./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-4.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-4.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 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 --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 23:28:20,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:28:20,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:28:20,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:28:20,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:28:20,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:28:20,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:28:20,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:28:20,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:28:20,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:28:20,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:28:20,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:28:20,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:28:20,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:28:20,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:28:20,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:28:20,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:28:20,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:28:20,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:28:20,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:28:20,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:28:20,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:28:20,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:28:20,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:28:20,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:28:20,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:28:20,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:28:20,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:28:20,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:28:20,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:28:20,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:28:20,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:28:20,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:28:20,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:28:20,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:28:20,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:28:20,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:28:20,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:28:20,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:28:20,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:28:20,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:28:20,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:28:20,937 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:28:20,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:28:20,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:28:20,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:28:20,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:28:20,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:28:20,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:28:20,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:28:20,941 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:28:20,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:28:20,941 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:28:20,942 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:28:20,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:28:20,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:28:20,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:28:20,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:28:20,943 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:28:20,943 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:28:20,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:28:20,943 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:28:20,943 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:28:20,944 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:28:20,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:28:20,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:28:20,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:28:20,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:28:20,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:28:20,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:28:20,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:28:20,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:28:20,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:28:20,946 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:28:20,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:28:20,946 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:28:20,946 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ed4cbcf73a390a7811d007883e420d1e9d8d4b9f5e59201847b4262dc4b0025 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:28:21,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:28:21,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:28:21,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:28:21,249 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:28:21,249 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:28:21,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-29 23:28:22,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:28:22,511 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:28:22,511 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-29 23:28:22,517 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6fc1617b/3e7114431687414b937b07f495eda37b/FLAG0761b6392 [2023-08-29 23:28:22,529 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6fc1617b/3e7114431687414b937b07f495eda37b [2023-08-29 23:28:22,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:28:22,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:28:22,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:28:22,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:28:22,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:28:22,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a24e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22, skipping insertion in model container [2023-08-29 23:28:22,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:28:22,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:28:22,685 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-4.wvr.c[2950,2963] [2023-08-29 23:28:22,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:28:22,696 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:28:22,714 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-4.wvr.c[2950,2963] [2023-08-29 23:28:22,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:28:22,722 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:28:22,722 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:28:22,727 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:28:22,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22 WrapperNode [2023-08-29 23:28:22,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:28:22,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:28:22,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:28:22,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:28:22,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,764 INFO L138 Inliner]: procedures = 22, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-08-29 23:28:22,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:28:22,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:28:22,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:28:22,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:28:22,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,805 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:28:22,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:28:22,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:28:22,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:28:22,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (1/1) ... [2023-08-29 23:28:22,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:28:22,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:22,842 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 23:28:22,867 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 23:28:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:28:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:28:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:28:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:28:22,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:28:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:28:22,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:28:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:28:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:28:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:28:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:28:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:28:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:28:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:28:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:28:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:28:22,889 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 23:28:23,034 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:28:23,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:28:23,289 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:28:23,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:28:23,309 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 23:28:23,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:28:23 BoogieIcfgContainer [2023-08-29 23:28:23,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:28:23,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:28:23,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:28:23,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:28:23,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:28:22" (1/3) ... [2023-08-29 23:28:23,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa66e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:28:23, skipping insertion in model container [2023-08-29 23:28:23,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:28:22" (2/3) ... [2023-08-29 23:28:23,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa66e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:28:23, skipping insertion in model container [2023-08-29 23:28:23,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:28:23" (3/3) ... [2023-08-29 23:28:23,317 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-08-29 23:28:23,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:28:23,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-29 23:28:23,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:28:23,399 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:28:23,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 119 transitions, 262 flow [2023-08-29 23:28:23,494 INFO L130 PetriNetUnfolder]: 7/116 cut-off events. [2023-08-29 23:28:23,494 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:28:23,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 116 events. 7/116 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 118 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-29 23:28:23,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 119 transitions, 262 flow [2023-08-29 23:28:23,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 242 flow [2023-08-29 23:28:23,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:28:23,524 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 242 flow [2023-08-29 23:28:23,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 242 flow [2023-08-29 23:28:23,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 242 flow [2023-08-29 23:28:23,575 INFO L130 PetriNetUnfolder]: 7/112 cut-off events. [2023-08-29 23:28:23,575 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:28:23,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 7/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 116 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-29 23:28:23,579 INFO L119 LiptonReduction]: Number of co-enabled transitions 1458 [2023-08-29 23:28:27,312 INFO L134 LiptonReduction]: Checked pairs total: 2027 [2023-08-29 23:28:27,313 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-29 23:28:27,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:28:27,328 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;@26b239a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:28:27,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-29 23:28:27,330 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 23:28:27,330 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:28:27,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:27,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:28:27,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:27,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash 445, now seen corresponding path program 1 times [2023-08-29 23:28:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602621680] [2023-08-29 23:28:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:27,411 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 23:28:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602621680] [2023-08-29 23:28:27,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602621680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:27,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:27,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:28:27,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772382160] [2023-08-29 23:28:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:27,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:28:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:27,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:28:27,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:28:27,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 227 [2023-08-29 23:28:27,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 23:28:27,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:27,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 227 [2023-08-29 23:28:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:27,556 INFO L130 PetriNetUnfolder]: 356/556 cut-off events. [2023-08-29 23:28:27,556 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-29 23:28:27,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 556 events. 356/556 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2383 event pairs, 270 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 929. Up to 552 conditions per place. [2023-08-29 23:28:27,562 INFO L137 encePairwiseOnDemand]: 224/227 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-29 23:28:27,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 140 flow [2023-08-29 23:28:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:28:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:28:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 246 transitions. [2023-08-29 23:28:27,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5418502202643172 [2023-08-29 23:28:27,574 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 246 transitions. [2023-08-29 23:28:27,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 246 transitions. [2023-08-29 23:28:27,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:27,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 246 transitions. [2023-08-29 23:28:27,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 123.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 23:28:27,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 23:28:27,583 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 23:28:27,585 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 88 flow. Second operand 2 states and 246 transitions. [2023-08-29 23:28:27,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 140 flow [2023-08-29 23:28:27,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:28:27,589 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 70 flow [2023-08-29 23:28:27,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-29 23:28:27,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-29 23:28:27,594 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 70 flow [2023-08-29 23:28:27,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 23:28:27,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:27,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:28:27,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:28:27,595 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:27,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash 436374, now seen corresponding path program 1 times [2023-08-29 23:28:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:27,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544907831] [2023-08-29 23:28:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:27,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:27,920 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 23:28:27,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544907831] [2023-08-29 23:28:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544907831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:27,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:27,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:28:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63887966] [2023-08-29 23:28:27,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:27,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:28:27,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:27,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:28:27,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:28:27,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 227 [2023-08-29 23:28:27,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 23:28:27,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:27,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 227 [2023-08-29 23:28:27,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:28,066 INFO L130 PetriNetUnfolder]: 340/529 cut-off events. [2023-08-29 23:28:28,066 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:28:28,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 529 events. 340/529 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2240 event pairs, 258 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 1069. Up to 524 conditions per place. [2023-08-29 23:28:28,070 INFO L137 encePairwiseOnDemand]: 224/227 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 23:28:28,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 120 flow [2023-08-29 23:28:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:28:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:28:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-29 23:28:28,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919236417033774 [2023-08-29 23:28:28,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-29 23:28:28,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-29 23:28:28,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:28,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-29 23:28:28,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:28,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,082 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 3 states and 335 transitions. [2023-08-29 23:28:28,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 120 flow [2023-08-29 23:28:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:28:28,083 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 68 flow [2023-08-29 23:28:28,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-29 23:28:28,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-29 23:28:28,084 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 68 flow [2023-08-29 23:28:28,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 23:28:28,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:28,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:28:28,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:28:28,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:28,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:28,086 INFO L85 PathProgramCache]: Analyzing trace with hash 436373, now seen corresponding path program 1 times [2023-08-29 23:28:28,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:28,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841855118] [2023-08-29 23:28:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:28,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:28,160 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 23:28:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841855118] [2023-08-29 23:28:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841855118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:28,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:28,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:28:28,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124866675] [2023-08-29 23:28:28,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:28,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:28:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:28:28,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:28:28,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 227 [2023-08-29 23:28:28,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 23:28:28,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:28,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 227 [2023-08-29 23:28:28,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:28,286 INFO L130 PetriNetUnfolder]: 324/502 cut-off events. [2023-08-29 23:28:28,287 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:28:28,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 502 events. 324/502 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2096 event pairs, 246 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 1016. Up to 497 conditions per place. [2023-08-29 23:28:28,290 INFO L137 encePairwiseOnDemand]: 224/227 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-29 23:28:28,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 114 flow [2023-08-29 23:28:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:28:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:28:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2023-08-29 23:28:28,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669603524229075 [2023-08-29 23:28:28,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2023-08-29 23:28:28,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2023-08-29 23:28:28,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:28,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2023-08-29 23:28:28,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 23:28:28,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,296 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 68 flow. Second operand 3 states and 318 transitions. [2023-08-29 23:28:28,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 114 flow [2023-08-29 23:28:28,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:28,297 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 65 flow [2023-08-29 23:28:28,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-29 23:28:28,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-08-29 23:28:28,301 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 65 flow [2023-08-29 23:28:28,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 23:28:28,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:28,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:28:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:28:28,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:28,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 419366196, now seen corresponding path program 1 times [2023-08-29 23:28:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749122492] [2023-08-29 23:28:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:28,381 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 23:28:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749122492] [2023-08-29 23:28:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749122492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:28:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580827872] [2023-08-29 23:28:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:28:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:28:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:28:28,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 227 [2023-08-29 23:28:28,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 23:28:28,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:28,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 227 [2023-08-29 23:28:28,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:28,493 INFO L130 PetriNetUnfolder]: 303/467 cut-off events. [2023-08-29 23:28:28,493 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:28:28,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 467 events. 303/467 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1927 event pairs, 231 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 947. Up to 462 conditions per place. [2023-08-29 23:28:28,497 INFO L137 encePairwiseOnDemand]: 224/227 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 23:28:28,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 107 flow [2023-08-29 23:28:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:28:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:28:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-29 23:28:28,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46402349486049926 [2023-08-29 23:28:28,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-29 23:28:28,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-29 23:28:28,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:28,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-29 23:28:28,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 23:28:28,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,503 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 316 transitions. [2023-08-29 23:28:28,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 107 flow [2023-08-29 23:28:28,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:28,504 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 62 flow [2023-08-29 23:28:28,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-29 23:28:28,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -10 predicate places. [2023-08-29 23:28:28,506 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 62 flow [2023-08-29 23:28:28,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 23:28:28,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:28,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:28:28,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:28:28,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:28,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:28,508 INFO L85 PathProgramCache]: Analyzing trace with hash 419366194, now seen corresponding path program 1 times [2023-08-29 23:28:28,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894342125] [2023-08-29 23:28:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:28,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:28,585 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 23:28:28,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:28,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894342125] [2023-08-29 23:28:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894342125] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:28,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:28,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:28:28,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680203022] [2023-08-29 23:28:28,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:28:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:28:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:28:28,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 227 [2023-08-29 23:28:28,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 62 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 23:28:28,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:28,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 227 [2023-08-29 23:28:28,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:28,678 INFO L130 PetriNetUnfolder]: 282/432 cut-off events. [2023-08-29 23:28:28,679 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:28:28,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 432 events. 282/432 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1709 event pairs, 216 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 878. Up to 427 conditions per place. [2023-08-29 23:28:28,683 INFO L137 encePairwiseOnDemand]: 224/227 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-29 23:28:28,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2023-08-29 23:28:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:28:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:28:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-29 23:28:28,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831130690161527 [2023-08-29 23:28:28,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-29 23:28:28,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-29 23:28:28,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:28,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-29 23:28:28,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 23:28:28,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,689 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 62 flow. Second operand 3 states and 329 transitions. [2023-08-29 23:28:28,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 100 flow [2023-08-29 23:28:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:28,691 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 59 flow [2023-08-29 23:28:28,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-29 23:28:28,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-29 23:28:28,693 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 59 flow [2023-08-29 23:28:28,694 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 23:28:28,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:28,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:28,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:28:28,694 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:28,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash -716002685, now seen corresponding path program 1 times [2023-08-29 23:28:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:28,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621266341] [2023-08-29 23:28:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:28,747 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 23:28:28,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:28,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621266341] [2023-08-29 23:28:28,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621266341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:28,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:28,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:28:28,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944115298] [2023-08-29 23:28:28,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:28:28,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:28,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:28:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:28:28,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 227 [2023-08-29 23:28:28,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:28,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:28,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 227 [2023-08-29 23:28:28,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:28,840 INFO L130 PetriNetUnfolder]: 224/350 cut-off events. [2023-08-29 23:28:28,841 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:28:28,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 350 events. 224/350 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1321 event pairs, 170 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 715. Up to 345 conditions per place. [2023-08-29 23:28:28,843 INFO L137 encePairwiseOnDemand]: 225/227 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-29 23:28:28,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 97 flow [2023-08-29 23:28:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:28:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:28:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-29 23:28:28,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46255506607929514 [2023-08-29 23:28:28,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-29 23:28:28,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-29 23:28:28,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:28,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-29 23:28:28,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 23:28:28,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:28,848 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 59 flow. Second operand 3 states and 315 transitions. [2023-08-29 23:28:28,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 97 flow [2023-08-29 23:28:28,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:28,849 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 58 flow [2023-08-29 23:28:28,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-29 23:28:28,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-29 23:28:28,850 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 58 flow [2023-08-29 23:28:28,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:28,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:28,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:28,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:28:28,851 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:28,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash -716002686, now seen corresponding path program 1 times [2023-08-29 23:28:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:28,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513297232] [2023-08-29 23:28:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:28,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:28,973 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 23:28:28,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513297232] [2023-08-29 23:28:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513297232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:28,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:28,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:28:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561516833] [2023-08-29 23:28:28,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:28:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:28:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:28:29,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 227 [2023-08-29 23:28:29,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:29,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:29,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 227 [2023-08-29 23:28:29,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:29,105 INFO L130 PetriNetUnfolder]: 166/268 cut-off events. [2023-08-29 23:28:29,106 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-29 23:28:29,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 268 events. 166/268 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 965 event pairs, 124 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 552. Up to 263 conditions per place. [2023-08-29 23:28:29,107 INFO L137 encePairwiseOnDemand]: 225/227 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-29 23:28:29,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 94 flow [2023-08-29 23:28:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:28:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:28:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-29 23:28:29,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42143906020558003 [2023-08-29 23:28:29,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-29 23:28:29,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-29 23:28:29,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:29,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-29 23:28:29,111 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 23:28:29,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:29,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states 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 23:28:29,113 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 58 flow. Second operand 3 states and 287 transitions. [2023-08-29 23:28:29,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 94 flow [2023-08-29 23:28:29,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:29,114 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 57 flow [2023-08-29 23:28:29,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-29 23:28:29,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-29 23:28:29,115 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 57 flow [2023-08-29 23:28:29,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:29,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:29,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:29,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:28:29,116 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:29,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash 751576771, now seen corresponding path program 1 times [2023-08-29 23:28:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612692307] [2023-08-29 23:28:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:29,426 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 23:28:29,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:29,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612692307] [2023-08-29 23:28:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612692307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:28:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100934711] [2023-08-29 23:28:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:29,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:28:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:28:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:28:29,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 227 [2023-08-29 23:28:29,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 23:28:29,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:29,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 227 [2023-08-29 23:28:29,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:29,539 INFO L130 PetriNetUnfolder]: 190/289 cut-off events. [2023-08-29 23:28:29,540 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:28:29,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 289 events. 190/289 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 967 event pairs, 9 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 599. Up to 135 conditions per place. [2023-08-29 23:28:29,541 INFO L137 encePairwiseOnDemand]: 223/227 looper letters, 33 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-29 23:28:29,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 165 flow [2023-08-29 23:28:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:28:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:28:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 442 transitions. [2023-08-29 23:28:29,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486784140969163 [2023-08-29 23:28:29,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 442 transitions. [2023-08-29 23:28:29,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 442 transitions. [2023-08-29 23:28:29,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:29,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 442 transitions. [2023-08-29 23:28:29,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 23:28:29,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 23:28:29,547 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 23:28:29,547 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 57 flow. Second operand 4 states and 442 transitions. [2023-08-29 23:28:29,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 165 flow [2023-08-29 23:28:29,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:28:29,549 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 74 flow [2023-08-29 23:28:29,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-29 23:28:29,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-29 23:28:29,552 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 74 flow [2023-08-29 23:28:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 23:28:29,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:29,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 23:28:29,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:29,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1774895439, now seen corresponding path program 2 times [2023-08-29 23:28:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:29,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583460302] [2023-08-29 23:28:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:29,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:29,850 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 23:28:29,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583460302] [2023-08-29 23:28:29,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583460302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:29,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:28:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345788122] [2023-08-29 23:28:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:29,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:28:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:28:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:28:29,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 227 [2023-08-29 23:28:29,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 23:28:29,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:29,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 227 [2023-08-29 23:28:29,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:29,958 INFO L130 PetriNetUnfolder]: 98/172 cut-off events. [2023-08-29 23:28:29,959 INFO L131 PetriNetUnfolder]: For 19/32 co-relation queries the response was YES. [2023-08-29 23:28:29,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 172 events. 98/172 cut-off events. For 19/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 490 event pairs, 9 based on Foata normal form. 13/175 useless extension candidates. Maximal degree in co-relation 386. Up to 103 conditions per place. [2023-08-29 23:28:29,960 INFO L137 encePairwiseOnDemand]: 223/227 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-29 23:28:29,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 165 flow [2023-08-29 23:28:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:28:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:28:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-29 23:28:29,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790748898678414 [2023-08-29 23:28:29,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-29 23:28:29,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-29 23:28:29,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:29,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-29 23:28:29,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states 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 23:28:29,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 23:28:29,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 227.0) internal successors, (1135), 5 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states 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 23:28:29,966 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 74 flow. Second operand 4 states and 435 transitions. [2023-08-29 23:28:29,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 165 flow [2023-08-29 23:28:29,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:29,967 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-08-29 23:28:29,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=71, 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=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-29 23:28:29,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-08-29 23:28:29,968 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-08-29 23:28:29,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states 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 23:28:29,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:29,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:29,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:28:29,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:29,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1938670985, now seen corresponding path program 3 times [2023-08-29 23:28:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862279413] [2023-08-29 23:28:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:30,152 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 23:28:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:30,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862279413] [2023-08-29 23:28:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862279413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:30,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:30,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:28:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758804341] [2023-08-29 23:28:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:30,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:28:30,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:28:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:28:30,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 227 [2023-08-29 23:28:30,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 23:28:30,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:30,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 227 [2023-08-29 23:28:30,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:30,266 INFO L130 PetriNetUnfolder]: 154/249 cut-off events. [2023-08-29 23:28:30,266 INFO L131 PetriNetUnfolder]: For 100/110 co-relation queries the response was YES. [2023-08-29 23:28:30,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 249 events. 154/249 cut-off events. For 100/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 764 event pairs, 12 based on Foata normal form. 18/267 useless extension candidates. Maximal degree in co-relation 622. Up to 87 conditions per place. [2023-08-29 23:28:30,268 INFO L137 encePairwiseOnDemand]: 221/227 looper letters, 34 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-29 23:28:30,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 224 flow [2023-08-29 23:28:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:28:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:28:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 541 transitions. [2023-08-29 23:28:30,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47665198237885464 [2023-08-29 23:28:30,270 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 541 transitions. [2023-08-29 23:28:30,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 541 transitions. [2023-08-29 23:28:30,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:30,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 541 transitions. [2023-08-29 23:28:30,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:30,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 23:28:30,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 23:28:30,274 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 5 states and 541 transitions. [2023-08-29 23:28:30,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 224 flow [2023-08-29 23:28:30,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:28:30,276 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 132 flow [2023-08-29 23:28:30,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-29 23:28:30,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-29 23:28:30,277 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 132 flow [2023-08-29 23:28:30,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 23:28:30,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:30,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:30,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:28:30,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:30,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash 456787813, now seen corresponding path program 4 times [2023-08-29 23:28:30,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:30,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238823247] [2023-08-29 23:28:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:30,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:30,477 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 23:28:30,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238823247] [2023-08-29 23:28:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238823247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:30,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:28:30,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126064999] [2023-08-29 23:28:30,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:28:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:28:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:28:30,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 227 [2023-08-29 23:28:30,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:30,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:30,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 227 [2023-08-29 23:28:30,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:30,637 INFO L130 PetriNetUnfolder]: 239/394 cut-off events. [2023-08-29 23:28:30,638 INFO L131 PetriNetUnfolder]: For 459/472 co-relation queries the response was YES. [2023-08-29 23:28:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 394 events. 239/394 cut-off events. For 459/472 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1342 event pairs, 15 based on Foata normal form. 27/421 useless extension candidates. Maximal degree in co-relation 1121. Up to 236 conditions per place. [2023-08-29 23:28:30,640 INFO L137 encePairwiseOnDemand]: 220/227 looper letters, 31 selfloop transitions, 3 changer transitions 26/62 dead transitions. [2023-08-29 23:28:30,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 378 flow [2023-08-29 23:28:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:28:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:28:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 733 transitions. [2023-08-29 23:28:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46129641283826306 [2023-08-29 23:28:30,642 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 733 transitions. [2023-08-29 23:28:30,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 733 transitions. [2023-08-29 23:28:30,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:30,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 733 transitions. [2023-08-29 23:28:30,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.71428571428571) internal successors, (733), 7 states have internal predecessors, (733), 0 states have call successors, (0), 0 states 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 23:28:30,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 23:28:30,647 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 227.0) internal successors, (1816), 8 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 23:28:30,647 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 132 flow. Second operand 7 states and 733 transitions. [2023-08-29 23:28:30,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 378 flow [2023-08-29 23:28:30,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 62 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:28:30,650 INFO L231 Difference]: Finished difference. Result has 53 places, 30 transitions, 161 flow [2023-08-29 23:28:30,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=53, PETRI_TRANSITIONS=30} [2023-08-29 23:28:30,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-29 23:28:30,651 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 30 transitions, 161 flow [2023-08-29 23:28:30,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.4) internal successors, (502), 5 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:30,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:30,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:30,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 23:28:30,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:30,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1376646480, now seen corresponding path program 1 times [2023-08-29 23:28:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148349022] [2023-08-29 23:28:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:30,762 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 23:28:30,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148349022] [2023-08-29 23:28:30,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148349022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:30,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:30,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:28:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779808816] [2023-08-29 23:28:30,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:28:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:28:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:28:30,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 227 [2023-08-29 23:28:30,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 30 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 23:28:30,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:30,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 227 [2023-08-29 23:28:30,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:30,987 INFO L130 PetriNetUnfolder]: 246/409 cut-off events. [2023-08-29 23:28:30,987 INFO L131 PetriNetUnfolder]: For 720/720 co-relation queries the response was YES. [2023-08-29 23:28:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 409 events. 246/409 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1274 event pairs, 0 based on Foata normal form. 20/429 useless extension candidates. Maximal degree in co-relation 1511. Up to 137 conditions per place. [2023-08-29 23:28:30,990 INFO L137 encePairwiseOnDemand]: 218/227 looper letters, 61 selfloop transitions, 17 changer transitions 8/86 dead transitions. [2023-08-29 23:28:30,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 599 flow [2023-08-29 23:28:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:28:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:28:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 944 transitions. [2023-08-29 23:28:30,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620655898188938 [2023-08-29 23:28:30,993 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 944 transitions. [2023-08-29 23:28:30,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 944 transitions. [2023-08-29 23:28:30,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:30,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 944 transitions. [2023-08-29 23:28:30,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.88888888888889) internal successors, (944), 9 states have internal predecessors, (944), 0 states have call successors, (0), 0 states 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 23:28:30,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 227.0) internal successors, (2270), 10 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states 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 23:28:30,999 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 227.0) internal successors, (2270), 10 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states 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 23:28:30,999 INFO L175 Difference]: Start difference. First operand has 53 places, 30 transitions, 161 flow. Second operand 9 states and 944 transitions. [2023-08-29 23:28:30,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 599 flow [2023-08-29 23:28:31,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 570 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-29 23:28:31,003 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 294 flow [2023-08-29 23:28:31,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=294, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2023-08-29 23:28:31,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2023-08-29 23:28:31,004 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 294 flow [2023-08-29 23:28:31,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 23:28:31,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:31,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 23:28:31,005 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:31,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:31,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1246459556, now seen corresponding path program 2 times [2023-08-29 23:28:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267525249] [2023-08-29 23:28:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:31,215 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 23:28:31,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:31,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267525249] [2023-08-29 23:28:31,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267525249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:31,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:31,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:28:31,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304617704] [2023-08-29 23:28:31,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:31,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:28:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:28:31,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:28:31,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-29 23:28:31,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 23:28:31,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:31,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-29 23:28:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:31,470 INFO L130 PetriNetUnfolder]: 277/523 cut-off events. [2023-08-29 23:28:31,470 INFO L131 PetriNetUnfolder]: For 2560/2584 co-relation queries the response was YES. [2023-08-29 23:28:31,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 523 events. 277/523 cut-off events. For 2560/2584 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2218 event pairs, 16 based on Foata normal form. 38/550 useless extension candidates. Maximal degree in co-relation 2364. Up to 257 conditions per place. [2023-08-29 23:28:31,474 INFO L137 encePairwiseOnDemand]: 220/227 looper letters, 41 selfloop transitions, 5 changer transitions 40/94 dead transitions. [2023-08-29 23:28:31,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 834 flow [2023-08-29 23:28:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:28:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:28:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 811 transitions. [2023-08-29 23:28:31,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44658590308370044 [2023-08-29 23:28:31,477 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 811 transitions. [2023-08-29 23:28:31,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 811 transitions. [2023-08-29 23:28:31,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:31,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 811 transitions. [2023-08-29 23:28:31,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.375) internal successors, (811), 8 states have internal predecessors, (811), 0 states have call successors, (0), 0 states 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 23:28:31,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 23:28:31,481 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 23:28:31,482 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 294 flow. Second operand 8 states and 811 transitions. [2023-08-29 23:28:31,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 834 flow [2023-08-29 23:28:31,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 789 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 23:28:31,489 INFO L231 Difference]: Finished difference. Result has 68 places, 42 transitions, 336 flow [2023-08-29 23:28:31,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=42} [2023-08-29 23:28:31,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2023-08-29 23:28:31,490 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 42 transitions, 336 flow [2023-08-29 23:28:31,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 23:28:31,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:31,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:31,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 23:28:31,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:31,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1142820548, now seen corresponding path program 1 times [2023-08-29 23:28:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:31,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131625509] [2023-08-29 23:28:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:31,806 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 23:28:31,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:31,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131625509] [2023-08-29 23:28:31,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131625509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:28:31,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:28:31,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:28:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100527912] [2023-08-29 23:28:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:28:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:28:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:28:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:28:31,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 227 [2023-08-29 23:28:31,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 42 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 96.16666666666667) internal successors, (577), 6 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 23:28:31,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:31,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 227 [2023-08-29 23:28:31,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:32,019 INFO L130 PetriNetUnfolder]: 349/587 cut-off events. [2023-08-29 23:28:32,019 INFO L131 PetriNetUnfolder]: For 4281/4320 co-relation queries the response was YES. [2023-08-29 23:28:32,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 587 events. 349/587 cut-off events. For 4281/4320 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2179 event pairs, 33 based on Foata normal form. 47/629 useless extension candidates. Maximal degree in co-relation 3155. Up to 373 conditions per place. [2023-08-29 23:28:32,024 INFO L137 encePairwiseOnDemand]: 220/227 looper letters, 47 selfloop transitions, 5 changer transitions 34/89 dead transitions. [2023-08-29 23:28:32,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 935 flow [2023-08-29 23:28:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:28:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:28:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 807 transitions. [2023-08-29 23:28:32,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44438325991189426 [2023-08-29 23:28:32,027 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 807 transitions. [2023-08-29 23:28:32,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 807 transitions. [2023-08-29 23:28:32,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:32,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 807 transitions. [2023-08-29 23:28:32,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states 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 23:28:32,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 23:28:32,033 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 227.0) internal successors, (2043), 9 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 23:28:32,033 INFO L175 Difference]: Start difference. First operand has 68 places, 42 transitions, 336 flow. Second operand 8 states and 807 transitions. [2023-08-29 23:28:32,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 935 flow [2023-08-29 23:28:32,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 888 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-29 23:28:32,044 INFO L231 Difference]: Finished difference. Result has 72 places, 44 transitions, 386 flow [2023-08-29 23:28:32,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=72, PETRI_TRANSITIONS=44} [2023-08-29 23:28:32,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2023-08-29 23:28:32,044 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 44 transitions, 386 flow [2023-08-29 23:28:32,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.16666666666667) internal successors, (577), 6 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 23:28:32,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:32,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:32,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 23:28:32,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:32,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:32,046 INFO L85 PathProgramCache]: Analyzing trace with hash -475924067, now seen corresponding path program 3 times [2023-08-29 23:28:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858513993] [2023-08-29 23:28:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:32,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:32,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:32,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858513993] [2023-08-29 23:28:32,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858513993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:32,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846280574] [2023-08-29 23:28:32,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:28:32,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:32,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:32,396 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 23:28:32,427 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 23:28:32,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:28:32,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:28:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:28:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846280574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:33,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:33,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2023-08-29 23:28:33,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347824987] [2023-08-29 23:28:33,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 23:28:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 23:28:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-29 23:28:33,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 227 [2023-08-29 23:28:33,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 44 transitions, 386 flow. Second operand has 13 states, 13 states have (on average 91.53846153846153) internal successors, (1190), 13 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 23:28:33,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:33,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 227 [2023-08-29 23:28:33,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:33,742 INFO L130 PetriNetUnfolder]: 388/655 cut-off events. [2023-08-29 23:28:33,743 INFO L131 PetriNetUnfolder]: For 6762/6762 co-relation queries the response was YES. [2023-08-29 23:28:33,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3770 conditions, 655 events. 388/655 cut-off events. For 6762/6762 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2428 event pairs, 13 based on Foata normal form. 58/713 useless extension candidates. Maximal degree in co-relation 3745. Up to 187 conditions per place. [2023-08-29 23:28:33,748 INFO L137 encePairwiseOnDemand]: 217/227 looper letters, 58 selfloop transitions, 20 changer transitions 64/142 dead transitions. [2023-08-29 23:28:33,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 142 transitions, 1669 flow [2023-08-29 23:28:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-29 23:28:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-29 23:28:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1888 transitions. [2023-08-29 23:28:33,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41585903083700443 [2023-08-29 23:28:33,754 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1888 transitions. [2023-08-29 23:28:33,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1888 transitions. [2023-08-29 23:28:33,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:33,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1888 transitions. [2023-08-29 23:28:33,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 94.4) internal successors, (1888), 20 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states 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 23:28:33,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 227.0) internal successors, (4767), 21 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states 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 23:28:33,764 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 227.0) internal successors, (4767), 21 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states 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 23:28:33,765 INFO L175 Difference]: Start difference. First operand has 72 places, 44 transitions, 386 flow. Second operand 20 states and 1888 transitions. [2023-08-29 23:28:33,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 142 transitions, 1669 flow [2023-08-29 23:28:33,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1492 flow, removed 84 selfloop flow, removed 6 redundant places. [2023-08-29 23:28:33,781 INFO L231 Difference]: Finished difference. Result has 95 places, 48 transitions, 498 flow [2023-08-29 23:28:33,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=498, PETRI_PLACES=95, PETRI_TRANSITIONS=48} [2023-08-29 23:28:33,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2023-08-29 23:28:33,782 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 48 transitions, 498 flow [2023-08-29 23:28:33,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 91.53846153846153) internal successors, (1190), 13 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 23:28:33,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:33,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:33,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 23:28:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 23:28:33,988 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:33,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1700429557, now seen corresponding path program 1 times [2023-08-29 23:28:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051044980] [2023-08-29 23:28:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:34,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051044980] [2023-08-29 23:28:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051044980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:34,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215146743] [2023-08-29 23:28:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:34,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:34,398 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 23:28:34,426 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 23:28:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:28:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:34,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215146743] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:35,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-29 23:28:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717164700] [2023-08-29 23:28:35,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:35,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:28:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:28:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:28:35,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 227 [2023-08-29 23:28:35,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 48 transitions, 498 flow. Second operand has 16 states, 16 states have (on average 88.875) internal successors, (1422), 16 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 23:28:35,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:35,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 227 [2023-08-29 23:28:35,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:36,840 INFO L130 PetriNetUnfolder]: 691/1285 cut-off events. [2023-08-29 23:28:36,840 INFO L131 PetriNetUnfolder]: For 29523/29586 co-relation queries the response was YES. [2023-08-29 23:28:36,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9386 conditions, 1285 events. 691/1285 cut-off events. For 29523/29586 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6566 event pairs, 10 based on Foata normal form. 91/1356 useless extension candidates. Maximal degree in co-relation 9351. Up to 389 conditions per place. [2023-08-29 23:28:36,853 INFO L137 encePairwiseOnDemand]: 220/227 looper letters, 115 selfloop transitions, 66 changer transitions 140/330 dead transitions. [2023-08-29 23:28:36,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 330 transitions, 4223 flow [2023-08-29 23:28:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-29 23:28:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-29 23:28:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3982 transitions. [2023-08-29 23:28:36,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40795000512242596 [2023-08-29 23:28:36,862 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3982 transitions. [2023-08-29 23:28:36,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3982 transitions. [2023-08-29 23:28:36,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:36,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3982 transitions. [2023-08-29 23:28:36,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 92.6046511627907) internal successors, (3982), 43 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states 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 23:28:36,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 227.0) internal successors, (9988), 44 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states 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 23:28:36,883 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 227.0) internal successors, (9988), 44 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states 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 23:28:36,884 INFO L175 Difference]: Start difference. First operand has 95 places, 48 transitions, 498 flow. Second operand 43 states and 3982 transitions. [2023-08-29 23:28:36,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 330 transitions, 4223 flow [2023-08-29 23:28:36,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 330 transitions, 3316 flow, removed 408 selfloop flow, removed 16 redundant places. [2023-08-29 23:28:36,963 INFO L231 Difference]: Finished difference. Result has 121 places, 103 transitions, 1347 flow [2023-08-29 23:28:36,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=1347, PETRI_PLACES=121, PETRI_TRANSITIONS=103} [2023-08-29 23:28:36,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2023-08-29 23:28:36,965 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 103 transitions, 1347 flow [2023-08-29 23:28:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 88.875) internal successors, (1422), 16 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 23:28:36,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:36,972 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:36,981 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 23:28:37,179 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,SelfDestructingSolverStorable15 [2023-08-29 23:28:37,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:37,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -245747109, now seen corresponding path program 2 times [2023-08-29 23:28:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910085414] [2023-08-29 23:28:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:37,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:37,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910085414] [2023-08-29 23:28:37,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910085414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:37,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932652349] [2023-08-29 23:28:37,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:28:37,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:37,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:37,439 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 23:28:37,473 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 23:28:37,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:28:37,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:28:37,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:28:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:37,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932652349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:37,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:37,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2023-08-29 23:28:37,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628575091] [2023-08-29 23:28:37,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:37,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 23:28:37,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:37,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 23:28:37,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-29 23:28:38,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 227 [2023-08-29 23:28:38,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 103 transitions, 1347 flow. Second operand has 16 states, 16 states have (on average 91.375) internal successors, (1462), 16 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states 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 23:28:38,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:38,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 227 [2023-08-29 23:28:38,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:40,165 INFO L130 PetriNetUnfolder]: 1075/1786 cut-off events. [2023-08-29 23:28:40,165 INFO L131 PetriNetUnfolder]: For 26002/26002 co-relation queries the response was YES. [2023-08-29 23:28:40,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11681 conditions, 1786 events. 1075/1786 cut-off events. For 26002/26002 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8207 event pairs, 17 based on Foata normal form. 100/1886 useless extension candidates. Maximal degree in co-relation 11645. Up to 509 conditions per place. [2023-08-29 23:28:40,181 INFO L137 encePairwiseOnDemand]: 217/227 looper letters, 157 selfloop transitions, 80 changer transitions 150/387 dead transitions. [2023-08-29 23:28:40,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 387 transitions, 5070 flow [2023-08-29 23:28:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-29 23:28:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-29 23:28:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 5696 transitions. [2023-08-29 23:28:40,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113526395609157 [2023-08-29 23:28:40,199 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 5696 transitions. [2023-08-29 23:28:40,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 5696 transitions. [2023-08-29 23:28:40,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:40,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 5696 transitions. [2023-08-29 23:28:40,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 93.37704918032787) internal successors, (5696), 61 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states 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 23:28:40,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 227.0) internal successors, (14074), 62 states have internal predecessors, (14074), 0 states have call successors, (0), 0 states 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 23:28:40,235 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 227.0) internal successors, (14074), 62 states have internal predecessors, (14074), 0 states have call successors, (0), 0 states 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 23:28:40,235 INFO L175 Difference]: Start difference. First operand has 121 places, 103 transitions, 1347 flow. Second operand 61 states and 5696 transitions. [2023-08-29 23:28:40,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 387 transitions, 5070 flow [2023-08-29 23:28:40,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 387 transitions, 3352 flow, removed 827 selfloop flow, removed 11 redundant places. [2023-08-29 23:28:40,312 INFO L231 Difference]: Finished difference. Result has 193 places, 145 transitions, 1394 flow [2023-08-29 23:28:40,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1394, PETRI_PLACES=193, PETRI_TRANSITIONS=145} [2023-08-29 23:28:40,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2023-08-29 23:28:40,313 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 145 transitions, 1394 flow [2023-08-29 23:28:40,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.375) internal successors, (1462), 16 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states 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 23:28:40,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:40,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:40,324 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 23:28:40,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:40,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:40,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash 163521168, now seen corresponding path program 2 times [2023-08-29 23:28:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:40,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328628013] [2023-08-29 23:28:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:40,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:40,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:40,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328628013] [2023-08-29 23:28:40,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328628013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:40,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636585170] [2023-08-29 23:28:40,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:28:40,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:40,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:40,894 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 23:28:40,923 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 23:28:41,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:28:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:28:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:28:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:41,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:41,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636585170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:41,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:41,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-29 23:28:41,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693262400] [2023-08-29 23:28:41,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:41,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:28:41,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:41,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:28:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:28:41,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 227 [2023-08-29 23:28:41,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 145 transitions, 1394 flow. Second operand has 19 states, 19 states have (on average 86.36842105263158) internal successors, (1641), 19 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states 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 23:28:41,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:41,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 227 [2023-08-29 23:28:41,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:43,783 INFO L130 PetriNetUnfolder]: 1628/2701 cut-off events. [2023-08-29 23:28:43,784 INFO L131 PetriNetUnfolder]: For 70364/70364 co-relation queries the response was YES. [2023-08-29 23:28:43,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15998 conditions, 2701 events. 1628/2701 cut-off events. For 70364/70364 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13660 event pairs, 31 based on Foata normal form. 132/2833 useless extension candidates. Maximal degree in co-relation 15928. Up to 562 conditions per place. [2023-08-29 23:28:43,811 INFO L137 encePairwiseOnDemand]: 218/227 looper letters, 208 selfloop transitions, 116 changer transitions 140/464 dead transitions. [2023-08-29 23:28:43,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 464 transitions, 5447 flow [2023-08-29 23:28:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-29 23:28:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-29 23:28:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4375 transitions. [2023-08-29 23:28:43,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933291378225299 [2023-08-29 23:28:43,818 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4375 transitions. [2023-08-29 23:28:43,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4375 transitions. [2023-08-29 23:28:43,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:43,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4375 transitions. [2023-08-29 23:28:43,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 89.28571428571429) internal successors, (4375), 49 states have internal predecessors, (4375), 0 states have call successors, (0), 0 states 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 23:28:43,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 227.0) internal successors, (11350), 50 states have internal predecessors, (11350), 0 states have call successors, (0), 0 states 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 23:28:43,838 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 227.0) internal successors, (11350), 50 states have internal predecessors, (11350), 0 states have call successors, (0), 0 states 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 23:28:43,838 INFO L175 Difference]: Start difference. First operand has 193 places, 145 transitions, 1394 flow. Second operand 49 states and 4375 transitions. [2023-08-29 23:28:43,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 464 transitions, 5447 flow [2023-08-29 23:28:44,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 464 transitions, 4502 flow, removed 467 selfloop flow, removed 37 redundant places. [2023-08-29 23:28:44,008 INFO L231 Difference]: Finished difference. Result has 193 places, 195 transitions, 2113 flow [2023-08-29 23:28:44,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2113, PETRI_PLACES=193, PETRI_TRANSITIONS=195} [2023-08-29 23:28:44,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2023-08-29 23:28:44,009 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 195 transitions, 2113 flow [2023-08-29 23:28:44,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 86.36842105263158) internal successors, (1641), 19 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states 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 23:28:44,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:44,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:44,017 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 23:28:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 23:28:44,215 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:44,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -541230212, now seen corresponding path program 3 times [2023-08-29 23:28:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228854752] [2023-08-29 23:28:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:44,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228854752] [2023-08-29 23:28:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228854752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045306204] [2023-08-29 23:28:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:28:44,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:44,575 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 23:28:44,599 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 23:28:44,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:28:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:28:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:28:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045306204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:45,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:45,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-29 23:28:45,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701990652] [2023-08-29 23:28:45,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:45,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 23:28:45,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:45,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 23:28:45,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-29 23:28:45,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 227 [2023-08-29 23:28:45,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 195 transitions, 2113 flow. Second operand has 21 states, 21 states have (on average 86.04761904761905) internal successors, (1807), 21 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states 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 23:28:45,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:45,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 227 [2023-08-29 23:28:45,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:51,197 INFO L130 PetriNetUnfolder]: 3577/6088 cut-off events. [2023-08-29 23:28:51,197 INFO L131 PetriNetUnfolder]: For 157970/157970 co-relation queries the response was YES. [2023-08-29 23:28:51,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39586 conditions, 6088 events. 3577/6088 cut-off events. For 157970/157970 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 36983 event pairs, 127 based on Foata normal form. 358/6446 useless extension candidates. Maximal degree in co-relation 39520. Up to 1168 conditions per place. [2023-08-29 23:28:51,253 INFO L137 encePairwiseOnDemand]: 218/227 looper letters, 367 selfloop transitions, 347 changer transitions 365/1079 dead transitions. [2023-08-29 23:28:51,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1079 transitions, 13773 flow [2023-08-29 23:28:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-08-29 23:28:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2023-08-29 23:28:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 11201 transitions. [2023-08-29 23:28:51,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3916159709111251 [2023-08-29 23:28:51,270 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 11201 transitions. [2023-08-29 23:28:51,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 11201 transitions. [2023-08-29 23:28:51,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:51,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 11201 transitions. [2023-08-29 23:28:51,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 88.89682539682539) internal successors, (11201), 126 states have internal predecessors, (11201), 0 states have call successors, (0), 0 states 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 23:28:51,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 227.0) internal successors, (28829), 127 states have internal predecessors, (28829), 0 states have call successors, (0), 0 states 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 23:28:51,330 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 227.0) internal successors, (28829), 127 states have internal predecessors, (28829), 0 states have call successors, (0), 0 states 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 23:28:51,331 INFO L175 Difference]: Start difference. First operand has 193 places, 195 transitions, 2113 flow. Second operand 126 states and 11201 transitions. [2023-08-29 23:28:51,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1079 transitions, 13773 flow [2023-08-29 23:28:51,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 1079 transitions, 11978 flow, removed 796 selfloop flow, removed 30 redundant places. [2023-08-29 23:28:51,684 INFO L231 Difference]: Finished difference. Result has 340 places, 419 transitions, 5412 flow [2023-08-29 23:28:51,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=5412, PETRI_PLACES=340, PETRI_TRANSITIONS=419} [2023-08-29 23:28:51,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2023-08-29 23:28:51,685 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 419 transitions, 5412 flow [2023-08-29 23:28:51,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 86.04761904761905) internal successors, (1807), 21 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states 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 23:28:51,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:51,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:51,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-29 23:28:51,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:51,887 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:51,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 113633177, now seen corresponding path program 4 times [2023-08-29 23:28:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:51,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871300077] [2023-08-29 23:28:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:51,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:52,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:52,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871300077] [2023-08-29 23:28:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871300077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124778673] [2023-08-29 23:28:52,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:28:52,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:52,425 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 23:28:52,452 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 23:28:52,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:28:52,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:28:52,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:28:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:52,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124778673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:53,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2023-08-29 23:28:53,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985303412] [2023-08-29 23:28:53,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:53,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 23:28:53,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 23:28:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-08-29 23:28:53,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 227 [2023-08-29 23:28:53,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 419 transitions, 5412 flow. Second operand has 21 states, 21 states have (on average 88.80952380952381) internal successors, (1865), 21 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states 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 23:28:53,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:53,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 227 [2023-08-29 23:28:53,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:28:57,674 INFO L130 PetriNetUnfolder]: 5774/9774 cut-off events. [2023-08-29 23:28:57,674 INFO L131 PetriNetUnfolder]: For 1118260/1118282 co-relation queries the response was YES. [2023-08-29 23:28:57,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97415 conditions, 9774 events. 5774/9774 cut-off events. For 1118260/1118282 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 64431 event pairs, 138 based on Foata normal form. 398/10154 useless extension candidates. Maximal degree in co-relation 97293. Up to 2136 conditions per place. [2023-08-29 23:28:57,783 INFO L137 encePairwiseOnDemand]: 219/227 looper letters, 330 selfloop transitions, 495 changer transitions 442/1273 dead transitions. [2023-08-29 23:28:57,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1273 transitions, 21798 flow [2023-08-29 23:28:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-29 23:28:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-29 23:28:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 7251 transitions. [2023-08-29 23:28:57,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40433837060168404 [2023-08-29 23:28:57,792 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 7251 transitions. [2023-08-29 23:28:57,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 7251 transitions. [2023-08-29 23:28:57,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:28:57,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 7251 transitions. [2023-08-29 23:28:57,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 91.78481012658227) internal successors, (7251), 79 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states 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 23:28:57,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 227.0) internal successors, (18160), 80 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states 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 23:28:57,818 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 227.0) internal successors, (18160), 80 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states 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 23:28:57,818 INFO L175 Difference]: Start difference. First operand has 340 places, 419 transitions, 5412 flow. Second operand 79 states and 7251 transitions. [2023-08-29 23:28:57,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1273 transitions, 21798 flow [2023-08-29 23:28:59,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 1273 transitions, 16437 flow, removed 2486 selfloop flow, removed 82 redundant places. [2023-08-29 23:28:59,387 INFO L231 Difference]: Finished difference. Result has 320 places, 652 transitions, 9058 flow [2023-08-29 23:28:59,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=4598, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=9058, PETRI_PLACES=320, PETRI_TRANSITIONS=652} [2023-08-29 23:28:59,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2023-08-29 23:28:59,388 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 652 transitions, 9058 flow [2023-08-29 23:28:59,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 88.80952380952381) internal successors, (1865), 21 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states 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 23:28:59,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:59,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:59,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:28:59,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:59,594 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:59,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:59,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1677584677, now seen corresponding path program 5 times [2023-08-29 23:28:59,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:59,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90314098] [2023-08-29 23:28:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:29:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:00,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:29:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90314098] [2023-08-29 23:29:00,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90314098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:29:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625509161] [2023-08-29 23:29:00,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:29:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:29:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:29:00,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:29:00,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 23:29:00,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-29 23:29:00,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:29:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:29:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:29:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:00,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:29:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:00,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625509161] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:29:00,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:29:00,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-08-29 23:29:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872373323] [2023-08-29 23:29:01,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:29:01,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:29:01,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:29:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:29:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:29:01,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 227 [2023-08-29 23:29:01,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 652 transitions, 9058 flow. Second operand has 24 states, 24 states have (on average 88.0) internal successors, (2112), 24 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 23:29:01,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:29:01,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 227 [2023-08-29 23:29:01,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:09,036 INFO L130 PetriNetUnfolder]: 8745/16381 cut-off events. [2023-08-29 23:29:09,036 INFO L131 PetriNetUnfolder]: For 541146/541228 co-relation queries the response was YES. [2023-08-29 23:29:09,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134334 conditions, 16381 events. 8745/16381 cut-off events. For 541146/541228 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 135658 event pairs, 174 based on Foata normal form. 586/16786 useless extension candidates. Maximal degree in co-relation 134229. Up to 2926 conditions per place. [2023-08-29 23:29:09,222 INFO L137 encePairwiseOnDemand]: 220/227 looper letters, 505 selfloop transitions, 1173 changer transitions 693/2390 dead transitions. [2023-08-29 23:29:09,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 2390 transitions, 39410 flow [2023-08-29 23:29:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-08-29 23:29:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-08-29 23:29:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 9590 transitions. [2023-08-29 23:29:09,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40621823110809896 [2023-08-29 23:29:09,233 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 9590 transitions. [2023-08-29 23:29:09,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 9590 transitions. [2023-08-29 23:29:09,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:29:09,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 9590 transitions. [2023-08-29 23:29:09,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 92.21153846153847) internal successors, (9590), 104 states have internal predecessors, (9590), 0 states have call successors, (0), 0 states 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 23:29:09,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 227.0) internal successors, (23835), 105 states have internal predecessors, (23835), 0 states have call successors, (0), 0 states 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 23:29:09,271 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 227.0) internal successors, (23835), 105 states have internal predecessors, (23835), 0 states have call successors, (0), 0 states 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 23:29:09,271 INFO L175 Difference]: Start difference. First operand has 320 places, 652 transitions, 9058 flow. Second operand 104 states and 9590 transitions. [2023-08-29 23:29:09,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 2390 transitions, 39410 flow [2023-08-29 23:29:12,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 2390 transitions, 32307 flow, removed 2683 selfloop flow, removed 52 redundant places. [2023-08-29 23:29:12,533 INFO L231 Difference]: Finished difference. Result has 372 places, 1463 transitions, 22776 flow [2023-08-29 23:29:12,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=22776, PETRI_PLACES=372, PETRI_TRANSITIONS=1463} [2023-08-29 23:29:12,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2023-08-29 23:29:12,534 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1463 transitions, 22776 flow [2023-08-29 23:29:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.0) internal successors, (2112), 24 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 23:29:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:29:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:29:12,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:29:12,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:29:12,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:29:12,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:29:12,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2098640562, now seen corresponding path program 6 times [2023-08-29 23:29:12,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:29:12,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007772360] [2023-08-29 23:29:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:29:12,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:29:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:29:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:29:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007772360] [2023-08-29 23:29:13,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007772360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:29:13,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720579907] [2023-08-29 23:29:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:29:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:29:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:29:13,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:29:13,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 23:29:13,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-29 23:29:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:29:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-29 23:29:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:29:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:14,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:29:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:29:14,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720579907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:29:14,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:29:14,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 26 [2023-08-29 23:29:14,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196101455] [2023-08-29 23:29:14,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:29:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-29 23:29:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:29:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-29 23:29:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2023-08-29 23:29:14,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 227 [2023-08-29 23:29:14,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1463 transitions, 22776 flow. Second operand has 27 states, 27 states have (on average 85.77777777777777) internal successors, (2316), 27 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states 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 23:29:14,696 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:29:14,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 227 [2023-08-29 23:29:14,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:30,973 INFO L130 PetriNetUnfolder]: 23380/39203 cut-off events. [2023-08-29 23:29:30,973 INFO L131 PetriNetUnfolder]: For 793093/793093 co-relation queries the response was YES. [2023-08-29 23:29:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274340 conditions, 39203 events. 23380/39203 cut-off events. For 793093/793093 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 313103 event pairs, 1093 based on Foata normal form. 2264/41467 useless extension candidates. Maximal degree in co-relation 274234. Up to 9700 conditions per place. [2023-08-29 23:29:31,749 INFO L137 encePairwiseOnDemand]: 218/227 looper letters, 1150 selfloop transitions, 1780 changer transitions 1828/4758 dead transitions. [2023-08-29 23:29:31,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 4758 transitions, 82199 flow [2023-08-29 23:29:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-08-29 23:29:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2023-08-29 23:29:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 10675 transitions. [2023-08-29 23:29:31,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38864819601703865 [2023-08-29 23:29:31,761 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 10675 transitions. [2023-08-29 23:29:31,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 10675 transitions. [2023-08-29 23:29:31,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:29:31,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 10675 transitions. [2023-08-29 23:29:31,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 88.22314049586777) internal successors, (10675), 121 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states 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 23:29:31,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 227.0) internal successors, (27694), 122 states have internal predecessors, (27694), 0 states have call successors, (0), 0 states 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 23:29:31,802 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 227.0) internal successors, (27694), 122 states have internal predecessors, (27694), 0 states have call successors, (0), 0 states 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 23:29:31,802 INFO L175 Difference]: Start difference. First operand has 372 places, 1463 transitions, 22776 flow. Second operand 121 states and 10675 transitions. [2023-08-29 23:29:31,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 4758 transitions, 82199 flow [2023-08-29 23:29:46,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 4758 transitions, 77991 flow, removed 2072 selfloop flow, removed 32 redundant places. [2023-08-29 23:29:46,932 INFO L231 Difference]: Finished difference. Result has 519 places, 2568 transitions, 45186 flow [2023-08-29 23:29:46,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=21376, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=790, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=45186, PETRI_PLACES=519, PETRI_TRANSITIONS=2568} [2023-08-29 23:29:46,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2023-08-29 23:29:46,934 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 2568 transitions, 45186 flow [2023-08-29 23:29:46,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.77777777777777) internal successors, (2316), 27 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states 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 23:29:46,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:29:46,935 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:29:46,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:29:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 23:29:47,140 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:29:47,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:29:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 246720839, now seen corresponding path program 7 times [2023-08-29 23:29:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:29:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516048792] [2023-08-29 23:29:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:29:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:29:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:29:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:47,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:29:47,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516048792] [2023-08-29 23:29:47,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516048792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:29:47,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232511465] [2023-08-29 23:29:47,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:29:47,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:29:47,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:29:47,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:29:47,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 23:29:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:29:47,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:29:47,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:29:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:29:48,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:29:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:29:48,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232511465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:29:48,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:29:48,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 29 [2023-08-29 23:29:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257546491] [2023-08-29 23:29:48,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:29:48,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:29:48,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:29:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:29:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:29:49,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 227 [2023-08-29 23:29:49,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 2568 transitions, 45186 flow. Second operand has 30 states, 30 states have (on average 84.5) internal successors, (2535), 30 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 23:29:49,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:29:49,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 227 [2023-08-29 23:29:49,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:30:26,896 INFO L130 PetriNetUnfolder]: 33654/56759 cut-off events. [2023-08-29 23:30:26,896 INFO L131 PetriNetUnfolder]: For 5729302/5729302 co-relation queries the response was YES. [2023-08-29 23:30:28,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548978 conditions, 56759 events. 33654/56759 cut-off events. For 5729302/5729302 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 478429 event pairs, 1237 based on Foata normal form. 2592/59351 useless extension candidates. Maximal degree in co-relation 548797. Up to 14428 conditions per place. [2023-08-29 23:30:29,025 INFO L137 encePairwiseOnDemand]: 218/227 looper letters, 1300 selfloop transitions, 3278 changer transitions 1913/6491 dead transitions. [2023-08-29 23:30:29,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 6491 transitions, 130318 flow [2023-08-29 23:30:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2023-08-29 23:30:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2023-08-29 23:30:29,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 15405 transitions. [2023-08-29 23:30:29,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38779106356198867 [2023-08-29 23:30:29,046 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 15405 transitions. [2023-08-29 23:30:29,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 15405 transitions. [2023-08-29 23:30:29,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:30:29,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 15405 transitions. [2023-08-29 23:30:29,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 176 states, 175 states have (on average 88.02857142857142) internal successors, (15405), 175 states have internal predecessors, (15405), 0 states have call successors, (0), 0 states 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 23:30:29,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 176 states, 176 states have (on average 227.0) internal successors, (39952), 176 states have internal predecessors, (39952), 0 states have call successors, (0), 0 states 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 23:30:29,116 INFO L81 ComplementDD]: Finished complementDD. Result has 176 states, 176 states have (on average 227.0) internal successors, (39952), 176 states have internal predecessors, (39952), 0 states have call successors, (0), 0 states 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 23:30:29,116 INFO L175 Difference]: Start difference. First operand has 519 places, 2568 transitions, 45186 flow. Second operand 175 states and 15405 transitions. [2023-08-29 23:30:29,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 6491 transitions, 130318 flow [2023-08-29 23:31:46,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 6491 transitions, 114590 flow, removed 6210 selfloop flow, removed 83 redundant places. [2023-08-29 23:31:46,292 INFO L231 Difference]: Finished difference. Result has 633 places, 4160 transitions, 79305 flow [2023-08-29 23:31:46,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=42309, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=79305, PETRI_PLACES=633, PETRI_TRANSITIONS=4160} [2023-08-29 23:31:46,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 590 predicate places. [2023-08-29 23:31:46,297 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 4160 transitions, 79305 flow [2023-08-29 23:31:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.5) internal successors, (2535), 30 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states 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 23:31:46,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:31:46,297 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:31:46,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:31:46,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:31:46,503 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:31:46,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:31:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash 605819233, now seen corresponding path program 8 times [2023-08-29 23:31:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:31:46,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715559665] [2023-08-29 23:31:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:31:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:31:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:31:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:31:47,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715559665] [2023-08-29 23:31:47,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715559665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:31:47,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929324220] [2023-08-29 23:31:47,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:31:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:31:47,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:31:47,098 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:31:47,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 23:31:47,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:31:47,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:31:47,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:31:47,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:31:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:47,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:31:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:31:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929324220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:31:48,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:31:48,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 28 [2023-08-29 23:31:48,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933613709] [2023-08-29 23:31:48,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:31:48,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-29 23:31:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:31:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-29 23:31:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-08-29 23:31:48,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 227 [2023-08-29 23:31:48,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 4160 transitions, 79305 flow. Second operand has 29 states, 29 states have (on average 84.62068965517241) internal successors, (2454), 29 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states 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 23:31:48,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:31:48,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 227 [2023-08-29 23:31:48,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:33:13,985 INFO L130 PetriNetUnfolder]: 53345/89756 cut-off events. [2023-08-29 23:33:13,985 INFO L131 PetriNetUnfolder]: For 24967420/24967420 co-relation queries the response was YES. [2023-08-29 23:33:17,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946049 conditions, 89756 events. 53345/89756 cut-off events. For 24967420/24967420 co-relation queries the response was YES. Maximal size of possible extension queue 3184. Compared 804453 event pairs, 1806 based on Foata normal form. 5814/95570 useless extension candidates. Maximal degree in co-relation 945836. Up to 21312 conditions per place. [2023-08-29 23:33:17,838 INFO L137 encePairwiseOnDemand]: 216/227 looper letters, 1855 selfloop transitions, 5406 changer transitions 3664/10925 dead transitions. [2023-08-29 23:33:17,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 10925 transitions, 233295 flow [2023-08-29 23:33:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2023-08-29 23:33:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2023-08-29 23:33:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 16352 transitions. [2023-08-29 23:33:17,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38521519941576954 [2023-08-29 23:33:17,851 INFO L72 ComplementDD]: Start complementDD. Operand 187 states and 16352 transitions. [2023-08-29 23:33:17,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 187 states and 16352 transitions. [2023-08-29 23:33:17,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:33:17,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 187 states and 16352 transitions. [2023-08-29 23:33:17,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 188 states, 187 states have (on average 87.44385026737967) internal successors, (16352), 187 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states 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 23:33:17,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 188 states, 188 states have (on average 227.0) internal successors, (42676), 188 states have internal predecessors, (42676), 0 states have call successors, (0), 0 states 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 23:33:17,904 INFO L81 ComplementDD]: Finished complementDD. Result has 188 states, 188 states have (on average 227.0) internal successors, (42676), 188 states have internal predecessors, (42676), 0 states have call successors, (0), 0 states 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 23:33:17,904 INFO L175 Difference]: Start difference. First operand has 633 places, 4160 transitions, 79305 flow. Second operand 187 states and 16352 transitions. [2023-08-29 23:33:17,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 10925 transitions, 233295 flow [2023-08-29 23:38:45,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 10925 transitions, 219589 flow, removed 6694 selfloop flow, removed 76 redundant places. [2023-08-29 23:38:45,432 INFO L231 Difference]: Finished difference. Result has 807 places, 6806 transitions, 141375 flow [2023-08-29 23:38:45,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=227, PETRI_DIFFERENCE_MINUEND_FLOW=75258, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=187, PETRI_FLOW=141375, PETRI_PLACES=807, PETRI_TRANSITIONS=6806} [2023-08-29 23:38:45,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 764 predicate places. [2023-08-29 23:38:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 807 places, 6806 transitions, 141375 flow [2023-08-29 23:38:45,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 84.62068965517241) internal successors, (2454), 29 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states 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 23:38:45,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:38:45,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:38:45,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-29 23:38:45,645 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:38:45,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2096764027, now seen corresponding path program 9 times [2023-08-29 23:38:45,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:38:45,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824010044] [2023-08-29 23:38:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:45,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:38:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:46,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:38:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824010044] [2023-08-29 23:38:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824010044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:38:46,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655752524] [2023-08-29 23:38:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:38:46,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:38:46,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:38:46,249 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:38:46,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 23:38:46,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:38:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:38:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-29 23:38:46,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:38:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655752524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:38:47,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:38:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2023-08-29 23:38:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125576698] [2023-08-29 23:38:47,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:38:47,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:38:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:38:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:38:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:38:47,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 227 [2023-08-29 23:38:47,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 6806 transitions, 141375 flow. Second operand has 30 states, 30 states have (on average 88.36666666666666) internal successors, (2651), 30 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states 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 23:38:47,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:47,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 227 [2023-08-29 23:38:47,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15