./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c -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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:26:25,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:26:25,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:26:25,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:26:25,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:26:25,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:26:25,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:26:25,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:26:25,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:26:25,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:26:25,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:26:25,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:26:25,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:26:25,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:26:25,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:26:25,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:26:25,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:26:25,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:26:25,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:26:25,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:26:25,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:26:25,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:26:25,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:26:25,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:26:25,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:26:25,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:26:25,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:26:25,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:26:25,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:26:25,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:26:25,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:26:25,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:26:25,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:26:25,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:26:25,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:26:25,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:26:25,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:26:25,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:26:25,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:26:25,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:26:25,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:26:25,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:26:25,636 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:26:25,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:26:25,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:26:25,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:26:25,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:26:25,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:26:25,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:26:25,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:26:25,640 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:26:25,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:26:25,641 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:26:25,641 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:26:25,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:26:25,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:26:25,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:26:25,642 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:26:25,642 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:26:25,642 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:26:25,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:26:25,642 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:26:25,643 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:26:25,643 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:26:25,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:26:25,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:26:25,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:26:25,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:26:25,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:26:25,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:26:25,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:26:25,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:26:25,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:26:25,645 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:26:25,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:26:25,645 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:26:25,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:26:25,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:26:25,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:26:26,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:26:26,003 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:26:26,003 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:26:26,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-29 23:26:27,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:26:27,433 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:26:27,433 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-29 23:26:27,442 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c41b2574/2e94ace4115644d1923508f3b1a8e5ba/FLAG6e84ec4df [2023-08-29 23:26:27,452 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c41b2574/2e94ace4115644d1923508f3b1a8e5ba [2023-08-29 23:26:27,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:26:27,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:26:27,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:26:27,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:26:27,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:26:27,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6dcdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27, skipping insertion in model container [2023-08-29 23:26:27,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:26:27,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:26:27,594 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2554,2567] [2023-08-29 23:26:27,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:26:27,606 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:26:27,623 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c[2554,2567] [2023-08-29 23:26:27,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:26:27,630 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:26:27,631 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:26:27,636 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:26:27,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27 WrapperNode [2023-08-29 23:26:27,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:26:27,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:26:27,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:26:27,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:26:27,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,674 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-29 23:26:27,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:26:27,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:26:27,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:26:27,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:26:27,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,715 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:26:27,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:26:27,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:26:27,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:26:27,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (1/1) ... [2023-08-29 23:26:27,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:26:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:27,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:26:27,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:26:27,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:26:27,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:26:27,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:26:27,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:26:27,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:26:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:26:27,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:26:27,845 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:26:27,924 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:26:27,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:26:28,203 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:26:28,225 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:26:28,225 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 23:26:28,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:26:28 BoogieIcfgContainer [2023-08-29 23:26:28,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:26:28,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:26:28,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:26:28,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:26:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:26:27" (1/3) ... [2023-08-29 23:26:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db28177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:26:28, skipping insertion in model container [2023-08-29 23:26:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:27" (2/3) ... [2023-08-29 23:26:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db28177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:26:28, skipping insertion in model container [2023-08-29 23:26:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:26:28" (3/3) ... [2023-08-29 23:26:28,255 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-08-29 23:26:28,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:26:28,273 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-29 23:26:28,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:26:28,367 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 23:26:28,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 115 transitions, 246 flow [2023-08-29 23:26:28,453 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2023-08-29 23:26:28,453 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:28,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 8/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 99 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-08-29 23:26:28,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 115 transitions, 246 flow [2023-08-29 23:26:28,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 109 transitions, 230 flow [2023-08-29 23:26:28,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:26:28,473 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 109 transitions, 230 flow [2023-08-29 23:26:28,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 109 transitions, 230 flow [2023-08-29 23:26:28,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 230 flow [2023-08-29 23:26:28,501 INFO L130 PetriNetUnfolder]: 8/109 cut-off events. [2023-08-29 23:26:28,502 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:28,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 8/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-08-29 23:26:28,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-29 23:26:31,730 INFO L134 LiptonReduction]: Checked pairs total: 1185 [2023-08-29 23:26:31,731 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-29 23:26:31,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:26:31,749 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;@45c47825, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:26:31,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-29 23:26:31,751 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:26:31,751 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:26:31,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:31,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:26:31,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:31,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash 447, now seen corresponding path program 1 times [2023-08-29 23:26:31,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:31,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465451391] [2023-08-29 23:26:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:31,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465451391] [2023-08-29 23:26:31,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465451391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:31,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:31,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:26:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283265604] [2023-08-29 23:26:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:26:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:26:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:26:31,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 233 [2023-08-29 23:26:31,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:31,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:31,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 233 [2023-08-29 23:26:31,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:31,948 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-08-29 23:26:31,948 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-29 23:26:31,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 45/80 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 144 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 124. Up to 81 conditions per place. [2023-08-29 23:26:31,952 INFO L137 encePairwiseOnDemand]: 230/233 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-29 23:26:31,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 88 flow [2023-08-29 23:26:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:26:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:26:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2023-08-29 23:26:31,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49356223175965663 [2023-08-29 23:26:31,968 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2023-08-29 23:26:31,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2023-08-29 23:26:31,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:31,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2023-08-29 23:26:31,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:31,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:31,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:31,984 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 2 states and 230 transitions. [2023-08-29 23:26:31,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 88 flow [2023-08-29 23:26:31,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 23:26:31,988 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 42 flow [2023-08-29 23:26:31,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-08-29 23:26:31,995 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-29 23:26:31,995 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 42 flow [2023-08-29 23:26:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:31,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:31,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:26:31,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:26:31,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:31,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 438197, now seen corresponding path program 1 times [2023-08-29 23:26:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469236617] [2023-08-29 23:26:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:32,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:32,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469236617] [2023-08-29 23:26:32,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469236617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:32,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:32,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:32,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190549305] [2023-08-29 23:26:32,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:32,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:32,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:32,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:32,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:32,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 233 [2023-08-29 23:26:32,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:32,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 233 [2023-08-29 23:26:32,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:32,226 INFO L130 PetriNetUnfolder]: 41/72 cut-off events. [2023-08-29 23:26:32,226 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:26:32,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 72 events. 41/72 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 121 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 147. Up to 72 conditions per place. [2023-08-29 23:26:32,227 INFO L137 encePairwiseOnDemand]: 230/233 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 23:26:32,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 72 flow [2023-08-29 23:26:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-29 23:26:32,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43490701001430615 [2023-08-29 23:26:32,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-29 23:26:32,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-29 23:26:32,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:32,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-29 23:26:32,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,234 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 42 flow. Second operand 3 states and 304 transitions. [2023-08-29 23:26:32,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 72 flow [2023-08-29 23:26:32,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:26:32,235 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 40 flow [2023-08-29 23:26:32,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-29 23:26:32,236 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-29 23:26:32,236 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 40 flow [2023-08-29 23:26:32,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:32,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:26:32,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:26:32,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:32,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:32,238 INFO L85 PathProgramCache]: Analyzing trace with hash 438196, now seen corresponding path program 1 times [2023-08-29 23:26:32,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724514079] [2023-08-29 23:26:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:32,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:32,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724514079] [2023-08-29 23:26:32,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724514079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:32,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:32,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908645977] [2023-08-29 23:26:32,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:32,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:32,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:32,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 233 [2023-08-29 23:26:32,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:32,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 233 [2023-08-29 23:26:32,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:32,459 INFO L130 PetriNetUnfolder]: 37/64 cut-off events. [2023-08-29 23:26:32,459 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:26:32,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 64 events. 37/64 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 104 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 132. Up to 64 conditions per place. [2023-08-29 23:26:32,460 INFO L137 encePairwiseOnDemand]: 230/233 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-29 23:26:32,460 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-29 23:26:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-29 23:26:32,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492131616595136 [2023-08-29 23:26:32,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-29 23:26:32,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-29 23:26:32,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:32,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-29 23:26:32,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,467 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 314 transitions. [2023-08-29 23:26:32,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-29 23:26:32,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:32,468 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 37 flow [2023-08-29 23:26:32,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-08-29 23:26:32,469 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-29 23:26:32,469 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 37 flow [2023-08-29 23:26:32,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:32,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:26:32,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:26:32,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:32,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 421114915, now seen corresponding path program 1 times [2023-08-29 23:26:32,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:32,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755749150] [2023-08-29 23:26:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:32,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755749150] [2023-08-29 23:26:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755749150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:32,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:32,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:32,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275402474] [2023-08-29 23:26:32,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:32,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:32,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 233 [2023-08-29 23:26:32,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 37 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:32,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 233 [2023-08-29 23:26:32,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:32,658 INFO L130 PetriNetUnfolder]: 29/52 cut-off events. [2023-08-29 23:26:32,658 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:26:32,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 52 events. 29/52 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 74 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2023-08-29 23:26:32,660 INFO L137 encePairwiseOnDemand]: 231/233 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-29 23:26:32,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 63 flow [2023-08-29 23:26:32,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-08-29 23:26:32,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44635193133047213 [2023-08-29 23:26:32,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-08-29 23:26:32,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-08-29 23:26:32,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:32,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-08-29 23:26:32,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,671 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 37 flow. Second operand 3 states and 312 transitions. [2023-08-29 23:26:32,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 63 flow [2023-08-29 23:26:32,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:32,672 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-29 23:26:32,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-29 23:26:32,674 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-29 23:26:32,674 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-29 23:26:32,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:32,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:26:32,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:26:32,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:32,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash 421114914, now seen corresponding path program 1 times [2023-08-29 23:26:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392224381] [2023-08-29 23:26:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:32,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392224381] [2023-08-29 23:26:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392224381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:32,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:26:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979731558] [2023-08-29 23:26:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:32,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:26:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:26:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:26:32,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 233 [2023-08-29 23:26:32,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:32,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 233 [2023-08-29 23:26:32,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:32,908 INFO L130 PetriNetUnfolder]: 21/40 cut-off events. [2023-08-29 23:26:32,908 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:26:32,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 21/40 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 86. Up to 40 conditions per place. [2023-08-29 23:26:32,909 INFO L137 encePairwiseOnDemand]: 231/233 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-29 23:26:32,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 60 flow [2023-08-29 23:26:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-29 23:26:32,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105865522174535 [2023-08-29 23:26:32,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-29 23:26:32,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-29 23:26:32,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:32,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-29 23:26:32,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,915 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 3 states and 287 transitions. [2023-08-29 23:26:32,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 60 flow [2023-08-29 23:26:32,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:32,915 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 35 flow [2023-08-29 23:26:32,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-29 23:26:32,917 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -7 predicate places. [2023-08-29 23:26:32,918 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 35 flow [2023-08-29 23:26:32,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:32,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:32,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:26:32,919 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:32,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1317464909, now seen corresponding path program 1 times [2023-08-29 23:26:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:32,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792402203] [2023-08-29 23:26:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:33,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:33,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792402203] [2023-08-29 23:26:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792402203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:33,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891482342] [2023-08-29 23:26:33,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:33,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:33,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 233 [2023-08-29 23:26:33,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:33,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 233 [2023-08-29 23:26:33,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:33,141 INFO L130 PetriNetUnfolder]: 41/77 cut-off events. [2023-08-29 23:26:33,141 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 23:26:33,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 77 events. 41/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 165 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 163. Up to 51 conditions per place. [2023-08-29 23:26:33,142 INFO L137 encePairwiseOnDemand]: 229/233 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-08-29 23:26:33,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 104 flow [2023-08-29 23:26:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-29 23:26:33,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463519313304721 [2023-08-29 23:26:33,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-29 23:26:33,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-29 23:26:33,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:33,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-29 23:26:33,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 233.0) internal successors, (932), 4 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,147 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 35 flow. Second operand 3 states and 324 transitions. [2023-08-29 23:26:33,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 104 flow [2023-08-29 23:26:33,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:33,148 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 53 flow [2023-08-29 23:26:33,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-29 23:26:33,149 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-29 23:26:33,149 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 53 flow [2023-08-29 23:26:33,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:33,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:33,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:26:33,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:33,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1639768176, now seen corresponding path program 1 times [2023-08-29 23:26:33,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:33,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186244733] [2023-08-29 23:26:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:33,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:33,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:33,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186244733] [2023-08-29 23:26:33,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186244733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:33,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:33,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:26:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123593944] [2023-08-29 23:26:33,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:26:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:26:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:26:33,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-29 23:26:33,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 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) [2023-08-29 23:26:33,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:33,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-29 23:26:33,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:33,374 INFO L130 PetriNetUnfolder]: 53/103 cut-off events. [2023-08-29 23:26:33,375 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2023-08-29 23:26:33,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 103 events. 53/103 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 257 event pairs, 7 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 258. Up to 57 conditions per place. [2023-08-29 23:26:33,377 INFO L137 encePairwiseOnDemand]: 228/233 looper letters, 27 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-08-29 23:26:33,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 175 flow [2023-08-29 23:26:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:26:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:26:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 492 transitions. [2023-08-29 23:26:33,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223175965665236 [2023-08-29 23:26:33,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 492 transitions. [2023-08-29 23:26:33,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 492 transitions. [2023-08-29 23:26:33,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:33,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 492 transitions. [2023-08-29 23:26:33,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.4) internal successors, (492), 5 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,383 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:33,383 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 53 flow. Second operand 5 states and 492 transitions. [2023-08-29 23:26:33,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 175 flow [2023-08-29 23:26:33,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:33,385 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 106 flow [2023-08-29 23:26:33,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-29 23:26:33,386 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-29 23:26:33,386 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 106 flow [2023-08-29 23:26:33,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 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) [2023-08-29 23:26:33,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:33,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:26:33,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:33,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:33,388 INFO L85 PathProgramCache]: Analyzing trace with hash -331430452, now seen corresponding path program 2 times [2023-08-29 23:26:33,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:33,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593535869] [2023-08-29 23:26:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:33,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593535869] [2023-08-29 23:26:33,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593535869] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022831985] [2023-08-29 23:26:33,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:26:33,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:33,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:33,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:33,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 23:26:33,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:26:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:26:33,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:33,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:34,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022831985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:34,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:34,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-29 23:26:34,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326564555] [2023-08-29 23:26:34,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:34,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 23:26:34,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 23:26:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-29 23:26:34,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 233 [2023-08-29 23:26:34,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 92.42857142857143) internal successors, (647), 7 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:34,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 233 [2023-08-29 23:26:34,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:34,430 INFO L130 PetriNetUnfolder]: 69/133 cut-off events. [2023-08-29 23:26:34,430 INFO L131 PetriNetUnfolder]: For 143/143 co-relation queries the response was YES. [2023-08-29 23:26:34,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 133 events. 69/133 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 11 based on Foata normal form. 18/151 useless extension candidates. Maximal degree in co-relation 453. Up to 59 conditions per place. [2023-08-29 23:26:34,431 INFO L137 encePairwiseOnDemand]: 228/233 looper letters, 32 selfloop transitions, 11 changer transitions 4/47 dead transitions. [2023-08-29 23:26:34,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 306 flow [2023-08-29 23:26:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 23:26:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 23:26:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2023-08-29 23:26:34,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413447782546495 [2023-08-29 23:26:34,434 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2023-08-29 23:26:34,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2023-08-29 23:26:34,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:34,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2023-08-29 23:26:34,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,439 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 233.0) internal successors, (1631), 7 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,439 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 106 flow. Second operand 6 states and 578 transitions. [2023-08-29 23:26:34,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 306 flow [2023-08-29 23:26:34,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:26:34,442 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 189 flow [2023-08-29 23:26:34,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-29 23:26:34,444 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-08-29 23:26:34,444 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 189 flow [2023-08-29 23:26:34,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.42857142857143) internal successors, (647), 7 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:34,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:34,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:34,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:34,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:34,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1632126019, now seen corresponding path program 1 times [2023-08-29 23:26:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:34,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576823720] [2023-08-29 23:26:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:34,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:34,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:34,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576823720] [2023-08-29 23:26:34,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576823720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:34,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:26:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422795417] [2023-08-29 23:26:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:34,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:26:34,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:26:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:26:34,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-29 23:26:34,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:34,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-29 23:26:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:34,889 INFO L130 PetriNetUnfolder]: 78/160 cut-off events. [2023-08-29 23:26:34,889 INFO L131 PetriNetUnfolder]: For 522/522 co-relation queries the response was YES. [2023-08-29 23:26:34,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 160 events. 78/160 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 514 event pairs, 10 based on Foata normal form. 12/172 useless extension candidates. Maximal degree in co-relation 689. Up to 80 conditions per place. [2023-08-29 23:26:34,891 INFO L137 encePairwiseOnDemand]: 228/233 looper letters, 38 selfloop transitions, 8 changer transitions 4/50 dead transitions. [2023-08-29 23:26:34,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 424 flow [2023-08-29 23:26:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:26:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:26:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 496 transitions. [2023-08-29 23:26:34,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257510729613734 [2023-08-29 23:26:34,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 496 transitions. [2023-08-29 23:26:34,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 496 transitions. [2023-08-29 23:26:34,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:34,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 496 transitions. [2023-08-29 23:26:34,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.2) internal successors, (496), 5 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,898 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 233.0) internal successors, (1398), 6 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,898 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 189 flow. Second operand 5 states and 496 transitions. [2023-08-29 23:26:34,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 424 flow [2023-08-29 23:26:34,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 375 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-08-29 23:26:34,902 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 240 flow [2023-08-29 23:26:34,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-29 23:26:34,903 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2023-08-29 23:26:34,903 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 240 flow [2023-08-29 23:26:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:34,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:34,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:34,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:26:34,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:34,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash 851407313, now seen corresponding path program 2 times [2023-08-29 23:26:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:34,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308113141] [2023-08-29 23:26:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308113141] [2023-08-29 23:26:35,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308113141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:26:35,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782584151] [2023-08-29 23:26:35,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:26:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:26:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:26:35,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 233 [2023-08-29 23:26:35,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 233 [2023-08-29 23:26:35,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,098 INFO L130 PetriNetUnfolder]: 67/132 cut-off events. [2023-08-29 23:26:35,098 INFO L131 PetriNetUnfolder]: For 494/494 co-relation queries the response was YES. [2023-08-29 23:26:35,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 132 events. 67/132 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 344 event pairs, 10 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 598. Up to 117 conditions per place. [2023-08-29 23:26:35,100 INFO L137 encePairwiseOnDemand]: 229/233 looper letters, 29 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-29 23:26:35,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 319 flow [2023-08-29 23:26:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:26:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:26:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-08-29 23:26:35,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366952789699571 [2023-08-29 23:26:35,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-08-29 23:26:35,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-08-29 23:26:35,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-08-29 23:26:35,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 233.0) internal successors, (1165), 5 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,106 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 240 flow. Second operand 4 states and 407 transitions. [2023-08-29 23:26:35,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 319 flow [2023-08-29 23:26:35,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 35 transitions, 311 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-29 23:26:35,109 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 239 flow [2023-08-29 23:26:35,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-08-29 23:26:35,110 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2023-08-29 23:26:35,110 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 239 flow [2023-08-29 23:26:35,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:35,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:35,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:26:35,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:35,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1443212748, now seen corresponding path program 1 times [2023-08-29 23:26:35,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:35,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34469210] [2023-08-29 23:26:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:26:35,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34469210] [2023-08-29 23:26:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34469210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16411022] [2023-08-29 23:26:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:35,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:35,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 23:26:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-29 23:26:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:26:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-29 23:26:35,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16411022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:35,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:35,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-29 23:26:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922368905] [2023-08-29 23:26:35,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:26:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:26:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:26:35,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 233 [2023-08-29 23:26:35,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 239 flow. Second operand has 8 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 233 [2023-08-29 23:26:35,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,973 INFO L130 PetriNetUnfolder]: 155/302 cut-off events. [2023-08-29 23:26:35,974 INFO L131 PetriNetUnfolder]: For 1103/1103 co-relation queries the response was YES. [2023-08-29 23:26:35,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 302 events. 155/302 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1098 event pairs, 20 based on Foata normal form. 28/330 useless extension candidates. Maximal degree in co-relation 1432. Up to 127 conditions per place. [2023-08-29 23:26:35,977 INFO L137 encePairwiseOnDemand]: 229/233 looper letters, 63 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2023-08-29 23:26:35,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 728 flow [2023-08-29 23:26:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:26:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:26:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 691 transitions. [2023-08-29 23:26:35,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42366646229307175 [2023-08-29 23:26:35,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 691 transitions. [2023-08-29 23:26:35,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 691 transitions. [2023-08-29 23:26:35,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 691 transitions. [2023-08-29 23:26:35,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 233.0) internal successors, (1864), 8 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,992 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 233.0) internal successors, (1864), 8 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,992 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 239 flow. Second operand 7 states and 691 transitions. [2023-08-29 23:26:35,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 728 flow [2023-08-29 23:26:35,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 687 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-29 23:26:35,998 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 355 flow [2023-08-29 23:26:35,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=355, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-29 23:26:35,999 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2023-08-29 23:26:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 355 flow [2023-08-29 23:26:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:36,206 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,SelfDestructingSolverStorable10 [2023-08-29 23:26:36,206 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:36,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash 206269085, now seen corresponding path program 2 times [2023-08-29 23:26:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:36,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054046880] [2023-08-29 23:26:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:26:37,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054046880] [2023-08-29 23:26:37,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054046880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:37,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189689645] [2023-08-29 23:26:37,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:26:37,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:37,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:37,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:37,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 23:26:37,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:26:37,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:26:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189689645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:38,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:38,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-08-29 23:26:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067634680] [2023-08-29 23:26:38,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:26:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:26:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:26:38,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 233 [2023-08-29 23:26:38,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 355 flow. Second operand has 13 states, 13 states have (on average 84.6923076923077) internal successors, (1101), 13 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:38,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:38,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 233 [2023-08-29 23:26:38,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:39,758 INFO L130 PetriNetUnfolder]: 311/626 cut-off events. [2023-08-29 23:26:39,758 INFO L131 PetriNetUnfolder]: For 2918/2918 co-relation queries the response was YES. [2023-08-29 23:26:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 626 events. 311/626 cut-off events. For 2918/2918 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3061 event pairs, 4 based on Foata normal form. 6/632 useless extension candidates. Maximal degree in co-relation 3136. Up to 261 conditions per place. [2023-08-29 23:26:39,764 INFO L137 encePairwiseOnDemand]: 227/233 looper letters, 76 selfloop transitions, 66 changer transitions 3/145 dead transitions. [2023-08-29 23:26:39,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 145 transitions, 1483 flow [2023-08-29 23:26:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 23:26:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 23:26:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1324 transitions. [2023-08-29 23:26:39,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37882689556509297 [2023-08-29 23:26:39,769 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1324 transitions. [2023-08-29 23:26:39,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1324 transitions. [2023-08-29 23:26:39,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:39,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1324 transitions. [2023-08-29 23:26:39,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 88.26666666666667) internal successors, (1324), 15 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:39,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 233.0) internal successors, (3728), 16 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:39,778 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 233.0) internal successors, (3728), 16 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:39,778 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 355 flow. Second operand 15 states and 1324 transitions. [2023-08-29 23:26:39,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 145 transitions, 1483 flow [2023-08-29 23:26:39,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 145 transitions, 1404 flow, removed 35 selfloop flow, removed 2 redundant places. [2023-08-29 23:26:39,787 INFO L231 Difference]: Finished difference. Result has 68 places, 93 transitions, 1188 flow [2023-08-29 23:26:39,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1188, PETRI_PLACES=68, PETRI_TRANSITIONS=93} [2023-08-29 23:26:39,788 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2023-08-29 23:26:39,788 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 93 transitions, 1188 flow [2023-08-29 23:26:39,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 84.6923076923077) internal successors, (1101), 13 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:39,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:39,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:39,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:39,995 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:39,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1028163609, now seen corresponding path program 3 times [2023-08-29 23:26:39,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92731654] [2023-08-29 23:26:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:39,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:40,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92731654] [2023-08-29 23:26:40,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92731654] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390251339] [2023-08-29 23:26:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:26:40,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:40,845 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) [2023-08-29 23:26:40,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 23:26:40,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:26:40,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:40,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:26:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:41,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390251339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:42,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:42,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-29 23:26:42,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115397513] [2023-08-29 23:26:42,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:42,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 23:26:42,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 23:26:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-29 23:26:43,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 233 [2023-08-29 23:26:43,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 93 transitions, 1188 flow. Second operand has 14 states, 14 states have (on average 86.35714285714286) internal successors, (1209), 14 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:43,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:43,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 233 [2023-08-29 23:26:43,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:44,950 INFO L130 PetriNetUnfolder]: 454/931 cut-off events. [2023-08-29 23:26:44,950 INFO L131 PetriNetUnfolder]: For 6532/6532 co-relation queries the response was YES. [2023-08-29 23:26:44,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5479 conditions, 931 events. 454/931 cut-off events. For 6532/6532 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5088 event pairs, 26 based on Foata normal form. 6/937 useless extension candidates. Maximal degree in co-relation 5455. Up to 383 conditions per place. [2023-08-29 23:26:44,961 INFO L137 encePairwiseOnDemand]: 227/233 looper letters, 59 selfloop transitions, 130 changer transitions 5/194 dead transitions. [2023-08-29 23:26:44,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 194 transitions, 2523 flow [2023-08-29 23:26:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-29 23:26:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-29 23:26:44,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1606 transitions. [2023-08-29 23:26:44,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829279923700525 [2023-08-29 23:26:44,967 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1606 transitions. [2023-08-29 23:26:44,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1606 transitions. [2023-08-29 23:26:44,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:44,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1606 transitions. [2023-08-29 23:26:44,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 89.22222222222223) internal successors, (1606), 18 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:44,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 233.0) internal successors, (4427), 19 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:44,977 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 233.0) internal successors, (4427), 19 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:44,978 INFO L175 Difference]: Start difference. First operand has 68 places, 93 transitions, 1188 flow. Second operand 18 states and 1606 transitions. [2023-08-29 23:26:44,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 194 transitions, 2523 flow [2023-08-29 23:26:45,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 194 transitions, 2224 flow, removed 148 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:45,007 INFO L231 Difference]: Finished difference. Result has 89 places, 143 transitions, 1990 flow [2023-08-29 23:26:45,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1990, PETRI_PLACES=89, PETRI_TRANSITIONS=143} [2023-08-29 23:26:45,009 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2023-08-29 23:26:45,009 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 143 transitions, 1990 flow [2023-08-29 23:26:45,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 86.35714285714286) internal successors, (1209), 14 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:45,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:45,010 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:45,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:45,220 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:26:45,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:45,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2066228280, now seen corresponding path program 4 times [2023-08-29 23:26:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844100903] [2023-08-29 23:26:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:45,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:45,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844100903] [2023-08-29 23:26:45,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844100903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:45,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951069512] [2023-08-29 23:26:45,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:26:45,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:45,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:45,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:45,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 23:26:45,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:26:45,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:26:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:45,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:46,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951069512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:46,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:46,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-29 23:26:46,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689459071] [2023-08-29 23:26:46,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:46,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 23:26:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 23:26:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-08-29 23:26:46,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 233 [2023-08-29 23:26:46,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 143 transitions, 1990 flow. Second operand has 18 states, 18 states have (on average 91.44444444444444) internal successors, (1646), 18 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:46,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:46,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 233 [2023-08-29 23:26:46,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:00,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-29 23:27:03,482 INFO L130 PetriNetUnfolder]: 1798/3455 cut-off events. [2023-08-29 23:27:03,483 INFO L131 PetriNetUnfolder]: For 29041/29041 co-relation queries the response was YES. [2023-08-29 23:27:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21395 conditions, 3455 events. 1798/3455 cut-off events. For 29041/29041 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22378 event pairs, 12 based on Foata normal form. 728/4183 useless extension candidates. Maximal degree in co-relation 21365. Up to 1047 conditions per place. [2023-08-29 23:27:03,521 INFO L137 encePairwiseOnDemand]: 228/233 looper letters, 444 selfloop transitions, 352 changer transitions 82/878 dead transitions. [2023-08-29 23:27:03,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 878 transitions, 12902 flow [2023-08-29 23:27:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-29 23:27:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-29 23:27:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5877 transitions. [2023-08-29 23:27:03,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068254188010522 [2023-08-29 23:27:03,534 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5877 transitions. [2023-08-29 23:27:03,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5877 transitions. [2023-08-29 23:27:03,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:03,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5877 transitions. [2023-08-29 23:27:03,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 94.79032258064517) internal successors, (5877), 62 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:03,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 233.0) internal successors, (14679), 63 states have internal predecessors, (14679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:03,573 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 233.0) internal successors, (14679), 63 states have internal predecessors, (14679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:03,573 INFO L175 Difference]: Start difference. First operand has 89 places, 143 transitions, 1990 flow. Second operand 62 states and 5877 transitions. [2023-08-29 23:27:03,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 878 transitions, 12902 flow [2023-08-29 23:27:03,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 878 transitions, 10185 flow, removed 1218 selfloop flow, removed 7 redundant places. [2023-08-29 23:27:03,783 INFO L231 Difference]: Finished difference. Result has 173 places, 456 transitions, 6064 flow [2023-08-29 23:27:03,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=6064, PETRI_PLACES=173, PETRI_TRANSITIONS=456} [2023-08-29 23:27:03,785 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 146 predicate places. [2023-08-29 23:27:03,785 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 456 transitions, 6064 flow [2023-08-29 23:27:03,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.44444444444444) internal successors, (1646), 18 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:03,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:03,793 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:03,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:27:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-29 23:27:04,005 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-29 23:27:04,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash -639435342, now seen corresponding path program 5 times [2023-08-29 23:27:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:27:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364891118] [2023-08-29 23:27:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:27:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:27:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:27:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:27:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364891118] [2023-08-29 23:27:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364891118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:27:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462795874] [2023-08-29 23:27:04,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:27:04,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:27:04,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:27:04,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:27:04,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 23:27:04,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-29 23:27:04,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:27:04,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:27:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:29:50,174 WARN L222 SmtUtils]: Spent 2.57m on a formula simplification. DAG size of input: 3031 DAG size of output: 3023 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15