./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:21:28,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:21:28,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:21:28,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:21:28,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:21:28,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:21:28,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:21:28,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:21:28,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:21:28,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:21:28,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:21:28,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:21:28,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:21:28,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:21:28,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:21:28,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:21:28,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:21:28,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:21:28,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:21:28,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:21:28,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:21:28,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:21:28,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:21:28,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:21:28,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:21:28,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:21:28,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:21:28,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:21:28,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:21:28,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:21:28,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:21:28,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:21:28,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:21:28,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:21:28,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:21:28,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:21:28,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:21:28,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:21:28,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:21:28,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:21:28,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:21:28,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:21:28,892 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:21:28,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:21:28,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:21:28,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:21:28,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:21:28,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:21:28,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:21:28,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:21:28,896 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:21:28,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:21:28,897 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:21:28,897 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:21:28,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:21:28,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:21:28,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:21:28,898 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:21:28,898 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:21:28,898 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:21:28,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:21:28,899 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:21:28,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:21:28,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:21:28,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:21:28,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:21:28,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:21:28,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:21:28,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:21:28,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:21:28,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:21:28,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:21:28,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:21:28,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:21:28,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:21:28,901 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:21:28,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:21:29,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:21:29,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:21:29,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:21:29,238 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:21:29,238 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:21:29,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 06:21:30,474 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:21:30,696 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:21:30,697 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-30 06:21:30,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c50697ba/ea5cf54b3eca416bb976afaed51fc187/FLAGbe217d105 [2023-08-30 06:21:30,716 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c50697ba/ea5cf54b3eca416bb976afaed51fc187 [2023-08-30 06:21:30,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:21:30,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:21:30,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:21:30,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:21:30,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:21:30,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:30,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3866e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30, skipping insertion in model container [2023-08-30 06:21:30,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:30,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:21:30,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:21:30,897 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/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 06:21:30,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:21:30,909 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:21:30,927 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/popl20-difference-det.wvr.c[2507,2520] [2023-08-30 06:21:30,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:21:30,936 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:21:30,936 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:21:30,942 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:21:30,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30 WrapperNode [2023-08-30 06:21:30,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:21:30,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:21:30,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:21:30,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:21:30,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:30,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:30,997 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-08-30 06:21:30,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:21:30,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:21:30,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:21:31,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:21:31,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:21:31,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:21:31,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:21:31,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:21:31,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (1/1) ... [2023-08-30 06:21:31,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:21:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:31,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:21:31,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:21:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:21:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:21:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:21:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:21:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:21:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 06:21:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 06:21:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 06:21:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:21:31,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 06:21:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:21:31,128 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:21:31,300 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:21:31,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:21:31,564 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:21:31,621 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:21:31,623 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 06:21:31,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:21:31 BoogieIcfgContainer [2023-08-30 06:21:31,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:21:31,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:21:31,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:21:31,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:21:31,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:21:30" (1/3) ... [2023-08-30 06:21:31,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755543fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:21:31, skipping insertion in model container [2023-08-30 06:21:31,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:21:30" (2/3) ... [2023-08-30 06:21:31,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755543fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:21:31, skipping insertion in model container [2023-08-30 06:21:31,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:21:31" (3/3) ... [2023-08-30 06:21:31,641 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-30 06:21:31,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:21:31,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 06:21:31,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:21:31,783 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 06:21:31,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 145 transitions, 322 flow [2023-08-30 06:21:31,887 INFO L130 PetriNetUnfolder]: 9/141 cut-off events. [2023-08-30 06:21:31,887 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:21:31,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 141 events. 9/141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-30 06:21:31,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 145 transitions, 322 flow [2023-08-30 06:21:31,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 137 transitions, 298 flow [2023-08-30 06:21:31,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:21:31,909 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-30 06:21:31,911 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 137 transitions, 298 flow [2023-08-30 06:21:31,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 137 transitions, 298 flow [2023-08-30 06:21:31,940 INFO L130 PetriNetUnfolder]: 9/137 cut-off events. [2023-08-30 06:21:31,943 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 06:21:31,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 137 events. 9/137 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 156 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-30 06:21:31,952 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 06:21:36,040 INFO L134 LiptonReduction]: Checked pairs total: 3417 [2023-08-30 06:21:36,040 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-30 06:21:36,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:21:36,058 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;@2adf34c8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:21:36,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 06:21:36,061 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 06:21:36,061 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:21:36,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:36,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 06:21:36,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:36,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 580, now seen corresponding path program 1 times [2023-08-30 06:21:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:36,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123991604] [2023-08-30 06:21:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:36,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:36,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123991604] [2023-08-30 06:21:36,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123991604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:36,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:36,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 06:21:36,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865919292] [2023-08-30 06:21:36,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:36,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 06:21:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 06:21:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 06:21:36,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 272 [2023-08-30 06:21:36,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:36,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:36,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 272 [2023-08-30 06:21:36,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:36,527 INFO L130 PetriNetUnfolder]: 2524/3163 cut-off events. [2023-08-30 06:21:36,527 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 06:21:36,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 3163 events. 2524/3163 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11409 event pairs, 1182 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 4966. Up to 3134 conditions per place. [2023-08-30 06:21:36,552 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-30 06:21:36,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-30 06:21:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 06:21:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 06:21:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 296 transitions. [2023-08-30 06:21:36,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-08-30 06:21:36,572 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 296 transitions. [2023-08-30 06:21:36,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 296 transitions. [2023-08-30 06:21:36,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:36,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 296 transitions. [2023-08-30 06:21:36,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.0) internal successors, (296), 2 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) [2023-08-30 06:21:36,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:36,586 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:36,587 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 296 transitions. [2023-08-30 06:21:36,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-30 06:21:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 06:21:36,596 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-30 06:21:36,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-30 06:21:36,601 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 06:21:36,601 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-30 06:21:36,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:36,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:36,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:21:36,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 06:21:36,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:36,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:36,609 INFO L85 PathProgramCache]: Analyzing trace with hash 571786, now seen corresponding path program 1 times [2023-08-30 06:21:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:36,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170038002] [2023-08-30 06:21:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:36,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:36,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170038002] [2023-08-30 06:21:36,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170038002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:36,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:36,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176103654] [2023-08-30 06:21:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:36,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:37,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-08-30 06:21:37,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:37,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-08-30 06:21:37,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:37,238 INFO L130 PetriNetUnfolder]: 2413/3022 cut-off events. [2023-08-30 06:21:37,239 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:37,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 3022 events. 2413/3022 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10789 event pairs, 1127 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6054. Up to 2992 conditions per place. [2023-08-30 06:21:37,257 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 06:21:37,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-30 06:21:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-30 06:21:37,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742647058823529 [2023-08-30 06:21:37,259 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-30 06:21:37,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-30 06:21:37,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:37,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-30 06:21:37,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,281 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 387 transitions. [2023-08-30 06:21:37,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-30 06:21:37,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 06:21:37,282 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-30 06:21:37,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 06:21:37,283 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 06:21:37,283 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-30 06:21:37,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:37,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:21:37,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 06:21:37,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:37,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash 571787, now seen corresponding path program 1 times [2023-08-30 06:21:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:37,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466035046] [2023-08-30 06:21:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:37,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:37,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466035046] [2023-08-30 06:21:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466035046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:37,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:37,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106752617] [2023-08-30 06:21:37,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:37,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 06:21:37,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:37,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 06:21:37,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:37,647 INFO L130 PetriNetUnfolder]: 2302/2881 cut-off events. [2023-08-30 06:21:37,647 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:37,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 2881 events. 2302/2881 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10153 event pairs, 1072 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 5773. Up to 2851 conditions per place. [2023-08-30 06:21:37,663 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 06:21:37,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-30 06:21:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 06:21:37,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49387254901960786 [2023-08-30 06:21:37,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 06:21:37,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 06:21:37,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:37,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 06:21:37,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,669 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 403 transitions. [2023-08-30 06:21:37,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-30 06:21:37,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:37,671 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-30 06:21:37,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-30 06:21:37,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-08-30 06:21:37,672 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-30 06:21:37,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:37,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:21:37,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 06:21:37,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:37,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash 549501602, now seen corresponding path program 1 times [2023-08-30 06:21:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:37,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411697783] [2023-08-30 06:21:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:37,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411697783] [2023-08-30 06:21:37,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411697783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:37,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470169522] [2023-08-30 06:21:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:37,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 06:21:37,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:37,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:37,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 06:21:37,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:37,989 INFO L130 PetriNetUnfolder]: 2256/2817 cut-off events. [2023-08-30 06:21:37,989 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:37,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 2817 events. 2256/2817 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9859 event pairs, 1050 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 5646. Up to 2787 conditions per place. [2023-08-30 06:21:38,005 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 06:21:38,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-30 06:21:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-30 06:21:38,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142156862745096 [2023-08-30 06:21:38,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-30 06:21:38,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-30 06:21:38,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:38,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-30 06:21:38,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,011 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 401 transitions. [2023-08-30 06:21:38,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-30 06:21:38,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:38,013 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-30 06:21:38,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-30 06:21:38,013 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-08-30 06:21:38,014 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-30 06:21:38,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:38,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:21:38,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 06:21:38,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:38,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash 549501601, now seen corresponding path program 1 times [2023-08-30 06:21:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:38,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650675207] [2023-08-30 06:21:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:38,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650675207] [2023-08-30 06:21:38,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650675207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:38,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:38,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125920469] [2023-08-30 06:21:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:38,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:38,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-08-30 06:21:38,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:38,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-08-30 06:21:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:38,317 INFO L130 PetriNetUnfolder]: 2210/2753 cut-off events. [2023-08-30 06:21:38,317 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:38,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 2753 events. 2210/2753 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9590 event pairs, 1028 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 5519. Up to 2723 conditions per place. [2023-08-30 06:21:38,334 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 06:21:38,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-30 06:21:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-30 06:21:38,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46691176470588236 [2023-08-30 06:21:38,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-30 06:21:38,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-30 06:21:38,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:38,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-30 06:21:38,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,340 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 381 transitions. [2023-08-30 06:21:38,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-30 06:21:38,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:38,342 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-30 06:21:38,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 06:21:38,342 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 06:21:38,343 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-30 06:21:38,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:38,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:38,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 06:21:38,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:38,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -209926295, now seen corresponding path program 1 times [2023-08-30 06:21:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:38,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921064587] [2023-08-30 06:21:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:38,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921064587] [2023-08-30 06:21:38,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921064587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:38,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:38,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884742689] [2023-08-30 06:21:38,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:38,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:38,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 06:21:38,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:38,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 06:21:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:38,653 INFO L130 PetriNetUnfolder]: 2107/2620 cut-off events. [2023-08-30 06:21:38,653 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 2620 events. 2107/2620 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9003 event pairs, 981 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 5254. Up to 2590 conditions per place. [2023-08-30 06:21:38,670 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 06:21:38,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-30 06:21:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-30 06:21:38,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2023-08-30 06:21:38,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-30 06:21:38,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-30 06:21:38,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:38,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-30 06:21:38,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,678 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 397 transitions. [2023-08-30 06:21:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-30 06:21:38,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:38,680 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-30 06:21:38,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-30 06:21:38,684 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-08-30 06:21:38,684 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-30 06:21:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:38,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:38,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 06:21:38,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:38,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:38,686 INFO L85 PathProgramCache]: Analyzing trace with hash -209926294, now seen corresponding path program 1 times [2023-08-30 06:21:38,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:38,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179800302] [2023-08-30 06:21:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:38,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:38,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:38,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179800302] [2023-08-30 06:21:38,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179800302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:38,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:38,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:38,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929916050] [2023-08-30 06:21:38,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:38,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:38,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:38,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 272 [2023-08-30 06:21:38,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:38,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 272 [2023-08-30 06:21:38,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:38,957 INFO L130 PetriNetUnfolder]: 2004/2487 cut-off events. [2023-08-30 06:21:38,957 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:38,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 2487 events. 2004/2487 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8420 event pairs, 934 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 4989. Up to 2457 conditions per place. [2023-08-30 06:21:38,967 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 06:21:38,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-30 06:21:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-30 06:21:38,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46200980392156865 [2023-08-30 06:21:38,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-30 06:21:38,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-30 06:21:38,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:38,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-30 06:21:38,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,972 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 377 transitions. [2023-08-30 06:21:38,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-30 06:21:38,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:38,974 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-30 06:21:38,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-30 06:21:38,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 06:21:38,974 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-30 06:21:38,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:38,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:38,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:38,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 06:21:38,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:38,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash 124305830, now seen corresponding path program 1 times [2023-08-30 06:21:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:38,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407723601] [2023-08-30 06:21:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:38,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:39,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:39,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407723601] [2023-08-30 06:21:39,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407723601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:39,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:39,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 06:21:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515415388] [2023-08-30 06:21:39,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:39,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:21:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:21:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:21:39,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 272 [2023-08-30 06:21:39,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 6 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:39,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 272 [2023-08-30 06:21:39,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:39,333 INFO L130 PetriNetUnfolder]: 1590/1992 cut-off events. [2023-08-30 06:21:39,333 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:39,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1992 events. 1590/1992 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6624 event pairs, 736 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 4000. Up to 1962 conditions per place. [2023-08-30 06:21:39,344 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 06:21:39,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-30 06:21:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-30 06:21:39,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2023-08-30 06:21:39,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-30 06:21:39,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-30 06:21:39,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:39,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-30 06:21:39,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,350 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 339 transitions. [2023-08-30 06:21:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-30 06:21:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:39,351 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-30 06:21:39,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 06:21:39,354 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 06:21:39,354 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-30 06:21:39,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:39,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:39,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 06:21:39,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:39,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 124305831, now seen corresponding path program 1 times [2023-08-30 06:21:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821073081] [2023-08-30 06:21:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:39,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:39,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821073081] [2023-08-30 06:21:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821073081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:39,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:39,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797699545] [2023-08-30 06:21:39,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:39,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:39,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:39,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 272 [2023-08-30 06:21:39,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:39,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 272 [2023-08-30 06:21:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:39,724 INFO L130 PetriNetUnfolder]: 1176/1497 cut-off events. [2023-08-30 06:21:39,725 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 06:21:39,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3015 conditions, 1497 events. 1176/1497 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4863 event pairs, 538 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 3011. Up to 1467 conditions per place. [2023-08-30 06:21:39,730 INFO L137 encePairwiseOnDemand]: 270/272 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 06:21:39,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-30 06:21:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-30 06:21:39,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2023-08-30 06:21:39,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-30 06:21:39,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-30 06:21:39,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:39,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-30 06:21:39,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,735 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 392 transitions. [2023-08-30 06:21:39,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-30 06:21:39,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:39,736 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-30 06:21:39,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 06:21:39,737 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 06:21:39,737 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-30 06:21:39,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:39,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 06:21:39,738 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:39,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash 32800811, now seen corresponding path program 1 times [2023-08-30 06:21:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246625632] [2023-08-30 06:21:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246625632] [2023-08-30 06:21:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246625632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:21:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642251092] [2023-08-30 06:21:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:21:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:21:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:21:39,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-30 06:21:39,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:39,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:39,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-30 06:21:39,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:40,026 INFO L130 PetriNetUnfolder]: 1537/1954 cut-off events. [2023-08-30 06:21:40,026 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 06:21:40,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6401 event pairs, 141 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-08-30 06:21:40,036 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-30 06:21:40,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-08-30 06:21:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:21:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:21:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-30 06:21:40,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2023-08-30 06:21:40,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-30 06:21:40,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-30 06:21:40,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:40,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-30 06:21:40,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,042 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 423 transitions. [2023-08-30 06:21:40,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-08-30 06:21:40,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:40,044 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-08-30 06:21:40,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 06:21:40,044 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 06:21:40,044 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-08-30 06:21:40,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:40,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:40,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 06:21:40,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:40,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:40,046 INFO L85 PathProgramCache]: Analyzing trace with hash -63029285, now seen corresponding path program 1 times [2023-08-30 06:21:40,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:40,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860311625] [2023-08-30 06:21:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:40,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:40,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:40,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860311625] [2023-08-30 06:21:40,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860311625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:40,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:40,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:21:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455669507] [2023-08-30 06:21:40,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:21:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:21:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:21:40,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-08-30 06:21:40,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:40,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-08-30 06:21:40,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:40,461 INFO L130 PetriNetUnfolder]: 2315/3045 cut-off events. [2023-08-30 06:21:40,461 INFO L131 PetriNetUnfolder]: For 844/844 co-relation queries the response was YES. [2023-08-30 06:21:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7475 conditions, 3045 events. 2315/3045 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12248 event pairs, 620 based on Foata normal form. 34/3049 useless extension candidates. Maximal degree in co-relation 7470. Up to 1705 conditions per place. [2023-08-30 06:21:40,478 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 80 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2023-08-30 06:21:40,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 87 transitions, 442 flow [2023-08-30 06:21:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 669 transitions. [2023-08-30 06:21:40,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4919117647058823 [2023-08-30 06:21:40,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 669 transitions. [2023-08-30 06:21:40,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 669 transitions. [2023-08-30 06:21:40,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:40,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 669 transitions. [2023-08-30 06:21:40,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,485 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 669 transitions. [2023-08-30 06:21:40,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 87 transitions, 442 flow [2023-08-30 06:21:40,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 87 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:40,488 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 137 flow [2023-08-30 06:21:40,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-08-30 06:21:40,489 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-30 06:21:40,489 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 137 flow [2023-08-30 06:21:40,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:40,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:40,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 06:21:40,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:40,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 241380879, now seen corresponding path program 1 times [2023-08-30 06:21:40,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:40,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838288472] [2023-08-30 06:21:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:40,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838288472] [2023-08-30 06:21:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838288472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120899866] [2023-08-30 06:21:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:40,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:21:40,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 06:21:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:40,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:40,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120899866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:40,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:40,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 06:21:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712122740] [2023-08-30 06:21:40,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:21:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:21:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:21:40,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:40,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 137 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:40,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:40,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:40,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:41,263 INFO L130 PetriNetUnfolder]: 3231/4291 cut-off events. [2023-08-30 06:21:41,263 INFO L131 PetriNetUnfolder]: For 3518/3899 co-relation queries the response was YES. [2023-08-30 06:21:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 4291 events. 3231/4291 cut-off events. For 3518/3899 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19750 event pairs, 339 based on Foata normal form. 477/4675 useless extension candidates. Maximal degree in co-relation 11985. Up to 1856 conditions per place. [2023-08-30 06:21:41,290 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 89 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-08-30 06:21:41,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 97 transitions, 540 flow [2023-08-30 06:21:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-30 06:21:41,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-08-30 06:21:41,292 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-30 06:21:41,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-30 06:21:41,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:41,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-30 06:21:41,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:41,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:41,296 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:41,297 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 137 flow. Second operand 5 states and 665 transitions. [2023-08-30 06:21:41,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 97 transitions, 540 flow [2023-08-30 06:21:41,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 97 transitions, 521 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:41,305 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 167 flow [2023-08-30 06:21:41,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-30 06:21:41,306 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-08-30 06:21:41,306 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 167 flow [2023-08-30 06:21:41,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:41,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:41,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:41,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 06:21:41,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 06:21:41,514 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:41,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash -921950725, now seen corresponding path program 2 times [2023-08-30 06:21:41,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:41,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194054705] [2023-08-30 06:21:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:41,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:41,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:41,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194054705] [2023-08-30 06:21:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194054705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:41,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:41,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:21:41,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622752016] [2023-08-30 06:21:41,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:21:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:21:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:21:41,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-08-30 06:21:41,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:41,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:41,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-08-30 06:21:41,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:42,159 INFO L130 PetriNetUnfolder]: 4823/6498 cut-off events. [2023-08-30 06:21:42,159 INFO L131 PetriNetUnfolder]: For 8653/9187 co-relation queries the response was YES. [2023-08-30 06:21:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 6498 events. 4823/6498 cut-off events. For 8653/9187 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31847 event pairs, 1245 based on Foata normal form. 571/6979 useless extension candidates. Maximal degree in co-relation 19883. Up to 3423 conditions per place. [2023-08-30 06:21:42,198 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 95 selfloop transitions, 7 changer transitions 0/105 dead transitions. [2023-08-30 06:21:42,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 105 transitions, 630 flow [2023-08-30 06:21:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-30 06:21:42,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948529411764706 [2023-08-30 06:21:42,201 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-30 06:21:42,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-30 06:21:42,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:42,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-30 06:21:42,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:42,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:42,206 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:42,206 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 167 flow. Second operand 5 states and 673 transitions. [2023-08-30 06:21:42,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 105 transitions, 630 flow [2023-08-30 06:21:42,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 625 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:42,219 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 211 flow [2023-08-30 06:21:42,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-30 06:21:42,219 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2023-08-30 06:21:42,220 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 211 flow [2023-08-30 06:21:42,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:42,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:42,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:42,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 06:21:42,220 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:42,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 550245957, now seen corresponding path program 2 times [2023-08-30 06:21:42,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:42,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789121079] [2023-08-30 06:21:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:42,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:42,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789121079] [2023-08-30 06:21:42,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789121079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243420220] [2023-08-30 06:21:42,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:21:42,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:42,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:42,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:21:42,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 06:21:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:21:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:42,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:42,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:42,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:42,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243420220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:42,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:42,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 06:21:42,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332803996] [2023-08-30 06:21:42,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:42,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:21:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:21:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:21:42,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:42,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:42,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:42,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:42,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:43,310 INFO L130 PetriNetUnfolder]: 6729/9130 cut-off events. [2023-08-30 06:21:43,311 INFO L131 PetriNetUnfolder]: For 17455/18932 co-relation queries the response was YES. [2023-08-30 06:21:43,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31362 conditions, 9130 events. 6729/9130 cut-off events. For 17455/18932 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47787 event pairs, 883 based on Foata normal form. 1627/10614 useless extension candidates. Maximal degree in co-relation 31348. Up to 3720 conditions per place. [2023-08-30 06:21:43,405 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 101 selfloop transitions, 6 changer transitions 0/111 dead transitions. [2023-08-30 06:21:43,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 756 flow [2023-08-30 06:21:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-08-30 06:21:43,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-30 06:21:43,408 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-08-30 06:21:43,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-08-30 06:21:43,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:43,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-08-30 06:21:43,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:43,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:43,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:43,412 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 211 flow. Second operand 5 states and 663 transitions. [2023-08-30 06:21:43,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 756 flow [2023-08-30 06:21:43,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 716 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:43,429 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 242 flow [2023-08-30 06:21:43,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-30 06:21:43,430 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-30 06:21:43,430 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 242 flow [2023-08-30 06:21:43,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 120.75) internal successors, (966), 8 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:43,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:43,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 06:21:43,636 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,SelfDestructingSolverStorable13 [2023-08-30 06:21:43,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:43,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1393353835, now seen corresponding path program 3 times [2023-08-30 06:21:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844580403] [2023-08-30 06:21:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:43,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:43,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844580403] [2023-08-30 06:21:43,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844580403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:43,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716334385] [2023-08-30 06:21:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:21:43,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:43,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:21:43,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 06:21:43,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:21:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:43,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:43,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716334385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:43,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:43,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 06:21:43,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689438917] [2023-08-30 06:21:43,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:43,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:21:43,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:43,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:21:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:21:43,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:43,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:43,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:43,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:43,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:45,234 INFO L130 PetriNetUnfolder]: 8827/11997 cut-off events. [2023-08-30 06:21:45,234 INFO L131 PetriNetUnfolder]: For 30624/32500 co-relation queries the response was YES. [2023-08-30 06:21:45,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42694 conditions, 11997 events. 8827/11997 cut-off events. For 30624/32500 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 66009 event pairs, 1277 based on Foata normal form. 1998/13734 useless extension candidates. Maximal degree in co-relation 42677. Up to 4818 conditions per place. [2023-08-30 06:21:45,327 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 162 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2023-08-30 06:21:45,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 180 transitions, 1220 flow [2023-08-30 06:21:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:21:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:21:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1067 transitions. [2023-08-30 06:21:45,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49034926470588236 [2023-08-30 06:21:45,331 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1067 transitions. [2023-08-30 06:21:45,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1067 transitions. [2023-08-30 06:21:45,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:45,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1067 transitions. [2023-08-30 06:21:45,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 133.375) internal successors, (1067), 8 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:45,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:45,337 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:45,337 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 242 flow. Second operand 8 states and 1067 transitions. [2023-08-30 06:21:45,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 180 transitions, 1220 flow [2023-08-30 06:21:45,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 180 transitions, 1204 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:45,360 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 352 flow [2023-08-30 06:21:45,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=352, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2023-08-30 06:21:45,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2023-08-30 06:21:45,361 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 352 flow [2023-08-30 06:21:45,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:45,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:45,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:45,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 06:21:45,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:45,567 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:45,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 97335621, now seen corresponding path program 3 times [2023-08-30 06:21:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:45,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518132074] [2023-08-30 06:21:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:45,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:45,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:45,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518132074] [2023-08-30 06:21:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518132074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419909780] [2023-08-30 06:21:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:21:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:45,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:21:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 06:21:45,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:21:45,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:45,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:45,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419909780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:45,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:45,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 06:21:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515584891] [2023-08-30 06:21:45,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:45,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:21:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:21:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:21:45,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:45,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 352 flow. Second operand has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:45,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:45,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:45,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:47,351 INFO L130 PetriNetUnfolder]: 13654/18446 cut-off events. [2023-08-30 06:21:47,351 INFO L131 PetriNetUnfolder]: For 63489/68123 co-relation queries the response was YES. [2023-08-30 06:21:47,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71449 conditions, 18446 events. 13654/18446 cut-off events. For 63489/68123 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 103635 event pairs, 1256 based on Foata normal form. 2378/20468 useless extension candidates. Maximal degree in co-relation 71428. Up to 7661 conditions per place. [2023-08-30 06:21:47,606 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 195 selfloop transitions, 14 changer transitions 0/214 dead transitions. [2023-08-30 06:21:47,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 214 transitions, 1795 flow [2023-08-30 06:21:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 06:21:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 06:21:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1061 transitions. [2023-08-30 06:21:47,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875919117647059 [2023-08-30 06:21:47,615 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1061 transitions. [2023-08-30 06:21:47,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1061 transitions. [2023-08-30 06:21:47,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:47,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1061 transitions. [2023-08-30 06:21:47,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.625) internal successors, (1061), 8 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:47,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:47,627 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 272.0) internal successors, (2448), 9 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:47,628 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 352 flow. Second operand 8 states and 1061 transitions. [2023-08-30 06:21:47,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 214 transitions, 1795 flow [2023-08-30 06:21:47,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 214 transitions, 1675 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-08-30 06:21:47,696 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 438 flow [2023-08-30 06:21:47,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2023-08-30 06:21:47,697 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2023-08-30 06:21:47,697 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 438 flow [2023-08-30 06:21:47,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:47,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:47,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:47,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 06:21:47,903 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,SelfDestructingSolverStorable15 [2023-08-30 06:21:47,904 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:47,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1620542779, now seen corresponding path program 4 times [2023-08-30 06:21:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619672191] [2023-08-30 06:21:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:47,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619672191] [2023-08-30 06:21:47,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619672191] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187273859] [2023-08-30 06:21:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:21:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:47,984 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) [2023-08-30 06:21:47,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 06:21:48,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:21:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:48,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:48,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187273859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:48,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:48,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 06:21:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440026661] [2023-08-30 06:21:48,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:48,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:21:48,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:21:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:21:48,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:48,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:48,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:48,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:48,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:49,636 INFO L130 PetriNetUnfolder]: 13244/17949 cut-off events. [2023-08-30 06:21:49,637 INFO L131 PetriNetUnfolder]: For 76286/80676 co-relation queries the response was YES. [2023-08-30 06:21:49,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74000 conditions, 17949 events. 13244/17949 cut-off events. For 76286/80676 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 100990 event pairs, 3032 based on Foata normal form. 2130/19585 useless extension candidates. Maximal degree in co-relation 73975. Up to 7964 conditions per place. [2023-08-30 06:21:49,739 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 129 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2023-08-30 06:21:49,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 151 transitions, 1310 flow [2023-08-30 06:21:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:49,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-30 06:21:49,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2023-08-30 06:21:49,741 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-30 06:21:49,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-30 06:21:49,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:49,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-30 06:21:49,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:49,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:49,745 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:49,745 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 438 flow. Second operand 5 states and 670 transitions. [2023-08-30 06:21:49,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 151 transitions, 1310 flow [2023-08-30 06:21:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 151 transitions, 1232 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 06:21:49,851 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 528 flow [2023-08-30 06:21:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2023-08-30 06:21:49,851 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2023-08-30 06:21:49,852 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 528 flow [2023-08-30 06:21:49,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.7) internal successors, (1207), 10 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:49,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:49,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:49,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:21:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 06:21:50,057 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:50,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1130502097, now seen corresponding path program 4 times [2023-08-30 06:21:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967633155] [2023-08-30 06:21:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967633155] [2023-08-30 06:21:50,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967633155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:50,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941156278] [2023-08-30 06:21:50,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:21:50,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:50,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:50,145 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) [2023-08-30 06:21:50,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 06:21:50,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:21:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:21:50,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:50,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:50,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:50,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941156278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:50,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:50,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 06:21:50,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009441293] [2023-08-30 06:21:50,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:50,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:21:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:21:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:21:50,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:50,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 528 flow. Second operand has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:50,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:50,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:50,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:51,865 INFO L130 PetriNetUnfolder]: 12879/17695 cut-off events. [2023-08-30 06:21:51,865 INFO L131 PetriNetUnfolder]: For 73467/77835 co-relation queries the response was YES. [2023-08-30 06:21:51,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74803 conditions, 17695 events. 12879/17695 cut-off events. For 73467/77835 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 100026 event pairs, 3258 based on Foata normal form. 2208/19585 useless extension candidates. Maximal degree in co-relation 74775. Up to 8766 conditions per place. [2023-08-30 06:21:52,026 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 138 selfloop transitions, 17 changer transitions 0/161 dead transitions. [2023-08-30 06:21:52,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 161 transitions, 1553 flow [2023-08-30 06:21:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-30 06:21:52,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2023-08-30 06:21:52,029 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-30 06:21:52,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-30 06:21:52,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:52,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-30 06:21:52,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,045 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,045 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 528 flow. Second operand 5 states and 664 transitions. [2023-08-30 06:21:52,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 161 transitions, 1553 flow [2023-08-30 06:21:52,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 161 transitions, 1466 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:52,195 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 619 flow [2023-08-30 06:21:52,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=619, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-08-30 06:21:52,195 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2023-08-30 06:21:52,195 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 619 flow [2023-08-30 06:21:52,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.5) internal successors, (1205), 10 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:52,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 06:21:52,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 06:21:52,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:52,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 2056442747, now seen corresponding path program 5 times [2023-08-30 06:21:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350410008] [2023-08-30 06:21:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:52,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350410008] [2023-08-30 06:21:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350410008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:52,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:52,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:21:52,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217180726] [2023-08-30 06:21:52,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:21:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:21:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:21:52,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:21:52,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 619 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:52,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:52,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:21:52,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:53,977 INFO L130 PetriNetUnfolder]: 11934/16360 cut-off events. [2023-08-30 06:21:53,977 INFO L131 PetriNetUnfolder]: For 83443/87431 co-relation queries the response was YES. [2023-08-30 06:21:54,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71623 conditions, 16360 events. 11934/16360 cut-off events. For 83443/87431 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 92987 event pairs, 2718 based on Foata normal form. 1860/17813 useless extension candidates. Maximal degree in co-relation 71592. Up to 9074 conditions per place. [2023-08-30 06:21:54,118 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 179 selfloop transitions, 16 changer transitions 0/201 dead transitions. [2023-08-30 06:21:54,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 201 transitions, 1989 flow [2023-08-30 06:21:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:21:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:21:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 803 transitions. [2023-08-30 06:21:54,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49203431372549017 [2023-08-30 06:21:54,121 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 803 transitions. [2023-08-30 06:21:54,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 803 transitions. [2023-08-30 06:21:54,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:54,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 803 transitions. [2023-08-30 06:21:54,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.83333333333334) internal successors, (803), 6 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,126 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,126 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 619 flow. Second operand 6 states and 803 transitions. [2023-08-30 06:21:54,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 201 transitions, 1989 flow [2023-08-30 06:21:54,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 201 transitions, 1876 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-08-30 06:21:54,287 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 674 flow [2023-08-30 06:21:54,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-08-30 06:21:54,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2023-08-30 06:21:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 674 flow [2023-08-30 06:21:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:54,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 06:21:54,289 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:54,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 962061305, now seen corresponding path program 1 times [2023-08-30 06:21:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:54,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938866237] [2023-08-30 06:21:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:54,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:54,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938866237] [2023-08-30 06:21:54,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938866237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:21:54,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170163722] [2023-08-30 06:21:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:54,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:54,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:21:54,357 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) [2023-08-30 06:21:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 06:21:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:54,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:21:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:21:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:54,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:21:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:54,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170163722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:21:54,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:21:54,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 06:21:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971082320] [2023-08-30 06:21:54,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:21:54,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:21:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:21:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:21:54,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:21:54,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 674 flow. Second operand has 8 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:54,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:54,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:21:54,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:56,030 INFO L130 PetriNetUnfolder]: 12571/17111 cut-off events. [2023-08-30 06:21:56,030 INFO L131 PetriNetUnfolder]: For 84743/89371 co-relation queries the response was YES. [2023-08-30 06:21:56,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76924 conditions, 17111 events. 12571/17111 cut-off events. For 84743/89371 co-relation queries the response was YES. Maximal size of possible extension queue 1064. Compared 96979 event pairs, 1276 based on Foata normal form. 2178/18934 useless extension candidates. Maximal degree in co-relation 76891. Up to 8878 conditions per place. [2023-08-30 06:21:56,283 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 141 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2023-08-30 06:21:56,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1624 flow [2023-08-30 06:21:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 657 transitions. [2023-08-30 06:21:56,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48308823529411765 [2023-08-30 06:21:56,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 657 transitions. [2023-08-30 06:21:56,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 657 transitions. [2023-08-30 06:21:56,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:56,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 657 transitions. [2023-08-30 06:21:56,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:56,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:56,288 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:56,289 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 674 flow. Second operand 5 states and 657 transitions. [2023-08-30 06:21:56,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1624 flow [2023-08-30 06:21:56,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1568 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 06:21:56,488 INFO L231 Difference]: Finished difference. Result has 101 places, 79 transitions, 700 flow [2023-08-30 06:21:56,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=700, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2023-08-30 06:21:56,488 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2023-08-30 06:21:56,488 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 700 flow [2023-08-30 06:21:56,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.375) internal successors, (971), 8 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:56,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:56,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:56,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:21:56,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:21:56,697 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:56,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1080256256, now seen corresponding path program 1 times [2023-08-30 06:21:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:56,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280915739] [2023-08-30 06:21:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:56,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:56,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:56,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280915739] [2023-08-30 06:21:56,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280915739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:56,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:56,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:21:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201852529] [2023-08-30 06:21:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:21:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:21:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:21:56,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 272 [2023-08-30 06:21:56,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 700 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:56,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:56,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 272 [2023-08-30 06:21:56,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:21:58,327 INFO L130 PetriNetUnfolder]: 13307/18167 cut-off events. [2023-08-30 06:21:58,327 INFO L131 PetriNetUnfolder]: For 99103/105226 co-relation queries the response was YES. [2023-08-30 06:21:58,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83406 conditions, 18167 events. 13307/18167 cut-off events. For 99103/105226 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 102343 event pairs, 1302 based on Foata normal form. 3136/21050 useless extension candidates. Maximal degree in co-relation 83371. Up to 8763 conditions per place. [2023-08-30 06:21:58,479 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 150 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2023-08-30 06:21:58,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 173 transitions, 1825 flow [2023-08-30 06:21:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:21:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:21:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-30 06:21:58,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-08-30 06:21:58,481 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-30 06:21:58,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-30 06:21:58,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:21:58,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-30 06:21:58,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:58,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:58,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:58,485 INFO L175 Difference]: Start difference. First operand has 101 places, 79 transitions, 700 flow. Second operand 5 states and 665 transitions. [2023-08-30 06:21:58,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 173 transitions, 1825 flow [2023-08-30 06:21:58,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 173 transitions, 1771 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 06:21:58,660 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 746 flow [2023-08-30 06:21:58,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2023-08-30 06:21:58,661 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2023-08-30 06:21:58,661 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 746 flow [2023-08-30 06:21:58,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:58,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:21:58,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:21:58,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 06:21:58,662 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:21:58,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:21:58,662 INFO L85 PathProgramCache]: Analyzing trace with hash -337942745, now seen corresponding path program 2 times [2023-08-30 06:21:58,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:21:58,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764871074] [2023-08-30 06:21:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:21:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:21:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:21:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:21:58,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:21:58,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764871074] [2023-08-30 06:21:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764871074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:21:58,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:21:58,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:21:58,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594347574] [2023-08-30 06:21:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:21:58,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:21:58,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:21:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:21:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:21:58,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:21:58,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 746 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:21:58,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:21:58,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:21:58,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:00,455 INFO L130 PetriNetUnfolder]: 13076/17848 cut-off events. [2023-08-30 06:22:00,455 INFO L131 PetriNetUnfolder]: For 117216/122833 co-relation queries the response was YES. [2023-08-30 06:22:00,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85583 conditions, 17848 events. 13076/17848 cut-off events. For 117216/122833 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 100475 event pairs, 4262 based on Foata normal form. 2311/19669 useless extension candidates. Maximal degree in co-relation 85546. Up to 9470 conditions per place. [2023-08-30 06:22:00,582 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 153 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2023-08-30 06:22:00,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1850 flow [2023-08-30 06:22:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:22:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:22:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-08-30 06:22:00,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933823529411765 [2023-08-30 06:22:00,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-08-30 06:22:00,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-08-30 06:22:00,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:00,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-08-30 06:22:00,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,587 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,587 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 746 flow. Second operand 5 states and 671 transitions. [2023-08-30 06:22:00,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1850 flow [2023-08-30 06:22:00,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1790 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 06:22:00,813 INFO L231 Difference]: Finished difference. Result has 108 places, 82 transitions, 771 flow [2023-08-30 06:22:00,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=771, PETRI_PLACES=108, PETRI_TRANSITIONS=82} [2023-08-30 06:22:00,813 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2023-08-30 06:22:00,813 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 82 transitions, 771 flow [2023-08-30 06:22:00,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:00,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:00,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 06:22:00,814 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:00,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash -310657047, now seen corresponding path program 5 times [2023-08-30 06:22:00,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:00,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058188990] [2023-08-30 06:22:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:00,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:00,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:00,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058188990] [2023-08-30 06:22:00,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058188990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:00,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:00,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:22:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128302461] [2023-08-30 06:22:00,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:22:00,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:22:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:22:00,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:22:00,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 82 transitions, 771 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:00,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:00,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:22:00,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:02,748 INFO L130 PetriNetUnfolder]: 13240/18025 cut-off events. [2023-08-30 06:22:02,748 INFO L131 PetriNetUnfolder]: For 107966/113800 co-relation queries the response was YES. [2023-08-30 06:22:02,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87781 conditions, 18025 events. 13240/18025 cut-off events. For 107966/113800 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 101564 event pairs, 3579 based on Foata normal form. 3087/20892 useless extension candidates. Maximal degree in co-relation 87743. Up to 10187 conditions per place. [2023-08-30 06:22:02,873 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 198 selfloop transitions, 18 changer transitions 2/226 dead transitions. [2023-08-30 06:22:02,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 226 transitions, 2455 flow [2023-08-30 06:22:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:22:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:22:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 799 transitions. [2023-08-30 06:22:02,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2023-08-30 06:22:02,875 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 799 transitions. [2023-08-30 06:22:02,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 799 transitions. [2023-08-30 06:22:02,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:02,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 799 transitions. [2023-08-30 06:22:02,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.16666666666666) internal successors, (799), 6 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:02,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:02,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:02,879 INFO L175 Difference]: Start difference. First operand has 108 places, 82 transitions, 771 flow. Second operand 6 states and 799 transitions. [2023-08-30 06:22:02,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 226 transitions, 2455 flow [2023-08-30 06:22:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 226 transitions, 2377 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-30 06:22:03,058 INFO L231 Difference]: Finished difference. Result has 113 places, 86 transitions, 841 flow [2023-08-30 06:22:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=841, PETRI_PLACES=113, PETRI_TRANSITIONS=86} [2023-08-30 06:22:03,058 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2023-08-30 06:22:03,059 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 86 transitions, 841 flow [2023-08-30 06:22:03,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:03,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:03,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:03,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 06:22:03,059 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:03,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1902105510, now seen corresponding path program 2 times [2023-08-30 06:22:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845118968] [2023-08-30 06:22:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:03,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:03,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845118968] [2023-08-30 06:22:03,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845118968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:03,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998263874] [2023-08-30 06:22:03,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:22:03,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:03,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:03,123 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) [2023-08-30 06:22:03,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 06:22:03,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:22:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:22:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:03,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998263874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:03,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:03,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-30 06:22:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990737803] [2023-08-30 06:22:03,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 06:22:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 06:22:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-30 06:22:03,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:22:03,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 86 transitions, 841 flow. Second operand has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:03,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:03,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:22:03,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:05,325 INFO L130 PetriNetUnfolder]: 13852/18860 cut-off events. [2023-08-30 06:22:05,325 INFO L131 PetriNetUnfolder]: For 127015/133024 co-relation queries the response was YES. [2023-08-30 06:22:05,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97917 conditions, 18860 events. 13852/18860 cut-off events. For 127015/133024 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 105202 event pairs, 3847 based on Foata normal form. 3068/21698 useless extension candidates. Maximal degree in co-relation 97877. Up to 10375 conditions per place. [2023-08-30 06:22:05,464 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 165 selfloop transitions, 16 changer transitions 0/189 dead transitions. [2023-08-30 06:22:05,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 189 transitions, 2054 flow [2023-08-30 06:22:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:22:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:22:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 662 transitions. [2023-08-30 06:22:05,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48676470588235293 [2023-08-30 06:22:05,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 662 transitions. [2023-08-30 06:22:05,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 662 transitions. [2023-08-30 06:22:05,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:05,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 662 transitions. [2023-08-30 06:22:05,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.4) internal successors, (662), 5 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:05,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:05,470 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:05,470 INFO L175 Difference]: Start difference. First operand has 113 places, 86 transitions, 841 flow. Second operand 5 states and 662 transitions. [2023-08-30 06:22:05,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 189 transitions, 2054 flow [2023-08-30 06:22:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 189 transitions, 1998 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 06:22:05,741 INFO L231 Difference]: Finished difference. Result has 115 places, 87 transitions, 838 flow [2023-08-30 06:22:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=838, PETRI_PLACES=115, PETRI_TRANSITIONS=87} [2023-08-30 06:22:05,742 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-08-30 06:22:05,742 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 87 transitions, 838 flow [2023-08-30 06:22:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:05,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:05,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:22:05,942 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,SelfDestructingSolverStorable23 [2023-08-30 06:22:05,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:05,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1172883442, now seen corresponding path program 3 times [2023-08-30 06:22:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458791983] [2023-08-30 06:22:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:06,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:06,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458791983] [2023-08-30 06:22:06,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458791983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:06,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:06,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:22:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835516161] [2023-08-30 06:22:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:22:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:22:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:22:06,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:22:06,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 87 transitions, 838 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:06,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:06,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:22:06,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:07,780 INFO L130 PetriNetUnfolder]: 13170/17913 cut-off events. [2023-08-30 06:22:07,780 INFO L131 PetriNetUnfolder]: For 119316/125003 co-relation queries the response was YES. [2023-08-30 06:22:07,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 17913 events. 13170/17913 cut-off events. For 119316/125003 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 99280 event pairs, 3661 based on Foata normal form. 3035/20701 useless extension candidates. Maximal degree in co-relation 92292. Up to 10316 conditions per place. [2023-08-30 06:22:07,917 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 181 selfloop transitions, 22 changer transitions 4/215 dead transitions. [2023-08-30 06:22:07,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 215 transitions, 2328 flow [2023-08-30 06:22:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:22:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:22:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 794 transitions. [2023-08-30 06:22:07,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48651960784313725 [2023-08-30 06:22:07,919 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 794 transitions. [2023-08-30 06:22:07,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 794 transitions. [2023-08-30 06:22:07,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:07,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 794 transitions. [2023-08-30 06:22:07,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 132.33333333333334) internal successors, (794), 6 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:07,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:07,923 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:07,923 INFO L175 Difference]: Start difference. First operand has 115 places, 87 transitions, 838 flow. Second operand 6 states and 794 transitions. [2023-08-30 06:22:07,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 215 transitions, 2328 flow [2023-08-30 06:22:08,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 215 transitions, 2300 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-30 06:22:08,328 INFO L231 Difference]: Finished difference. Result has 119 places, 90 transitions, 906 flow [2023-08-30 06:22:08,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=119, PETRI_TRANSITIONS=90} [2023-08-30 06:22:08,328 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2023-08-30 06:22:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 90 transitions, 906 flow [2023-08-30 06:22:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:08,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:08,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:08,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 06:22:08,330 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:08,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2063772676, now seen corresponding path program 4 times [2023-08-30 06:22:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647421638] [2023-08-30 06:22:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:08,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647421638] [2023-08-30 06:22:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647421638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:22:08,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524707397] [2023-08-30 06:22:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:08,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:22:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:22:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:22:08,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:22:08,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 90 transitions, 906 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:08,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:08,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:22:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:10,053 INFO L130 PetriNetUnfolder]: 12426/16885 cut-off events. [2023-08-30 06:22:10,053 INFO L131 PetriNetUnfolder]: For 112368/117739 co-relation queries the response was YES. [2023-08-30 06:22:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88849 conditions, 16885 events. 12426/16885 cut-off events. For 112368/117739 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 92925 event pairs, 3035 based on Foata normal form. 2829/19475 useless extension candidates. Maximal degree in co-relation 88807. Up to 8582 conditions per place. [2023-08-30 06:22:10,181 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 160 selfloop transitions, 19 changer transitions 0/187 dead transitions. [2023-08-30 06:22:10,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 2081 flow [2023-08-30 06:22:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:22:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:22:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-08-30 06:22:10,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-08-30 06:22:10,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-08-30 06:22:10,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-08-30 06:22:10,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:10,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-08-30 06:22:10,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:10,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:10,186 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:10,186 INFO L175 Difference]: Start difference. First operand has 119 places, 90 transitions, 906 flow. Second operand 5 states and 663 transitions. [2023-08-30 06:22:10,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 2081 flow [2023-08-30 06:22:10,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 2025 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 06:22:10,650 INFO L231 Difference]: Finished difference. Result has 120 places, 91 transitions, 908 flow [2023-08-30 06:22:10,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=120, PETRI_TRANSITIONS=91} [2023-08-30 06:22:10,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2023-08-30 06:22:10,651 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 91 transitions, 908 flow [2023-08-30 06:22:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:10,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:10,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:10,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 06:22:10,651 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:10,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1551658481, now seen corresponding path program 3 times [2023-08-30 06:22:10,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:10,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817397968] [2023-08-30 06:22:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:10,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:10,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817397968] [2023-08-30 06:22:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817397968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:10,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:10,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:22:10,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641324308] [2023-08-30 06:22:10,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:10,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:22:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:22:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:22:10,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:22:10,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 91 transitions, 908 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:10,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:10,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:22:10,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:12,247 INFO L130 PetriNetUnfolder]: 11084/15095 cut-off events. [2023-08-30 06:22:12,247 INFO L131 PetriNetUnfolder]: For 126197/133058 co-relation queries the response was YES. [2023-08-30 06:22:12,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78692 conditions, 15095 events. 11084/15095 cut-off events. For 126197/133058 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 84219 event pairs, 2467 based on Foata normal form. 2507/17319 useless extension candidates. Maximal degree in co-relation 78650. Up to 7838 conditions per place. [2023-08-30 06:22:12,370 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 192 selfloop transitions, 22 changer transitions 14/236 dead transitions. [2023-08-30 06:22:12,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 236 transitions, 2693 flow [2023-08-30 06:22:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:22:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:22:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2023-08-30 06:22:12,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889705882352941 [2023-08-30 06:22:12,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2023-08-30 06:22:12,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2023-08-30 06:22:12,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:12,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2023-08-30 06:22:12,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:12,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:12,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 272.0) internal successors, (1904), 7 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:12,377 INFO L175 Difference]: Start difference. First operand has 120 places, 91 transitions, 908 flow. Second operand 6 states and 798 transitions. [2023-08-30 06:22:12,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 236 transitions, 2693 flow [2023-08-30 06:22:12,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 236 transitions, 2567 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-30 06:22:12,607 INFO L231 Difference]: Finished difference. Result has 123 places, 94 transitions, 961 flow [2023-08-30 06:22:12,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=961, PETRI_PLACES=123, PETRI_TRANSITIONS=94} [2023-08-30 06:22:12,608 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2023-08-30 06:22:12,608 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 94 transitions, 961 flow [2023-08-30 06:22:12,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:12,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:12,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 06:22:12,609 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:12,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash 65376171, now seen corresponding path program 4 times [2023-08-30 06:22:12,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:12,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694435367] [2023-08-30 06:22:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:12,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:12,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:12,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694435367] [2023-08-30 06:22:12,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694435367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:12,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:12,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:22:12,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852088792] [2023-08-30 06:22:12,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:12,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 06:22:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 06:22:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 06:22:12,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 272 [2023-08-30 06:22:12,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 94 transitions, 961 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:12,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:12,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 272 [2023-08-30 06:22:12,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:14,134 INFO L130 PetriNetUnfolder]: 10222/13921 cut-off events. [2023-08-30 06:22:14,135 INFO L131 PetriNetUnfolder]: For 115976/122508 co-relation queries the response was YES. [2023-08-30 06:22:14,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74098 conditions, 13921 events. 10222/13921 cut-off events. For 115976/122508 co-relation queries the response was YES. Maximal size of possible extension queue 1002. Compared 76684 event pairs, 2127 based on Foata normal form. 2256/15986 useless extension candidates. Maximal degree in co-relation 74055. Up to 6158 conditions per place. [2023-08-30 06:22:14,256 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 179 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2023-08-30 06:22:14,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 206 transitions, 2319 flow [2023-08-30 06:22:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:22:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:22:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 667 transitions. [2023-08-30 06:22:14,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904411764705882 [2023-08-30 06:22:14,257 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 667 transitions. [2023-08-30 06:22:14,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 667 transitions. [2023-08-30 06:22:14,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:14,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 667 transitions. [2023-08-30 06:22:14,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:14,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:14,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 272.0) internal successors, (1632), 6 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:14,260 INFO L175 Difference]: Start difference. First operand has 123 places, 94 transitions, 961 flow. Second operand 5 states and 667 transitions. [2023-08-30 06:22:14,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 206 transitions, 2319 flow [2023-08-30 06:22:14,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 2263 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-30 06:22:14,568 INFO L231 Difference]: Finished difference. Result has 124 places, 95 transitions, 963 flow [2023-08-30 06:22:14,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=963, PETRI_PLACES=124, PETRI_TRANSITIONS=95} [2023-08-30 06:22:14,568 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-08-30 06:22:14,569 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 95 transitions, 963 flow [2023-08-30 06:22:14,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:14,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:14,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:14,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 06:22:14,569 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:14,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1336498222, now seen corresponding path program 1 times [2023-08-30 06:22:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30453321] [2023-08-30 06:22:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:14,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:22:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:14,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30453321] [2023-08-30 06:22:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30453321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:22:14,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:22:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:22:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74319525] [2023-08-30 06:22:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:22:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:22:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:22:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:22:14,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 272 [2023-08-30 06:22:14,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 95 transitions, 963 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:14,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:14,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 272 [2023-08-30 06:22:14,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:15,444 INFO L130 PetriNetUnfolder]: 5924/8258 cut-off events. [2023-08-30 06:22:15,444 INFO L131 PetriNetUnfolder]: For 79346/86476 co-relation queries the response was YES. [2023-08-30 06:22:15,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42697 conditions, 8258 events. 5924/8258 cut-off events. For 79346/86476 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 46570 event pairs, 1960 based on Foata normal form. 2906/10953 useless extension candidates. Maximal degree in co-relation 42654. Up to 5607 conditions per place. [2023-08-30 06:22:15,505 INFO L137 encePairwiseOnDemand]: 269/272 looper letters, 81 selfloop transitions, 10 changer transitions 17/122 dead transitions. [2023-08-30 06:22:15,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 1316 flow [2023-08-30 06:22:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:22:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:22:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-30 06:22:15,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-30 06:22:15,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-30 06:22:15,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-30 06:22:15,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:15,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-30 06:22:15,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:15,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:15,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:15,509 INFO L175 Difference]: Start difference. First operand has 124 places, 95 transitions, 963 flow. Second operand 3 states and 425 transitions. [2023-08-30 06:22:15,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 1316 flow [2023-08-30 06:22:15,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 122 transitions, 1277 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 06:22:15,630 INFO L231 Difference]: Finished difference. Result has 124 places, 83 transitions, 839 flow [2023-08-30 06:22:15,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=839, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2023-08-30 06:22:15,631 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-08-30 06:22:15,631 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 839 flow [2023-08-30 06:22:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:15,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:15,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 06:22:15,632 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:15,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1701116707, now seen corresponding path program 1 times [2023-08-30 06:22:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:15,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610402834] [2023-08-30 06:22:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610402834] [2023-08-30 06:22:15,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610402834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:15,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923230409] [2023-08-30 06:22:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:15,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:15,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:15,753 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) [2023-08-30 06:22:15,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 06:22:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:22:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:15,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:22:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923230409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:16,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:16,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 06:22:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882797745] [2023-08-30 06:22:16,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:16,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:22:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:22:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:22:16,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-30 06:22:16,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 839 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:16,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:16,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-30 06:22:16,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:17,730 INFO L130 PetriNetUnfolder]: 10954/14997 cut-off events. [2023-08-30 06:22:17,730 INFO L131 PetriNetUnfolder]: For 112708/122845 co-relation queries the response was YES. [2023-08-30 06:22:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72006 conditions, 14997 events. 10954/14997 cut-off events. For 112708/122845 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 82588 event pairs, 995 based on Foata normal form. 4322/19188 useless extension candidates. Maximal degree in co-relation 71962. Up to 7880 conditions per place. [2023-08-30 06:22:17,844 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 163 selfloop transitions, 83 changer transitions 5/265 dead transitions. [2023-08-30 06:22:17,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 265 transitions, 2665 flow [2023-08-30 06:22:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:22:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:22:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2023-08-30 06:22:17,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-08-30 06:22:17,846 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2023-08-30 06:22:17,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2023-08-30 06:22:17,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:17,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2023-08-30 06:22:17,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:17,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:17,849 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:17,849 INFO L175 Difference]: Start difference. First operand has 124 places, 83 transitions, 839 flow. Second operand 7 states and 1003 transitions. [2023-08-30 06:22:17,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 265 transitions, 2665 flow [2023-08-30 06:22:18,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 265 transitions, 2572 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-30 06:22:18,113 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1781 flow [2023-08-30 06:22:18,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1781, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2023-08-30 06:22:18,114 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2023-08-30 06:22:18,115 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1781 flow [2023-08-30 06:22:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:18,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:18,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:18,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:22:18,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:18,321 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:18,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -103981559, now seen corresponding path program 2 times [2023-08-30 06:22:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:18,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115894176] [2023-08-30 06:22:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:18,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115894176] [2023-08-30 06:22:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115894176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63349910] [2023-08-30 06:22:18,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:22:18,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:18,450 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) [2023-08-30 06:22:18,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 06:22:18,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:22:18,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:18,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:22:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:18,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:18,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63349910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:18,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:18,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-30 06:22:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972543683] [2023-08-30 06:22:18,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:22:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:22:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:22:18,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 272 [2023-08-30 06:22:18,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1781 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:18,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:18,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 272 [2023-08-30 06:22:18,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:21,147 INFO L130 PetriNetUnfolder]: 16250/22218 cut-off events. [2023-08-30 06:22:21,147 INFO L131 PetriNetUnfolder]: For 166390/179808 co-relation queries the response was YES. [2023-08-30 06:22:21,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113544 conditions, 22218 events. 16250/22218 cut-off events. For 166390/179808 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 128281 event pairs, 2811 based on Foata normal form. 4715/26791 useless extension candidates. Maximal degree in co-relation 113505. Up to 16099 conditions per place. [2023-08-30 06:22:21,329 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 235 selfloop transitions, 79 changer transitions 5/333 dead transitions. [2023-08-30 06:22:21,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 333 transitions, 3952 flow [2023-08-30 06:22:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:22:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:22:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 999 transitions. [2023-08-30 06:22:21,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246848739495799 [2023-08-30 06:22:21,331 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 999 transitions. [2023-08-30 06:22:21,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 999 transitions. [2023-08-30 06:22:21,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:21,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 999 transitions. [2023-08-30 06:22:21,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:21,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:21,334 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:21,334 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1781 flow. Second operand 7 states and 999 transitions. [2023-08-30 06:22:21,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 333 transitions, 3952 flow [2023-08-30 06:22:21,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 333 transitions, 3752 flow, removed 100 selfloop flow, removed 0 redundant places. [2023-08-30 06:22:21,763 INFO L231 Difference]: Finished difference. Result has 124 places, 222 transitions, 2808 flow [2023-08-30 06:22:21,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2808, PETRI_PLACES=124, PETRI_TRANSITIONS=222} [2023-08-30 06:22:21,764 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2023-08-30 06:22:21,764 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 222 transitions, 2808 flow [2023-08-30 06:22:21,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:21,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:21,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:21,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:22:21,970 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,SelfDestructingSolverStorable30 [2023-08-30 06:22:21,970 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:21,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash -112611065, now seen corresponding path program 3 times [2023-08-30 06:22:21,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:21,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32538739] [2023-08-30 06:22:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:22,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32538739] [2023-08-30 06:22:22,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32538739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:22,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448086153] [2023-08-30 06:22:22,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:22:22,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:22,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:22,065 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) [2023-08-30 06:22:22,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 06:22:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:22:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:22:22,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:22,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448086153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:22,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:22,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 06:22:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558273050] [2023-08-30 06:22:22,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:22,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 06:22:22,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 06:22:22,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 06:22:22,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:22:22,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 222 transitions, 2808 flow. Second operand has 11 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:22,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:22,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:22:22,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:26,164 INFO L130 PetriNetUnfolder]: 23989/32858 cut-off events. [2023-08-30 06:22:26,164 INFO L131 PetriNetUnfolder]: For 266213/283063 co-relation queries the response was YES. [2023-08-30 06:22:26,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170386 conditions, 32858 events. 23989/32858 cut-off events. For 266213/283063 co-relation queries the response was YES. Maximal size of possible extension queue 1741. Compared 197944 event pairs, 4756 based on Foata normal form. 5790/38560 useless extension candidates. Maximal degree in co-relation 170343. Up to 17582 conditions per place. [2023-08-30 06:22:26,501 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 426 selfloop transitions, 39 changer transitions 0/473 dead transitions. [2023-08-30 06:22:26,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 473 transitions, 6340 flow [2023-08-30 06:22:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:22:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:22:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 926 transitions. [2023-08-30 06:22:26,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48634453781512604 [2023-08-30 06:22:26,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 926 transitions. [2023-08-30 06:22:26,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 926 transitions. [2023-08-30 06:22:26,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:26,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 926 transitions. [2023-08-30 06:22:26,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:26,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:26,506 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 272.0) internal successors, (2176), 8 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:26,506 INFO L175 Difference]: Start difference. First operand has 124 places, 222 transitions, 2808 flow. Second operand 7 states and 926 transitions. [2023-08-30 06:22:26,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 473 transitions, 6340 flow [2023-08-30 06:22:27,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 473 transitions, 5848 flow, removed 246 selfloop flow, removed 0 redundant places. [2023-08-30 06:22:27,334 INFO L231 Difference]: Finished difference. Result has 134 places, 245 transitions, 2882 flow [2023-08-30 06:22:27,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2882, PETRI_PLACES=134, PETRI_TRANSITIONS=245} [2023-08-30 06:22:27,335 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2023-08-30 06:22:27,335 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 245 transitions, 2882 flow [2023-08-30 06:22:27,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.9090909090909) internal successors, (1330), 11 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:27,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:27,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:27,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 06:22:27,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-30 06:22:27,536 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:27,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1052429063, now seen corresponding path program 4 times [2023-08-30 06:22:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:27,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867502286] [2023-08-30 06:22:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:27,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:27,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867502286] [2023-08-30 06:22:27,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867502286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:27,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486043247] [2023-08-30 06:22:27,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:22:27,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:27,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:27,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:22:27,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 06:22:27,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:22:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:22:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:27,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486043247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:27,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:27,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-30 06:22:27,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8068989] [2023-08-30 06:22:27,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:27,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 06:22:27,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:27,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 06:22:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 06:22:27,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:22:27,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 245 transitions, 2882 flow. Second operand has 11 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:27,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:27,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:22:27,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:32,214 INFO L130 PetriNetUnfolder]: 24767/34055 cut-off events. [2023-08-30 06:22:32,214 INFO L131 PetriNetUnfolder]: For 294765/310653 co-relation queries the response was YES. [2023-08-30 06:22:32,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177769 conditions, 34055 events. 24767/34055 cut-off events. For 294765/310653 co-relation queries the response was YES. Maximal size of possible extension queue 1831. Compared 212440 event pairs, 4612 based on Foata normal form. 5623/39395 useless extension candidates. Maximal degree in co-relation 177721. Up to 16055 conditions per place. [2023-08-30 06:22:32,601 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 723 selfloop transitions, 54 changer transitions 34/819 dead transitions. [2023-08-30 06:22:32,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 819 transitions, 10837 flow [2023-08-30 06:22:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:22:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:22:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1435 transitions. [2023-08-30 06:22:32,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47961229946524064 [2023-08-30 06:22:32,603 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1435 transitions. [2023-08-30 06:22:32,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1435 transitions. [2023-08-30 06:22:32,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:32,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1435 transitions. [2023-08-30 06:22:32,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 130.45454545454547) internal successors, (1435), 11 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:32,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:32,606 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:32,606 INFO L175 Difference]: Start difference. First operand has 134 places, 245 transitions, 2882 flow. Second operand 11 states and 1435 transitions. [2023-08-30 06:22:32,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 819 transitions, 10837 flow [2023-08-30 06:22:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 819 transitions, 10768 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-30 06:22:33,732 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3323 flow [2023-08-30 06:22:33,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3323, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2023-08-30 06:22:33,733 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2023-08-30 06:22:33,733 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3323 flow [2023-08-30 06:22:33,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.18181818181819) internal successors, (1322), 11 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:33,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:33,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:33,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 06:22:33,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-30 06:22:33,934 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:33,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1799135425, now seen corresponding path program 5 times [2023-08-30 06:22:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:33,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558525833] [2023-08-30 06:22:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:34,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558525833] [2023-08-30 06:22:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558525833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527475474] [2023-08-30 06:22:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:22:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:34,013 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:22:34,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 06:22:34,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 06:22:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:22:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:34,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527475474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:34,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 06:22:34,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135624951] [2023-08-30 06:22:34,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:34,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:22:34,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:22:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:22:34,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:22:34,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3323 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:34,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:34,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:22:34,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:42,053 INFO L130 PetriNetUnfolder]: 44809/61566 cut-off events. [2023-08-30 06:22:42,054 INFO L131 PetriNetUnfolder]: For 514484/543802 co-relation queries the response was YES. [2023-08-30 06:22:42,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330312 conditions, 61566 events. 44809/61566 cut-off events. For 514484/543802 co-relation queries the response was YES. Maximal size of possible extension queue 3012. Compared 401937 event pairs, 11114 based on Foata normal form. 10735/72048 useless extension candidates. Maximal degree in co-relation 330259. Up to 23133 conditions per place. [2023-08-30 06:22:43,203 INFO L137 encePairwiseOnDemand]: 267/272 looper letters, 744 selfloop transitions, 152 changer transitions 0/904 dead transitions. [2023-08-30 06:22:43,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 904 transitions, 11646 flow [2023-08-30 06:22:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:22:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:22:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1719 transitions. [2023-08-30 06:22:43,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861425339366516 [2023-08-30 06:22:43,205 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1719 transitions. [2023-08-30 06:22:43,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1719 transitions. [2023-08-30 06:22:43,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:43,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1719 transitions. [2023-08-30 06:22:43,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.23076923076923) internal successors, (1719), 13 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:43,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:43,209 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 272.0) internal successors, (3808), 14 states have internal predecessors, (3808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:43,209 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3323 flow. Second operand 13 states and 1719 transitions. [2023-08-30 06:22:43,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 904 transitions, 11646 flow [2023-08-30 06:22:46,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 904 transitions, 11409 flow, removed 79 selfloop flow, removed 1 redundant places. [2023-08-30 06:22:46,476 INFO L231 Difference]: Finished difference. Result has 165 places, 372 transitions, 4792 flow [2023-08-30 06:22:46,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=3216, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4792, PETRI_PLACES=165, PETRI_TRANSITIONS=372} [2023-08-30 06:22:46,477 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2023-08-30 06:22:46,477 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 372 transitions, 4792 flow [2023-08-30 06:22:46,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:46,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:22:46,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:22:46,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 06:22:46,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 06:22:46,678 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:22:46,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:22:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 59740837, now seen corresponding path program 6 times [2023-08-30 06:22:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:22:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446660437] [2023-08-30 06:22:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:22:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:22:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:22:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:22:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446660437] [2023-08-30 06:22:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446660437] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:22:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162750709] [2023-08-30 06:22:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 06:22:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:22:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:22:46,765 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:22:46,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 06:22:46,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 06:22:46,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:22:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:22:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:22:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:46,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:22:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:22:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162750709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:22:47,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:22:47,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 06:22:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991301189] [2023-08-30 06:22:47,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:22:47,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 06:22:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:22:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 06:22:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-30 06:22:47,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:22:47,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 372 transitions, 4792 flow. Second operand has 13 states, 13 states have (on average 120.46153846153847) internal successors, (1566), 13 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:47,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:22:47,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:22:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:22:57,648 INFO L130 PetriNetUnfolder]: 54669/74716 cut-off events. [2023-08-30 06:22:57,648 INFO L131 PetriNetUnfolder]: For 747241/782376 co-relation queries the response was YES. [2023-08-30 06:22:58,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430795 conditions, 74716 events. 54669/74716 cut-off events. For 747241/782376 co-relation queries the response was YES. Maximal size of possible extension queue 3505. Compared 493004 event pairs, 12065 based on Foata normal form. 14110/88664 useless extension candidates. Maximal degree in co-relation 430734. Up to 56939 conditions per place. [2023-08-30 06:22:59,262 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 693 selfloop transitions, 103 changer transitions 0/804 dead transitions. [2023-08-30 06:22:59,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 804 transitions, 11137 flow [2023-08-30 06:22:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 06:22:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 06:22:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1442 transitions. [2023-08-30 06:22:59,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.481951871657754 [2023-08-30 06:22:59,264 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1442 transitions. [2023-08-30 06:22:59,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1442 transitions. [2023-08-30 06:22:59,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:22:59,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1442 transitions. [2023-08-30 06:22:59,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 131.0909090909091) internal successors, (1442), 11 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:59,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:59,267 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 272.0) internal successors, (3264), 12 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:22:59,268 INFO L175 Difference]: Start difference. First operand has 165 places, 372 transitions, 4792 flow. Second operand 11 states and 1442 transitions. [2023-08-30 06:22:59,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 804 transitions, 11137 flow [2023-08-30 06:23:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 804 transitions, 10827 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-08-30 06:23:04,998 INFO L231 Difference]: Finished difference. Result has 175 places, 427 transitions, 5572 flow [2023-08-30 06:23:04,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5572, PETRI_PLACES=175, PETRI_TRANSITIONS=427} [2023-08-30 06:23:04,999 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2023-08-30 06:23:04,999 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 427 transitions, 5572 flow [2023-08-30 06:23:04,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.46153846153847) internal successors, (1566), 13 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:04,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:23:04,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:23:05,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:23:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:23:05,200 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:23:05,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:23:05,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1959135719, now seen corresponding path program 7 times [2023-08-30 06:23:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:23:05,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902615101] [2023-08-30 06:23:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:23:05,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:23:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:23:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:23:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902615101] [2023-08-30 06:23:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902615101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:23:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715836107] [2023-08-30 06:23:05,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 06:23:05,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:23:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:23:05,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:23:05,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 06:23:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:23:05,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:23:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:23:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:05,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:23:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715836107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:23:05,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:23:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 06:23:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267045865] [2023-08-30 06:23:05,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:23:05,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:23:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:23:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:23:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:23:05,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:23:05,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 427 transitions, 5572 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:05,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:23:05,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:23:05,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:23:18,797 INFO L130 PetriNetUnfolder]: 60833/84211 cut-off events. [2023-08-30 06:23:18,797 INFO L131 PetriNetUnfolder]: For 1028343/1068291 co-relation queries the response was YES. [2023-08-30 06:23:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518771 conditions, 84211 events. 60833/84211 cut-off events. For 1028343/1068291 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 586961 event pairs, 10753 based on Foata normal form. 15118/99048 useless extension candidates. Maximal degree in co-relation 518706. Up to 29509 conditions per place. [2023-08-30 06:23:20,616 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1289 selfloop transitions, 171 changer transitions 13/1481 dead transitions. [2023-08-30 06:23:20,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1481 transitions, 20392 flow [2023-08-30 06:23:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 06:23:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 06:23:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2356 transitions. [2023-08-30 06:23:20,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812091503267974 [2023-08-30 06:23:20,619 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2356 transitions. [2023-08-30 06:23:20,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2356 transitions. [2023-08-30 06:23:20,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:23:20,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2356 transitions. [2023-08-30 06:23:20,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.88888888888889) internal successors, (2356), 18 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:20,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:20,624 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:20,624 INFO L175 Difference]: Start difference. First operand has 175 places, 427 transitions, 5572 flow. Second operand 18 states and 2356 transitions. [2023-08-30 06:23:20,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1481 transitions, 20392 flow [2023-08-30 06:23:29,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 1481 transitions, 19956 flow, removed 205 selfloop flow, removed 2 redundant places. [2023-08-30 06:23:29,605 INFO L231 Difference]: Finished difference. Result has 196 places, 492 transitions, 6457 flow [2023-08-30 06:23:29,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=5162, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6457, PETRI_PLACES=196, PETRI_TRANSITIONS=492} [2023-08-30 06:23:29,606 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2023-08-30 06:23:29,606 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 492 transitions, 6457 flow [2023-08-30 06:23:29,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:29,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:23:29,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:23:29,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:23:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:23:29,811 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:23:29,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:23:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1199667839, now seen corresponding path program 8 times [2023-08-30 06:23:29,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:23:29,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43828043] [2023-08-30 06:23:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:23:29,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:23:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:23:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:23:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43828043] [2023-08-30 06:23:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43828043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:23:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196828953] [2023-08-30 06:23:29,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:23:29,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:23:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:23:29,889 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:23:29,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 06:23:30,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:23:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:23:30,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:23:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:23:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:30,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:23:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:23:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196828953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:23:30,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:23:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-30 06:23:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831047766] [2023-08-30 06:23:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:23:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 06:23:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:23:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 06:23:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-30 06:23:30,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:23:30,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 492 transitions, 6457 flow. Second operand has 13 states, 13 states have (on average 120.3076923076923) internal successors, (1564), 13 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:30,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:23:30,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:23:30,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:23:44,085 INFO L130 PetriNetUnfolder]: 59569/82514 cut-off events. [2023-08-30 06:23:44,086 INFO L131 PetriNetUnfolder]: For 1073927/1111618 co-relation queries the response was YES. [2023-08-30 06:23:45,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516061 conditions, 82514 events. 59569/82514 cut-off events. For 1073927/1111618 co-relation queries the response was YES. Maximal size of possible extension queue 3980. Compared 573406 event pairs, 12149 based on Foata normal form. 13792/95896 useless extension candidates. Maximal degree in co-relation 515989. Up to 40319 conditions per place. [2023-08-30 06:23:46,019 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1093 selfloop transitions, 156 changer transitions 52/1309 dead transitions. [2023-08-30 06:23:46,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1309 transitions, 18142 flow [2023-08-30 06:23:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 06:23:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 06:23:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2345 transitions. [2023-08-30 06:23:46,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789624183006536 [2023-08-30 06:23:46,021 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2345 transitions. [2023-08-30 06:23:46,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2345 transitions. [2023-08-30 06:23:46,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:23:46,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2345 transitions. [2023-08-30 06:23:46,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 130.27777777777777) internal successors, (2345), 18 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:46,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:46,027 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 272.0) internal successors, (5168), 19 states have internal predecessors, (5168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:23:46,027 INFO L175 Difference]: Start difference. First operand has 196 places, 492 transitions, 6457 flow. Second operand 18 states and 2345 transitions. [2023-08-30 06:23:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1309 transitions, 18142 flow [2023-08-30 06:24:00,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1309 transitions, 17886 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-08-30 06:24:00,174 INFO L231 Difference]: Finished difference. Result has 209 places, 497 transitions, 6629 flow [2023-08-30 06:24:00,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=6205, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6629, PETRI_PLACES=209, PETRI_TRANSITIONS=497} [2023-08-30 06:24:00,175 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2023-08-30 06:24:00,175 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 497 transitions, 6629 flow [2023-08-30 06:24:00,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 120.3076923076923) internal successors, (1564), 13 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:00,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:24:00,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:24:00,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:24:00,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 06:24:00,376 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:24:00,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:24:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1817606293, now seen corresponding path program 9 times [2023-08-30 06:24:00,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:24:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592831324] [2023-08-30 06:24:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:24:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:24:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:24:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:24:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:24:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592831324] [2023-08-30 06:24:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592831324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:24:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104863263] [2023-08-30 06:24:00,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:24:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:24:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:24:00,447 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:24:00,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 06:24:00,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:24:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:24:00,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:24:00,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:24:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:24:00,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:24:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:24:00,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104863263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:24:00,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:24:00,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 06:24:00,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49970202] [2023-08-30 06:24:00,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:24:00,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:24:00,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:24:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:24:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:24:00,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:24:00,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 497 transitions, 6629 flow. Second operand has 12 states, 12 states have (on average 120.5) internal successors, (1446), 12 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:00,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:24:00,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:24:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:24:18,256 INFO L130 PetriNetUnfolder]: 75187/104165 cut-off events. [2023-08-30 06:24:18,256 INFO L131 PetriNetUnfolder]: For 1335809/1382634 co-relation queries the response was YES. [2023-08-30 06:24:19,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634396 conditions, 104165 events. 75187/104165 cut-off events. For 1335809/1382634 co-relation queries the response was YES. Maximal size of possible extension queue 4904. Compared 734558 event pairs, 15833 based on Foata normal form. 18898/122844 useless extension candidates. Maximal degree in co-relation 634321. Up to 55115 conditions per place. [2023-08-30 06:24:20,271 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 869 selfloop transitions, 211 changer transitions 0/1088 dead transitions. [2023-08-30 06:24:20,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1088 transitions, 15477 flow [2023-08-30 06:24:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 06:24:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 06:24:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1845 transitions. [2023-08-30 06:24:20,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845063025210084 [2023-08-30 06:24:20,273 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1845 transitions. [2023-08-30 06:24:20,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1845 transitions. [2023-08-30 06:24:20,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:24:20,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1845 transitions. [2023-08-30 06:24:20,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 131.78571428571428) internal successors, (1845), 14 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:20,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 272.0) internal successors, (4080), 15 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:20,277 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 272.0) internal successors, (4080), 15 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:20,277 INFO L175 Difference]: Start difference. First operand has 209 places, 497 transitions, 6629 flow. Second operand 14 states and 1845 transitions. [2023-08-30 06:24:20,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1088 transitions, 15477 flow [2023-08-30 06:24:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1088 transitions, 15292 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-08-30 06:24:30,681 INFO L231 Difference]: Finished difference. Result has 216 places, 583 transitions, 8467 flow [2023-08-30 06:24:30,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8467, PETRI_PLACES=216, PETRI_TRANSITIONS=583} [2023-08-30 06:24:30,682 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 161 predicate places. [2023-08-30 06:24:30,682 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 583 transitions, 8467 flow [2023-08-30 06:24:30,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.5) internal successors, (1446), 12 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:30,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:24:30,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:24:30,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:24:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 06:24:30,883 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:24:30,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:24:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1603488335, now seen corresponding path program 10 times [2023-08-30 06:24:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:24:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965977853] [2023-08-30 06:24:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:24:30,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:24:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:24:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:24:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:24:30,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965977853] [2023-08-30 06:24:30,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965977853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:24:30,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140116385] [2023-08-30 06:24:30,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 06:24:30,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:24:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:24:30,951 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:24:30,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 06:24:31,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 06:24:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:24:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:24:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:24:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:24:31,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:24:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:24:31,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140116385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:24:31,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:24:31,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 06:24:31,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143973204] [2023-08-30 06:24:31,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:24:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:24:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:24:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:24:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:24:31,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:24:31,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 583 transitions, 8467 flow. Second operand has 12 states, 12 states have (on average 120.0) internal successors, (1440), 12 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:31,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:24:31,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:24:31,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:24:51,242 INFO L130 PetriNetUnfolder]: 79111/109646 cut-off events. [2023-08-30 06:24:51,242 INFO L131 PetriNetUnfolder]: For 1539998/1591304 co-relation queries the response was YES. [2023-08-30 06:24:53,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704493 conditions, 109646 events. 79111/109646 cut-off events. For 1539998/1591304 co-relation queries the response was YES. Maximal size of possible extension queue 5246. Compared 788686 event pairs, 4783 based on Foata normal form. 19170/128708 useless extension candidates. Maximal degree in co-relation 704413. Up to 30237 conditions per place. [2023-08-30 06:24:53,849 INFO L137 encePairwiseOnDemand]: 266/272 looper letters, 1242 selfloop transitions, 313 changer transitions 19/1582 dead transitions. [2023-08-30 06:24:53,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 1582 transitions, 23794 flow [2023-08-30 06:24:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 06:24:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 06:24:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2457 transitions. [2023-08-30 06:24:53,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47542569659442724 [2023-08-30 06:24:53,851 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2457 transitions. [2023-08-30 06:24:53,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2457 transitions. [2023-08-30 06:24:53,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:24:53,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2457 transitions. [2023-08-30 06:24:53,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 129.31578947368422) internal successors, (2457), 19 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:53,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 272.0) internal successors, (5440), 20 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:53,858 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 272.0) internal successors, (5440), 20 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:24:53,858 INFO L175 Difference]: Start difference. First operand has 216 places, 583 transitions, 8467 flow. Second operand 19 states and 2457 transitions. [2023-08-30 06:24:53,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 1582 transitions, 23794 flow [2023-08-30 06:25:15,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1582 transitions, 23134 flow, removed 235 selfloop flow, removed 9 redundant places. [2023-08-30 06:25:15,404 INFO L231 Difference]: Finished difference. Result has 230 places, 708 transitions, 10750 flow [2023-08-30 06:25:15,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=7759, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10750, PETRI_PLACES=230, PETRI_TRANSITIONS=708} [2023-08-30 06:25:15,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 175 predicate places. [2023-08-30 06:25:15,405 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 708 transitions, 10750 flow [2023-08-30 06:25:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 120.0) internal successors, (1440), 12 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:25:15,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:25:15,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 06:25:15,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 06:25:15,606 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 06:25:15,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:25:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 752399401, now seen corresponding path program 11 times [2023-08-30 06:25:15,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:25:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375617659] [2023-08-30 06:25:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:25:15,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:25:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:25:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:15,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:25:15,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375617659] [2023-08-30 06:25:15,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375617659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 06:25:15,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261465742] [2023-08-30 06:25:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 06:25:15,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 06:25:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:25:15,681 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 06:25:15,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 06:25:15,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:25:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:25:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 06:25:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:25:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:15,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:25:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:25:15,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261465742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:25:15,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 06:25:15,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 06:25:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399343664] [2023-08-30 06:25:15,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 06:25:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 06:25:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:25:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 06:25:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-30 06:25:15,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 272 [2023-08-30 06:25:15,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 708 transitions, 10750 flow. Second operand has 15 states, 15 states have (on average 119.4) internal successors, (1791), 15 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:25:15,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:25:15,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 272 [2023-08-30 06:25:15,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand