./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-5.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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:35:25,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:35:25,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:35:25,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:35:25,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:35:25,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:35:25,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:35:25,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:35:25,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:35:25,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:35:25,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:35:25,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:35:25,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:35:25,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:35:25,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:35:25,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:35:25,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:35:25,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:35:25,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:35:25,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:35:25,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:35:25,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:35:25,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:35:25,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:35:25,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:35:25,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:35:25,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:35:25,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:35:25,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:35:25,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:35:25,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:35:25,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:35:25,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:35:25,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:35:25,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:35:25,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:35:25,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:35:25,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:35:25,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:35:25,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:35:25,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:35:25,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:35:25,923 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:35:25,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:35:25,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:35:25,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:35:25,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:35:25,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:35:25,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:35:25,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:35:25,927 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:35:25,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:35:25,928 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:35:25,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:35:25,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:35:25,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:35:25,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:35:25,929 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:35:25,929 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:35:25,929 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:35:25,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:35:25,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:35:25,930 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:35:25,930 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:35:25,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:35:25,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:35:25,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:35:25,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:35:25,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:35:25,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:35:25,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:35:25,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:35:25,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:35:25,932 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:35:25,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:35:25,932 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:35:25,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:35:26,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:35:26,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:35:26,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:35:26,255 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:35:26,255 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:35:26,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-29 23:35:27,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:35:27,627 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:35:27,627 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-29 23:35:27,633 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e675c405/49c7776042fd4a9db1e55d8a191e15dd/FLAG7c64b0e7f [2023-08-29 23:35:27,646 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e675c405/49c7776042fd4a9db1e55d8a191e15dd [2023-08-29 23:35:27,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:35:27,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:35:27,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:35:27,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:35:27,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:35:27,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31212e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27, skipping insertion in model container [2023-08-29 23:35:27,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:35:27,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:35:27,846 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-08-29 23:35:27,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:35:27,857 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:35:27,876 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c[3027,3040] [2023-08-29 23:35:27,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:35:27,883 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:35:27,884 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:35:27,889 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:35:27,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27 WrapperNode [2023-08-29 23:35:27,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:35:27,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:35:27,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:35:27,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:35:27,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,923 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 149 [2023-08-29 23:35:27,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:35:27,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:35:27,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:35:27,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:35:27,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,945 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:35:27,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:35:27,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:35:27,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:35:27,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (1/1) ... [2023-08-29 23:35:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:35:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:27,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:35:27,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:35:28,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:35:28,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:35:28,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:35:28,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:35:28,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:35:28,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:35:28,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:35:28,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:35:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:35:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:35:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:35:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:35:28,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:35:28,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:35:28,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:35:28,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:35:28,023 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:35:28,121 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:35:28,123 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:35:28,392 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:35:28,508 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:35:28,508 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 23:35:28,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:35:28 BoogieIcfgContainer [2023-08-29 23:35:28,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:35:28,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:35:28,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:35:28,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:35:28,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:35:27" (1/3) ... [2023-08-29 23:35:28,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6564cad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:35:28, skipping insertion in model container [2023-08-29 23:35:28,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:35:27" (2/3) ... [2023-08-29 23:35:28,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6564cad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:35:28, skipping insertion in model container [2023-08-29 23:35:28,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:35:28" (3/3) ... [2023-08-29 23:35:28,526 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-29 23:35:28,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:35:28,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-29 23:35:28,541 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:35:28,613 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:35:28,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 125 transitions, 274 flow [2023-08-29 23:35:28,702 INFO L130 PetriNetUnfolder]: 7/122 cut-off events. [2023-08-29 23:35:28,706 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:35:28,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 122 events. 7/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 132 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-29 23:35:28,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 125 transitions, 274 flow [2023-08-29 23:35:28,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 118 transitions, 254 flow [2023-08-29 23:35:28,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:35:28,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 118 transitions, 254 flow [2023-08-29 23:35:28,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 118 transitions, 254 flow [2023-08-29 23:35:28,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 118 transitions, 254 flow [2023-08-29 23:35:28,797 INFO L130 PetriNetUnfolder]: 7/118 cut-off events. [2023-08-29 23:35:28,798 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:35:28,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 118 events. 7/118 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 134 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-29 23:35:28,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2023-08-29 23:35:32,875 INFO L134 LiptonReduction]: Checked pairs total: 2832 [2023-08-29 23:35:32,876 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-29 23:35:32,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:35:32,903 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;@4481d242, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:35:32,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-29 23:35:32,907 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 23:35:32,907 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:32,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:32,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:35:32,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:32,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 532, now seen corresponding path program 1 times [2023-08-29 23:35:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:32,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996031305] [2023-08-29 23:35:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:32,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:33,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996031305] [2023-08-29 23:35:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996031305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:33,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:33,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:35:33,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028762654] [2023-08-29 23:35:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:35:33,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:35:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:35:33,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 241 [2023-08-29 23:35:33,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 88 flow. Second operand has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:33,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 241 [2023-08-29 23:35:33,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:33,200 INFO L130 PetriNetUnfolder]: 207/366 cut-off events. [2023-08-29 23:35:33,200 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-29 23:35:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 366 events. 207/366 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1741 event pairs, 203 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 612. Up to 359 conditions per place. [2023-08-29 23:35:33,209 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 28 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-29 23:35:33,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 138 flow [2023-08-29 23:35:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:35:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:35:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 253 transitions. [2023-08-29 23:35:33,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524896265560166 [2023-08-29 23:35:33,227 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 253 transitions. [2023-08-29 23:35:33,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 253 transitions. [2023-08-29 23:35:33,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:33,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 253 transitions. [2023-08-29 23:35:33,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 126.5) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,242 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,244 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 88 flow. Second operand 2 states and 253 transitions. [2023-08-29 23:35:33,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 138 flow [2023-08-29 23:35:33,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:35:33,250 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 70 flow [2023-08-29 23:35:33,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-29 23:35:33,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-29 23:35:33,256 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 70 flow [2023-08-29 23:35:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:33,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:35:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:35:33,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:33,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash 525433, now seen corresponding path program 1 times [2023-08-29 23:35:33,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:33,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784434892] [2023-08-29 23:35:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:33,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:33,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:33,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784434892] [2023-08-29 23:35:33,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784434892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:33,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:33,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:35:33,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223622967] [2023-08-29 23:35:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:33,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:35:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:33,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:35:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:35:33,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 241 [2023-08-29 23:35:33,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:33,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 241 [2023-08-29 23:35:33,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:33,698 INFO L130 PetriNetUnfolder]: 198/348 cut-off events. [2023-08-29 23:35:33,698 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:33,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 348 events. 198/348 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1630 event pairs, 194 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 701. Up to 340 conditions per place. [2023-08-29 23:35:33,702 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-29 23:35:33,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 118 flow [2023-08-29 23:35:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:35:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:35:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-29 23:35:33,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578146611341632 [2023-08-29 23:35:33,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-29 23:35:33,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-29 23:35:33,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:33,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-29 23:35:33,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,716 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 3 states and 331 transitions. [2023-08-29 23:35:33,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 118 flow [2023-08-29 23:35:33,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:35:33,718 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 68 flow [2023-08-29 23:35:33,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-29 23:35:33,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-29 23:35:33,719 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 68 flow [2023-08-29 23:35:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:33,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:35:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:35:33,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:33,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash 525435, now seen corresponding path program 1 times [2023-08-29 23:35:33,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:33,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201717861] [2023-08-29 23:35:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:33,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201717861] [2023-08-29 23:35:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201717861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:33,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:35:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975217969] [2023-08-29 23:35:33,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:35:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:35:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:35:33,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 241 [2023-08-29 23:35:33,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:33,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 241 [2023-08-29 23:35:33,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:33,982 INFO L130 PetriNetUnfolder]: 189/330 cut-off events. [2023-08-29 23:35:33,983 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 330 events. 189/330 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1540 event pairs, 185 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 666. Up to 322 conditions per place. [2023-08-29 23:35:33,985 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 23 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-29 23:35:33,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 112 flow [2023-08-29 23:35:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:35:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:35:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-29 23:35:33,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47579529737206083 [2023-08-29 23:35:33,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-29 23:35:33,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-29 23:35:33,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:33,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-29 23:35:33,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,991 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 68 flow. Second operand 3 states and 344 transitions. [2023-08-29 23:35:33,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 112 flow [2023-08-29 23:35:33,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:33,993 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 65 flow [2023-08-29 23:35:33,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-29 23:35:33,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -9 predicate places. [2023-08-29 23:35:33,994 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 65 flow [2023-08-29 23:35:33,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:33,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:33,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:35:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:35:33,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:33,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash 504954454, now seen corresponding path program 1 times [2023-08-29 23:35:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168529559] [2023-08-29 23:35:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:34,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:34,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168529559] [2023-08-29 23:35:34,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168529559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:34,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:34,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:35:34,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715010412] [2023-08-29 23:35:34,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:34,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:35:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:35:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:35:34,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 241 [2023-08-29 23:35:34,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:34,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 241 [2023-08-29 23:35:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:34,125 INFO L130 PetriNetUnfolder]: 176/306 cut-off events. [2023-08-29 23:35:34,125 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:34,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 306 events. 176/306 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1401 event pairs, 172 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 619. Up to 298 conditions per place. [2023-08-29 23:35:34,127 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 21 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-29 23:35:34,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 105 flow [2023-08-29 23:35:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:35:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:35:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-29 23:35:34,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45228215767634855 [2023-08-29 23:35:34,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-29 23:35:34,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-29 23:35:34,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:34,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-29 23:35:34,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,133 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,133 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 327 transitions. [2023-08-29 23:35:34,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 105 flow [2023-08-29 23:35:34,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:34,134 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 62 flow [2023-08-29 23:35:34,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-29 23:35:34,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -10 predicate places. [2023-08-29 23:35:34,136 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 62 flow [2023-08-29 23:35:34,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:34,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:35:34,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:35:34,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:34,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash 504954456, now seen corresponding path program 1 times [2023-08-29 23:35:34,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:34,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716744142] [2023-08-29 23:35:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:34,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716744142] [2023-08-29 23:35:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716744142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:34,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:34,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:35:34,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647543945] [2023-08-29 23:35:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:35:34,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:35:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:35:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 241 [2023-08-29 23:35:34,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:34,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 241 [2023-08-29 23:35:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:34,315 INFO L130 PetriNetUnfolder]: 163/282 cut-off events. [2023-08-29 23:35:34,316 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:34,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 282 events. 163/282 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1226 event pairs, 159 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 572. Up to 274 conditions per place. [2023-08-29 23:35:34,318 INFO L137 encePairwiseOnDemand]: 238/241 looper letters, 19 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-29 23:35:34,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 98 flow [2023-08-29 23:35:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:35:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:35:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-29 23:35:34,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702627939142462 [2023-08-29 23:35:34,321 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-29 23:35:34,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-29 23:35:34,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:34,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-29 23:35:34,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,324 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,324 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 62 flow. Second operand 3 states and 340 transitions. [2023-08-29 23:35:34,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 98 flow [2023-08-29 23:35:34,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:34,325 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 59 flow [2023-08-29 23:35:34,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-29 23:35:34,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-29 23:35:34,326 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 59 flow [2023-08-29 23:35:34,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:34,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:34,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:35:34,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:34,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash -70060904, now seen corresponding path program 1 times [2023-08-29 23:35:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:34,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421692928] [2023-08-29 23:35:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421692928] [2023-08-29 23:35:34,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421692928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:34,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:34,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:35:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947547415] [2023-08-29 23:35:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:35:34,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:35:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:35:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 241 [2023-08-29 23:35:34,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:34,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 241 [2023-08-29 23:35:34,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:34,459 INFO L130 PetriNetUnfolder]: 130/231 cut-off events. [2023-08-29 23:35:34,459 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:34,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 231 events. 130/231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 959 event pairs, 126 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 471. Up to 223 conditions per place. [2023-08-29 23:35:34,461 INFO L137 encePairwiseOnDemand]: 239/241 looper letters, 18 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-29 23:35:34,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 95 flow [2023-08-29 23:35:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:35:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:35:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-29 23:35:34,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508990318118949 [2023-08-29 23:35:34,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-29 23:35:34,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-29 23:35:34,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:34,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-29 23:35:34,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,481 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 59 flow. Second operand 3 states and 326 transitions. [2023-08-29 23:35:34,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 95 flow [2023-08-29 23:35:34,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:34,482 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 58 flow [2023-08-29 23:35:34,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-29 23:35:34,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-29 23:35:34,483 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 58 flow [2023-08-29 23:35:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:34,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:35:34,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:34,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash -70060903, now seen corresponding path program 1 times [2023-08-29 23:35:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671020902] [2023-08-29 23:35:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671020902] [2023-08-29 23:35:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671020902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:34,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:34,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:35:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283634598] [2023-08-29 23:35:34,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:34,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:35:34,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:35:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:35:34,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 241 [2023-08-29 23:35:34,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:34,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 241 [2023-08-29 23:35:34,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:34,687 INFO L130 PetriNetUnfolder]: 97/180 cut-off events. [2023-08-29 23:35:34,687 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:34,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 180 events. 97/180 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 696 event pairs, 93 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 370. Up to 172 conditions per place. [2023-08-29 23:35:34,689 INFO L137 encePairwiseOnDemand]: 239/241 looper letters, 17 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-29 23:35:34,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 92 flow [2023-08-29 23:35:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:35:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:35:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-29 23:35:34,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41217150760719223 [2023-08-29 23:35:34,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-29 23:35:34,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-29 23:35:34,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:34,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-29 23:35:34,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,694 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 58 flow. Second operand 3 states and 298 transitions. [2023-08-29 23:35:34,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 92 flow [2023-08-29 23:35:34,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:34,695 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 57 flow [2023-08-29 23:35:34,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-29 23:35:34,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -11 predicate places. [2023-08-29 23:35:34,696 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 57 flow [2023-08-29 23:35:34,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:34,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:34,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:34,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:35:34,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:34,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1375800109, now seen corresponding path program 1 times [2023-08-29 23:35:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484536716] [2023-08-29 23:35:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:35,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:35,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484536716] [2023-08-29 23:35:35,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484536716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:35,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:35,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:35:35,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148872724] [2023-08-29 23:35:35,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:35,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:35:35,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:35:35,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:35:35,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 241 [2023-08-29 23:35:35,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:35,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 241 [2023-08-29 23:35:35,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:35,160 INFO L130 PetriNetUnfolder]: 109/187 cut-off events. [2023-08-29 23:35:35,160 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:35:35,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 187 events. 109/187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 699 event pairs, 6 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 391. Up to 85 conditions per place. [2023-08-29 23:35:35,162 INFO L137 encePairwiseOnDemand]: 237/241 looper letters, 30 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2023-08-29 23:35:35,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 155 flow [2023-08-29 23:35:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:35:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:35:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-08-29 23:35:35,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47199170124481327 [2023-08-29 23:35:35,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-08-29 23:35:35,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-08-29 23:35:35,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:35,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-08-29 23:35:35,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 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) [2023-08-29 23:35:35,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 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) [2023-08-29 23:35:35,168 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 57 flow. Second operand 4 states and 455 transitions. [2023-08-29 23:35:35,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 155 flow [2023-08-29 23:35:35,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:35:35,170 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 74 flow [2023-08-29 23:35:35,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-29 23:35:35,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -8 predicate places. [2023-08-29 23:35:35,174 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 74 flow [2023-08-29 23:35:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:35,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:35,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 23:35:35,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:35,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1117417239, now seen corresponding path program 2 times [2023-08-29 23:35:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:35,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264925981] [2023-08-29 23:35:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:35,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264925981] [2023-08-29 23:35:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264925981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:35,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:35,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:35:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145050991] [2023-08-29 23:35:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:35,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:35:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:35:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:35:35,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 241 [2023-08-29 23:35:35,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:35,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 241 [2023-08-29 23:35:35,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:35,611 INFO L130 PetriNetUnfolder]: 98/172 cut-off events. [2023-08-29 23:35:35,611 INFO L131 PetriNetUnfolder]: For 19/32 co-relation queries the response was YES. [2023-08-29 23:35:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392 conditions, 172 events. 98/172 cut-off events. For 19/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 487 event pairs, 9 based on Foata normal form. 13/175 useless extension candidates. Maximal degree in co-relation 386. Up to 103 conditions per place. [2023-08-29 23:35:35,613 INFO L137 encePairwiseOnDemand]: 237/241 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-29 23:35:35,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 165 flow [2023-08-29 23:35:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:35:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:35:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-29 23:35:35,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678423236514523 [2023-08-29 23:35:35,615 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-29 23:35:35,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-29 23:35:35,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:35,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-29 23:35:35,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 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) [2023-08-29 23:35:35,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 241.0) internal successors, (1205), 5 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) [2023-08-29 23:35:35,618 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 74 flow. Second operand 4 states and 451 transitions. [2023-08-29 23:35:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 165 flow [2023-08-29 23:35:35,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:35,620 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-08-29 23:35:35,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-29 23:35:35,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-08-29 23:35:35,621 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-08-29 23:35:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:35,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:35:35,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:35,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash -887585303, now seen corresponding path program 3 times [2023-08-29 23:35:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:35,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441376794] [2023-08-29 23:35:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:35,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441376794] [2023-08-29 23:35:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441376794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:35,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:35:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950767660] [2023-08-29 23:35:35,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:35:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:35:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:35:35,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 241 [2023-08-29 23:35:35,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:35,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 241 [2023-08-29 23:35:35,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:35,986 INFO L130 PetriNetUnfolder]: 122/214 cut-off events. [2023-08-29 23:35:35,986 INFO L131 PetriNetUnfolder]: For 81/91 co-relation queries the response was YES. [2023-08-29 23:35:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 214 events. 122/214 cut-off events. For 81/91 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 649 event pairs, 13 based on Foata normal form. 18/232 useless extension candidates. Maximal degree in co-relation 526. Up to 71 conditions per place. [2023-08-29 23:35:35,988 INFO L137 encePairwiseOnDemand]: 235/241 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2023-08-29 23:35:35,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 210 flow [2023-08-29 23:35:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 23:35:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 23:35:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 557 transitions. [2023-08-29 23:35:35,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46224066390041496 [2023-08-29 23:35:35,990 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 557 transitions. [2023-08-29 23:35:35,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 557 transitions. [2023-08-29 23:35:35,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:35,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 557 transitions. [2023-08-29 23:35:35,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 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) [2023-08-29 23:35:35,994 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 241.0) internal successors, (1446), 6 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) [2023-08-29 23:35:35,994 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 5 states and 557 transitions. [2023-08-29 23:35:35,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 210 flow [2023-08-29 23:35:35,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:35:35,998 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 132 flow [2023-08-29 23:35:35,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-29 23:35:35,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-29 23:35:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 132 flow [2023-08-29 23:35:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:35,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:36,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:35:36,001 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:36,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1479768159, now seen corresponding path program 4 times [2023-08-29 23:35:36,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:36,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097734250] [2023-08-29 23:35:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:36,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:36,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:36,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097734250] [2023-08-29 23:35:36,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097734250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:36,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:36,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 23:35:36,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060743717] [2023-08-29 23:35:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:36,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:35:36,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:36,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:35:36,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:35:36,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 241 [2023-08-29 23:35:36,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:36,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 241 [2023-08-29 23:35:36,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:36,407 INFO L130 PetriNetUnfolder]: 213/366 cut-off events. [2023-08-29 23:35:36,408 INFO L131 PetriNetUnfolder]: For 374/387 co-relation queries the response was YES. [2023-08-29 23:35:36,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021 conditions, 366 events. 213/366 cut-off events. For 374/387 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1333 event pairs, 13 based on Foata normal form. 27/393 useless extension candidates. Maximal degree in co-relation 1012. Up to 202 conditions per place. [2023-08-29 23:35:36,410 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 30 selfloop transitions, 3 changer transitions 24/60 dead transitions. [2023-08-29 23:35:36,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 368 flow [2023-08-29 23:35:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:35:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:35:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 772 transitions. [2023-08-29 23:35:36,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576170717249555 [2023-08-29 23:35:36,413 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 772 transitions. [2023-08-29 23:35:36,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 772 transitions. [2023-08-29 23:35:36,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:36,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 772 transitions. [2023-08-29 23:35:36,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 241.0) internal successors, (1928), 8 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,419 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 241.0) internal successors, (1928), 8 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,419 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 132 flow. Second operand 7 states and 772 transitions. [2023-08-29 23:35:36,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 368 flow [2023-08-29 23:35:36,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:35:36,424 INFO L231 Difference]: Finished difference. Result has 53 places, 30 transitions, 161 flow [2023-08-29 23:35:36,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=53, PETRI_TRANSITIONS=30} [2023-08-29 23:35:36,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-29 23:35:36,425 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 30 transitions, 161 flow [2023-08-29 23:35:36,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:36,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:36,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 23:35:36,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:36,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash 713292988, now seen corresponding path program 1 times [2023-08-29 23:35:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445620387] [2023-08-29 23:35:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445620387] [2023-08-29 23:35:36,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445620387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:36,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:36,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:35:36,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409034665] [2023-08-29 23:35:36,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:36,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:35:36,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:36,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:35:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:35:36,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 241 [2023-08-29 23:35:36,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 30 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:36,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 241 [2023-08-29 23:35:36,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:36,961 INFO L130 PetriNetUnfolder]: 246/409 cut-off events. [2023-08-29 23:35:36,961 INFO L131 PetriNetUnfolder]: For 720/720 co-relation queries the response was YES. [2023-08-29 23:35:36,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 409 events. 246/409 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1274 event pairs, 0 based on Foata normal form. 20/429 useless extension candidates. Maximal degree in co-relation 1511. Up to 137 conditions per place. [2023-08-29 23:35:36,964 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 61 selfloop transitions, 17 changer transitions 8/86 dead transitions. [2023-08-29 23:35:36,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 599 flow [2023-08-29 23:35:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 23:35:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 23:35:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 989 transitions. [2023-08-29 23:35:36,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45597049331489165 [2023-08-29 23:35:36,967 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 989 transitions. [2023-08-29 23:35:36,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 989 transitions. [2023-08-29 23:35:36,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:36,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 989 transitions. [2023-08-29 23:35:36,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.88888888888889) internal successors, (989), 9 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,975 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 241.0) internal successors, (2410), 10 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,975 INFO L175 Difference]: Start difference. First operand has 53 places, 30 transitions, 161 flow. Second operand 9 states and 989 transitions. [2023-08-29 23:35:36,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 599 flow [2023-08-29 23:35:36,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 570 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-29 23:35:36,980 INFO L231 Difference]: Finished difference. Result has 60 places, 40 transitions, 294 flow [2023-08-29 23:35:36,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=294, PETRI_PLACES=60, PETRI_TRANSITIONS=40} [2023-08-29 23:35:36,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2023-08-29 23:35:36,981 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 40 transitions, 294 flow [2023-08-29 23:35:36,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:36,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:36,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:36,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 23:35:36,982 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:36,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash 997634328, now seen corresponding path program 2 times [2023-08-29 23:35:36,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:36,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115914358] [2023-08-29 23:35:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:36,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:37,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115914358] [2023-08-29 23:35:37,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115914358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:37,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:37,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:35:37,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823073567] [2023-08-29 23:35:37,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:37,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:35:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:35:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:35:37,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 241 [2023-08-29 23:35:37,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 40 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:37,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 241 [2023-08-29 23:35:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:37,467 INFO L130 PetriNetUnfolder]: 287/537 cut-off events. [2023-08-29 23:35:37,467 INFO L131 PetriNetUnfolder]: For 2643/2670 co-relation queries the response was YES. [2023-08-29 23:35:37,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 537 events. 287/537 cut-off events. For 2643/2670 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2260 event pairs, 20 based on Foata normal form. 49/584 useless extension candidates. Maximal degree in co-relation 2440. Up to 271 conditions per place. [2023-08-29 23:35:37,471 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 41 selfloop transitions, 5 changer transitions 40/94 dead transitions. [2023-08-29 23:35:37,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 834 flow [2023-08-29 23:35:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:35:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:35:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 883 transitions. [2023-08-29 23:35:37,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579875518672199 [2023-08-29 23:35:37,474 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 883 transitions. [2023-08-29 23:35:37,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 883 transitions. [2023-08-29 23:35:37,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:37,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 883 transitions. [2023-08-29 23:35:37,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 110.375) internal successors, (883), 8 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,480 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,480 INFO L175 Difference]: Start difference. First operand has 60 places, 40 transitions, 294 flow. Second operand 8 states and 883 transitions. [2023-08-29 23:35:37,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 834 flow [2023-08-29 23:35:37,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 789 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-29 23:35:37,488 INFO L231 Difference]: Finished difference. Result has 68 places, 42 transitions, 336 flow [2023-08-29 23:35:37,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=42} [2023-08-29 23:35:37,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2023-08-29 23:35:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 42 transitions, 336 flow [2023-08-29 23:35:37,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:37,489 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] [2023-08-29 23:35:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 23:35:37,489 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:37,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1824714705, now seen corresponding path program 1 times [2023-08-29 23:35:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:37,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879881207] [2023-08-29 23:35:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:37,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:37,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:37,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879881207] [2023-08-29 23:35:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879881207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:35:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:35:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 23:35:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340176612] [2023-08-29 23:35:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:35:37,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 23:35:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 23:35:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-29 23:35:37,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 241 [2023-08-29 23:35:37,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 42 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:37,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 241 [2023-08-29 23:35:37,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:37,944 INFO L130 PetriNetUnfolder]: 298/530 cut-off events. [2023-08-29 23:35:37,944 INFO L131 PetriNetUnfolder]: For 4458/4493 co-relation queries the response was YES. [2023-08-29 23:35:37,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2902 conditions, 530 events. 298/530 cut-off events. For 4458/4493 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2080 event pairs, 25 based on Foata normal form. 49/574 useless extension candidates. Maximal degree in co-relation 2880. Up to 317 conditions per place. [2023-08-29 23:35:37,949 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 43 selfloop transitions, 5 changer transitions 30/84 dead transitions. [2023-08-29 23:35:37,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 881 flow [2023-08-29 23:35:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-29 23:35:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-29 23:35:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 873 transitions. [2023-08-29 23:35:37,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528008298755187 [2023-08-29 23:35:37,952 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 873 transitions. [2023-08-29 23:35:37,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 873 transitions. [2023-08-29 23:35:37,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:37,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 873 transitions. [2023-08-29 23:35:37,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 109.125) internal successors, (873), 8 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,957 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 241.0) internal successors, (2169), 9 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,958 INFO L175 Difference]: Start difference. First operand has 68 places, 42 transitions, 336 flow. Second operand 8 states and 873 transitions. [2023-08-29 23:35:37,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 881 flow [2023-08-29 23:35:37,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 842 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-29 23:35:37,968 INFO L231 Difference]: Finished difference. Result has 72 places, 44 transitions, 386 flow [2023-08-29 23:35:37,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=72, PETRI_TRANSITIONS=44} [2023-08-29 23:35:37,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2023-08-29 23:35:37,969 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 44 transitions, 386 flow [2023-08-29 23:35:37,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:37,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:37,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 23:35:37,970 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:37,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash 406016123, now seen corresponding path program 3 times [2023-08-29 23:35:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:37,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411952518] [2023-08-29 23:35:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:37,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:38,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411952518] [2023-08-29 23:35:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411952518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:35:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741716412] [2023-08-29 23:35:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:35:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:38,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:35:38,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 23:35:38,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-29 23:35:38,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:35:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:35:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:38,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:35:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741716412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:35:39,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:35:39,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-29 23:35:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59744908] [2023-08-29 23:35:39,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:35:39,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:35:39,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:35:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:35:39,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 241 [2023-08-29 23:35:39,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 44 transitions, 386 flow. Second operand has 15 states, 15 states have (on average 100.6) internal successors, (1509), 15 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:39,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:39,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 241 [2023-08-29 23:35:39,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:40,630 INFO L130 PetriNetUnfolder]: 766/1309 cut-off events. [2023-08-29 23:35:40,630 INFO L131 PetriNetUnfolder]: For 13813/13813 co-relation queries the response was YES. [2023-08-29 23:35:40,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7696 conditions, 1309 events. 766/1309 cut-off events. For 13813/13813 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5895 event pairs, 17 based on Foata normal form. 112/1421 useless extension candidates. Maximal degree in co-relation 7671. Up to 367 conditions per place. [2023-08-29 23:35:40,642 INFO L137 encePairwiseOnDemand]: 231/241 looper letters, 121 selfloop transitions, 49 changer transitions 132/302 dead transitions. [2023-08-29 23:35:40,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 302 transitions, 3484 flow [2023-08-29 23:35:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-29 23:35:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-29 23:35:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4363 transitions. [2023-08-29 23:35:40,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310412961865244 [2023-08-29 23:35:40,654 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4363 transitions. [2023-08-29 23:35:40,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4363 transitions. [2023-08-29 23:35:40,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:40,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4363 transitions. [2023-08-29 23:35:40,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 103.88095238095238) internal successors, (4363), 42 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:40,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 241.0) internal successors, (10363), 43 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:40,682 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 241.0) internal successors, (10363), 43 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:40,682 INFO L175 Difference]: Start difference. First operand has 72 places, 44 transitions, 386 flow. Second operand 42 states and 4363 transitions. [2023-08-29 23:35:40,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 302 transitions, 3484 flow [2023-08-29 23:35:40,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 302 transitions, 3157 flow, removed 159 selfloop flow, removed 6 redundant places. [2023-08-29 23:35:40,711 INFO L231 Difference]: Finished difference. Result has 129 places, 80 transitions, 1067 flow [2023-08-29 23:35:40,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1067, PETRI_PLACES=129, PETRI_TRANSITIONS=80} [2023-08-29 23:35:40,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2023-08-29 23:35:40,712 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 80 transitions, 1067 flow [2023-08-29 23:35:40,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 100.6) internal successors, (1509), 15 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:40,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:40,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:40,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:40,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 23:35:40,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:40,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash -516671809, now seen corresponding path program 2 times [2023-08-29 23:35:40,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:40,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705672954] [2023-08-29 23:35:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:40,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705672954] [2023-08-29 23:35:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705672954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:35:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948409071] [2023-08-29 23:35:41,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:35:41,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:41,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:41,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:35:41,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 23:35:41,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:35:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:35:41,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-29 23:35:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:41,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:35:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:41,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948409071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:35:41,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:35:41,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-29 23:35:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228870785] [2023-08-29 23:35:41,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:35:41,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 23:35:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 23:35:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-08-29 23:35:41,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 241 [2023-08-29 23:35:41,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 80 transitions, 1067 flow. Second operand has 15 states, 15 states have (on average 100.6) internal successors, (1509), 15 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:41,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:41,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 241 [2023-08-29 23:35:41,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:43,234 INFO L130 PetriNetUnfolder]: 977/1652 cut-off events. [2023-08-29 23:35:43,234 INFO L131 PetriNetUnfolder]: For 37620/37620 co-relation queries the response was YES. [2023-08-29 23:35:43,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11556 conditions, 1652 events. 977/1652 cut-off events. For 37620/37620 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7681 event pairs, 37 based on Foata normal form. 86/1738 useless extension candidates. Maximal degree in co-relation 11509. Up to 449 conditions per place. [2023-08-29 23:35:43,257 INFO L137 encePairwiseOnDemand]: 231/241 looper letters, 144 selfloop transitions, 59 changer transitions 103/306 dead transitions. [2023-08-29 23:35:43,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 306 transitions, 4197 flow [2023-08-29 23:35:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-29 23:35:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-29 23:35:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3943 transitions. [2023-08-29 23:35:43,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305525223848002 [2023-08-29 23:35:43,266 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3943 transitions. [2023-08-29 23:35:43,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3943 transitions. [2023-08-29 23:35:43,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:43,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3943 transitions. [2023-08-29 23:35:43,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 103.76315789473684) internal successors, (3943), 38 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:43,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 241.0) internal successors, (9399), 39 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:43,304 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 241.0) internal successors, (9399), 39 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:43,305 INFO L175 Difference]: Start difference. First operand has 129 places, 80 transitions, 1067 flow. Second operand 38 states and 3943 transitions. [2023-08-29 23:35:43,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 306 transitions, 4197 flow [2023-08-29 23:35:43,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 306 transitions, 2819 flow, removed 609 selfloop flow, removed 29 redundant places. [2023-08-29 23:35:43,437 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1169 flow [2023-08-29 23:35:43,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1169, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2023-08-29 23:35:43,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2023-08-29 23:35:43,439 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1169 flow [2023-08-29 23:35:43,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 100.6) internal successors, (1509), 15 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:43,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:43,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:43,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:43,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-29 23:35:43,646 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:43,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1756267247, now seen corresponding path program 1 times [2023-08-29 23:35:43,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:43,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447807883] [2023-08-29 23:35:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447807883] [2023-08-29 23:35:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447807883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:35:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238804912] [2023-08-29 23:35:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:44,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:44,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:35:44,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 23:35:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:35:44,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:44,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:35:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:44,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238804912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:35:44,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:35:44,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-29 23:35:44,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195411481] [2023-08-29 23:35:44,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:35:44,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:35:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:35:44,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:35:45,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:35:45,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1169 flow. Second operand has 19 states, 19 states have (on average 100.73684210526316) internal successors, (1914), 19 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:45,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:45,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:35:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:46,623 INFO L130 PetriNetUnfolder]: 970/1756 cut-off events. [2023-08-29 23:35:46,624 INFO L131 PetriNetUnfolder]: For 34551/34585 co-relation queries the response was YES. [2023-08-29 23:35:46,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10881 conditions, 1756 events. 970/1756 cut-off events. For 34551/34585 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9440 event pairs, 0 based on Foata normal form. 108/1840 useless extension candidates. Maximal degree in co-relation 10835. Up to 360 conditions per place. [2023-08-29 23:35:46,643 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 131 selfloop transitions, 89 changer transitions 96/328 dead transitions. [2023-08-29 23:35:46,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 328 transitions, 3899 flow [2023-08-29 23:35:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 23:35:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 23:35:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3758 transitions. [2023-08-29 23:35:46,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331489165514062 [2023-08-29 23:35:46,650 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3758 transitions. [2023-08-29 23:35:46,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3758 transitions. [2023-08-29 23:35:46,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:46,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3758 transitions. [2023-08-29 23:35:46,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.38888888888889) internal successors, (3758), 36 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:46,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 241.0) internal successors, (8917), 37 states have internal predecessors, (8917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:46,668 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 241.0) internal successors, (8917), 37 states have internal predecessors, (8917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:46,668 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1169 flow. Second operand 36 states and 3758 transitions. [2023-08-29 23:35:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 328 transitions, 3899 flow [2023-08-29 23:35:46,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 328 transitions, 3123 flow, removed 382 selfloop flow, removed 20 redundant places. [2023-08-29 23:35:46,737 INFO L231 Difference]: Finished difference. Result has 142 places, 134 transitions, 1435 flow [2023-08-29 23:35:46,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1435, PETRI_PLACES=142, PETRI_TRANSITIONS=134} [2023-08-29 23:35:46,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2023-08-29 23:35:46,738 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 134 transitions, 1435 flow [2023-08-29 23:35:46,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.73684210526316) internal successors, (1914), 19 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:46,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:46,739 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:46,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:46,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:46,945 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:46,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:46,946 INFO L85 PathProgramCache]: Analyzing trace with hash 421416188, now seen corresponding path program 2 times [2023-08-29 23:35:46,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:46,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423501151] [2023-08-29 23:35:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:47,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:47,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423501151] [2023-08-29 23:35:47,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423501151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:35:47,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602582875] [2023-08-29 23:35:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:35:47,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:47,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:35:47,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 23:35:47,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:35:47,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:35:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 23:35:47,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:47,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:35:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:48,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602582875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:35:48,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:35:48,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-29 23:35:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204838562] [2023-08-29 23:35:48,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:35:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-29 23:35:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-29 23:35:48,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-29 23:35:48,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:35:48,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 134 transitions, 1435 flow. Second operand has 19 states, 19 states have (on average 100.73684210526316) internal successors, (1914), 19 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:48,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:48,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:35:48,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:49,857 INFO L130 PetriNetUnfolder]: 1157/2091 cut-off events. [2023-08-29 23:35:49,857 INFO L131 PetriNetUnfolder]: For 19718/19735 co-relation queries the response was YES. [2023-08-29 23:35:49,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11911 conditions, 2091 events. 1157/2091 cut-off events. For 19718/19735 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11101 event pairs, 20 based on Foata normal form. 99/2178 useless extension candidates. Maximal degree in co-relation 11870. Up to 390 conditions per place. [2023-08-29 23:35:49,876 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 144 selfloop transitions, 89 changer transitions 103/351 dead transitions. [2023-08-29 23:35:49,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 351 transitions, 4013 flow [2023-08-29 23:35:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 23:35:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 23:35:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3465 transitions. [2023-08-29 23:35:49,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43568464730290457 [2023-08-29 23:35:49,881 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3465 transitions. [2023-08-29 23:35:49,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3465 transitions. [2023-08-29 23:35:49,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:49,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3465 transitions. [2023-08-29 23:35:49,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.0) internal successors, (3465), 33 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 241.0) internal successors, (8194), 34 states have internal predecessors, (8194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,895 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 241.0) internal successors, (8194), 34 states have internal predecessors, (8194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,895 INFO L175 Difference]: Start difference. First operand has 142 places, 134 transitions, 1435 flow. Second operand 33 states and 3465 transitions. [2023-08-29 23:35:49,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 351 transitions, 4013 flow [2023-08-29 23:35:49,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 351 transitions, 3457 flow, removed 254 selfloop flow, removed 21 redundant places. [2023-08-29 23:35:49,965 INFO L231 Difference]: Finished difference. Result has 148 places, 151 transitions, 1736 flow [2023-08-29 23:35:49,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1736, PETRI_PLACES=148, PETRI_TRANSITIONS=151} [2023-08-29 23:35:49,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2023-08-29 23:35:49,966 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 151 transitions, 1736 flow [2023-08-29 23:35:49,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.73684210526316) internal successors, (1914), 19 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:49,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:49,967 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:49,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:50,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 23:35:50,172 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:50,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1609318232, now seen corresponding path program 3 times [2023-08-29 23:35:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:50,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577860024] [2023-08-29 23:35:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:50,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:50,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577860024] [2023-08-29 23:35:50,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577860024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:35:50,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091048085] [2023-08-29 23:35:50,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:35:50,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:50,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:50,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:35:50,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 23:35:50,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-29 23:35:50,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:35:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:35:50,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:51,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:35:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091048085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:35:51,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:35:51,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-29 23:35:51,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832075399] [2023-08-29 23:35:51,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:35:51,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:35:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:35:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:35:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:35:52,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 151 transitions, 1736 flow. Second operand has 20 states, 20 states have (on average 100.55) internal successors, (2011), 20 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:52,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:52,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:35:52,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:54,181 INFO L130 PetriNetUnfolder]: 1514/2748 cut-off events. [2023-08-29 23:35:54,181 INFO L131 PetriNetUnfolder]: For 30910/30972 co-relation queries the response was YES. [2023-08-29 23:35:54,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 2748 events. 1514/2748 cut-off events. For 30910/30972 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15861 event pairs, 30 based on Foata normal form. 128/2846 useless extension candidates. Maximal degree in co-relation 16961. Up to 600 conditions per place. [2023-08-29 23:35:54,200 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 203 selfloop transitions, 127 changer transitions 126/469 dead transitions. [2023-08-29 23:35:54,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 469 transitions, 6106 flow [2023-08-29 23:35:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-29 23:35:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-29 23:35:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5217 transitions. [2023-08-29 23:35:54,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43294605809128633 [2023-08-29 23:35:54,207 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5217 transitions. [2023-08-29 23:35:54,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5217 transitions. [2023-08-29 23:35:54,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:54,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5217 transitions. [2023-08-29 23:35:54,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 104.34) internal successors, (5217), 50 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:54,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 241.0) internal successors, (12291), 51 states have internal predecessors, (12291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:54,227 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 241.0) internal successors, (12291), 51 states have internal predecessors, (12291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:54,227 INFO L175 Difference]: Start difference. First operand has 148 places, 151 transitions, 1736 flow. Second operand 50 states and 5217 transitions. [2023-08-29 23:35:54,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 469 transitions, 6106 flow [2023-08-29 23:35:54,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 469 transitions, 5661 flow, removed 205 selfloop flow, removed 13 redundant places. [2023-08-29 23:35:54,361 INFO L231 Difference]: Finished difference. Result has 181 places, 212 transitions, 2733 flow [2023-08-29 23:35:54,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=2733, PETRI_PLACES=181, PETRI_TRANSITIONS=212} [2023-08-29 23:35:54,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2023-08-29 23:35:54,361 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 212 transitions, 2733 flow [2023-08-29 23:35:54,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.55) internal successors, (2011), 20 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:54,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:54,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:54,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:54,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:54,568 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:54,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1715267220, now seen corresponding path program 4 times [2023-08-29 23:35:54,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:54,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549482178] [2023-08-29 23:35:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:35:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:35:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549482178] [2023-08-29 23:35:55,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549482178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:35:55,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082326860] [2023-08-29 23:35:55,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:35:55,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:55,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:35:55,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:35:55,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 23:35:55,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:35:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:35:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-29 23:35:55,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:35:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:55,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:35:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:35:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082326860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:35:56,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:35:56,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-29 23:35:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272537495] [2023-08-29 23:35:56,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:35:56,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:35:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:35:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:35:56,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:35:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:35:56,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 212 transitions, 2733 flow. Second operand has 20 states, 20 states have (on average 100.55) internal successors, (2011), 20 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:56,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:35:56,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:35:56,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:35:59,047 INFO L130 PetriNetUnfolder]: 2069/3829 cut-off events. [2023-08-29 23:35:59,047 INFO L131 PetriNetUnfolder]: For 54394/54415 co-relation queries the response was YES. [2023-08-29 23:35:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25175 conditions, 3829 events. 2069/3829 cut-off events. For 54394/54415 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 23727 event pairs, 90 based on Foata normal form. 159/3966 useless extension candidates. Maximal degree in co-relation 25129. Up to 698 conditions per place. [2023-08-29 23:35:59,083 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 271 selfloop transitions, 145 changer transitions 202/643 dead transitions. [2023-08-29 23:35:59,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 643 transitions, 8527 flow [2023-08-29 23:35:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-29 23:35:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-29 23:35:59,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 6094 transitions. [2023-08-29 23:35:59,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359708112748605 [2023-08-29 23:35:59,090 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 6094 transitions. [2023-08-29 23:35:59,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 6094 transitions. [2023-08-29 23:35:59,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:35:59,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 6094 transitions. [2023-08-29 23:35:59,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 105.06896551724138) internal successors, (6094), 58 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:59,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 241.0) internal successors, (14219), 59 states have internal predecessors, (14219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:59,114 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 241.0) internal successors, (14219), 59 states have internal predecessors, (14219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:59,115 INFO L175 Difference]: Start difference. First operand has 181 places, 212 transitions, 2733 flow. Second operand 58 states and 6094 transitions. [2023-08-29 23:35:59,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 643 transitions, 8527 flow [2023-08-29 23:35:59,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 643 transitions, 7615 flow, removed 428 selfloop flow, removed 18 redundant places. [2023-08-29 23:35:59,331 INFO L231 Difference]: Finished difference. Result has 217 places, 277 transitions, 3739 flow [2023-08-29 23:35:59,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=3739, PETRI_PLACES=217, PETRI_TRANSITIONS=277} [2023-08-29 23:35:59,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2023-08-29 23:35:59,332 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 277 transitions, 3739 flow [2023-08-29 23:35:59,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.55) internal successors, (2011), 20 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:35:59,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:35:59,333 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:35:59,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:35:59,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:35:59,537 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:35:59,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:35:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2030745743, now seen corresponding path program 5 times [2023-08-29 23:35:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:35:59,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864190448] [2023-08-29 23:35:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:35:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:35:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:36:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864190448] [2023-08-29 23:36:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864190448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:36:00,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456769654] [2023-08-29 23:36:00,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:36:00,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:00,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:36:00,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:36:00,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 23:36:00,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-29 23:36:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:36:00,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:36:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:00,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:01,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456769654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:01,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:36:01,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-29 23:36:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185781230] [2023-08-29 23:36:01,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:36:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:36:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:36:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:36:02,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:36:02,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 277 transitions, 3739 flow. Second operand has 25 states, 25 states have (on average 100.56) internal successors, (2514), 25 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:02,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:02,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:36:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:06,583 INFO L130 PetriNetUnfolder]: 2806/5110 cut-off events. [2023-08-29 23:36:06,583 INFO L131 PetriNetUnfolder]: For 88284/88350 co-relation queries the response was YES. [2023-08-29 23:36:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36246 conditions, 5110 events. 2806/5110 cut-off events. For 88284/88350 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 33290 event pairs, 64 based on Foata normal form. 196/5210 useless extension candidates. Maximal degree in co-relation 36195. Up to 1116 conditions per place. [2023-08-29 23:36:06,638 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 317 selfloop transitions, 231 changer transitions 235/807 dead transitions. [2023-08-29 23:36:06,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 807 transitions, 12241 flow [2023-08-29 23:36:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-29 23:36:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-29 23:36:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 8032 transitions. [2023-08-29 23:36:06,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328285822061756 [2023-08-29 23:36:06,647 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 8032 transitions. [2023-08-29 23:36:06,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 8032 transitions. [2023-08-29 23:36:06,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:36:06,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 8032 transitions. [2023-08-29 23:36:06,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 104.31168831168831) internal successors, (8032), 77 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:06,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 241.0) internal successors, (18798), 78 states have internal predecessors, (18798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:06,677 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 241.0) internal successors, (18798), 78 states have internal predecessors, (18798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:06,677 INFO L175 Difference]: Start difference. First operand has 217 places, 277 transitions, 3739 flow. Second operand 77 states and 8032 transitions. [2023-08-29 23:36:06,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 807 transitions, 12241 flow [2023-08-29 23:36:07,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 807 transitions, 10968 flow, removed 609 selfloop flow, removed 23 redundant places. [2023-08-29 23:36:07,065 INFO L231 Difference]: Finished difference. Result has 271 places, 377 transitions, 5516 flow [2023-08-29 23:36:07,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=5516, PETRI_PLACES=271, PETRI_TRANSITIONS=377} [2023-08-29 23:36:07,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2023-08-29 23:36:07,067 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 377 transitions, 5516 flow [2023-08-29 23:36:07,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 100.56) internal successors, (2514), 25 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:07,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:36:07,067 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:36:07,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:36:07,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:07,343 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:36:07,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:36:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1662703076, now seen corresponding path program 6 times [2023-08-29 23:36:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:36:07,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443455605] [2023-08-29 23:36:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:36:07,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:36:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:36:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443455605] [2023-08-29 23:36:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443455605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:36:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907492794] [2023-08-29 23:36:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:36:07,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:36:07,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:36:07,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 23:36:08,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:36:08,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:36:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:36:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:08,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:10,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907492794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:10,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:36:10,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-29 23:36:10,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110706665] [2023-08-29 23:36:10,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:10,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:36:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:36:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:36:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:36:10,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:36:10,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 377 transitions, 5516 flow. Second operand has 25 states, 25 states have (on average 97.88) internal successors, (2447), 25 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:10,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:10,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:36:10,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:16,221 INFO L130 PetriNetUnfolder]: 4503/7522 cut-off events. [2023-08-29 23:36:16,221 INFO L131 PetriNetUnfolder]: For 130156/130156 co-relation queries the response was YES. [2023-08-29 23:36:16,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49005 conditions, 7522 events. 4503/7522 cut-off events. For 130156/130156 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 45701 event pairs, 223 based on Foata normal form. 238/7760 useless extension candidates. Maximal degree in co-relation 48944. Up to 1830 conditions per place. [2023-08-29 23:36:16,388 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 419 selfloop transitions, 274 changer transitions 241/934 dead transitions. [2023-08-29 23:36:16,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 934 transitions, 14186 flow [2023-08-29 23:36:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-29 23:36:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-29 23:36:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 9037 transitions. [2023-08-29 23:36:16,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213250034966665 [2023-08-29 23:36:16,399 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 9037 transitions. [2023-08-29 23:36:16,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 9037 transitions. [2023-08-29 23:36:16,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:36:16,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 9037 transitions. [2023-08-29 23:36:16,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 101.53932584269663) internal successors, (9037), 89 states have internal predecessors, (9037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:16,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 241.0) internal successors, (21690), 90 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:16,433 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 241.0) internal successors, (21690), 90 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:16,433 INFO L175 Difference]: Start difference. First operand has 271 places, 377 transitions, 5516 flow. Second operand 89 states and 9037 transitions. [2023-08-29 23:36:16,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 934 transitions, 14186 flow [2023-08-29 23:36:16,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 934 transitions, 12387 flow, removed 863 selfloop flow, removed 32 redundant places. [2023-08-29 23:36:16,922 INFO L231 Difference]: Finished difference. Result has 346 places, 461 transitions, 7074 flow [2023-08-29 23:36:16,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=7074, PETRI_PLACES=346, PETRI_TRANSITIONS=461} [2023-08-29 23:36:16,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2023-08-29 23:36:16,923 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 461 transitions, 7074 flow [2023-08-29 23:36:16,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.88) internal successors, (2447), 25 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:16,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:36:16,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:36:16,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 23:36:17,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-29 23:36:17,125 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:36:17,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:36:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash -22854786, now seen corresponding path program 7 times [2023-08-29 23:36:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:36:17,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84110599] [2023-08-29 23:36:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:36:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:36:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:17,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:36:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84110599] [2023-08-29 23:36:17,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84110599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:36:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178307107] [2023-08-29 23:36:17,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:36:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:17,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:36:17,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:36:17,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 23:36:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:36:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:18,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:19,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178307107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:19,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:36:19,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-29 23:36:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802155158] [2023-08-29 23:36:19,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:19,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:36:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:36:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:36:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:36:19,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:36:19,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 461 transitions, 7074 flow. Second operand has 24 states, 24 states have (on average 100.125) internal successors, (2403), 24 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:19,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:19,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:36:19,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:24,964 INFO L130 PetriNetUnfolder]: 4261/7933 cut-off events. [2023-08-29 23:36:24,964 INFO L131 PetriNetUnfolder]: For 479766/479777 co-relation queries the response was YES. [2023-08-29 23:36:25,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73952 conditions, 7933 events. 4261/7933 cut-off events. For 479766/479777 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 57327 event pairs, 168 based on Foata normal form. 327/8210 useless extension candidates. Maximal degree in co-relation 73858. Up to 1490 conditions per place. [2023-08-29 23:36:25,064 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 406 selfloop transitions, 342 changer transitions 320/1109 dead transitions. [2023-08-29 23:36:25,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1109 transitions, 19270 flow [2023-08-29 23:36:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-29 23:36:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-29 23:36:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 8299 transitions. [2023-08-29 23:36:25,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43589474237092285 [2023-08-29 23:36:25,073 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 8299 transitions. [2023-08-29 23:36:25,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 8299 transitions. [2023-08-29 23:36:25,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:36:25,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 8299 transitions. [2023-08-29 23:36:25,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 105.0506329113924) internal successors, (8299), 79 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:25,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 241.0) internal successors, (19280), 80 states have internal predecessors, (19280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:25,101 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 241.0) internal successors, (19280), 80 states have internal predecessors, (19280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:25,101 INFO L175 Difference]: Start difference. First operand has 346 places, 461 transitions, 7074 flow. Second operand 79 states and 8299 transitions. [2023-08-29 23:36:25,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1109 transitions, 19270 flow [2023-08-29 23:36:26,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1109 transitions, 15820 flow, removed 1635 selfloop flow, removed 53 redundant places. [2023-08-29 23:36:26,620 INFO L231 Difference]: Finished difference. Result has 348 places, 547 transitions, 8909 flow [2023-08-29 23:36:26,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=8909, PETRI_PLACES=348, PETRI_TRANSITIONS=547} [2023-08-29 23:36:26,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2023-08-29 23:36:26,621 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 547 transitions, 8909 flow [2023-08-29 23:36:26,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.125) internal successors, (2403), 24 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:26,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:36:26,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:36:26,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 23:36:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:26,822 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:36:26,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:36:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1616310805, now seen corresponding path program 8 times [2023-08-29 23:36:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:36:26,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685314656] [2023-08-29 23:36:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:36:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:36:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:27,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:36:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685314656] [2023-08-29 23:36:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685314656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:36:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822471794] [2023-08-29 23:36:27,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:36:27,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:36:27,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:36:27,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 23:36:27,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:36:27,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:36:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:36:27,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:28,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:29,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822471794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:29,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:36:29,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-29 23:36:29,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104107825] [2023-08-29 23:36:29,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:29,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:36:29,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:36:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:36:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:36:29,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:36:29,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 547 transitions, 8909 flow. Second operand has 24 states, 24 states have (on average 97.79166666666667) internal successors, (2347), 24 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:29,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:29,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:36:29,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:35,929 INFO L130 PetriNetUnfolder]: 6150/10151 cut-off events. [2023-08-29 23:36:35,929 INFO L131 PetriNetUnfolder]: For 229840/229840 co-relation queries the response was YES. [2023-08-29 23:36:36,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70244 conditions, 10151 events. 6150/10151 cut-off events. For 229840/229840 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 64306 event pairs, 407 based on Foata normal form. 310/10461 useless extension candidates. Maximal degree in co-relation 70161. Up to 3274 conditions per place. [2023-08-29 23:36:36,039 INFO L137 encePairwiseOnDemand]: 231/241 looper letters, 559 selfloop transitions, 292 changer transitions 303/1154 dead transitions. [2023-08-29 23:36:36,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 1154 transitions, 18583 flow [2023-08-29 23:36:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-08-29 23:36:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-08-29 23:36:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9758 transitions. [2023-08-29 23:36:36,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42176694329183956 [2023-08-29 23:36:36,049 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9758 transitions. [2023-08-29 23:36:36,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9758 transitions. [2023-08-29 23:36:36,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:36:36,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9758 transitions. [2023-08-29 23:36:36,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 101.64583333333333) internal successors, (9758), 96 states have internal predecessors, (9758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:36,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 241.0) internal successors, (23377), 97 states have internal predecessors, (23377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:36,084 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 241.0) internal successors, (23377), 97 states have internal predecessors, (23377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:36,085 INFO L175 Difference]: Start difference. First operand has 348 places, 547 transitions, 8909 flow. Second operand 96 states and 9758 transitions. [2023-08-29 23:36:36,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 1154 transitions, 18583 flow [2023-08-29 23:36:36,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1154 transitions, 16892 flow, removed 595 selfloop flow, removed 49 redundant places. [2023-08-29 23:36:36,860 INFO L231 Difference]: Finished difference. Result has 412 places, 585 transitions, 9783 flow [2023-08-29 23:36:36,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=7864, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=9783, PETRI_PLACES=412, PETRI_TRANSITIONS=585} [2023-08-29 23:36:36,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2023-08-29 23:36:36,861 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 585 transitions, 9783 flow [2023-08-29 23:36:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.79166666666667) internal successors, (2347), 24 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:36,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:36:36,862 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:36:36,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 23:36:37,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-29 23:36:37,068 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:36:37,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:36:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash -891136992, now seen corresponding path program 9 times [2023-08-29 23:36:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:36:37,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069078736] [2023-08-29 23:36:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:36:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:36:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:37,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:36:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069078736] [2023-08-29 23:36:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069078736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:36:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16425330] [2023-08-29 23:36:37,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:36:37,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:36:37,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:36:37,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-29 23:36:37,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-29 23:36:37,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:36:37,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 23:36:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:38,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:39,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16425330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:39,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:36:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-29 23:36:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847968361] [2023-08-29 23:36:39,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:39,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:36:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:36:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:36:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:36:39,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:36:39,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 585 transitions, 9783 flow. Second operand has 25 states, 25 states have (on average 98.04) internal successors, (2451), 25 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:39,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:39,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:36:39,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:46,029 INFO L130 PetriNetUnfolder]: 6796/11183 cut-off events. [2023-08-29 23:36:46,029 INFO L131 PetriNetUnfolder]: For 512763/512763 co-relation queries the response was YES. [2023-08-29 23:36:46,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90290 conditions, 11183 events. 6796/11183 cut-off events. For 512763/512763 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 71764 event pairs, 567 based on Foata normal form. 196/11379 useless extension candidates. Maximal degree in co-relation 90181. Up to 4568 conditions per place. [2023-08-29 23:36:46,174 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 597 selfloop transitions, 292 changer transitions 229/1118 dead transitions. [2023-08-29 23:36:46,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1118 transitions, 20576 flow [2023-08-29 23:36:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-29 23:36:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-29 23:36:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 9034 transitions. [2023-08-29 23:36:46,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118513683621617 [2023-08-29 23:36:46,183 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 9034 transitions. [2023-08-29 23:36:46,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 9034 transitions. [2023-08-29 23:36:46,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:36:46,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 9034 transitions. [2023-08-29 23:36:46,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 101.50561797752809) internal successors, (9034), 89 states have internal predecessors, (9034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:46,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 241.0) internal successors, (21690), 90 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:46,222 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 241.0) internal successors, (21690), 90 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:46,222 INFO L175 Difference]: Start difference. First operand has 412 places, 585 transitions, 9783 flow. Second operand 89 states and 9034 transitions. [2023-08-29 23:36:46,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1118 transitions, 20576 flow [2023-08-29 23:36:47,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1118 transitions, 16967 flow, removed 1501 selfloop flow, removed 72 redundant places. [2023-08-29 23:36:47,354 INFO L231 Difference]: Finished difference. Result has 423 places, 668 transitions, 11037 flow [2023-08-29 23:36:47,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=8508, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=11037, PETRI_PLACES=423, PETRI_TRANSITIONS=668} [2023-08-29 23:36:47,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2023-08-29 23:36:47,356 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 668 transitions, 11037 flow [2023-08-29 23:36:47,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.04) internal successors, (2451), 25 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:47,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:36:47,357 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:36:47,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-29 23:36:47,562 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,SelfDestructingSolverStorable24 [2023-08-29 23:36:47,563 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:36:47,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:36:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1952264199, now seen corresponding path program 10 times [2023-08-29 23:36:47,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:36:47,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870286102] [2023-08-29 23:36:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:36:47,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:36:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:36:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:48,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:36:48,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870286102] [2023-08-29 23:36:48,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870286102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:36:48,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803079705] [2023-08-29 23:36:48,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:36:48,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:36:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:36:48,594 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) [2023-08-29 23:36:48,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-29 23:36:48,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:36:48,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:36:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:36:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:36:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:49,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:36:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:36:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803079705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:36:50,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:36:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-29 23:36:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673898099] [2023-08-29 23:36:50,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:36:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-29 23:36:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:36:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-29 23:36:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2023-08-29 23:36:50,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:36:50,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 668 transitions, 11037 flow. Second operand has 27 states, 27 states have (on average 100.25925925925925) internal successors, (2707), 27 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:50,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:36:50,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:36:50,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:36:58,654 INFO L130 PetriNetUnfolder]: 5987/11015 cut-off events. [2023-08-29 23:36:58,654 INFO L131 PetriNetUnfolder]: For 949784/949845 co-relation queries the response was YES. [2023-08-29 23:36:58,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116457 conditions, 11015 events. 5987/11015 cut-off events. For 949784/949845 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 83831 event pairs, 180 based on Foata normal form. 235/11110 useless extension candidates. Maximal degree in co-relation 116347. Up to 2562 conditions per place. [2023-08-29 23:36:58,819 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 581 selfloop transitions, 503 changer transitions 294/1423 dead transitions. [2023-08-29 23:36:58,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1423 transitions, 29624 flow [2023-08-29 23:36:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-29 23:36:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-29 23:36:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 10120 transitions. [2023-08-29 23:36:58,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329041365444668 [2023-08-29 23:36:58,825 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 10120 transitions. [2023-08-29 23:36:58,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 10120 transitions. [2023-08-29 23:36:58,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:36:58,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 10120 transitions. [2023-08-29 23:36:58,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 104.3298969072165) internal successors, (10120), 97 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:58,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 241.0) internal successors, (23618), 98 states have internal predecessors, (23618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:58,853 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 241.0) internal successors, (23618), 98 states have internal predecessors, (23618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:36:58,854 INFO L175 Difference]: Start difference. First operand has 423 places, 668 transitions, 11037 flow. Second operand 97 states and 10120 transitions. [2023-08-29 23:36:58,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1423 transitions, 29624 flow [2023-08-29 23:37:00,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1423 transitions, 24688 flow, removed 2441 selfloop flow, removed 56 redundant places. [2023-08-29 23:37:00,728 INFO L231 Difference]: Finished difference. Result has 446 places, 846 transitions, 15593 flow [2023-08-29 23:37:00,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=10427, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=15593, PETRI_PLACES=446, PETRI_TRANSITIONS=846} [2023-08-29 23:37:00,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2023-08-29 23:37:00,729 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 846 transitions, 15593 flow [2023-08-29 23:37:00,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 100.25925925925925) internal successors, (2707), 27 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:00,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:37:00,730 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:37:00,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-29 23:37:00,930 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,SelfDestructingSolverStorable25 [2023-08-29 23:37:00,930 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:37:00,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:37:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash -785454163, now seen corresponding path program 11 times [2023-08-29 23:37:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:37:00,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453657369] [2023-08-29 23:37:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:37:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:37:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:37:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:01,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:37:01,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453657369] [2023-08-29 23:37:01,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453657369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:37:01,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080182436] [2023-08-29 23:37:01,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:37:01,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:37:01,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:37:01,701 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) [2023-08-29 23:37:01,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-29 23:37:01,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-29 23:37:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:37:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:37:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:37:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:02,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:37:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:04,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080182436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:37:04,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:37:04,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-29 23:37:04,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275389596] [2023-08-29 23:37:04,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:37:04,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-29 23:37:04,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:37:04,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-29 23:37:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2023-08-29 23:37:04,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:37:04,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 846 transitions, 15593 flow. Second operand has 27 states, 27 states have (on average 100.25925925925925) internal successors, (2707), 27 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:04,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:37:04,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:37:04,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:37:11,393 INFO L130 PetriNetUnfolder]: 6489/12057 cut-off events. [2023-08-29 23:37:11,393 INFO L131 PetriNetUnfolder]: For 470956/471037 co-relation queries the response was YES. [2023-08-29 23:37:11,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107437 conditions, 12057 events. 6489/12057 cut-off events. For 470956/471037 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 93300 event pairs, 274 based on Foata normal form. 219/12148 useless extension candidates. Maximal degree in co-relation 107340. Up to 3270 conditions per place. [2023-08-29 23:37:11,542 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 699 selfloop transitions, 424 changer transitions 228/1396 dead transitions. [2023-08-29 23:37:11,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1396 transitions, 27854 flow [2023-08-29 23:37:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-29 23:37:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-29 23:37:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7515 transitions. [2023-08-29 23:37:11,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43309128630705396 [2023-08-29 23:37:11,546 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7515 transitions. [2023-08-29 23:37:11,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7515 transitions. [2023-08-29 23:37:11,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:37:11,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7515 transitions. [2023-08-29 23:37:11,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 104.375) internal successors, (7515), 72 states have internal predecessors, (7515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:11,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 241.0) internal successors, (17593), 73 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:11,563 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 241.0) internal successors, (17593), 73 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:11,563 INFO L175 Difference]: Start difference. First operand has 446 places, 846 transitions, 15593 flow. Second operand 72 states and 7515 transitions. [2023-08-29 23:37:11,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1396 transitions, 27854 flow [2023-08-29 23:37:12,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1396 transitions, 25764 flow, removed 929 selfloop flow, removed 46 redundant places. [2023-08-29 23:37:12,939 INFO L231 Difference]: Finished difference. Result has 461 places, 964 transitions, 17957 flow [2023-08-29 23:37:12,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=14111, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=17957, PETRI_PLACES=461, PETRI_TRANSITIONS=964} [2023-08-29 23:37:12,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2023-08-29 23:37:12,941 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 964 transitions, 17957 flow [2023-08-29 23:37:12,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 100.25925925925925) internal successors, (2707), 27 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:12,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:37:12,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:37:12,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-29 23:37:13,148 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,SelfDestructingSolverStorable26 [2023-08-29 23:37:13,148 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:37:13,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:37:13,149 INFO L85 PathProgramCache]: Analyzing trace with hash 499491438, now seen corresponding path program 12 times [2023-08-29 23:37:13,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:37:13,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489399663] [2023-08-29 23:37:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:37:13,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:37:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:37:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:13,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:37:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489399663] [2023-08-29 23:37:13,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489399663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:37:13,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922596481] [2023-08-29 23:37:13,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:37:13,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:37:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:37:13,903 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) [2023-08-29 23:37:13,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-29 23:37:14,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-29 23:37:14,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:37:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:37:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:37:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:14,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:37:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922596481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:37:16,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:37:16,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-08-29 23:37:16,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389531243] [2023-08-29 23:37:16,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:37:16,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:37:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:37:16,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:37:16,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:37:16,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:37:16,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 964 transitions, 17957 flow. Second operand has 25 states, 25 states have (on average 100.2) internal successors, (2505), 25 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:16,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:37:16,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:37:16,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:37:25,327 INFO L130 PetriNetUnfolder]: 8206/15090 cut-off events. [2023-08-29 23:37:25,328 INFO L131 PetriNetUnfolder]: For 549716/549774 co-relation queries the response was YES. [2023-08-29 23:37:25,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135416 conditions, 15090 events. 8206/15090 cut-off events. For 549716/549774 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 120035 event pairs, 512 based on Foata normal form. 284/15259 useless extension candidates. Maximal degree in co-relation 135323. Up to 3494 conditions per place. [2023-08-29 23:37:25,492 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 789 selfloop transitions, 582 changer transitions 311/1768 dead transitions. [2023-08-29 23:37:25,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1768 transitions, 34493 flow [2023-08-29 23:37:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-29 23:37:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-29 23:37:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 8422 transitions. [2023-08-29 23:37:25,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43682572614107884 [2023-08-29 23:37:25,497 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 8422 transitions. [2023-08-29 23:37:25,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 8422 transitions. [2023-08-29 23:37:25,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:37:25,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 8422 transitions. [2023-08-29 23:37:25,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 105.275) internal successors, (8422), 80 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:25,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 241.0) internal successors, (19521), 81 states have internal predecessors, (19521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:25,518 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 241.0) internal successors, (19521), 81 states have internal predecessors, (19521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:25,518 INFO L175 Difference]: Start difference. First operand has 461 places, 964 transitions, 17957 flow. Second operand 80 states and 8422 transitions. [2023-08-29 23:37:25,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1768 transitions, 34493 flow [2023-08-29 23:37:27,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1768 transitions, 32427 flow, removed 946 selfloop flow, removed 32 redundant places. [2023-08-29 23:37:27,898 INFO L231 Difference]: Finished difference. Result has 506 places, 1184 transitions, 23709 flow [2023-08-29 23:37:27,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=16997, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=23709, PETRI_PLACES=506, PETRI_TRANSITIONS=1184} [2023-08-29 23:37:27,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2023-08-29 23:37:27,899 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1184 transitions, 23709 flow [2023-08-29 23:37:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 100.2) internal successors, (2505), 25 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:27,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:37:27,900 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:37:27,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-29 23:37:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:37:28,105 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:37:28,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:37:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1785397735, now seen corresponding path program 13 times [2023-08-29 23:37:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:37:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367666345] [2023-08-29 23:37:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:37:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:37:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:37:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:37:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367666345] [2023-08-29 23:37:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367666345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:37:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348798266] [2023-08-29 23:37:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:37:28,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:37:28,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:37:28,636 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) [2023-08-29 23:37:28,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-29 23:37:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:37:28,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-29 23:37:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:37:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:29,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:37:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:31,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348798266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:37:31,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:37:31,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-29 23:37:31,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107338139] [2023-08-29 23:37:31,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:37:31,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-29 23:37:31,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:37:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-29 23:37:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2023-08-29 23:37:31,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:37:31,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1184 transitions, 23709 flow. Second operand has 27 states, 27 states have (on average 100.25925925925925) internal successors, (2707), 27 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:31,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:37:31,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:37:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:37:40,352 INFO L130 PetriNetUnfolder]: 8640/16038 cut-off events. [2023-08-29 23:37:40,352 INFO L131 PetriNetUnfolder]: For 700664/700725 co-relation queries the response was YES. [2023-08-29 23:37:40,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148693 conditions, 16038 events. 8640/16038 cut-off events. For 700664/700725 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 129739 event pairs, 704 based on Foata normal form. 169/16085 useless extension candidates. Maximal degree in co-relation 148592. Up to 4583 conditions per place. [2023-08-29 23:37:40,601 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 958 selfloop transitions, 533 changer transitions 196/1773 dead transitions. [2023-08-29 23:37:40,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1773 transitions, 36167 flow [2023-08-29 23:37:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-29 23:37:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-29 23:37:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7578 transitions. [2023-08-29 23:37:40,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367219917012448 [2023-08-29 23:37:40,608 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7578 transitions. [2023-08-29 23:37:40,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7578 transitions. [2023-08-29 23:37:40,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:37:40,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7578 transitions. [2023-08-29 23:37:40,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 105.25) internal successors, (7578), 72 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:40,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 241.0) internal successors, (17593), 73 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:40,628 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 241.0) internal successors, (17593), 73 states have internal predecessors, (17593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:40,628 INFO L175 Difference]: Start difference. First operand has 506 places, 1184 transitions, 23709 flow. Second operand 72 states and 7578 transitions. [2023-08-29 23:37:40,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1773 transitions, 36167 flow [2023-08-29 23:37:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1773 transitions, 34528 flow, removed 767 selfloop flow, removed 27 redundant places. [2023-08-29 23:37:42,875 INFO L231 Difference]: Finished difference. Result has 553 places, 1327 transitions, 27485 flow [2023-08-29 23:37:42,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=22530, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=27485, PETRI_PLACES=553, PETRI_TRANSITIONS=1327} [2023-08-29 23:37:42,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 510 predicate places. [2023-08-29 23:37:42,877 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1327 transitions, 27485 flow [2023-08-29 23:37:42,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 100.25925925925925) internal successors, (2707), 27 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:42,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:37:42,877 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:37:42,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-29 23:37:43,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-29 23:37:43,079 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:37:43,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:37:43,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2086970624, now seen corresponding path program 4 times [2023-08-29 23:37:43,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:37:43,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83627635] [2023-08-29 23:37:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:37:43,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:37:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:37:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:37:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83627635] [2023-08-29 23:37:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83627635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:37:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055540333] [2023-08-29 23:37:44,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:37:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:37:44,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:37:44,441 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) [2023-08-29 23:37:44,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-29 23:37:44,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:37:44,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:37:44,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:37:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:37:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:37:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:37:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055540333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:37:46,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:37:46,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:37:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311874483] [2023-08-29 23:37:46,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:37:46,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:37:46,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:37:46,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:37:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:37:46,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 241 [2023-08-29 23:37:46,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1327 transitions, 27485 flow. Second operand has 30 states, 30 states have (on average 101.7) internal successors, (3051), 30 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:46,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:37:46,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 241 [2023-08-29 23:37:46,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:37:56,895 INFO L130 PetriNetUnfolder]: 9781/18333 cut-off events. [2023-08-29 23:37:56,895 INFO L131 PetriNetUnfolder]: For 991958/992111 co-relation queries the response was YES. [2023-08-29 23:37:57,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177148 conditions, 18333 events. 9781/18333 cut-off events. For 991958/992111 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 152554 event pairs, 790 based on Foata normal form. 293/18506 useless extension candidates. Maximal degree in co-relation 177035. Up to 5546 conditions per place. [2023-08-29 23:37:57,181 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 1108 selfloop transitions, 526 changer transitions 379/2099 dead transitions. [2023-08-29 23:37:57,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 2099 transitions, 43730 flow [2023-08-29 23:37:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-29 23:37:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-29 23:37:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 10385 transitions. [2023-08-29 23:37:57,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44424006502117463 [2023-08-29 23:37:57,187 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 10385 transitions. [2023-08-29 23:37:57,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 10385 transitions. [2023-08-29 23:37:57,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:37:57,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 10385 transitions. [2023-08-29 23:37:57,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 107.0618556701031) internal successors, (10385), 97 states have internal predecessors, (10385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:57,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 241.0) internal successors, (23618), 98 states have internal predecessors, (23618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:57,205 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 241.0) internal successors, (23618), 98 states have internal predecessors, (23618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:57,205 INFO L175 Difference]: Start difference. First operand has 553 places, 1327 transitions, 27485 flow. Second operand 97 states and 10385 transitions. [2023-08-29 23:37:57,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 2099 transitions, 43730 flow [2023-08-29 23:38:00,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 2099 transitions, 42707 flow, removed 468 selfloop flow, removed 32 redundant places. [2023-08-29 23:38:00,848 INFO L231 Difference]: Finished difference. Result has 632 places, 1459 transitions, 31220 flow [2023-08-29 23:38:00,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=26685, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=31220, PETRI_PLACES=632, PETRI_TRANSITIONS=1459} [2023-08-29 23:38:00,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 589 predicate places. [2023-08-29 23:38:00,850 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 1459 transitions, 31220 flow [2023-08-29 23:38:00,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 101.7) internal successors, (3051), 30 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:00,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:00,850 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:38:00,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-29 23:38:01,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:38:01,051 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:38:01,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1395350143, now seen corresponding path program 14 times [2023-08-29 23:38:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:38:01,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521562018] [2023-08-29 23:38:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:38:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:38:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521562018] [2023-08-29 23:38:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521562018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:38:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258995261] [2023-08-29 23:38:01,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:38:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:38:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:38:01,889 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) [2023-08-29 23:38:01,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-29 23:38:02,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:38:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:38:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:38:02,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:38:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:04,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258995261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:38:04,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:38:04,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-29 23:38:04,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446866586] [2023-08-29 23:38:04,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:38:04,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-29 23:38:04,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:38:04,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-29 23:38:04,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2023-08-29 23:38:04,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:38:04,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 1459 transitions, 31220 flow. Second operand has 31 states, 31 states have (on average 97.70967741935483) internal successors, (3029), 31 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:04,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:04,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:38:04,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:18,909 INFO L130 PetriNetUnfolder]: 15066/25285 cut-off events. [2023-08-29 23:38:18,910 INFO L131 PetriNetUnfolder]: For 1223981/1223981 co-relation queries the response was YES. [2023-08-29 23:38:19,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227887 conditions, 25285 events. 15066/25285 cut-off events. For 1223981/1223981 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 188747 event pairs, 1645 based on Foata normal form. 296/25581 useless extension candidates. Maximal degree in co-relation 227757. Up to 9808 conditions per place. [2023-08-29 23:38:19,530 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 1286 selfloop transitions, 648 changer transitions 244/2178 dead transitions. [2023-08-29 23:38:19,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 2178 transitions, 49238 flow [2023-08-29 23:38:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-08-29 23:38:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-08-29 23:38:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 9103 transitions. [2023-08-29 23:38:19,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42440207002657465 [2023-08-29 23:38:19,536 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 9103 transitions. [2023-08-29 23:38:19,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 9103 transitions. [2023-08-29 23:38:19,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:19,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 9103 transitions. [2023-08-29 23:38:19,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 102.28089887640449) internal successors, (9103), 89 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:19,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 241.0) internal successors, (21690), 90 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:19,552 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 241.0) internal successors, (21690), 90 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:19,553 INFO L175 Difference]: Start difference. First operand has 632 places, 1459 transitions, 31220 flow. Second operand 89 states and 9103 transitions. [2023-08-29 23:38:19,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 2178 transitions, 49238 flow [2023-08-29 23:38:24,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 2178 transitions, 45813 flow, removed 1674 selfloop flow, removed 43 redundant places. [2023-08-29 23:38:24,392 INFO L231 Difference]: Finished difference. Result has 675 places, 1613 transitions, 35450 flow [2023-08-29 23:38:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=29829, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=35450, PETRI_PLACES=675, PETRI_TRANSITIONS=1613} [2023-08-29 23:38:24,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 632 predicate places. [2023-08-29 23:38:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1613 transitions, 35450 flow [2023-08-29 23:38:24,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.70967741935483) internal successors, (3029), 31 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:24,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:38:24,395 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:38:24,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-29 23:38:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:38:24,604 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:38:24,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:38:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2122732753, now seen corresponding path program 15 times [2023-08-29 23:38:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:38:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804350588] [2023-08-29 23:38:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:38:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:38:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:38:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:25,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:38:25,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804350588] [2023-08-29 23:38:25,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804350588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:38:25,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100753529] [2023-08-29 23:38:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:38:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:38:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:38:25,314 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) [2023-08-29 23:38:25,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-29 23:38:25,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-29 23:38:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:38:25,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:38:25,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:38:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:26,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:38:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:38:28,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100753529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:38:28,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:38:28,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:38:28,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020281323] [2023-08-29 23:38:28,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:38:28,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:38:28,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:38:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:38:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:38:28,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:38:28,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1613 transitions, 35450 flow. Second operand has 30 states, 30 states have (on average 97.53333333333333) internal successors, (2926), 30 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:28,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:38:28,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:38:28,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:38:53,774 INFO L130 PetriNetUnfolder]: 17195/28806 cut-off events. [2023-08-29 23:38:53,774 INFO L131 PetriNetUnfolder]: For 1992663/1992663 co-relation queries the response was YES. [2023-08-29 23:38:54,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286749 conditions, 28806 events. 17195/28806 cut-off events. For 1992663/1992663 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 219130 event pairs, 1389 based on Foata normal form. 648/29454 useless extension candidates. Maximal degree in co-relation 286609. Up to 9756 conditions per place. [2023-08-29 23:38:54,294 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 1361 selfloop transitions, 744 changer transitions 628/2733 dead transitions. [2023-08-29 23:38:54,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 2733 transitions, 64211 flow [2023-08-29 23:38:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2023-08-29 23:38:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2023-08-29 23:38:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 16706 transitions. [2023-08-29 23:38:54,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42011819439205333 [2023-08-29 23:38:54,303 INFO L72 ComplementDD]: Start complementDD. Operand 165 states and 16706 transitions. [2023-08-29 23:38:54,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 165 states and 16706 transitions. [2023-08-29 23:38:54,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:38:54,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 165 states and 16706 transitions. [2023-08-29 23:38:54,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 166 states, 165 states have (on average 101.24848484848485) internal successors, (16706), 165 states have internal predecessors, (16706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:54,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 166 states, 166 states have (on average 241.0) internal successors, (40006), 166 states have internal predecessors, (40006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:54,341 INFO L81 ComplementDD]: Finished complementDD. Result has 166 states, 166 states have (on average 241.0) internal successors, (40006), 166 states have internal predecessors, (40006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:38:54,342 INFO L175 Difference]: Start difference. First operand has 675 places, 1613 transitions, 35450 flow. Second operand 165 states and 16706 transitions. [2023-08-29 23:38:54,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 2733 transitions, 64211 flow [2023-08-29 23:39:01,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 2733 transitions, 60441 flow, removed 1745 selfloop flow, removed 54 redundant places. [2023-08-29 23:39:01,043 INFO L231 Difference]: Finished difference. Result has 858 places, 1747 transitions, 40221 flow [2023-08-29 23:39:01,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=33514, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=566, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=165, PETRI_FLOW=40221, PETRI_PLACES=858, PETRI_TRANSITIONS=1747} [2023-08-29 23:39:01,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 815 predicate places. [2023-08-29 23:39:01,046 INFO L495 AbstractCegarLoop]: Abstraction has has 858 places, 1747 transitions, 40221 flow [2023-08-29 23:39:01,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.53333333333333) internal successors, (2926), 30 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:01,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:01,047 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:39:01,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-29 23:39:01,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:39:01,253 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:39:01,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:01,253 INFO L85 PathProgramCache]: Analyzing trace with hash 420308987, now seen corresponding path program 16 times [2023-08-29 23:39:01,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:39:01,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546466738] [2023-08-29 23:39:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:01,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:39:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:39:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546466738] [2023-08-29 23:39:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546466738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:39:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544883234] [2023-08-29 23:39:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:39:02,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:39:02,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:39:02,052 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) [2023-08-29 23:39:02,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-29 23:39:02,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:39:02,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:39:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:39:02,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:39:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:04,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544883234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:39:04,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:39:04,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-29 23:39:04,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175365506] [2023-08-29 23:39:04,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:39:04,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-29 23:39:04,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:39:04,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-29 23:39:04,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2023-08-29 23:39:04,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:39:04,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 858 places, 1747 transitions, 40221 flow. Second operand has 31 states, 31 states have (on average 100.45161290322581) internal successors, (3114), 31 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:04,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:04,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:39:04,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:39:21,914 INFO L130 PetriNetUnfolder]: 12138/22516 cut-off events. [2023-08-29 23:39:21,915 INFO L131 PetriNetUnfolder]: For 5885453/5885584 co-relation queries the response was YES. [2023-08-29 23:39:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351012 conditions, 22516 events. 12138/22516 cut-off events. For 5885453/5885584 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 191028 event pairs, 568 based on Foata normal form. 326/22552 useless extension candidates. Maximal degree in co-relation 350798. Up to 6018 conditions per place. [2023-08-29 23:39:22,449 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 1189 selfloop transitions, 773 changer transitions 309/2384 dead transitions. [2023-08-29 23:39:22,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 837 places, 2384 transitions, 62408 flow [2023-08-29 23:39:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-29 23:39:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-29 23:39:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 9174 transitions. [2023-08-29 23:39:22,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43257261410788383 [2023-08-29 23:39:22,458 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 9174 transitions. [2023-08-29 23:39:22,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 9174 transitions. [2023-08-29 23:39:22,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:39:22,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 9174 transitions. [2023-08-29 23:39:22,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 104.25) internal successors, (9174), 88 states have internal predecessors, (9174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:22,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 241.0) internal successors, (21449), 89 states have internal predecessors, (21449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:22,474 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 241.0) internal successors, (21449), 89 states have internal predecessors, (21449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:22,474 INFO L175 Difference]: Start difference. First operand has 858 places, 1747 transitions, 40221 flow. Second operand 88 states and 9174 transitions. [2023-08-29 23:39:22,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 837 places, 2384 transitions, 62408 flow [2023-08-29 23:39:45,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 2384 transitions, 56445 flow, removed 2858 selfloop flow, removed 100 redundant places. [2023-08-29 23:39:45,256 INFO L231 Difference]: Finished difference. Result has 774 places, 1841 transitions, 43587 flow [2023-08-29 23:39:45,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=38128, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=43587, PETRI_PLACES=774, PETRI_TRANSITIONS=1841} [2023-08-29 23:39:45,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 731 predicate places. [2023-08-29 23:39:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 774 places, 1841 transitions, 43587 flow [2023-08-29 23:39:45,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 100.45161290322581) internal successors, (3114), 31 states have internal predecessors, (3114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:45,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:39:45,259 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:39:45,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-29 23:39:45,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:39:45,459 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:39:45,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:39:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 878627292, now seen corresponding path program 17 times [2023-08-29 23:39:45,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:39:45,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233532835] [2023-08-29 23:39:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:39:45,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:39:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:39:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:39:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233532835] [2023-08-29 23:39:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233532835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:39:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488304613] [2023-08-29 23:39:46,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:39:46,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:39:46,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:39:46,225 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:39:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-29 23:39:46,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-29 23:39:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:39:46,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:39:46,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:39:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:46,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:39:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:39:49,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488304613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:39:49,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:39:49,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:39:49,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976270656] [2023-08-29 23:39:49,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:39:49,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:39:49,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:39:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:39:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:39:49,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:39:49,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 774 places, 1841 transitions, 43587 flow. Second operand has 30 states, 30 states have (on average 100.1) internal successors, (3003), 30 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:39:49,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:39:49,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:39:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:10,532 INFO L130 PetriNetUnfolder]: 14163/26307 cut-off events. [2023-08-29 23:40:10,532 INFO L131 PetriNetUnfolder]: For 2623241/2623502 co-relation queries the response was YES. [2023-08-29 23:40:11,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324247 conditions, 26307 events. 14163/26307 cut-off events. For 2623241/2623502 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 228911 event pairs, 802 based on Foata normal form. 549/26642 useless extension candidates. Maximal degree in co-relation 324078. Up to 6659 conditions per place. [2023-08-29 23:40:11,282 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 1382 selfloop transitions, 875 changer transitions 581/2963 dead transitions. [2023-08-29 23:40:11,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 2963 transitions, 75979 flow [2023-08-29 23:40:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-08-29 23:40:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2023-08-29 23:40:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 13252 transitions. [2023-08-29 23:40:11,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364091418033327 [2023-08-29 23:40:11,288 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 13252 transitions. [2023-08-29 23:40:11,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 13252 transitions. [2023-08-29 23:40:11,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:11,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 13252 transitions. [2023-08-29 23:40:11,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 105.17460317460318) internal successors, (13252), 126 states have internal predecessors, (13252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:11,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 241.0) internal successors, (30607), 127 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:11,314 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 241.0) internal successors, (30607), 127 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:11,314 INFO L175 Difference]: Start difference. First operand has 774 places, 1841 transitions, 43587 flow. Second operand 126 states and 13252 transitions. [2023-08-29 23:40:11,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 2963 transitions, 75979 flow [2023-08-29 23:40:20,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 2963 transitions, 71926 flow, removed 1977 selfloop flow, removed 51 redundant places. [2023-08-29 23:40:20,302 INFO L231 Difference]: Finished difference. Result has 850 places, 1999 transitions, 50251 flow [2023-08-29 23:40:20,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=42598, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=50251, PETRI_PLACES=850, PETRI_TRANSITIONS=1999} [2023-08-29 23:40:20,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 807 predicate places. [2023-08-29 23:40:20,304 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 1999 transitions, 50251 flow [2023-08-29 23:40:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.1) internal successors, (3003), 30 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:20,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:40:20,305 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:40:20,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-29 23:40:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-29 23:40:20,516 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:40:20,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:40:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1222393217, now seen corresponding path program 18 times [2023-08-29 23:40:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:40:20,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508862386] [2023-08-29 23:40:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:40:20,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:40:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:40:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:40:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508862386] [2023-08-29 23:40:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508862386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:40:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742241640] [2023-08-29 23:40:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:40:21,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:40:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:40:21,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:40:21,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-29 23:40:21,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-08-29 23:40:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:40:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:40:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:40:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:22,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:40:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:40:23,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742241640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:40:23,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:40:23,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-29 23:40:23,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279209430] [2023-08-29 23:40:23,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:40:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-29 23:40:23,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:40:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-29 23:40:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2023-08-29 23:40:23,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:40:23,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 1999 transitions, 50251 flow. Second operand has 31 states, 31 states have (on average 97.70967741935483) internal successors, (3029), 31 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:23,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:40:23,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:40:23,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:40:48,782 INFO L130 PetriNetUnfolder]: 20195/33570 cut-off events. [2023-08-29 23:40:48,782 INFO L131 PetriNetUnfolder]: For 2781190/2781190 co-relation queries the response was YES. [2023-08-29 23:40:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350406 conditions, 33570 events. 20195/33570 cut-off events. For 2781190/2781190 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 257527 event pairs, 2065 based on Foata normal form. 506/34076 useless extension candidates. Maximal degree in co-relation 350219. Up to 14762 conditions per place. [2023-08-29 23:40:49,932 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 1628 selfloop transitions, 679 changer transitions 447/2754 dead transitions. [2023-08-29 23:40:49,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 2754 transitions, 71835 flow [2023-08-29 23:40:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-08-29 23:40:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-08-29 23:40:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 11852 transitions. [2023-08-29 23:40:49,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42032840373089336 [2023-08-29 23:40:49,938 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 11852 transitions. [2023-08-29 23:40:49,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 11852 transitions. [2023-08-29 23:40:49,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:40:49,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 11852 transitions. [2023-08-29 23:40:49,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 101.2991452991453) internal successors, (11852), 117 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:49,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 241.0) internal successors, (28438), 118 states have internal predecessors, (28438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:49,959 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 241.0) internal successors, (28438), 118 states have internal predecessors, (28438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:40:49,959 INFO L175 Difference]: Start difference. First operand has 850 places, 1999 transitions, 50251 flow. Second operand 117 states and 11852 transitions. [2023-08-29 23:40:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 2754 transitions, 71835 flow [2023-08-29 23:41:04,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 857 places, 2754 transitions, 66303 flow, removed 1848 selfloop flow, removed 60 redundant places. [2023-08-29 23:41:04,545 INFO L231 Difference]: Finished difference. Result has 925 places, 2033 transitions, 49514 flow [2023-08-29 23:41:04,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=45832, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=49514, PETRI_PLACES=925, PETRI_TRANSITIONS=2033} [2023-08-29 23:41:04,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 882 predicate places. [2023-08-29 23:41:04,548 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 2033 transitions, 49514 flow [2023-08-29 23:41:04,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.70967741935483) internal successors, (3029), 31 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:04,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:04,549 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:04,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:04,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-29 23:41:04,755 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:41:04,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -335942442, now seen corresponding path program 19 times [2023-08-29 23:41:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:41:04,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584852461] [2023-08-29 23:41:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:41:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:05,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:41:05,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584852461] [2023-08-29 23:41:05,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584852461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:41:05,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638964072] [2023-08-29 23:41:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:41:05,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:41:05,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:41:05,284 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:41:05,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-29 23:41:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:41:05,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:41:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:41:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:05,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:41:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:41:08,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638964072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:41:08,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:41:08,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:41:08,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811172966] [2023-08-29 23:41:08,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:41:08,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:41:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:41:08,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:41:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:41:08,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:41:08,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 2033 transitions, 49514 flow. Second operand has 30 states, 30 states have (on average 99.96666666666667) internal successors, (2999), 30 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:08,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:41:08,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:41:08,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:41:32,306 INFO L130 PetriNetUnfolder]: 14745/27185 cut-off events. [2023-08-29 23:41:32,306 INFO L131 PetriNetUnfolder]: For 6123979/6124120 co-relation queries the response was YES. [2023-08-29 23:41:32,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408533 conditions, 27185 events. 14745/27185 cut-off events. For 6123979/6124120 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 236627 event pairs, 868 based on Foata normal form. 437/27296 useless extension candidates. Maximal degree in co-relation 408312. Up to 8182 conditions per place. [2023-08-29 23:41:33,242 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 1535 selfloop transitions, 772 changer transitions 464/2910 dead transitions. [2023-08-29 23:41:33,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 2910 transitions, 82555 flow [2023-08-29 23:41:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-08-29 23:41:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2023-08-29 23:41:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 11773 transitions. [2023-08-29 23:41:33,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323063929791062 [2023-08-29 23:41:33,249 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 11773 transitions. [2023-08-29 23:41:33,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 11773 transitions. [2023-08-29 23:41:33,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:41:33,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 11773 transitions. [2023-08-29 23:41:33,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 104.1858407079646) internal successors, (11773), 113 states have internal predecessors, (11773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:33,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 241.0) internal successors, (27474), 114 states have internal predecessors, (27474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:33,269 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 241.0) internal successors, (27474), 114 states have internal predecessors, (27474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:33,269 INFO L175 Difference]: Start difference. First operand has 925 places, 2033 transitions, 49514 flow. Second operand 113 states and 11773 transitions. [2023-08-29 23:41:33,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 966 places, 2910 transitions, 82555 flow [2023-08-29 23:41:58,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 2910 transitions, 76283 flow, removed 3045 selfloop flow, removed 85 redundant places. [2023-08-29 23:41:59,034 INFO L231 Difference]: Finished difference. Result has 929 places, 2167 transitions, 55237 flow [2023-08-29 23:41:59,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=48042, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=55237, PETRI_PLACES=929, PETRI_TRANSITIONS=2167} [2023-08-29 23:41:59,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 886 predicate places. [2023-08-29 23:41:59,036 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 2167 transitions, 55237 flow [2023-08-29 23:41:59,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 99.96666666666667) internal successors, (2999), 30 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:41:59,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:41:59,036 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:41:59,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-29 23:41:59,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:41:59,237 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:41:59,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:41:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1956957301, now seen corresponding path program 20 times [2023-08-29 23:41:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:41:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447830384] [2023-08-29 23:41:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:41:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:41:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:42:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:42:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447830384] [2023-08-29 23:42:00,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447830384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:42:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982685894] [2023-08-29 23:42:00,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:42:00,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:42:00,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:42:00,092 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:42:00,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-29 23:42:00,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:42:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:42:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:42:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:42:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:01,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:42:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:42:03,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982685894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:42:03,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:42:03,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:42:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892873228] [2023-08-29 23:42:03,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:42:03,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:42:03,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:42:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:42:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:42:03,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:42:03,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 929 places, 2167 transitions, 55237 flow. Second operand has 30 states, 30 states have (on average 97.53333333333333) internal successors, (2926), 30 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:03,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:42:03,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:42:03,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:42:36,850 INFO L130 PetriNetUnfolder]: 23126/38311 cut-off events. [2023-08-29 23:42:36,850 INFO L131 PetriNetUnfolder]: For 3430093/3430093 co-relation queries the response was YES. [2023-08-29 23:42:38,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412769 conditions, 38311 events. 23126/38311 cut-off events. For 3430093/3430093 co-relation queries the response was YES. Maximal size of possible extension queue 1355. Compared 300338 event pairs, 3287 based on Foata normal form. 440/38751 useless extension candidates. Maximal degree in co-relation 412563. Up to 18706 conditions per place. [2023-08-29 23:42:38,924 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 1865 selfloop transitions, 709 changer transitions 454/3028 dead transitions. [2023-08-29 23:42:38,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1003 places, 3028 transitions, 83226 flow [2023-08-29 23:42:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-08-29 23:42:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2023-08-29 23:42:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 12765 transitions. [2023-08-29 23:42:38,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4203714680893104 [2023-08-29 23:42:38,930 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 12765 transitions. [2023-08-29 23:42:38,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 12765 transitions. [2023-08-29 23:42:38,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:42:38,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 12765 transitions. [2023-08-29 23:42:38,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 101.30952380952381) internal successors, (12765), 126 states have internal predecessors, (12765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:38,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 241.0) internal successors, (30607), 127 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:38,954 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 241.0) internal successors, (30607), 127 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:42:38,954 INFO L175 Difference]: Start difference. First operand has 929 places, 2167 transitions, 55237 flow. Second operand 126 states and 12765 transitions. [2023-08-29 23:42:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1003 places, 3028 transitions, 83226 flow [2023-08-29 23:43:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 945 places, 3028 transitions, 79404 flow, removed 1838 selfloop flow, removed 58 redundant places. [2023-08-29 23:43:05,328 INFO L231 Difference]: Finished difference. Result has 1031 places, 2294 transitions, 60146 flow [2023-08-29 23:43:05,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=53055, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=576, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=60146, PETRI_PLACES=1031, PETRI_TRANSITIONS=2294} [2023-08-29 23:43:05,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 988 predicate places. [2023-08-29 23:43:05,330 INFO L495 AbstractCegarLoop]: Abstraction has has 1031 places, 2294 transitions, 60146 flow [2023-08-29 23:43:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.53333333333333) internal successors, (2926), 30 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:05,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:43:05,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:43:05,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-29 23:43:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:43:05,531 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:43:05,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:43:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2106651456, now seen corresponding path program 21 times [2023-08-29 23:43:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:43:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976689984] [2023-08-29 23:43:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:43:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:43:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:43:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:06,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:43:06,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976689984] [2023-08-29 23:43:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976689984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:43:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769356091] [2023-08-29 23:43:06,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:43:06,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:43:06,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:43:06,246 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:43:06,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-29 23:43:06,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-29 23:43:06,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:43:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:43:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:43:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:07,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:43:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:43:09,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769356091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:43:09,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:43:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:43:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045099320] [2023-08-29 23:43:09,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:43:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:43:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:43:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:43:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:43:09,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:43:09,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1031 places, 2294 transitions, 60146 flow. Second operand has 30 states, 30 states have (on average 99.96666666666667) internal successors, (2999), 30 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:09,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:43:09,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:43:09,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:43:37,918 INFO L130 PetriNetUnfolder]: 16912/31148 cut-off events. [2023-08-29 23:43:37,918 INFO L131 PetriNetUnfolder]: For 8225439/8225584 co-relation queries the response was YES. [2023-08-29 23:43:39,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508640 conditions, 31148 events. 16912/31148 cut-off events. For 8225439/8225584 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 277403 event pairs, 928 based on Foata normal form. 446/31218 useless extension candidates. Maximal degree in co-relation 508392. Up to 9805 conditions per place. [2023-08-29 23:43:39,393 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 1707 selfloop transitions, 927 changer transitions 453/3222 dead transitions. [2023-08-29 23:43:39,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1058 places, 3222 transitions, 99295 flow [2023-08-29 23:43:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-08-29 23:43:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-08-29 23:43:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 10631 transitions. [2023-08-29 23:43:39,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432470913676674 [2023-08-29 23:43:39,515 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 10631 transitions. [2023-08-29 23:43:39,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 10631 transitions. [2023-08-29 23:43:39,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:43:39,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 10631 transitions. [2023-08-29 23:43:39,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 104.22549019607843) internal successors, (10631), 102 states have internal predecessors, (10631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:39,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 241.0) internal successors, (24823), 103 states have internal predecessors, (24823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:39,534 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 241.0) internal successors, (24823), 103 states have internal predecessors, (24823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:43:39,534 INFO L175 Difference]: Start difference. First operand has 1031 places, 2294 transitions, 60146 flow. Second operand 102 states and 10631 transitions. [2023-08-29 23:43:39,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1058 places, 3222 transitions, 99295 flow [2023-08-29 23:44:11,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 978 places, 3222 transitions, 92449 flow, removed 3378 selfloop flow, removed 80 redundant places. [2023-08-29 23:44:11,784 INFO L231 Difference]: Finished difference. Result has 1024 places, 2513 transitions, 69629 flow [2023-08-29 23:44:11,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=58374, PETRI_DIFFERENCE_MINUEND_PLACES=877, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=702, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=69629, PETRI_PLACES=1024, PETRI_TRANSITIONS=2513} [2023-08-29 23:44:11,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 981 predicate places. [2023-08-29 23:44:11,787 INFO L495 AbstractCegarLoop]: Abstraction has has 1024 places, 2513 transitions, 69629 flow [2023-08-29 23:44:11,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 99.96666666666667) internal successors, (2999), 30 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:11,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:44:11,787 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:44:11,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-29 23:44:11,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-29 23:44:11,988 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:44:11,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:44:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1202561805, now seen corresponding path program 22 times [2023-08-29 23:44:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:44:11,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509721116] [2023-08-29 23:44:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:44:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:44:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:44:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:44:12,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:44:12,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509721116] [2023-08-29 23:44:12,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509721116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:44:12,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193269135] [2023-08-29 23:44:12,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:44:12,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:44:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:44:12,533 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:44:12,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-29 23:44:12,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:44:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:44:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:44:12,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:44:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:44:13,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:44:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:44:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193269135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:44:15,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:44:15,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:44:15,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532383777] [2023-08-29 23:44:15,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:44:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:44:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:44:15,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:44:15,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:44:15,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:44:15,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 2513 transitions, 69629 flow. Second operand has 30 states, 30 states have (on average 100.06666666666666) internal successors, (3002), 30 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:15,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:44:15,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:44:15,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:44:45,463 INFO L130 PetriNetUnfolder]: 17990/33078 cut-off events. [2023-08-29 23:44:45,463 INFO L131 PetriNetUnfolder]: For 5059024/5059161 co-relation queries the response was YES. [2023-08-29 23:44:47,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467357 conditions, 33078 events. 17990/33078 cut-off events. For 5059024/5059161 co-relation queries the response was YES. Maximal size of possible extension queue 1409. Compared 296590 event pairs, 984 based on Foata normal form. 429/33111 useless extension candidates. Maximal degree in co-relation 467124. Up to 10841 conditions per place. [2023-08-29 23:44:47,205 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 1894 selfloop transitions, 949 changer transitions 427/3403 dead transitions. [2023-08-29 23:44:47,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1078 places, 3403 transitions, 104166 flow [2023-08-29 23:44:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-08-29 23:44:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-08-29 23:44:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 10528 transitions. [2023-08-29 23:44:47,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43252126042479766 [2023-08-29 23:44:47,211 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 10528 transitions. [2023-08-29 23:44:47,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 10528 transitions. [2023-08-29 23:44:47,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:44:47,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 10528 transitions. [2023-08-29 23:44:47,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 104.23762376237623) internal successors, (10528), 101 states have internal predecessors, (10528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:47,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 241.0) internal successors, (24582), 102 states have internal predecessors, (24582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:47,230 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 241.0) internal successors, (24582), 102 states have internal predecessors, (24582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:44:47,230 INFO L175 Difference]: Start difference. First operand has 1024 places, 2513 transitions, 69629 flow. Second operand 101 states and 10528 transitions. [2023-08-29 23:44:47,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1078 places, 3403 transitions, 104166 flow [2023-08-29 23:45:12,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 3403 transitions, 99588 flow, removed 2225 selfloop flow, removed 50 redundant places. [2023-08-29 23:45:12,822 INFO L231 Difference]: Finished difference. Result has 1063 places, 2701 transitions, 78021 flow [2023-08-29 23:45:12,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=67356, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=737, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=78021, PETRI_PLACES=1063, PETRI_TRANSITIONS=2701} [2023-08-29 23:45:12,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1020 predicate places. [2023-08-29 23:45:12,825 INFO L495 AbstractCegarLoop]: Abstraction has has 1063 places, 2701 transitions, 78021 flow [2023-08-29 23:45:12,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.06666666666666) internal successors, (3002), 30 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:12,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:45:12,826 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:45:12,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-29 23:45:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-29 23:45:13,026 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:45:13,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:45:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash -585625454, now seen corresponding path program 23 times [2023-08-29 23:45:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:45:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975639741] [2023-08-29 23:45:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:45:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:45:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:45:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:13,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:45:13,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975639741] [2023-08-29 23:45:13,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975639741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:45:13,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758044807] [2023-08-29 23:45:13,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:45:13,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:45:13,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:45:13,620 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:45:13,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-29 23:45:13,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-29 23:45:13,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:45:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:45:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:45:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:14,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:45:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:45:15,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758044807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:45:15,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:45:15,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:45:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575540572] [2023-08-29 23:45:15,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:45:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:45:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:45:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:45:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:45:16,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:45:16,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1063 places, 2701 transitions, 78021 flow. Second operand has 30 states, 30 states have (on average 100.26666666666667) internal successors, (3008), 30 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:16,028 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:45:16,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:45:16,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:45:46,794 INFO L130 PetriNetUnfolder]: 18655/34485 cut-off events. [2023-08-29 23:45:46,794 INFO L131 PetriNetUnfolder]: For 4514052/4514257 co-relation queries the response was YES. [2023-08-29 23:45:48,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478544 conditions, 34485 events. 18655/34485 cut-off events. For 4514052/4514257 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 312544 event pairs, 1640 based on Foata normal form. 299/34514 useless extension candidates. Maximal degree in co-relation 478312. Up to 12530 conditions per place. [2023-08-29 23:45:48,630 INFO L137 encePairwiseOnDemand]: 234/241 looper letters, 2017 selfloop transitions, 828 changer transitions 409/3465 dead transitions. [2023-08-29 23:45:48,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 3465 transitions, 106491 flow [2023-08-29 23:45:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-08-29 23:45:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-08-29 23:45:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 9565 transitions. [2023-08-29 23:45:48,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43614062286261457 [2023-08-29 23:45:48,635 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 9565 transitions. [2023-08-29 23:45:48,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 9565 transitions. [2023-08-29 23:45:48,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:45:48,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 9565 transitions. [2023-08-29 23:45:48,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 105.10989010989012) internal successors, (9565), 91 states have internal predecessors, (9565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:48,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 241.0) internal successors, (22172), 92 states have internal predecessors, (22172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:48,651 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 241.0) internal successors, (22172), 92 states have internal predecessors, (22172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:45:48,651 INFO L175 Difference]: Start difference. First operand has 1063 places, 2701 transitions, 78021 flow. Second operand 91 states and 9565 transitions. [2023-08-29 23:45:48,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 3465 transitions, 106491 flow [2023-08-29 23:46:11,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1062 places, 3465 transitions, 101919 flow, removed 2203 selfloop flow, removed 48 redundant places. [2023-08-29 23:46:11,593 INFO L231 Difference]: Finished difference. Result has 1098 places, 2808 transitions, 82459 flow [2023-08-29 23:46:11,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=75627, PETRI_DIFFERENCE_MINUEND_PLACES=972, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=696, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=82459, PETRI_PLACES=1098, PETRI_TRANSITIONS=2808} [2023-08-29 23:46:11,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1055 predicate places. [2023-08-29 23:46:11,596 INFO L495 AbstractCegarLoop]: Abstraction has has 1098 places, 2808 transitions, 82459 flow [2023-08-29 23:46:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.26666666666667) internal successors, (3008), 30 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:11,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:46:11,597 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:46:11,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-29 23:46:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-29 23:46:11,803 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:46:11,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:46:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2130179064, now seen corresponding path program 24 times [2023-08-29 23:46:11,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:46:11,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052710376] [2023-08-29 23:46:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:46:11,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:46:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:46:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:46:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052710376] [2023-08-29 23:46:12,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052710376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:46:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152109358] [2023-08-29 23:46:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:46:12,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:46:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:46:12,523 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:46:12,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-29 23:46:12,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-08-29 23:46:12,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:46:12,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:46:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:46:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:13,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:46:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:46:15,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152109358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:46:15,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:46:15,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-29 23:46:15,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461177172] [2023-08-29 23:46:15,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:46:15,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-29 23:46:15,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:46:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-29 23:46:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2023-08-29 23:46:15,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 241 [2023-08-29 23:46:15,734 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1098 places, 2808 transitions, 82459 flow. Second operand has 31 states, 31 states have (on average 97.83870967741936) internal successors, (3033), 31 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:46:15,734 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:46:15,734 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 241 [2023-08-29 23:46:15,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:46:59,951 INFO L130 PetriNetUnfolder]: 28578/47291 cut-off events. [2023-08-29 23:46:59,951 INFO L131 PetriNetUnfolder]: For 4521163/4521163 co-relation queries the response was YES. [2023-08-29 23:47:02,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543937 conditions, 47291 events. 28578/47291 cut-off events. For 4521163/4521163 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 381962 event pairs, 4181 based on Foata normal form. 460/47751 useless extension candidates. Maximal degree in co-relation 543697. Up to 24668 conditions per place. [2023-08-29 23:47:02,972 INFO L137 encePairwiseOnDemand]: 232/241 looper letters, 2336 selfloop transitions, 888 changer transitions 414/3638 dead transitions. [2023-08-29 23:47:02,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1187 places, 3638 transitions, 108721 flow [2023-08-29 23:47:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-08-29 23:47:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-08-29 23:47:02,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 13405 transitions. [2023-08-29 23:47:02,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213818684773042 [2023-08-29 23:47:02,979 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 13405 transitions. [2023-08-29 23:47:02,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 13405 transitions. [2023-08-29 23:47:02,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:47:02,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 13405 transitions. [2023-08-29 23:47:02,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 101.5530303030303) internal successors, (13405), 132 states have internal predecessors, (13405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 241.0) internal successors, (32053), 133 states have internal predecessors, (32053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,004 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 241.0) internal successors, (32053), 133 states have internal predecessors, (32053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:03,004 INFO L175 Difference]: Start difference. First operand has 1098 places, 2808 transitions, 82459 flow. Second operand 132 states and 13405 transitions. [2023-08-29 23:47:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1187 places, 3638 transitions, 108721 flow [2023-08-29 23:47:30,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1146 places, 3638 transitions, 104746 flow, removed 1358 selfloop flow, removed 41 redundant places. [2023-08-29 23:47:30,727 INFO L231 Difference]: Finished difference. Result has 1217 places, 2865 transitions, 84314 flow [2023-08-29 23:47:30,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=79385, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=780, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2017, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=84314, PETRI_PLACES=1217, PETRI_TRANSITIONS=2865} [2023-08-29 23:47:30,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1174 predicate places. [2023-08-29 23:47:30,730 INFO L495 AbstractCegarLoop]: Abstraction has has 1217 places, 2865 transitions, 84314 flow [2023-08-29 23:47:30,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.83870967741936) internal successors, (3033), 31 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:30,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:47:30,731 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:47:30,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-29 23:47:30,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:47:30,931 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:47:30,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:47:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1419885518, now seen corresponding path program 25 times [2023-08-29 23:47:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:47:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789605351] [2023-08-29 23:47:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:47:30,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:47:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:31,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:47:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789605351] [2023-08-29 23:47:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789605351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:47:31,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549569818] [2023-08-29 23:47:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:47:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:47:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:47:31,537 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:47:31,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-29 23:47:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:47:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-29 23:47:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:47:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:32,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:47:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:47:34,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549569818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:47:34,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:47:34,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-29 23:47:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969379270] [2023-08-29 23:47:34,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:47:34,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-29 23:47:34,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:47:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-29 23:47:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-08-29 23:47:34,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 241 [2023-08-29 23:47:34,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1217 places, 2865 transitions, 84314 flow. Second operand has 30 states, 30 states have (on average 100.06666666666666) internal successors, (3002), 30 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:47:34,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:47:34,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 241 [2023-08-29 23:47:34,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15