08-30 02:20:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:20:28,692 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 94 flow [2023-08-30 02:20:28,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-30 02:20:28,696 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:20:28,697 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 94 flow [2023-08-30 02:20:28,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 02:20:28,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:28,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:20:28,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 02:20:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:28,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:28,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash 694736, now seen corresponding path program 1 times [2023-08-30 02:20:28,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230014945] [2023-08-30 02:20:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:28,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:28,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:28,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:28,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 02:20:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:29,082 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:20:29,084 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 02:20:29,111 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 02:20:29,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:29,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:29,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230014945] [2023-08-30 02:20:29,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230014945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:29,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:29,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:29,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430903919] [2023-08-30 02:20:29,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:29,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:29,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:29,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-30 02:20:29,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 02:20:29,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:29,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-30 02:20:29,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:29,460 INFO L130 PetriNetUnfolder]: 1416/2196 cut-off events. [2023-08-30 02:20:29,461 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:29,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4381 conditions, 2196 events. 1416/2196 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10203 event pairs, 1145 based on Foata normal form. 0/1225 useless extension candidates. Maximal degree in co-relation 4378. Up to 2168 conditions per place. [2023-08-30 02:20:29,473 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 40 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 02:20:29,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 174 flow [2023-08-30 02:20:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 02:20:29,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048732943469786 [2023-08-30 02:20:29,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 02:20:29,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 02:20:29,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:29,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 02:20:29,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 02:20:29,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:29,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:29,484 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 94 flow. Second operand 3 states and 518 transitions. [2023-08-30 02:20:29,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 174 flow [2023-08-30 02:20:29,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:29,485 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 94 flow [2023-08-30 02:20:29,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-30 02:20:29,486 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -5 predicate places. [2023-08-30 02:20:29,487 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 94 flow [2023-08-30 02:20:29,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 02:20:29,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:29,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:20:29,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:29,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:29,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 694735, now seen corresponding path program 1 times [2023-08-30 02:20:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:29,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714291176] [2023-08-30 02:20:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:29,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:29,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:29,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:29,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 02:20:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:29,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:29,792 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 02:20:29,793 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 19 [2023-08-30 02:20:29,803 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 02:20:29,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:29,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714291176] [2023-08-30 02:20:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714291176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:29,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:29,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657726077] [2023-08-30 02:20:29,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:29,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-08-30 02:20:29,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 02:20:29,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:29,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-08-30 02:20:29,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:30,064 INFO L130 PetriNetUnfolder]: 1387/2140 cut-off events. [2023-08-30 02:20:30,064 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:30,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2140 events. 1387/2140 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9853 event pairs, 1121 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 4269. Up to 2113 conditions per place. [2023-08-30 02:20:30,084 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 38 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-30 02:20:30,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 170 flow [2023-08-30 02:20:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-30 02:20:30,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-08-30 02:20:30,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-30 02:20:30,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-30 02:20:30,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:30,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-30 02:20:30,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 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 02:20:30,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:30,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:30,092 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 94 flow. Second operand 3 states and 504 transitions. [2023-08-30 02:20:30,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 170 flow [2023-08-30 02:20:30,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:30,094 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 90 flow [2023-08-30 02:20:30,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-30 02:20:30,095 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:20:30,096 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 90 flow [2023-08-30 02:20:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 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 02:20:30,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:30,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:20:30,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:30,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:30,306 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:30,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:30,307 INFO L85 PathProgramCache]: Analyzing trace with hash 667655670, now seen corresponding path program 1 times [2023-08-30 02:20:30,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:30,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095642255] [2023-08-30 02:20:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:30,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:30,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:30,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:30,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 02:20:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:30,412 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 02:20:30,413 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 02:20:30,449 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 02:20:30,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:30,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:30,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095642255] [2023-08-30 02:20:30,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095642255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:30,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:30,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595747638] [2023-08-30 02:20:30,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:30,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:30,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-08-30 02:20:30,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:30,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:30,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-08-30 02:20:30,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:30,730 INFO L130 PetriNetUnfolder]: 1013/1592 cut-off events. [2023-08-30 02:20:30,731 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:30,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 1592 events. 1013/1592 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7048 event pairs, 811 based on Foata normal form. 0/970 useless extension candidates. Maximal degree in co-relation 3179. Up to 1571 conditions per place. [2023-08-30 02:20:30,738 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-30 02:20:30,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 166 flow [2023-08-30 02:20:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2023-08-30 02:20:30,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48927875243664715 [2023-08-30 02:20:30,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2023-08-30 02:20:30,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2023-08-30 02:20:30,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:30,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2023-08-30 02:20:30,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 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 02:20:30,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:30,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:30,746 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 90 flow. Second operand 3 states and 502 transitions. [2023-08-30 02:20:30,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 166 flow [2023-08-30 02:20:30,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:30,748 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2023-08-30 02:20:30,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-30 02:20:30,749 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -8 predicate places. [2023-08-30 02:20:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2023-08-30 02:20:30,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:30,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:30,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:20:30,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:30,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:30,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 667655669, now seen corresponding path program 1 times [2023-08-30 02:20:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:30,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318134445] [2023-08-30 02:20:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:30,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:30,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:30,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 02:20:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 02:20:31,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:31,073 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 02:20:31,074 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 11 [2023-08-30 02:20:31,129 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 02:20:31,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:31,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:31,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318134445] [2023-08-30 02:20:31,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318134445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:31,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:31,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:20:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950750324] [2023-08-30 02:20:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:31,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:31,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:31,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-30 02:20:31,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 02:20:31,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:31,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-30 02:20:31,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:31,367 INFO L130 PetriNetUnfolder]: 639/1044 cut-off events. [2023-08-30 02:20:31,368 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 02:20:31,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 1044 events. 639/1044 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4435 event pairs, 501 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 2089. Up to 1029 conditions per place. [2023-08-30 02:20:31,373 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 36 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-30 02:20:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 162 flow [2023-08-30 02:20:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 02:20:31,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-30 02:20:31,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 02:20:31,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 02:20:31,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:31,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 02:20:31,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 02:20:31,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:31,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:31,380 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 513 transitions. [2023-08-30 02:20:31,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 162 flow [2023-08-30 02:20:31,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:31,382 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2023-08-30 02:20:31,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2023-08-30 02:20:31,383 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -9 predicate places. [2023-08-30 02:20:31,383 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2023-08-30 02:20:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 02:20:31,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:31,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:20:31,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-08-30 02:20:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:31,594 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:31,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash -778212206, now seen corresponding path program 1 times [2023-08-30 02:20:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:31,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190055693] [2023-08-30 02:20:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:31,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:31,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 02:20:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:31,687 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 02:20:31,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:31,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:31,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190055693] [2023-08-30 02:20:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190055693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:31,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:31,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:20:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830120862] [2023-08-30 02:20:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:31,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-30 02:20:31,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 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 02:20:31,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:31,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-30 02:20:31,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:31,943 INFO L130 PetriNetUnfolder]: 1075/1762 cut-off events. [2023-08-30 02:20:31,943 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-30 02:20:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1762 events. 1075/1762 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7985 event pairs, 312 based on Foata normal form. 0/1264 useless extension candidates. Maximal degree in co-relation 3522. Up to 1042 conditions per place. [2023-08-30 02:20:31,951 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-30 02:20:31,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 291 flow [2023-08-30 02:20:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-30 02:20:31,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331384015594542 [2023-08-30 02:20:31,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-30 02:20:31,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-30 02:20:31,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:31,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-30 02:20:31,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 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 02:20:31,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:31,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:31,959 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 547 transitions. [2023-08-30 02:20:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 291 flow [2023-08-30 02:20:31,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 70 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:31,963 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 112 flow [2023-08-30 02:20:31,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-30 02:20:31,966 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2023-08-30 02:20:31,967 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 112 flow [2023-08-30 02:20:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 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 02:20:31,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:31,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:20:31,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:32,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:32,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash -778213138, now seen corresponding path program 1 times [2023-08-30 02:20:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825998683] [2023-08-30 02:20:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:32,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:32,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:32,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 02:20:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 02:20:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:32,321 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 02:20:32,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2023-08-30 02:20:32,338 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 02:20:32,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 02:20:32,625 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 02:20:32,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:32,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:32,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825998683] [2023-08-30 02:20:32,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825998683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:32,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:32,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:32,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825979932] [2023-08-30 02:20:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:32,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:20:32,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:20:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:20:33,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-30 02:20:33,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 02:20:33,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:33,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-30 02:20:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:33,966 INFO L130 PetriNetUnfolder]: 1340/2193 cut-off events. [2023-08-30 02:20:33,967 INFO L131 PetriNetUnfolder]: For 326/326 co-relation queries the response was YES. [2023-08-30 02:20:33,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 2193 events. 1340/2193 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10128 event pairs, 243 based on Foata normal form. 0/1695 useless extension candidates. Maximal degree in co-relation 4726. Up to 1690 conditions per place. [2023-08-30 02:20:33,977 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 91 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2023-08-30 02:20:33,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 449 flow [2023-08-30 02:20:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:20:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:20:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 876 transitions. [2023-08-30 02:20:33,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2023-08-30 02:20:33,981 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 876 transitions. [2023-08-30 02:20:33,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 876 transitions. [2023-08-30 02:20:33,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:33,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 876 transitions. [2023-08-30 02:20:33,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.2) internal successors, (876), 5 states have internal predecessors, (876), 0 states have call successors, (0), 0 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 02:20:33,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 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 02:20:33,986 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 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 02:20:33,986 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 112 flow. Second operand 5 states and 876 transitions. [2023-08-30 02:20:33,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 449 flow [2023-08-30 02:20:33,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:33,991 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 157 flow [2023-08-30 02:20:33,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-30 02:20:33,992 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-30 02:20:33,992 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 157 flow [2023-08-30 02:20:33,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 02:20:33,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:33,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:20:34,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:34,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:34,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash -778213139, now seen corresponding path program 1 times [2023-08-30 02:20:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:34,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491310561] [2023-08-30 02:20:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:34,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:34,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:34,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:34,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 02:20:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 02:20:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:34,322 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-08-30 02:20:34,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2023-08-30 02:20:34,448 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 02:20:34,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:34,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491310561] [2023-08-30 02:20:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491310561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:34,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:34,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:34,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642906324] [2023-08-30 02:20:34,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:34,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:20:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:20:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:20:34,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 342 [2023-08-30 02:20:34,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 02:20:34,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:34,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 342 [2023-08-30 02:20:34,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:35,393 INFO L130 PetriNetUnfolder]: 1527/2494 cut-off events. [2023-08-30 02:20:35,393 INFO L131 PetriNetUnfolder]: For 531/531 co-relation queries the response was YES. [2023-08-30 02:20:35,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 2494 events. 1527/2494 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12159 event pairs, 505 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 5702. Up to 1668 conditions per place. [2023-08-30 02:20:35,412 INFO L137 encePairwiseOnDemand]: 336/342 looper letters, 88 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2023-08-30 02:20:35,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 477 flow [2023-08-30 02:20:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:20:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:20:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 864 transitions. [2023-08-30 02:20:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2023-08-30 02:20:35,417 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 864 transitions. [2023-08-30 02:20:35,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 864 transitions. [2023-08-30 02:20:35,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:35,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 864 transitions. [2023-08-30 02:20:35,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 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 02:20:35,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 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 02:20:35,424 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 342.0) internal successors, (2052), 6 states have internal predecessors, (2052), 0 states have call successors, (0), 0 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 02:20:35,424 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 157 flow. Second operand 5 states and 864 transitions. [2023-08-30 02:20:35,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 477 flow [2023-08-30 02:20:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 97 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:35,427 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 200 flow [2023-08-30 02:20:35,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-08-30 02:20:35,431 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 02:20:35,431 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 200 flow [2023-08-30 02:20:35,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 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 02:20:35,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:35,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:35,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:35,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:35,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:35,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -48791214, now seen corresponding path program 1 times [2023-08-30 02:20:35,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:35,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993027109] [2023-08-30 02:20:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:35,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:35,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:35,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 02:20:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:35,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:35,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:35,727 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 02:20:35,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:35,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:35,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993027109] [2023-08-30 02:20:35,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993027109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:35,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:35,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:20:35,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127813372] [2023-08-30 02:20:35,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:35,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:35,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:35,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:35,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-30 02:20:35,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 02:20:35,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:35,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-30 02:20:35,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:36,020 INFO L130 PetriNetUnfolder]: 1272/2115 cut-off events. [2023-08-30 02:20:36,021 INFO L131 PetriNetUnfolder]: For 832/832 co-relation queries the response was YES. [2023-08-30 02:20:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4966 conditions, 2115 events. 1272/2115 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9962 event pairs, 578 based on Foata normal form. 0/1809 useless extension candidates. Maximal degree in co-relation 4955. Up to 1371 conditions per place. [2023-08-30 02:20:36,031 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 65 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 02:20:36,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 366 flow [2023-08-30 02:20:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-30 02:20:36,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243664717348928 [2023-08-30 02:20:36,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-30 02:20:36,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-30 02:20:36,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:36,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-30 02:20:36,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 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 02:20:36,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:36,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:36,038 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 200 flow. Second operand 3 states and 538 transitions. [2023-08-30 02:20:36,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 366 flow [2023-08-30 02:20:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 341 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 02:20:36,042 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 159 flow [2023-08-30 02:20:36,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-30 02:20:36,043 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-30 02:20:36,043 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 159 flow [2023-08-30 02:20:36,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 02:20:36,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:36,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:36,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:36,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:36,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2144972854, now seen corresponding path program 1 times [2023-08-30 02:20:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201060168] [2023-08-30 02:20:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:36,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:36,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:36,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 02:20:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:20:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:36,337 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 02:20:36,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:36,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:36,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201060168] [2023-08-30 02:20:36,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201060168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:36,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:36,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:20:36,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711582631] [2023-08-30 02:20:36,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:36,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:36,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:36,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-30 02:20:36,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 02:20:36,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:36,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-30 02:20:36,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:36,622 INFO L130 PetriNetUnfolder]: 1367/2262 cut-off events. [2023-08-30 02:20:36,623 INFO L131 PetriNetUnfolder]: For 699/699 co-relation queries the response was YES. [2023-08-30 02:20:36,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5441 conditions, 2262 events. 1367/2262 cut-off events. For 699/699 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10896 event pairs, 972 based on Foata normal form. 66/2120 useless extension candidates. Maximal degree in co-relation 5432. Up to 2056 conditions per place. [2023-08-30 02:20:36,633 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 65 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-08-30 02:20:36,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 370 flow [2023-08-30 02:20:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 02:20:36,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214424951267057 [2023-08-30 02:20:36,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 02:20:36,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 02:20:36,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:36,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 02:20:36,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:20:36,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:36,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:36,640 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 159 flow. Second operand 3 states and 535 transitions. [2023-08-30 02:20:36,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 370 flow [2023-08-30 02:20:36,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:36,647 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 182 flow [2023-08-30 02:20:36,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-30 02:20:36,649 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-30 02:20:36,649 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 182 flow [2023-08-30 02:20:36,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 02:20:36,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:36,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:36,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:36,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:36,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -642736256, now seen corresponding path program 1 times [2023-08-30 02:20:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:36,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137605409] [2023-08-30 02:20:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:36,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:36,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:36,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 02:20:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:36,937 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 02:20:36,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:36,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:36,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137605409] [2023-08-30 02:20:36,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137605409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:36,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:36,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:36,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146627036] [2023-08-30 02:20:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:36,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-30 02:20:36,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 02:20:36,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:36,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-30 02:20:36,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:37,212 INFO L130 PetriNetUnfolder]: 1452/2429 cut-off events. [2023-08-30 02:20:37,213 INFO L131 PetriNetUnfolder]: For 1025/1025 co-relation queries the response was YES. [2023-08-30 02:20:37,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6029 conditions, 2429 events. 1452/2429 cut-off events. For 1025/1025 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12637 event pairs, 662 based on Foata normal form. 12/2167 useless extension candidates. Maximal degree in co-relation 6019. Up to 2082 conditions per place. [2023-08-30 02:20:37,223 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 71 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-30 02:20:37,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 74 transitions, 397 flow [2023-08-30 02:20:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-30 02:20:37,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272904483430799 [2023-08-30 02:20:37,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-30 02:20:37,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-30 02:20:37,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:37,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-30 02:20:37,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 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 02:20:37,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:37,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:37,229 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 182 flow. Second operand 3 states and 541 transitions. [2023-08-30 02:20:37,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 74 transitions, 397 flow [2023-08-30 02:20:37,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 74 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:20:37,235 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 184 flow [2023-08-30 02:20:37,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-30 02:20:37,236 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-30 02:20:37,236 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 184 flow [2023-08-30 02:20:37,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 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 02:20:37,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:37,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:37,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:37,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:37,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:37,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1556724250, now seen corresponding path program 1 times [2023-08-30 02:20:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961576107] [2023-08-30 02:20:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:37,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:37,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:37,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 02:20:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:37,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:37,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:37,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961576107] [2023-08-30 02:20:37,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961576107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:37,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 02:20:37,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-08-30 02:20:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111041073] [2023-08-30 02:20:37,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 02:20:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 02:20:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 02:20:37,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 342 [2023-08-30 02:20:37,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 158.375) internal successors, (1267), 8 states have internal predecessors, (1267), 0 states have call successors, (0), 0 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 02:20:37,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:37,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 342 [2023-08-30 02:20:37,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:38,694 INFO L130 PetriNetUnfolder]: 3718/6089 cut-off events. [2023-08-30 02:20:38,694 INFO L131 PetriNetUnfolder]: For 2338/2338 co-relation queries the response was YES. [2023-08-30 02:20:38,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15406 conditions, 6089 events. 3718/6089 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 32943 event pairs, 589 based on Foata normal form. 100/5439 useless extension candidates. Maximal degree in co-relation 15395. Up to 1333 conditions per place. [2023-08-30 02:20:38,764 INFO L137 encePairwiseOnDemand]: 335/342 looper letters, 282 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2023-08-30 02:20:38,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 314 transitions, 1586 flow [2023-08-30 02:20:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:20:38,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:20:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2306 transitions. [2023-08-30 02:20:38,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186684660368871 [2023-08-30 02:20:38,772 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2306 transitions. [2023-08-30 02:20:38,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2306 transitions. [2023-08-30 02:20:38,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:38,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2306 transitions. [2023-08-30 02:20:38,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 177.3846153846154) internal successors, (2306), 13 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 02:20:38,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 342.0) internal successors, (4788), 14 states have internal predecessors, (4788), 0 states have call successors, (0), 0 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 02:20:38,786 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 342.0) internal successors, (4788), 14 states have internal predecessors, (4788), 0 states have call successors, (0), 0 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 02:20:38,787 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 184 flow. Second operand 13 states and 2306 transitions. [2023-08-30 02:20:38,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 314 transitions, 1586 flow [2023-08-30 02:20:38,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 314 transitions, 1582 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:38,796 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 428 flow [2023-08-30 02:20:38,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-08-30 02:20:38,797 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-08-30 02:20:38,797 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 428 flow [2023-08-30 02:20:38,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 158.375) internal successors, (1267), 8 states have internal predecessors, (1267), 0 states have call successors, (0), 0 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 02:20:38,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:38,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:38,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:39,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:39,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:39,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1556725182, now seen corresponding path program 1 times [2023-08-30 02:20:39,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:39,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398476257] [2023-08-30 02:20:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:39,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:39,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:39,010 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 02:20:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:39,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 02:20:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:39,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 02:20:39,154 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 02:20:39,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-30 02:20:39,188 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2023-08-30 02:20:39,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2023-08-30 02:20:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:39,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:20:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:20:39,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:39,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398476257] [2023-08-30 02:20:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398476257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:20:39,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 02:20:39,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 02:20:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411667358] [2023-08-30 02:20:39,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 02:20:39,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:20:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:20:39,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:20:42,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 342 [2023-08-30 02:20:42,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 428 flow. Second operand has 12 states, 12 states have (on average 152.33333333333334) internal successors, (1828), 12 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 02:20:42,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:42,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 342 [2023-08-30 02:20:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:45,456 INFO L130 PetriNetUnfolder]: 5558/9121 cut-off events. [2023-08-30 02:20:45,456 INFO L131 PetriNetUnfolder]: For 7872/7872 co-relation queries the response was YES. [2023-08-30 02:20:45,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25157 conditions, 9121 events. 5558/9121 cut-off events. For 7872/7872 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 53355 event pairs, 1601 based on Foata normal form. 90/8101 useless extension candidates. Maximal degree in co-relation 25143. Up to 5884 conditions per place. [2023-08-30 02:20:45,513 INFO L137 encePairwiseOnDemand]: 335/342 looper letters, 261 selfloop transitions, 27 changer transitions 0/288 dead transitions. [2023-08-30 02:20:45,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 288 transitions, 1701 flow [2023-08-30 02:20:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:20:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:20:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2329 transitions. [2023-08-30 02:20:45,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48642439431913115 [2023-08-30 02:20:45,520 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2329 transitions. [2023-08-30 02:20:45,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2329 transitions. [2023-08-30 02:20:45,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:45,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2329 transitions. [2023-08-30 02:20:45,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.35714285714286) internal successors, (2329), 14 states have internal predecessors, (2329), 0 states have call successors, (0), 0 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 02:20:45,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 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 02:20:45,535 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 342.0) internal successors, (5130), 15 states have internal predecessors, (5130), 0 states have call successors, (0), 0 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 02:20:45,535 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 428 flow. Second operand 14 states and 2329 transitions. [2023-08-30 02:20:45,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 288 transitions, 1701 flow [2023-08-30 02:20:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 288 transitions, 1641 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:45,569 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 671 flow [2023-08-30 02:20:45,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=671, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2023-08-30 02:20:45,570 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2023-08-30 02:20:45,570 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 671 flow [2023-08-30 02:20:45,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.33333333333334) internal successors, (1828), 12 states have internal predecessors, (1828), 0 states have call successors, (0), 0 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 02:20:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:45,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:45,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:45,782 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:45,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 921987, now seen corresponding path program 1 times [2023-08-30 02:20:45,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:45,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98696918] [2023-08-30 02:20:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:45,784 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:45,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 02:20:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 02:20:45,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:45,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-08-30 02:20:45,892 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 02:20:45,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:45,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:45,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98696918] [2023-08-30 02:20:45,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98696918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:45,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:45,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:45,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995945658] [2023-08-30 02:20:45,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:45,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:45,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:45,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:45,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:45,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 342 [2023-08-30 02:20:45,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 671 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 02:20:45,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:45,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 342 [2023-08-30 02:20:45,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:46,245 INFO L130 PetriNetUnfolder]: 1329/2548 cut-off events. [2023-08-30 02:20:46,246 INFO L131 PetriNetUnfolder]: For 3151/3151 co-relation queries the response was YES. [2023-08-30 02:20:46,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 2548 events. 1329/2548 cut-off events. For 3151/3151 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13382 event pairs, 235 based on Foata normal form. 120/2490 useless extension candidates. Maximal degree in co-relation 7207. Up to 1916 conditions per place. [2023-08-30 02:20:46,258 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 67 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2023-08-30 02:20:46,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 603 flow [2023-08-30 02:20:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 519 transitions. [2023-08-30 02:20:46,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058479532163743 [2023-08-30 02:20:46,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 519 transitions. [2023-08-30 02:20:46,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 519 transitions. [2023-08-30 02:20:46,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:46,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 519 transitions. [2023-08-30 02:20:46,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 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 02:20:46,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:46,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:46,265 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 671 flow. Second operand 3 states and 519 transitions. [2023-08-30 02:20:46,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 603 flow [2023-08-30 02:20:46,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 583 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-30 02:20:46,279 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 425 flow [2023-08-30 02:20:46,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-08-30 02:20:46,279 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2023-08-30 02:20:46,280 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 425 flow [2023-08-30 02:20:46,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 02:20:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:46,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:46,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:46,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:46,490 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:46,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1594065870, now seen corresponding path program 1 times [2023-08-30 02:20:46,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:46,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926770129] [2023-08-30 02:20:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:46,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:46,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:46,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 02:20:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:46,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 02:20:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:46,640 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 02:20:46,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:46,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:46,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926770129] [2023-08-30 02:20:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926770129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:46,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:46,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:20:46,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333091550] [2023-08-30 02:20:46,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:46,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:20:46,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:20:46,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:20:46,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 342 [2023-08-30 02:20:46,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 02:20:46,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:46,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 342 [2023-08-30 02:20:46,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:47,485 INFO L130 PetriNetUnfolder]: 1681/3192 cut-off events. [2023-08-30 02:20:47,486 INFO L131 PetriNetUnfolder]: For 2562/2562 co-relation queries the response was YES. [2023-08-30 02:20:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9215 conditions, 3192 events. 1681/3192 cut-off events. For 2562/2562 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17039 event pairs, 409 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 9192. Up to 1584 conditions per place. [2023-08-30 02:20:47,506 INFO L137 encePairwiseOnDemand]: 334/342 looper letters, 105 selfloop transitions, 10 changer transitions 0/121 dead transitions. [2023-08-30 02:20:47,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 871 flow [2023-08-30 02:20:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 02:20:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 02:20:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1287 transitions. [2023-08-30 02:20:47,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47039473684210525 [2023-08-30 02:20:47,510 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1287 transitions. [2023-08-30 02:20:47,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1287 transitions. [2023-08-30 02:20:47,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:47,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1287 transitions. [2023-08-30 02:20:47,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 0 states have call successors, (0), 0 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 02:20:47,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 342.0) internal successors, (3078), 9 states have internal predecessors, (3078), 0 states have call successors, (0), 0 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 02:20:47,518 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 342.0) internal successors, (3078), 9 states have internal predecessors, (3078), 0 states have call successors, (0), 0 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 02:20:47,518 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 425 flow. Second operand 8 states and 1287 transitions. [2023-08-30 02:20:47,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 871 flow [2023-08-30 02:20:47,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 857 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:47,531 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 482 flow [2023-08-30 02:20:47,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=482, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-08-30 02:20:47,531 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 38 predicate places. [2023-08-30 02:20:47,532 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 482 flow [2023-08-30 02:20:47,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 02:20:47,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:47,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:47,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:47,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:47,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:47,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1513666805, now seen corresponding path program 1 times [2023-08-30 02:20:47,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:47,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952053317] [2023-08-30 02:20:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:47,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:47,744 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:47,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 02:20:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:47,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 02:20:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:48,119 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 02:20:48,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:48,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:48,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952053317] [2023-08-30 02:20:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952053317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:48,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:48,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:20:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857559694] [2023-08-30 02:20:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:48,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:20:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:20:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:20:49,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 342 [2023-08-30 02:20:49,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 482 flow. Second operand has 13 states, 13 states have (on average 144.53846153846155) internal successors, (1879), 13 states have internal predecessors, (1879), 0 states have call successors, (0), 0 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 02:20:49,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:49,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 342 [2023-08-30 02:20:49,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:51,020 INFO L130 PetriNetUnfolder]: 2326/4329 cut-off events. [2023-08-30 02:20:51,020 INFO L131 PetriNetUnfolder]: For 3335/3335 co-relation queries the response was YES. [2023-08-30 02:20:51,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 4329 events. 2326/4329 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24551 event pairs, 697 based on Foata normal form. 38/4331 useless extension candidates. Maximal degree in co-relation 12396. Up to 2874 conditions per place. [2023-08-30 02:20:51,037 INFO L137 encePairwiseOnDemand]: 327/342 looper letters, 191 selfloop transitions, 33 changer transitions 0/224 dead transitions. [2023-08-30 02:20:51,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 224 transitions, 1476 flow [2023-08-30 02:20:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:20:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:20:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2610 transitions. [2023-08-30 02:20:51,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2023-08-30 02:20:51,049 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2610 transitions. [2023-08-30 02:20:51,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2610 transitions. [2023-08-30 02:20:51,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:51,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2610 transitions. [2023-08-30 02:20:51,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 153.52941176470588) internal successors, (2610), 17 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 02:20:51,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 342.0) internal successors, (6156), 18 states have internal predecessors, (6156), 0 states have call successors, (0), 0 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 02:20:51,064 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 342.0) internal successors, (6156), 18 states have internal predecessors, (6156), 0 states have call successors, (0), 0 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 02:20:51,065 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 482 flow. Second operand 17 states and 2610 transitions. [2023-08-30 02:20:51,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 224 transitions, 1476 flow [2023-08-30 02:20:51,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 224 transitions, 1471 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:20:51,079 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 820 flow [2023-08-30 02:20:51,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=820, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2023-08-30 02:20:51,081 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 65 predicate places. [2023-08-30 02:20:51,081 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 820 flow [2023-08-30 02:20:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 144.53846153846155) internal successors, (1879), 13 states have internal predecessors, (1879), 0 states have call successors, (0), 0 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 02:20:51,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:51,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:51,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:51,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:51,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:51,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1081105184, now seen corresponding path program 1 times [2023-08-30 02:20:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967778872] [2023-08-30 02:20:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:51,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:51,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:51,293 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:51,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 02:20:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:51,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-30 02:20:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:20:51,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:51,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:51,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967778872] [2023-08-30 02:20:51,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967778872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:51,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:51,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:20:51,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249435813] [2023-08-30 02:20:51,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:51,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:20:51,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:20:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:20:51,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 342 [2023-08-30 02:20:51,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 820 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 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 02:20:51,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:51,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 342 [2023-08-30 02:20:51,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:51,951 INFO L130 PetriNetUnfolder]: 2567/4906 cut-off events. [2023-08-30 02:20:51,951 INFO L131 PetriNetUnfolder]: For 8199/8199 co-relation queries the response was YES. [2023-08-30 02:20:51,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 4906 events. 2567/4906 cut-off events. For 8199/8199 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 29718 event pairs, 1741 based on Foata normal form. 102/4954 useless extension candidates. Maximal degree in co-relation 16191. Up to 4025 conditions per place. [2023-08-30 02:20:51,977 INFO L137 encePairwiseOnDemand]: 338/342 looper letters, 146 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-30 02:20:51,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 157 transitions, 1508 flow [2023-08-30 02:20:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:20:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:20:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-30 02:20:51,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282651072124757 [2023-08-30 02:20:51,979 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-30 02:20:51,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-30 02:20:51,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:51,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-30 02:20:51,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 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 02:20:51,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:51,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 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 02:20:51,983 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 820 flow. Second operand 3 states and 542 transitions. [2023-08-30 02:20:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 157 transitions, 1508 flow [2023-08-30 02:20:52,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 157 transitions, 1482 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-30 02:20:52,018 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 815 flow [2023-08-30 02:20:52,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=815, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2023-08-30 02:20:52,019 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 68 predicate places. [2023-08-30 02:20:52,019 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 815 flow [2023-08-30 02:20:52,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 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 02:20:52,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:52,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:52,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 02:20:52,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:52,229 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:52,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1405982527, now seen corresponding path program 1 times [2023-08-30 02:20:52,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:52,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162513268] [2023-08-30 02:20:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:20:52,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:52,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:52,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:52,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 02:20:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:20:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 02:20:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:52,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 02:20:52,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 02:20:52,724 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 02:20:52,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:52,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:52,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162513268] [2023-08-30 02:20:52,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162513268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:52,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:52,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:20:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188434528] [2023-08-30 02:20:52,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:52,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 02:20:52,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 02:20:52,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-30 02:20:54,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 342 [2023-08-30 02:20:54,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 815 flow. Second operand has 15 states, 15 states have (on average 134.46666666666667) internal successors, (2017), 15 states have internal predecessors, (2017), 0 states have call successors, (0), 0 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 02:20:54,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:54,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 342 [2023-08-30 02:20:54,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:20:56,265 INFO L130 PetriNetUnfolder]: 3358/6298 cut-off events. [2023-08-30 02:20:56,265 INFO L131 PetriNetUnfolder]: For 9484/9484 co-relation queries the response was YES. [2023-08-30 02:20:56,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21674 conditions, 6298 events. 3358/6298 cut-off events. For 9484/9484 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 38975 event pairs, 1092 based on Foata normal form. 12/6310 useless extension candidates. Maximal degree in co-relation 21632. Up to 4791 conditions per place. [2023-08-30 02:20:56,300 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 235 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2023-08-30 02:20:56,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 282 transitions, 2252 flow [2023-08-30 02:20:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-30 02:20:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-30 02:20:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3256 transitions. [2023-08-30 02:20:56,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41393338418510045 [2023-08-30 02:20:56,309 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3256 transitions. [2023-08-30 02:20:56,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3256 transitions. [2023-08-30 02:20:56,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:20:56,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3256 transitions. [2023-08-30 02:20:56,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.56521739130434) internal successors, (3256), 23 states have internal predecessors, (3256), 0 states have call successors, (0), 0 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 02:20:56,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 342.0) internal successors, (8208), 24 states have internal predecessors, (8208), 0 states have call successors, (0), 0 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 02:20:56,327 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 342.0) internal successors, (8208), 24 states have internal predecessors, (8208), 0 states have call successors, (0), 0 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 02:20:56,327 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 815 flow. Second operand 23 states and 3256 transitions. [2023-08-30 02:20:56,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 282 transitions, 2252 flow [2023-08-30 02:20:56,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2233 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 02:20:56,443 INFO L231 Difference]: Finished difference. Result has 154 places, 148 transitions, 1364 flow [2023-08-30 02:20:56,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1364, PETRI_PLACES=154, PETRI_TRANSITIONS=148} [2023-08-30 02:20:56,444 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2023-08-30 02:20:56,444 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 148 transitions, 1364 flow [2023-08-30 02:20:56,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.46666666666667) internal successors, (2017), 15 states have internal predecessors, (2017), 0 states have call successors, (0), 0 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 02:20:56,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:20:56,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:20:56,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 02:20:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:56,656 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:20:56,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:20:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -206120617, now seen corresponding path program 2 times [2023-08-30 02:20:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:20:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974856613] [2023-08-30 02:20:56,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 02:20:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:20:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:20:56,659 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:20:56,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 02:20:56,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 02:20:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:20:56,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 02:20:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:20:56,808 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-30 02:20:56,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-30 02:20:56,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 02:20:57,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 02:20:57,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 02:20:57,322 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 02:20:57,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:20:57,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:20:57,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974856613] [2023-08-30 02:20:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974856613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:20:57,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:20:57,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:20:57,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127603565] [2023-08-30 02:20:57,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:20:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:20:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:20:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:20:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:20:58,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 342 [2023-08-30 02:20:58,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 148 transitions, 1364 flow. Second operand has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 02:20:58,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:20:58,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 342 [2023-08-30 02:20:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:00,699 INFO L130 PetriNetUnfolder]: 3953/7412 cut-off events. [2023-08-30 02:21:00,699 INFO L131 PetriNetUnfolder]: For 12534/12534 co-relation queries the response was YES. [2023-08-30 02:21:00,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26548 conditions, 7412 events. 3953/7412 cut-off events. For 12534/12534 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 46900 event pairs, 1427 based on Foata normal form. 6/7418 useless extension candidates. Maximal degree in co-relation 26490. Up to 5783 conditions per place. [2023-08-30 02:21:00,744 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 236 selfloop transitions, 43 changer transitions 0/279 dead transitions. [2023-08-30 02:21:00,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 279 transitions, 2648 flow [2023-08-30 02:21:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:21:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:21:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2106 transitions. [2023-08-30 02:21:00,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-08-30 02:21:00,749 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2106 transitions. [2023-08-30 02:21:00,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2106 transitions. [2023-08-30 02:21:00,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:00,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2106 transitions. [2023-08-30 02:21:00,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 140.4) internal successors, (2106), 15 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 02:21:00,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 342.0) internal successors, (5472), 16 states have internal predecessors, (5472), 0 states have call successors, (0), 0 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 02:21:00,759 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 342.0) internal successors, (5472), 16 states have internal predecessors, (5472), 0 states have call successors, (0), 0 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 02:21:00,759 INFO L175 Difference]: Start difference. First operand has 154 places, 148 transitions, 1364 flow. Second operand 15 states and 2106 transitions. [2023-08-30 02:21:00,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 279 transitions, 2648 flow [2023-08-30 02:21:00,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 279 transitions, 2636 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-30 02:21:00,832 INFO L231 Difference]: Finished difference. Result has 177 places, 175 transitions, 1809 flow [2023-08-30 02:21:00,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1809, PETRI_PLACES=177, PETRI_TRANSITIONS=175} [2023-08-30 02:21:00,832 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2023-08-30 02:21:00,832 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 175 transitions, 1809 flow [2023-08-30 02:21:00,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 02:21:00,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:00,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:00,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:01,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:01,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -329988519, now seen corresponding path program 3 times [2023-08-30 02:21:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:01,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329212819] [2023-08-30 02:21:01,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 02:21:01,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:01,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:01,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 02:21:01,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 02:21:01,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 02:21:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-30 02:21:01,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:01,168 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2023-08-30 02:21:01,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2023-08-30 02:21:01,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 02:21:01,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-30 02:21:01,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 02:21:01,705 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 02:21:01,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 02:21:01,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:21:01,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329212819] [2023-08-30 02:21:01,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329212819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:21:01,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:21:01,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:21:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630477455] [2023-08-30 02:21:01,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:21:01,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:21:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:21:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:21:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:21:03,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 342 [2023-08-30 02:21:03,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 175 transitions, 1809 flow. Second operand has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 02:21:03,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:03,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 342 [2023-08-30 02:21:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:05,802 INFO L130 PetriNetUnfolder]: 3941/7388 cut-off events. [2023-08-30 02:21:05,802 INFO L131 PetriNetUnfolder]: For 14687/14687 co-relation queries the response was YES. [2023-08-30 02:21:05,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27411 conditions, 7388 events. 3941/7388 cut-off events. For 14687/14687 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 46779 event pairs, 1109 based on Foata normal form. 12/7400 useless extension candidates. Maximal degree in co-relation 27343. Up to 3611 conditions per place. [2023-08-30 02:21:05,857 INFO L137 encePairwiseOnDemand]: 325/342 looper letters, 193 selfloop transitions, 105 changer transitions 0/298 dead transitions. [2023-08-30 02:21:05,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 298 transitions, 2930 flow [2023-08-30 02:21:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-30 02:21:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-30 02:21:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3037 transitions. [2023-08-30 02:21:05,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036416799574694 [2023-08-30 02:21:05,862 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3037 transitions. [2023-08-30 02:21:05,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3037 transitions. [2023-08-30 02:21:05,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:05,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3037 transitions. [2023-08-30 02:21:05,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 138.04545454545453) internal successors, (3037), 22 states have internal predecessors, (3037), 0 states have call successors, (0), 0 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 02:21:05,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 342.0) internal successors, (7866), 23 states have internal predecessors, (7866), 0 states have call successors, (0), 0 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 02:21:05,875 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 342.0) internal successors, (7866), 23 states have internal predecessors, (7866), 0 states have call successors, (0), 0 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 02:21:05,875 INFO L175 Difference]: Start difference. First operand has 177 places, 175 transitions, 1809 flow. Second operand 22 states and 3037 transitions. [2023-08-30 02:21:05,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 298 transitions, 2930 flow [2023-08-30 02:21:05,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 298 transitions, 2911 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 02:21:05,953 INFO L231 Difference]: Finished difference. Result has 199 places, 186 transitions, 2146 flow [2023-08-30 02:21:05,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2146, PETRI_PLACES=199, PETRI_TRANSITIONS=186} [2023-08-30 02:21:05,954 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-08-30 02:21:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 186 transitions, 2146 flow [2023-08-30 02:21:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 131.375) internal successors, (2102), 16 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 02:21:05,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:05,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:05,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-08-30 02:21:06,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:06,162 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:06,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash 841701875, now seen corresponding path program 1 times [2023-08-30 02:21:06,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:06,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856265213] [2023-08-30 02:21:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:06,164 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 02:21:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:21:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:21:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:21:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:21:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:21:06,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 02:21:06,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856265213] [2023-08-30 02:21:06,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856265213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:21:06,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 02:21:06,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-30 02:21:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879732855] [2023-08-30 02:21:06,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 02:21:06,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:21:06,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 02:21:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:21:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:21:06,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 342 [2023-08-30 02:21:06,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 186 transitions, 2146 flow. Second operand has 6 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 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 02:21:06,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:21:06,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 342 [2023-08-30 02:21:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:21:08,659 INFO L130 PetriNetUnfolder]: 7109/13924 cut-off events. [2023-08-30 02:21:08,659 INFO L131 PetriNetUnfolder]: For 36315/36319 co-relation queries the response was YES. [2023-08-30 02:21:08,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53946 conditions, 13924 events. 7109/13924 cut-off events. For 36315/36319 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 106504 event pairs, 2163 based on Foata normal form. 1756/15679 useless extension candidates. Maximal degree in co-relation 53873. Up to 3768 conditions per place. [2023-08-30 02:21:08,759 INFO L137 encePairwiseOnDemand]: 337/342 looper letters, 518 selfloop transitions, 22 changer transitions 0/551 dead transitions. [2023-08-30 02:21:08,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 551 transitions, 7226 flow [2023-08-30 02:21:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:21:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:21:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1087 transitions. [2023-08-30 02:21:08,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297270955165692 [2023-08-30 02:21:08,763 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1087 transitions. [2023-08-30 02:21:08,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1087 transitions. [2023-08-30 02:21:08,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:21:08,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1087 transitions. [2023-08-30 02:21:08,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.16666666666666) internal successors, (1087), 6 states have internal predecessors, (1087), 0 states have call successors, (0), 0 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 02:21:08,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 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 02:21:08,767 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 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 02:21:08,767 INFO L175 Difference]: Start difference. First operand has 199 places, 186 transitions, 2146 flow. Second operand 6 states and 1087 transitions. [2023-08-30 02:21:08,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 551 transitions, 7226 flow [2023-08-30 02:21:08,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 551 transitions, 6687 flow, removed 58 selfloop flow, removed 16 redundant places. [2023-08-30 02:21:08,987 INFO L231 Difference]: Finished difference. Result has 192 places, 197 transitions, 2161 flow [2023-08-30 02:21:08,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2161, PETRI_PLACES=192, PETRI_TRANSITIONS=197} [2023-08-30 02:21:08,988 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2023-08-30 02:21:08,988 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 197 transitions, 2161 flow [2023-08-30 02:21:08,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.83333333333334) internal successors, (977), 6 states have internal predecessors, (977), 0 states have call successors, (0), 0 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 02:21:08,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:21:08,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:08,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:09,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:09,194 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-30 02:21:09,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:21:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash -34660884, now seen corresponding path program 1 times [2023-08-30 02:21:09,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 02:21:09,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185030254] [2023-08-30 02:21:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:21:09,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 02:21:09,196 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 02:21:09,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 02:21:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:21:09,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 02:21:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 02:21:09,404 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-08-30 02:21:09,404 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 02:21:09,405 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-08-30 02:21:09,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-30 02:21:09,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-30 02:21:09,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-30 02:21:09,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-30 02:21:09,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-30 02:21:09,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-30 02:21:09,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-30 02:21:09,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-30 02:21:09,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-08-30 02:21:09,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-08-30 02:21:09,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-08-30 02:21:09,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-30 02:21:09,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-30 02:21:09,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-08-30 02:21:09,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2023-08-30 02:21:09,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-30 02:21:09,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-30 02:21:09,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-30 02:21:09,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-30 02:21:09,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-08-30 02:21:09,410 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-30 02:21:09,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-30 02:21:09,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 02:21:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 02:21:09,622 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:21:09,627 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 02:21:09,628 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 02:21:09,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 02:21:09 BasicIcfg [2023-08-30 02:21:09,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 02:21:09,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 02:21:09,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 02:21:09,690 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 02:21:09,690 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:20:18" (3/4) ... [2023-08-30 02:21:09,692 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-08-30 02:21:09,693 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 02:21:09,693 INFO L158 Benchmark]: Toolchain (without parser) took 52574.91ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 57.8MB in the beginning and 809.8MB in the end (delta: -752.1MB). Peak memory consumption was 821.7MB. Max. memory is 16.1GB. [2023-08-30 02:21:09,693 INFO L158 Benchmark]: CDTParser took 1.54ms. Allocated memory is still 62.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:21:09,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 647.74ms. Allocated memory is still 81.8MB. Free memory was 57.6MB in the beginning and 50.0MB in the end (delta: 7.5MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. [2023-08-30 02:21:09,694 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.52ms. Allocated memory is still 81.8MB. Free memory was 50.0MB in the beginning and 47.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:21:09,694 INFO L158 Benchmark]: Boogie Preprocessor took 55.88ms. Allocated memory is still 81.8MB. Free memory was 47.3MB in the beginning and 45.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 02:21:09,694 INFO L158 Benchmark]: RCFGBuilder took 633.02ms. Allocated memory is still 81.8MB. Free memory was 45.2MB in the beginning and 50.5MB in the end (delta: -5.3MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2023-08-30 02:21:09,695 INFO L158 Benchmark]: TraceAbstraction took 51168.48ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 49.7MB in the beginning and 810.9MB in the end (delta: -761.2MB). Peak memory consumption was 810.9MB. Max. memory is 16.1GB. [2023-08-30 02:21:09,695 INFO L158 Benchmark]: Witness Printer took 2.81ms. Allocated memory is still 1.7GB. Free memory was 810.9MB in the beginning and 809.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 02:21:09,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.54ms. Allocated memory is still 62.9MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 647.74ms. Allocated memory is still 81.8MB. Free memory was 57.6MB in the beginning and 50.0MB in the end (delta: 7.5MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.52ms. Allocated memory is still 81.8MB. Free memory was 50.0MB in the beginning and 47.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.88ms. Allocated memory is still 81.8MB. Free memory was 47.3MB in the beginning and 45.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 633.02ms. Allocated memory is still 81.8MB. Free memory was 45.2MB in the beginning and 50.5MB in the end (delta: -5.3MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * TraceAbstraction took 51168.48ms. Allocated memory was 81.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 49.7MB in the beginning and 810.9MB in the end (delta: -761.2MB). Peak memory consumption was 810.9MB. Max. memory is 16.1GB. * Witness Printer took 2.81ms. Allocated memory is still 1.7GB. Free memory was 810.9MB in the beginning and 809.8MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.2s, 165 PlacesBefore, 49 PlacesAfterwards, 168 TransitionsBefore, 47 TransitionsAfterwards, 8060 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 168 TotalNumberOfCompositions, 12825 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8572, independent: 8355, independent conditional: 0, independent unconditional: 8355, dependent: 217, dependent conditional: 0, dependent unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4552, independent: 4498, independent conditional: 0, independent unconditional: 4498, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8572, independent: 3857, independent conditional: 0, independent unconditional: 3857, dependent: 163, dependent conditional: 0, dependent unconditional: 163, unknown: 4552, unknown conditional: 0, unknown unconditional: 4552] , Statistics on independence cache: Total cache size (in pairs): 279, Positive cache size: 258, Positive conditional cache size: 0, Positive unconditional cache size: 258, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 265 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 50.9s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 31.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5379 SdHoareTripleChecker+Valid, 19.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4560 mSDsluCounter, 6156 SdHoareTripleChecker+Invalid, 16.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6069 mSDsCounter, 177 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21308 IncrementalHoareTripleChecker+Invalid, 21485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 177 mSolverCounterUnsat, 87 mSDtfsCounter, 21308 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2161occurred in iteration=21, InterpolantAutomatonStates: 160, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 291 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 293 ConstructedInterpolants, 10 QuantifiedInterpolants, 2414 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2088 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-08-30 02:21:09,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample