./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 03:41:37,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 03:41:37,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 03:41:37,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 03:41:37,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 03:41:37,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 03:41:37,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 03:41:37,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 03:41:37,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 03:41:37,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 03:41:37,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 03:41:37,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 03:41:37,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 03:41:37,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 03:41:37,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 03:41:37,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 03:41:37,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 03:41:37,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 03:41:37,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 03:41:37,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 03:41:37,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 03:41:37,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 03:41:37,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 03:41:37,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 03:41:37,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 03:41:37,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 03:41:37,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 03:41:37,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 03:41:37,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 03:41:37,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 03:41:37,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 03:41:37,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 03:41:37,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 03:41:37,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 03:41:37,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 03:41:37,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 03:41:37,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 03:41:37,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 03:41:37,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 03:41:37,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 03:41:37,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 03:41:37,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 03:41:38,012 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 03:41:38,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 03:41:38,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 03:41:38,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 03:41:38,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 03:41:38,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 03:41:38,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 03:41:38,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 03:41:38,016 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 03:41:38,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 03:41:38,017 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 03:41:38,017 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 03:41:38,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 03:41:38,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 03:41:38,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 03:41:38,018 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 03:41:38,018 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 03:41:38,018 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 03:41:38,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 03:41:38,019 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 03:41:38,019 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 03:41:38,019 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 03:41:38,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 03:41:38,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 03:41:38,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 03:41:38,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:41:38,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 03:41:38,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 03:41:38,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 03:41:38,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 03:41:38,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 03:41:38,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 03:41:38,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 03:41:38,021 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 03:41:38,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 03:41:38,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 03:41:38,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 03:41:38,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 03:41:38,363 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 03:41:38,363 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 03:41:38,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-09-01 03:41:39,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 03:41:39,693 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 03:41:39,693 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-09-01 03:41:39,703 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edf115e5b/96e5c9c195db4fdfb41a8bd531832bb4/FLAG6a892d83c [2023-09-01 03:41:39,725 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edf115e5b/96e5c9c195db4fdfb41a8bd531832bb4 [2023-09-01 03:41:39,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 03:41:39,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 03:41:39,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 03:41:39,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 03:41:39,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 03:41:39,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:39,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd51719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39, skipping insertion in model container [2023-09-01 03:41:39,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:39,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 03:41:39,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 03:41:39,914 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-09-01 03:41:39,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:41:39,929 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 03:41:39,955 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-09-01 03:41:39,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 03:41:39,970 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:41:39,971 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 03:41:39,976 INFO L208 MainTranslator]: Completed translation [2023-09-01 03:41:39,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39 WrapperNode [2023-09-01 03:41:39,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 03:41:39,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 03:41:39,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 03:41:39,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 03:41:39,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,023 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-09-01 03:41:40,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 03:41:40,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 03:41:40,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 03:41:40,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 03:41:40,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 03:41:40,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 03:41:40,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 03:41:40,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 03:41:40,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (1/1) ... [2023-09-01 03:41:40,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 03:41:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:40,114 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) [2023-09-01 03:41:40,128 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 [2023-09-01 03:41:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 03:41:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 03:41:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 03:41:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 03:41:40,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 03:41:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 03:41:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 03:41:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 03:41:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 03:41:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 03:41:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 03:41:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 03:41:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 03:41:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 03:41:40,154 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 03:41:40,252 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 03:41:40,254 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 03:41:40,442 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 03:41:40,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 03:41:40,478 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-09-01 03:41:40,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:41:40 BoogieIcfgContainer [2023-09-01 03:41:40,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 03:41:40,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 03:41:40,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 03:41:40,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 03:41:40,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 03:41:39" (1/3) ... [2023-09-01 03:41:40,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dc760a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:41:40, skipping insertion in model container [2023-09-01 03:41:40,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 03:41:39" (2/3) ... [2023-09-01 03:41:40,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16dc760a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 03:41:40, skipping insertion in model container [2023-09-01 03:41:40,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 03:41:40" (3/3) ... [2023-09-01 03:41:40,487 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-09-01 03:41:40,502 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 03:41:40,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 03:41:40,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 03:41:40,549 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 03:41:40,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 192 flow [2023-09-01 03:41:40,643 INFO L130 PetriNetUnfolder]: 6/86 cut-off events. [2023-09-01 03:41:40,644 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:41:40,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 03:41:40,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 192 flow [2023-09-01 03:41:40,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 82 transitions, 176 flow [2023-09-01 03:41:40,660 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 03:41:40,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 82 transitions, 176 flow [2023-09-01 03:41:40,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 82 transitions, 176 flow [2023-09-01 03:41:40,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 176 flow [2023-09-01 03:41:40,714 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-09-01 03:41:40,714 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 03:41:40,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-09-01 03:41:40,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-09-01 03:41:43,309 INFO L134 LiptonReduction]: Checked pairs total: 665 [2023-09-01 03:41:43,310 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-09-01 03:41:43,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 03:41:43,328 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7db4df05, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 03:41:43,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-09-01 03:41:43,330 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-09-01 03:41:43,330 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:41:43,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:43,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 03:41:43,331 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:43,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash 356, now seen corresponding path program 1 times [2023-09-01 03:41:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:43,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695917672] [2023-09-01 03:41:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:43,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695917672] [2023-09-01 03:41:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695917672] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:43,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:43,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 03:41:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348069442] [2023-09-01 03:41:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 03:41:43,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 03:41:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 03:41:43,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-09-01 03:41:43,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:43,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-09-01 03:41:43,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:43,534 INFO L130 PetriNetUnfolder]: 100/163 cut-off events. [2023-09-01 03:41:43,534 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 03:41:43,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 506 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-09-01 03:41:43,538 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-09-01 03:41:43,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-09-01 03:41:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 03:41:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 03:41:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 176 transitions. [2023-09-01 03:41:43,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2023-09-01 03:41:43,585 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 176 transitions. [2023-09-01 03:41:43,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 176 transitions. [2023-09-01 03:41:43,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:43,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 176 transitions. [2023-09-01 03:41:43,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 88.0) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,624 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,629 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 176 transitions. [2023-09-01 03:41:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-09-01 03:41:43,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 03:41:43,633 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-09-01 03:41:43,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-09-01 03:41:43,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 03:41:43,638 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-09-01 03:41:43,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:43,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:41:43,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 03:41:43,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:43,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash 351786, now seen corresponding path program 1 times [2023-09-01 03:41:43,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:43,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001187189] [2023-09-01 03:41:43,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:43,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001187189] [2023-09-01 03:41:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001187189] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:43,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:43,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:41:43,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925972579] [2023-09-01 03:41:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:43,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:41:43,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:41:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:41:43,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-09-01 03:41:43,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:43,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-09-01 03:41:43,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:43,942 INFO L130 PetriNetUnfolder]: 93/150 cut-off events. [2023-09-01 03:41:43,942 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:41:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-09-01 03:41:43,944 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-09-01 03:41:43,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-09-01 03:41:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:41:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:41:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-09-01 03:41:43,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580896686159844 [2023-09-01 03:41:43,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-09-01 03:41:43,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-09-01 03:41:43,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:43,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-09-01 03:41:43,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,960 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 235 transitions. [2023-09-01 03:41:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-09-01 03:41:43,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 03:41:43,961 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-09-01 03:41:43,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-09-01 03:41:43,962 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-09-01 03:41:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-09-01 03:41:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:43,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:43,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 03:41:43,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 03:41:43,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:43,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash 351787, now seen corresponding path program 1 times [2023-09-01 03:41:43,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:43,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493447369] [2023-09-01 03:41:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:44,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493447369] [2023-09-01 03:41:44,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493447369] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:44,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:44,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:41:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498488513] [2023-09-01 03:41:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:41:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:41:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:41:44,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 171 [2023-09-01 03:41:44,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:44,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 171 [2023-09-01 03:41:44,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:44,123 INFO L130 PetriNetUnfolder]: 86/137 cut-off events. [2023-09-01 03:41:44,123 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:41:44,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 406 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-09-01 03:41:44,124 INFO L137 encePairwiseOnDemand]: 168/171 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-09-01 03:41:44,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-09-01 03:41:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:41:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:41:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 221 transitions. [2023-09-01 03:41:44,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43079922027290446 [2023-09-01 03:41:44,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 221 transitions. [2023-09-01 03:41:44,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 221 transitions. [2023-09-01 03:41:44,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:44,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 221 transitions. [2023-09-01 03:41:44,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,130 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,130 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 221 transitions. [2023-09-01 03:41:44,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-09-01 03:41:44,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:41:44,131 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-09-01 03:41:44,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-09-01 03:41:44,132 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 03:41:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-09-01 03:41:44,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:44,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:41:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 03:41:44,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:44,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash 338076062, now seen corresponding path program 1 times [2023-09-01 03:41:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:44,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383781765] [2023-09-01 03:41:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:44,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:44,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383781765] [2023-09-01 03:41:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383781765] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:44,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:44,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 03:41:44,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513475341] [2023-09-01 03:41:44,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:44,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:41:44,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:41:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:41:44,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-09-01 03:41:44,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:44,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-09-01 03:41:44,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:44,346 INFO L130 PetriNetUnfolder]: 65/107 cut-off events. [2023-09-01 03:41:44,346 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:41:44,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 282 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-09-01 03:41:44,347 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-09-01 03:41:44,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-09-01 03:41:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:41:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:41:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-09-01 03:41:44,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-09-01 03:41:44,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-09-01 03:41:44,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-09-01 03:41:44,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:44,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-09-01 03:41:44,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,352 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 207 transitions. [2023-09-01 03:41:44,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-09-01 03:41:44,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:41:44,353 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-09-01 03:41:44,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-09-01 03:41:44,354 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 03:41:44,354 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-09-01 03:41:44,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:44,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 03:41:44,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 03:41:44,355 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:44,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 338076064, now seen corresponding path program 1 times [2023-09-01 03:41:44,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:44,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480418901] [2023-09-01 03:41:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:44,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:44,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480418901] [2023-09-01 03:41:44,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480418901] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:44,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:44,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 03:41:44,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422357025] [2023-09-01 03:41:44,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:44,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 03:41:44,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 03:41:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 03:41:44,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-09-01 03:41:44,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:44,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-09-01 03:41:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:44,466 INFO L130 PetriNetUnfolder]: 44/77 cut-off events. [2023-09-01 03:41:44,466 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 03:41:44,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 169 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-09-01 03:41:44,467 INFO L137 encePairwiseOnDemand]: 169/171 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-09-01 03:41:44,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-09-01 03:41:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 03:41:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 03:41:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-09-01 03:41:44,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834307992202727 [2023-09-01 03:41:44,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-09-01 03:41:44,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-09-01 03:41:44,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:44,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-09-01 03:41:44,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,471 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 230 transitions. [2023-09-01 03:41:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-09-01 03:41:44,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:41:44,472 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-09-01 03:41:44,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-09-01 03:41:44,473 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-09-01 03:41:44,473 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-09-01 03:41:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:44,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 03:41:44,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:44,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash -423603408, now seen corresponding path program 1 times [2023-09-01 03:41:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80407491] [2023-09-01 03:41:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:44,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80407491] [2023-09-01 03:41:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80407491] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:44,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:44,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 03:41:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046534744] [2023-09-01 03:41:44,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:41:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:41:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 03:41:44,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-09-01 03:41:44,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:44,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-09-01 03:41:44,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:44,622 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-09-01 03:41:44,622 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 03:41:44,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 243 event pairs, 10 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-09-01 03:41:44,625 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-09-01 03:41:44,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-09-01 03:41:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:41:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:41:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 309 transitions. [2023-09-01 03:41:44,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517543859649123 [2023-09-01 03:41:44,627 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 309 transitions. [2023-09-01 03:41:44,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 309 transitions. [2023-09-01 03:41:44,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:44,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 309 transitions. [2023-09-01 03:41:44,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,630 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,630 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 309 transitions. [2023-09-01 03:41:44,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-09-01 03:41:44,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 03:41:44,632 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-09-01 03:41:44,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-09-01 03:41:44,634 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-09-01 03:41:44,635 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-09-01 03:41:44,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:44,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:44,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 03:41:44,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:44,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1614582855, now seen corresponding path program 1 times [2023-09-01 03:41:44,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:44,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607110361] [2023-09-01 03:41:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:44,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:44,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:44,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607110361] [2023-09-01 03:41:44,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607110361] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:44,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 03:41:44,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 03:41:44,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587586070] [2023-09-01 03:41:44,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:41:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:41:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:41:44,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 171 [2023-09-01 03:41:44,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:44,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 171 [2023-09-01 03:41:44,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:44,803 INFO L130 PetriNetUnfolder]: 55/100 cut-off events. [2023-09-01 03:41:44,804 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-09-01 03:41:44,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 100 events. 55/100 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 24 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 254. Up to 76 conditions per place. [2023-09-01 03:41:44,805 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 20 selfloop transitions, 5 changer transitions 2/27 dead transitions. [2023-09-01 03:41:44,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 132 flow [2023-09-01 03:41:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:41:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:41:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 373 transitions. [2023-09-01 03:41:44,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43625730994152045 [2023-09-01 03:41:44,807 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 373 transitions. [2023-09-01 03:41:44,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 373 transitions. [2023-09-01 03:41:44,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:44,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 373 transitions. [2023-09-01 03:41:44,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.6) internal successors, (373), 5 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,810 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,810 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 5 states and 373 transitions. [2023-09-01 03:41:44,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 132 flow [2023-09-01 03:41:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 123 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 03:41:44,812 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 75 flow [2023-09-01 03:41:44,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-09-01 03:41:44,812 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-09-01 03:41:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 75 flow [2023-09-01 03:41:44,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:44,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:44,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 03:41:44,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:44,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2104492941, now seen corresponding path program 2 times [2023-09-01 03:41:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098724299] [2023-09-01 03:41:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:44,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:44,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:44,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098724299] [2023-09-01 03:41:44,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098724299] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:44,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399157486] [2023-09-01 03:41:44,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:41:44,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:44,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:44,889 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) [2023-09-01 03:41:44,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 03:41:44,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:41:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:44,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 03:41:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:45,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 03:41:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399157486] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 03:41:45,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 03:41:45,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-09-01 03:41:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673940923] [2023-09-01 03:41:45,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 03:41:45,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 03:41:45,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 03:41:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:41:45,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 171 [2023-09-01 03:41:45,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:45,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 171 [2023-09-01 03:41:45,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:45,137 INFO L130 PetriNetUnfolder]: 62/112 cut-off events. [2023-09-01 03:41:45,152 INFO L131 PetriNetUnfolder]: For 46/53 co-relation queries the response was YES. [2023-09-01 03:41:45,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 112 events. 62/112 cut-off events. For 46/53 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 21 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 331. Up to 85 conditions per place. [2023-09-01 03:41:45,154 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 20 selfloop transitions, 5 changer transitions 0/26 dead transitions. [2023-09-01 03:41:45,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 149 flow [2023-09-01 03:41:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:41:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:41:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2023-09-01 03:41:45,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45760233918128657 [2023-09-01 03:41:45,156 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2023-09-01 03:41:45,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2023-09-01 03:41:45,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:45,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2023-09-01 03:41:45,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 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) [2023-09-01 03:41:45,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,159 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,159 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 75 flow. Second operand 4 states and 313 transitions. [2023-09-01 03:41:45,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 149 flow [2023-09-01 03:41:45,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 139 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 03:41:45,161 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 89 flow [2023-09-01 03:41:45,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-09-01 03:41:45,162 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-09-01 03:41:45,162 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 89 flow [2023-09-01 03:41:45,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:45,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:45,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:45,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:45,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:45,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1859779205, now seen corresponding path program 1 times [2023-09-01 03:41:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:45,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55965787] [2023-09-01 03:41:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:45,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:41:45,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:45,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55965787] [2023-09-01 03:41:45,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55965787] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103803303] [2023-09-01 03:41:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:45,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:45,425 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) [2023-09-01 03:41:45,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 03:41:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 03:41:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:41:45,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:41:45,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103803303] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:45,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:45,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-09-01 03:41:45,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259229275] [2023-09-01 03:41:45,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 03:41:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 03:41:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 03:41:45,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-09-01 03:41:45,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:45,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-09-01 03:41:45,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:45,708 INFO L130 PetriNetUnfolder]: 64/116 cut-off events. [2023-09-01 03:41:45,709 INFO L131 PetriNetUnfolder]: For 109/113 co-relation queries the response was YES. [2023-09-01 03:41:45,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 116 events. 64/116 cut-off events. For 109/113 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 272 event pairs, 10 based on Foata normal form. 4/101 useless extension candidates. Maximal degree in co-relation 373. Up to 81 conditions per place. [2023-09-01 03:41:45,710 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 26 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-09-01 03:41:45,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 208 flow [2023-09-01 03:41:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:41:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:41:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-09-01 03:41:45,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146198830409356 [2023-09-01 03:41:45,712 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-09-01 03:41:45,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-09-01 03:41:45,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:45,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-09-01 03:41:45,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,714 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,714 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 89 flow. Second operand 5 states and 386 transitions. [2023-09-01 03:41:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 208 flow [2023-09-01 03:41:45,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 188 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-09-01 03:41:45,716 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 120 flow [2023-09-01 03:41:45,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-09-01 03:41:45,717 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-09-01 03:41:45,717 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 120 flow [2023-09-01 03:41:45,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:45,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:45,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:45,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:45,922 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,SelfDestructingSolverStorable8 [2023-09-01 03:41:45,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:45,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash -972607855, now seen corresponding path program 2 times [2023-09-01 03:41:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534773700] [2023-09-01 03:41:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:46,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534773700] [2023-09-01 03:41:46,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534773700] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218138197] [2023-09-01 03:41:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:41:46,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:46,023 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) [2023-09-01 03:41:46,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 03:41:46,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:41:46,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:41:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:46,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218138197] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:46,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2023-09-01 03:41:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795566948] [2023-09-01 03:41:46,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:46,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 03:41:46,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 03:41:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 03:41:46,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-09-01 03:41:46,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 120 flow. Second operand has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:46,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:46,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-09-01 03:41:46,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:46,415 INFO L130 PetriNetUnfolder]: 112/210 cut-off events. [2023-09-01 03:41:46,415 INFO L131 PetriNetUnfolder]: For 246/250 co-relation queries the response was YES. [2023-09-01 03:41:46,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 210 events. 112/210 cut-off events. For 246/250 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 689 event pairs, 16 based on Foata normal form. 5/182 useless extension candidates. Maximal degree in co-relation 700. Up to 87 conditions per place. [2023-09-01 03:41:46,417 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 30 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-09-01 03:41:46,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 295 flow [2023-09-01 03:41:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 03:41:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 03:41:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2023-09-01 03:41:46,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956140350877193 [2023-09-01 03:41:46,419 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 339 transitions. [2023-09-01 03:41:46,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 339 transitions. [2023-09-01 03:41:46,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:46,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 339 transitions. [2023-09-01 03:41:46,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:46,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:46,422 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:46,422 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 120 flow. Second operand 4 states and 339 transitions. [2023-09-01 03:41:46,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 295 flow [2023-09-01 03:41:46,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 03:41:46,427 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 174 flow [2023-09-01 03:41:46,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2023-09-01 03:41:46,429 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2023-09-01 03:41:46,429 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 174 flow [2023-09-01 03:41:46,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:46,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:46,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:46,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:46,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:46,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:46,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 289175066, now seen corresponding path program 3 times [2023-09-01 03:41:46,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:46,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931537604] [2023-09-01 03:41:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:46,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:46,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:46,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931537604] [2023-09-01 03:41:46,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931537604] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995432526] [2023-09-01 03:41:46,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:41:46,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:46,761 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) [2023-09-01 03:41:46,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 03:41:46,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:41:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:41:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:46,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:47,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995432526] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:47,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:47,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-09-01 03:41:47,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052914015] [2023-09-01 03:41:47,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:47,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 03:41:47,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 03:41:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-09-01 03:41:47,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:47,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 174 flow. Second operand has 18 states, 18 states have (on average 69.22222222222223) internal successors, (1246), 18 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:47,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:47,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:47,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:47,670 INFO L130 PetriNetUnfolder]: 259/482 cut-off events. [2023-09-01 03:41:47,670 INFO L131 PetriNetUnfolder]: For 945/945 co-relation queries the response was YES. [2023-09-01 03:41:47,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 482 events. 259/482 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1943 event pairs, 25 based on Foata normal form. 42/524 useless extension candidates. Maximal degree in co-relation 1749. Up to 165 conditions per place. [2023-09-01 03:41:47,674 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 78 selfloop transitions, 42 changer transitions 4/124 dead transitions. [2023-09-01 03:41:47,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 124 transitions, 845 flow [2023-09-01 03:41:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 03:41:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 03:41:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1455 transitions. [2023-09-01 03:41:47,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-09-01 03:41:47,678 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1455 transitions. [2023-09-01 03:41:47,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1455 transitions. [2023-09-01 03:41:47,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:47,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1455 transitions. [2023-09-01 03:41:47,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 72.75) internal successors, (1455), 20 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:47,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:47,687 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:47,687 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 174 flow. Second operand 20 states and 1455 transitions. [2023-09-01 03:41:47,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 124 transitions, 845 flow [2023-09-01 03:41:47,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 124 transitions, 841 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-09-01 03:41:47,691 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 561 flow [2023-09-01 03:41:47,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=561, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-09-01 03:41:47,692 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-09-01 03:41:47,692 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 561 flow [2023-09-01 03:41:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.22222222222223) internal successors, (1246), 18 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:47,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:47,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:47,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-09-01 03:41:47,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:47,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:47,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:47,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1047829290, now seen corresponding path program 4 times [2023-09-01 03:41:47,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:47,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276143195] [2023-09-01 03:41:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:47,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:48,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:48,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276143195] [2023-09-01 03:41:48,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276143195] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:48,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269141490] [2023-09-01 03:41:48,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:41:48,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:48,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:48,034 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) [2023-09-01 03:41:48,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 03:41:48,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:41:48,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:48,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 03:41:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:48,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:48,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269141490] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:48,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-09-01 03:41:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994223181] [2023-09-01 03:41:48,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:41:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:41:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:41:48,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:48,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 561 flow. Second operand has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:48,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:48,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:48,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:48,711 INFO L130 PetriNetUnfolder]: 393/744 cut-off events. [2023-09-01 03:41:48,711 INFO L131 PetriNetUnfolder]: For 4625/4625 co-relation queries the response was YES. [2023-09-01 03:41:48,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 744 events. 393/744 cut-off events. For 4625/4625 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3474 event pairs, 25 based on Foata normal form. 12/756 useless extension candidates. Maximal degree in co-relation 3989. Up to 280 conditions per place. [2023-09-01 03:41:48,718 INFO L137 encePairwiseOnDemand]: 165/171 looper letters, 87 selfloop transitions, 47 changer transitions 11/145 dead transitions. [2023-09-01 03:41:48,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 145 transitions, 1456 flow [2023-09-01 03:41:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 03:41:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 03:41:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1171 transitions. [2023-09-01 03:41:48,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4279970760233918 [2023-09-01 03:41:48,721 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1171 transitions. [2023-09-01 03:41:48,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1171 transitions. [2023-09-01 03:41:48,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:48,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1171 transitions. [2023-09-01 03:41:48,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.1875) internal successors, (1171), 16 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:48,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:48,728 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 171.0) internal successors, (2907), 17 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:48,728 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 561 flow. Second operand 16 states and 1171 transitions. [2023-09-01 03:41:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 145 transitions, 1456 flow [2023-09-01 03:41:48,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 145 transitions, 1294 flow, removed 71 selfloop flow, removed 4 redundant places. [2023-09-01 03:41:48,743 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 825 flow [2023-09-01 03:41:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=825, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2023-09-01 03:41:48,744 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-09-01 03:41:48,744 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 825 flow [2023-09-01 03:41:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.21428571428571) internal successors, (969), 14 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:48,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:48,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 03:41:48,955 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:48,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:48,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1350612766, now seen corresponding path program 5 times [2023-09-01 03:41:48,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:48,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223128846] [2023-09-01 03:41:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:49,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223128846] [2023-09-01 03:41:49,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223128846] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:49,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562143880] [2023-09-01 03:41:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:41:49,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:49,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:49,052 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) [2023-09-01 03:41:49,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 03:41:49,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:41:49,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:49,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:41:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:49,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562143880] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:49,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 03:41:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347918103] [2023-09-01 03:41:49,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:49,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 03:41:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 03:41:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-09-01 03:41:49,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:49,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 825 flow. Second operand has 17 states, 17 states have (on average 69.52941176470588) internal successors, (1182), 17 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:49,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:49,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:49,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:49,836 INFO L130 PetriNetUnfolder]: 510/956 cut-off events. [2023-09-01 03:41:49,836 INFO L131 PetriNetUnfolder]: For 9182/9182 co-relation queries the response was YES. [2023-09-01 03:41:49,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5533 conditions, 956 events. 510/956 cut-off events. For 9182/9182 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4775 event pairs, 7 based on Foata normal form. 38/994 useless extension candidates. Maximal degree in co-relation 5506. Up to 439 conditions per place. [2023-09-01 03:41:49,846 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 84 selfloop transitions, 74 changer transitions 1/159 dead transitions. [2023-09-01 03:41:49,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 159 transitions, 1768 flow [2023-09-01 03:41:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 03:41:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 03:41:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1235 transitions. [2023-09-01 03:41:49,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42483660130718953 [2023-09-01 03:41:49,850 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1235 transitions. [2023-09-01 03:41:49,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1235 transitions. [2023-09-01 03:41:49,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:49,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1235 transitions. [2023-09-01 03:41:49,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 72.6470588235294) internal successors, (1235), 17 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:49,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:49,858 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:49,858 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 825 flow. Second operand 17 states and 1235 transitions. [2023-09-01 03:41:49,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 159 transitions, 1768 flow [2023-09-01 03:41:49,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1623 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-09-01 03:41:49,880 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1382 flow [2023-09-01 03:41:49,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1382, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2023-09-01 03:41:49,881 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-09-01 03:41:49,881 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1382 flow [2023-09-01 03:41:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.52941176470588) internal successors, (1182), 17 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:49,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:49,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:50,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:50,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:50,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2114754455, now seen corresponding path program 6 times [2023-09-01 03:41:50,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:50,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52093127] [2023-09-01 03:41:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:50,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:50,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:50,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52093127] [2023-09-01 03:41:50,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52093127] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:50,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263882599] [2023-09-01 03:41:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:41:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:50,237 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) [2023-09-01 03:41:50,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 03:41:50,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:41:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 03:41:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:50,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263882599] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:50,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 03:41:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599438125] [2023-09-01 03:41:50,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:41:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:41:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:41:50,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:50,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1382 flow. Second operand has 20 states, 20 states have (on average 69.05) internal successors, (1381), 20 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:50,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:50,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:50,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:51,199 INFO L130 PetriNetUnfolder]: 703/1373 cut-off events. [2023-09-01 03:41:51,199 INFO L131 PetriNetUnfolder]: For 31723/31723 co-relation queries the response was YES. [2023-09-01 03:41:51,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10356 conditions, 1373 events. 703/1373 cut-off events. For 31723/31723 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8014 event pairs, 18 based on Foata normal form. 16/1389 useless extension candidates. Maximal degree in co-relation 10320. Up to 417 conditions per place. [2023-09-01 03:41:51,215 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 118 selfloop transitions, 142 changer transitions 12/272 dead transitions. [2023-09-01 03:41:51,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 272 transitions, 3822 flow [2023-09-01 03:41:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 03:41:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 03:41:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1808 transitions. [2023-09-01 03:41:51,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42292397660818715 [2023-09-01 03:41:51,220 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1808 transitions. [2023-09-01 03:41:51,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1808 transitions. [2023-09-01 03:41:51,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:51,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1808 transitions. [2023-09-01 03:41:51,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 72.32) internal successors, (1808), 25 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:51,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:51,231 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 171.0) internal successors, (4446), 26 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:51,231 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1382 flow. Second operand 25 states and 1808 transitions. [2023-09-01 03:41:51,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 272 transitions, 3822 flow [2023-09-01 03:41:51,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 272 transitions, 3649 flow, removed 77 selfloop flow, removed 5 redundant places. [2023-09-01 03:41:51,314 INFO L231 Difference]: Finished difference. Result has 135 places, 183 transitions, 2833 flow [2023-09-01 03:41:51,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2833, PETRI_PLACES=135, PETRI_TRANSITIONS=183} [2023-09-01 03:41:51,314 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2023-09-01 03:41:51,315 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 183 transitions, 2833 flow [2023-09-01 03:41:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.05) internal successors, (1381), 20 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:51,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:51,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:51,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:51,520 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:51,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1554108490, now seen corresponding path program 7 times [2023-09-01 03:41:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:51,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077476432] [2023-09-01 03:41:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:51,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:51,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077476432] [2023-09-01 03:41:51,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077476432] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:51,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747997520] [2023-09-01 03:41:51,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:41:51,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:51,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:51,645 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) [2023-09-01 03:41:51,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 03:41:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:41:51,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:51,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747997520] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:51,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:51,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-09-01 03:41:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680296278] [2023-09-01 03:41:51,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:51,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:41:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:41:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:41:51,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:51,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 183 transitions, 2833 flow. Second operand has 16 states, 16 states have (on average 69.4375) internal successors, (1111), 16 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:51,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:51,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:52,646 INFO L130 PetriNetUnfolder]: 666/1353 cut-off events. [2023-09-01 03:41:52,647 INFO L131 PetriNetUnfolder]: For 51531/51531 co-relation queries the response was YES. [2023-09-01 03:41:52,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 1353 events. 666/1353 cut-off events. For 51531/51531 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8153 event pairs, 55 based on Foata normal form. 50/1403 useless extension candidates. Maximal degree in co-relation 11319. Up to 506 conditions per place. [2023-09-01 03:41:52,663 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 117 selfloop transitions, 136 changer transitions 8/261 dead transitions. [2023-09-01 03:41:52,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 261 transitions, 4075 flow [2023-09-01 03:41:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 03:41:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 03:41:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1594 transitions. [2023-09-01 03:41:52,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42371079213184476 [2023-09-01 03:41:52,666 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1594 transitions. [2023-09-01 03:41:52,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1594 transitions. [2023-09-01 03:41:52,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:52,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1594 transitions. [2023-09-01 03:41:52,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.45454545454545) internal successors, (1594), 22 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,677 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,677 INFO L175 Difference]: Start difference. First operand has 135 places, 183 transitions, 2833 flow. Second operand 22 states and 1594 transitions. [2023-09-01 03:41:52,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 261 transitions, 4075 flow [2023-09-01 03:41:52,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 261 transitions, 3342 flow, removed 356 selfloop flow, removed 6 redundant places. [2023-09-01 03:41:52,790 INFO L231 Difference]: Finished difference. Result has 153 places, 191 transitions, 2703 flow [2023-09-01 03:41:52,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2703, PETRI_PLACES=153, PETRI_TRANSITIONS=191} [2023-09-01 03:41:52,790 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2023-09-01 03:41:52,791 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 191 transitions, 2703 flow [2023-09-01 03:41:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.4375) internal successors, (1111), 16 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:52,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:52,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:52,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:52,996 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,SelfDestructingSolverStorable14 [2023-09-01 03:41:52,997 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:52,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:52,997 INFO L85 PathProgramCache]: Analyzing trace with hash -543608332, now seen corresponding path program 8 times [2023-09-01 03:41:52,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:52,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258652823] [2023-09-01 03:41:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:52,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:53,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258652823] [2023-09-01 03:41:53,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258652823] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:53,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861323865] [2023-09-01 03:41:53,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:41:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:53,100 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) [2023-09-01 03:41:53,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 03:41:53,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:41:53,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:41:53,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:53,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:53,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861323865] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:53,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:53,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-09-01 03:41:53,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170830487] [2023-09-01 03:41:53,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:53,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 03:41:53,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 03:41:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-09-01 03:41:53,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:53,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 191 transitions, 2703 flow. Second operand has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:53,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:53,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:53,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:53,917 INFO L130 PetriNetUnfolder]: 657/1313 cut-off events. [2023-09-01 03:41:53,917 INFO L131 PetriNetUnfolder]: For 42327/42327 co-relation queries the response was YES. [2023-09-01 03:41:53,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10418 conditions, 1313 events. 657/1313 cut-off events. For 42327/42327 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7846 event pairs, 17 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 10371. Up to 408 conditions per place. [2023-09-01 03:41:53,934 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 141 selfloop transitions, 108 changer transitions 9/258 dead transitions. [2023-09-01 03:41:53,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 258 transitions, 3951 flow [2023-09-01 03:41:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 03:41:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 03:41:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1435 transitions. [2023-09-01 03:41:53,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195906432748538 [2023-09-01 03:41:53,937 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1435 transitions. [2023-09-01 03:41:53,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1435 transitions. [2023-09-01 03:41:53,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:53,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1435 transitions. [2023-09-01 03:41:53,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 71.75) internal successors, (1435), 20 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:53,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:53,944 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 171.0) internal successors, (3591), 21 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:53,944 INFO L175 Difference]: Start difference. First operand has 153 places, 191 transitions, 2703 flow. Second operand 20 states and 1435 transitions. [2023-09-01 03:41:53,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 258 transitions, 3951 flow [2023-09-01 03:41:54,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 258 transitions, 3828 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-09-01 03:41:54,038 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 3137 flow [2023-09-01 03:41:54,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3137, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2023-09-01 03:41:54,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-09-01 03:41:54,041 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 3137 flow [2023-09-01 03:41:54,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.25) internal successors, (1108), 16 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:54,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:54,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:54,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 03:41:54,245 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:54,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash -508746160, now seen corresponding path program 9 times [2023-09-01 03:41:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818768764] [2023-09-01 03:41:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:54,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818768764] [2023-09-01 03:41:54,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818768764] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812559161] [2023-09-01 03:41:54,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:41:54,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:54,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:54,354 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) [2023-09-01 03:41:54,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 03:41:54,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 03:41:54,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:54,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:41:54,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:54,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:54,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812559161] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:54,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:54,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-09-01 03:41:54,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750733112] [2023-09-01 03:41:54,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:54,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 03:41:54,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:54,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 03:41:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 03:41:54,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-09-01 03:41:54,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 3137 flow. Second operand has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:54,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:54,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-09-01 03:41:54,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:55,152 INFO L130 PetriNetUnfolder]: 1070/2125 cut-off events. [2023-09-01 03:41:55,153 INFO L131 PetriNetUnfolder]: For 87960/87969 co-relation queries the response was YES. [2023-09-01 03:41:55,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18666 conditions, 2125 events. 1070/2125 cut-off events. For 87960/87969 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14061 event pairs, 155 based on Foata normal form. 9/2127 useless extension candidates. Maximal degree in co-relation 18615. Up to 905 conditions per place. [2023-09-01 03:41:55,181 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 208 selfloop transitions, 102 changer transitions 68/386 dead transitions. [2023-09-01 03:41:55,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 386 transitions, 6641 flow [2023-09-01 03:41:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 03:41:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 03:41:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 426 transitions. [2023-09-01 03:41:55,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4982456140350877 [2023-09-01 03:41:55,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 426 transitions. [2023-09-01 03:41:55,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 426 transitions. [2023-09-01 03:41:55,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:55,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 426 transitions. [2023-09-01 03:41:55,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:55,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:55,186 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:55,186 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 3137 flow. Second operand 5 states and 426 transitions. [2023-09-01 03:41:55,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 386 transitions, 6641 flow [2023-09-01 03:41:55,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 386 transitions, 6296 flow, removed 143 selfloop flow, removed 6 redundant places. [2023-09-01 03:41:55,412 INFO L231 Difference]: Finished difference. Result has 163 places, 273 transitions, 4630 flow [2023-09-01 03:41:55,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4630, PETRI_PLACES=163, PETRI_TRANSITIONS=273} [2023-09-01 03:41:55,413 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2023-09-01 03:41:55,413 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 273 transitions, 4630 flow [2023-09-01 03:41:55,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:55,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:55,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:55,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:55,619 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,SelfDestructingSolverStorable16 [2023-09-01 03:41:55,619 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:55,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540044, now seen corresponding path program 10 times [2023-09-01 03:41:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:55,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376574835] [2023-09-01 03:41:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:55,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:55,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376574835] [2023-09-01 03:41:55,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376574835] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:55,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168576669] [2023-09-01 03:41:55,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:41:55,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:55,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:55,747 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) [2023-09-01 03:41:55,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 03:41:55,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:41:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:41:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:41:55,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:41:55,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168576669] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:55,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:55,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 11 [2023-09-01 03:41:55,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46558376] [2023-09-01 03:41:55,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:55,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:41:55,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:41:55,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:41:55,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:55,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 273 transitions, 4630 flow. Second operand has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:55,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:55,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:55,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:56,617 INFO L130 PetriNetUnfolder]: 1044/2130 cut-off events. [2023-09-01 03:41:56,618 INFO L131 PetriNetUnfolder]: For 100983/100983 co-relation queries the response was YES. [2023-09-01 03:41:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18833 conditions, 2130 events. 1044/2130 cut-off events. For 100983/100983 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14360 event pairs, 144 based on Foata normal form. 78/2208 useless extension candidates. Maximal degree in co-relation 18779. Up to 1558 conditions per place. [2023-09-01 03:41:56,649 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 262 selfloop transitions, 92 changer transitions 50/404 dead transitions. [2023-09-01 03:41:56,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 404 transitions, 7078 flow [2023-09-01 03:41:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 03:41:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 03:41:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1393 transitions. [2023-09-01 03:41:56,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42874730686365037 [2023-09-01 03:41:56,652 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1393 transitions. [2023-09-01 03:41:56,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1393 transitions. [2023-09-01 03:41:56,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:56,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1393 transitions. [2023-09-01 03:41:56,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:56,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 171.0) internal successors, (3420), 20 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:56,658 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 171.0) internal successors, (3420), 20 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:56,659 INFO L175 Difference]: Start difference. First operand has 163 places, 273 transitions, 4630 flow. Second operand 19 states and 1393 transitions. [2023-09-01 03:41:56,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 404 transitions, 7078 flow [2023-09-01 03:41:56,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 404 transitions, 7004 flow, removed 37 selfloop flow, removed 0 redundant places. [2023-09-01 03:41:56,850 INFO L231 Difference]: Finished difference. Result has 188 places, 306 transitions, 5559 flow [2023-09-01 03:41:56,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5559, PETRI_PLACES=188, PETRI_TRANSITIONS=306} [2023-09-01 03:41:56,851 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2023-09-01 03:41:56,851 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 306 transitions, 5559 flow [2023-09-01 03:41:56,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:56,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:56,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:56,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-09-01 03:41:57,056 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,SelfDestructingSolverStorable17 [2023-09-01 03:41:57,057 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:57,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash 97342477, now seen corresponding path program 11 times [2023-09-01 03:41:57,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:57,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481085447] [2023-09-01 03:41:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:57,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:57,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481085447] [2023-09-01 03:41:57,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481085447] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:57,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198753438] [2023-09-01 03:41:57,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:41:57,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:57,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:57,205 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) [2023-09-01 03:41:57,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 03:41:57,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:41:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:41:57,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:57,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:41:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:57,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198753438] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:41:57,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:41:57,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-09-01 03:41:57,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7481362] [2023-09-01 03:41:57,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:41:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:41:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:41:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:41:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:41:57,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:41:57,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 306 transitions, 5559 flow. Second operand has 21 states, 21 states have (on average 69.19047619047619) internal successors, (1453), 21 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:57,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:41:57,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:41:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:41:58,987 INFO L130 PetriNetUnfolder]: 1329/2704 cut-off events. [2023-09-01 03:41:58,987 INFO L131 PetriNetUnfolder]: For 169816/169816 co-relation queries the response was YES. [2023-09-01 03:41:59,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26768 conditions, 2704 events. 1329/2704 cut-off events. For 169816/169816 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 19148 event pairs, 68 based on Foata normal form. 36/2740 useless extension candidates. Maximal degree in co-relation 26706. Up to 717 conditions per place. [2023-09-01 03:41:59,034 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 168 selfloop transitions, 317 changer transitions 55/540 dead transitions. [2023-09-01 03:41:59,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 540 transitions, 9909 flow [2023-09-01 03:41:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:41:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:41:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1760 transitions. [2023-09-01 03:41:59,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42884990253411304 [2023-09-01 03:41:59,037 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1760 transitions. [2023-09-01 03:41:59,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1760 transitions. [2023-09-01 03:41:59,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:41:59,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1760 transitions. [2023-09-01 03:41:59,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.33333333333333) internal successors, (1760), 24 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:59,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:59,045 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:59,045 INFO L175 Difference]: Start difference. First operand has 188 places, 306 transitions, 5559 flow. Second operand 24 states and 1760 transitions. [2023-09-01 03:41:59,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 540 transitions, 9909 flow [2023-09-01 03:41:59,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 540 transitions, 9641 flow, removed 74 selfloop flow, removed 7 redundant places. [2023-09-01 03:41:59,415 INFO L231 Difference]: Finished difference. Result has 211 places, 382 transitions, 7926 flow [2023-09-01 03:41:59,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7926, PETRI_PLACES=211, PETRI_TRANSITIONS=382} [2023-09-01 03:41:59,416 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-09-01 03:41:59,416 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 382 transitions, 7926 flow [2023-09-01 03:41:59,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.19047619047619) internal successors, (1453), 21 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:41:59,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:41:59,417 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:41:59,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 03:41:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:59,621 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:41:59,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:41:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1634372773, now seen corresponding path program 12 times [2023-09-01 03:41:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:41:59,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347057547] [2023-09-01 03:41:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:41:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:41:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:41:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:59,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:41:59,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347057547] [2023-09-01 03:41:59,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347057547] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:41:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946142511] [2023-09-01 03:41:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:41:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:41:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:41:59,759 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) [2023-09-01 03:41:59,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 03:41:59,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:41:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:41:59,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:41:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:41:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:41:59,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946142511] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:00,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-09-01 03:42:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311013416] [2023-09-01 03:42:00,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 03:42:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 03:42:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 03:42:00,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-09-01 03:42:00,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 382 transitions, 7926 flow. Second operand has 12 states, 12 states have (on average 78.58333333333333) internal successors, (943), 12 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:00,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:00,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-09-01 03:42:00,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:01,097 INFO L130 PetriNetUnfolder]: 1938/3896 cut-off events. [2023-09-01 03:42:01,097 INFO L131 PetriNetUnfolder]: For 273883/273892 co-relation queries the response was YES. [2023-09-01 03:42:01,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42427 conditions, 3896 events. 1938/3896 cut-off events. For 273883/273892 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29430 event pairs, 284 based on Foata normal form. 7/3898 useless extension candidates. Maximal degree in co-relation 42358. Up to 1434 conditions per place. [2023-09-01 03:42:01,248 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 318 selfloop transitions, 284 changer transitions 41/652 dead transitions. [2023-09-01 03:42:01,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 652 transitions, 14325 flow [2023-09-01 03:42:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 03:42:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 03:42:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 513 transitions. [2023-09-01 03:42:01,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-09-01 03:42:01,251 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 513 transitions. [2023-09-01 03:42:01,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 513 transitions. [2023-09-01 03:42:01,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:01,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 513 transitions. [2023-09-01 03:42:01,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:01,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:01,254 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:01,254 INFO L175 Difference]: Start difference. First operand has 211 places, 382 transitions, 7926 flow. Second operand 6 states and 513 transitions. [2023-09-01 03:42:01,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 652 transitions, 14325 flow [2023-09-01 03:42:01,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 652 transitions, 13556 flow, removed 350 selfloop flow, removed 9 redundant places. [2023-09-01 03:42:01,803 INFO L231 Difference]: Finished difference. Result has 211 places, 530 transitions, 11906 flow [2023-09-01 03:42:01,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11906, PETRI_PLACES=211, PETRI_TRANSITIONS=530} [2023-09-01 03:42:01,804 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2023-09-01 03:42:01,804 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 530 transitions, 11906 flow [2023-09-01 03:42:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 78.58333333333333) internal successors, (943), 12 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:01,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:01,805 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:01,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:02,009 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,SelfDestructingSolverStorable19 [2023-09-01 03:42:02,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:02,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:02,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1102853091, now seen corresponding path program 13 times [2023-09-01 03:42:02,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:02,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431595583] [2023-09-01 03:42:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:02,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:02,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:02,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431595583] [2023-09-01 03:42:02,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431595583] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:02,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866202070] [2023-09-01 03:42:02,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:42:02,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:02,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:02,169 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) [2023-09-01 03:42:02,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 03:42:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:02,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:42:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:02,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:02,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866202070] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:02,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:02,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-09-01 03:42:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584485452] [2023-09-01 03:42:02,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:02,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:42:02,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:42:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:42:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:02,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 530 transitions, 11906 flow. Second operand has 21 states, 21 states have (on average 69.04761904761905) internal successors, (1450), 21 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:02,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:02,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:04,751 INFO L130 PetriNetUnfolder]: 2318/4786 cut-off events. [2023-09-01 03:42:04,751 INFO L131 PetriNetUnfolder]: For 423533/423533 co-relation queries the response was YES. [2023-09-01 03:42:04,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53290 conditions, 4786 events. 2318/4786 cut-off events. For 423533/423533 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38363 event pairs, 141 based on Foata normal form. 178/4964 useless extension candidates. Maximal degree in co-relation 53220. Up to 1295 conditions per place. [2023-09-01 03:42:04,836 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 206 selfloop transitions, 576 changer transitions 28/810 dead transitions. [2023-09-01 03:42:04,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 810 transitions, 18389 flow [2023-09-01 03:42:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 03:42:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 03:42:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2413 transitions. [2023-09-01 03:42:04,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-09-01 03:42:04,841 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2413 transitions. [2023-09-01 03:42:04,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2413 transitions. [2023-09-01 03:42:04,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:04,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2413 transitions. [2023-09-01 03:42:04,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 73.12121212121212) internal successors, (2413), 33 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:04,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:04,852 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:04,852 INFO L175 Difference]: Start difference. First operand has 211 places, 530 transitions, 11906 flow. Second operand 33 states and 2413 transitions. [2023-09-01 03:42:04,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 810 transitions, 18389 flow [2023-09-01 03:42:05,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 810 transitions, 18089 flow, removed 144 selfloop flow, removed 1 redundant places. [2023-09-01 03:42:05,811 INFO L231 Difference]: Finished difference. Result has 251 places, 644 transitions, 16311 flow [2023-09-01 03:42:05,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=11708, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16311, PETRI_PLACES=251, PETRI_TRANSITIONS=644} [2023-09-01 03:42:05,812 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 222 predicate places. [2023-09-01 03:42:05,812 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 644 transitions, 16311 flow [2023-09-01 03:42:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 69.04761904761905) internal successors, (1450), 21 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:05,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:05,813 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:05,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:06,018 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:06,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash -59131429, now seen corresponding path program 14 times [2023-09-01 03:42:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:06,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587271905] [2023-09-01 03:42:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:06,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587271905] [2023-09-01 03:42:06,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587271905] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976160611] [2023-09-01 03:42:06,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:42:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:06,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:06,145 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) [2023-09-01 03:42:06,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 03:42:06,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:42:06,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:06,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:42:06,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:06,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:06,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976160611] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:06,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:06,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-09-01 03:42:06,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216406212] [2023-09-01 03:42:06,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 03:42:06,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 03:42:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-09-01 03:42:06,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:06,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 644 transitions, 16311 flow. Second operand has 21 states, 21 states have (on average 68.95238095238095) internal successors, (1448), 21 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:06,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:06,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:06,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:08,671 INFO L130 PetriNetUnfolder]: 2238/4514 cut-off events. [2023-09-01 03:42:08,671 INFO L131 PetriNetUnfolder]: For 436487/436487 co-relation queries the response was YES. [2023-09-01 03:42:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55618 conditions, 4514 events. 2238/4514 cut-off events. For 436487/436487 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35004 event pairs, 48 based on Foata normal form. 50/4564 useless extension candidates. Maximal degree in co-relation 55539. Up to 1227 conditions per place. [2023-09-01 03:42:08,728 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 149 selfloop transitions, 594 changer transitions 32/775 dead transitions. [2023-09-01 03:42:08,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 775 transitions, 19717 flow [2023-09-01 03:42:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 03:42:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 03:42:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2527 transitions. [2023-09-01 03:42:08,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-09-01 03:42:08,733 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2527 transitions. [2023-09-01 03:42:08,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2527 transitions. [2023-09-01 03:42:08,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:08,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2527 transitions. [2023-09-01 03:42:08,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 72.2) internal successors, (2527), 35 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:08,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:08,744 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 171.0) internal successors, (6156), 36 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:08,744 INFO L175 Difference]: Start difference. First operand has 251 places, 644 transitions, 16311 flow. Second operand 35 states and 2527 transitions. [2023-09-01 03:42:08,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 775 transitions, 19717 flow [2023-09-01 03:42:10,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 775 transitions, 19004 flow, removed 274 selfloop flow, removed 16 redundant places. [2023-09-01 03:42:10,119 INFO L231 Difference]: Finished difference. Result has 272 places, 649 transitions, 17165 flow [2023-09-01 03:42:10,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=15164, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=17165, PETRI_PLACES=272, PETRI_TRANSITIONS=649} [2023-09-01 03:42:10,120 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 243 predicate places. [2023-09-01 03:42:10,120 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 649 transitions, 17165 flow [2023-09-01 03:42:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 68.95238095238095) internal successors, (1448), 21 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:10,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:10,121 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:10,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:10,326 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:10,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash 146428741, now seen corresponding path program 15 times [2023-09-01 03:42:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:10,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7650746] [2023-09-01 03:42:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7650746] [2023-09-01 03:42:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7650746] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278629785] [2023-09-01 03:42:10,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:42:10,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:10,489 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) [2023-09-01 03:42:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 03:42:10,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:42:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 03:42:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:10,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:10,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278629785] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:10,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:10,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 03:42:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617559506] [2023-09-01 03:42:10,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:42:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:42:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:42:11,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:11,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 649 transitions, 17165 flow. Second operand has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:11,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:11,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:11,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:13,328 INFO L130 PetriNetUnfolder]: 2558/5151 cut-off events. [2023-09-01 03:42:13,328 INFO L131 PetriNetUnfolder]: For 523784/523784 co-relation queries the response was YES. [2023-09-01 03:42:13,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63644 conditions, 5151 events. 2558/5151 cut-off events. For 523784/523784 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40995 event pairs, 0 based on Foata normal form. 78/5229 useless extension candidates. Maximal degree in co-relation 63564. Up to 2052 conditions per place. [2023-09-01 03:42:13,396 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 510 selfloop transitions, 421 changer transitions 9/940 dead transitions. [2023-09-01 03:42:13,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 940 transitions, 24645 flow [2023-09-01 03:42:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 03:42:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 03:42:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2387 transitions. [2023-09-01 03:42:13,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42300194931773877 [2023-09-01 03:42:13,401 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2387 transitions. [2023-09-01 03:42:13,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2387 transitions. [2023-09-01 03:42:13,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:13,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2387 transitions. [2023-09-01 03:42:13,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.33333333333333) internal successors, (2387), 33 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:13,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:13,412 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:13,412 INFO L175 Difference]: Start difference. First operand has 272 places, 649 transitions, 17165 flow. Second operand 33 states and 2387 transitions. [2023-09-01 03:42:13,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 940 transitions, 24645 flow [2023-09-01 03:42:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 940 transitions, 23522 flow, removed 371 selfloop flow, removed 11 redundant places. [2023-09-01 03:42:14,932 INFO L231 Difference]: Finished difference. Result has 299 places, 794 transitions, 21345 flow [2023-09-01 03:42:14,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=16336, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21345, PETRI_PLACES=299, PETRI_TRANSITIONS=794} [2023-09-01 03:42:14,932 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 270 predicate places. [2023-09-01 03:42:14,933 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 794 transitions, 21345 flow [2023-09-01 03:42:14,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:14,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:14,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:14,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:15,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 03:42:15,134 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:15,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2135138407, now seen corresponding path program 16 times [2023-09-01 03:42:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:15,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358237571] [2023-09-01 03:42:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:15,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:15,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358237571] [2023-09-01 03:42:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358237571] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267508092] [2023-09-01 03:42:15,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:42:15,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:15,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:15,285 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) [2023-09-01 03:42:15,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 03:42:15,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:42:15,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:15,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 03:42:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:15,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 03:42:15,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267508092] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:15,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:15,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-09-01 03:42:15,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218444543] [2023-09-01 03:42:15,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:15,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 03:42:15,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 03:42:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-09-01 03:42:15,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:15,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 794 transitions, 21345 flow. Second operand has 20 states, 20 states have (on average 69.1) internal successors, (1382), 20 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:15,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:15,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:15,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:17,703 INFO L130 PetriNetUnfolder]: 2658/5331 cut-off events. [2023-09-01 03:42:17,703 INFO L131 PetriNetUnfolder]: For 530940/530940 co-relation queries the response was YES. [2023-09-01 03:42:17,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67399 conditions, 5331 events. 2658/5331 cut-off events. For 530940/530940 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 42573 event pairs, 185 based on Foata normal form. 40/5371 useless extension candidates. Maximal degree in co-relation 67311. Up to 4076 conditions per place. [2023-09-01 03:42:17,760 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 659 selfloop transitions, 256 changer transitions 5/920 dead transitions. [2023-09-01 03:42:17,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 920 transitions, 25396 flow [2023-09-01 03:42:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 03:42:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 03:42:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1592 transitions. [2023-09-01 03:42:17,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42317916002126527 [2023-09-01 03:42:17,773 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1592 transitions. [2023-09-01 03:42:17,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1592 transitions. [2023-09-01 03:42:17,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:17,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1592 transitions. [2023-09-01 03:42:17,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 72.36363636363636) internal successors, (1592), 22 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:17,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:17,782 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:17,782 INFO L175 Difference]: Start difference. First operand has 299 places, 794 transitions, 21345 flow. Second operand 22 states and 1592 transitions. [2023-09-01 03:42:17,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 920 transitions, 25396 flow [2023-09-01 03:42:19,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 920 transitions, 24473 flow, removed 375 selfloop flow, removed 14 redundant places. [2023-09-01 03:42:19,980 INFO L231 Difference]: Finished difference. Result has 311 places, 834 transitions, 22403 flow [2023-09-01 03:42:19,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=20446, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22403, PETRI_PLACES=311, PETRI_TRANSITIONS=834} [2023-09-01 03:42:19,981 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2023-09-01 03:42:19,981 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 834 transitions, 22403 flow [2023-09-01 03:42:19,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 69.1) internal successors, (1382), 20 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:19,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:19,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:19,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:20,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:20,185 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:20,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash 175668191, now seen corresponding path program 17 times [2023-09-01 03:42:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928674046] [2023-09-01 03:42:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:20,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:20,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928674046] [2023-09-01 03:42:20,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928674046] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:20,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017373355] [2023-09-01 03:42:20,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:42:20,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:20,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:20,312 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) [2023-09-01 03:42:20,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 03:42:20,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 03:42:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:42:20,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:20,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017373355] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:20,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:20,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-09-01 03:42:20,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692856371] [2023-09-01 03:42:20,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:20,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 03:42:20,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 03:42:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-09-01 03:42:20,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:20,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 834 transitions, 22403 flow. Second operand has 23 states, 23 states have (on average 68.95652173913044) internal successors, (1586), 23 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:20,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:20,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:20,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:23,463 INFO L130 PetriNetUnfolder]: 3344/6665 cut-off events. [2023-09-01 03:42:23,463 INFO L131 PetriNetUnfolder]: For 440084/440084 co-relation queries the response was YES. [2023-09-01 03:42:23,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76744 conditions, 6665 events. 3344/6665 cut-off events. For 440084/440084 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 54862 event pairs, 115 based on Foata normal form. 168/6833 useless extension candidates. Maximal degree in co-relation 76655. Up to 2171 conditions per place. [2023-09-01 03:42:23,537 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 341 selfloop transitions, 816 changer transitions 16/1173 dead transitions. [2023-09-01 03:42:23,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1173 transitions, 32454 flow [2023-09-01 03:42:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-09-01 03:42:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-09-01 03:42:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2246 transitions. [2023-09-01 03:42:23,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42369364270892285 [2023-09-01 03:42:23,541 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2246 transitions. [2023-09-01 03:42:23,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2246 transitions. [2023-09-01 03:42:23,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:23,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2246 transitions. [2023-09-01 03:42:23,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 72.45161290322581) internal successors, (2246), 31 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:23,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 171.0) internal successors, (5472), 32 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:23,549 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 171.0) internal successors, (5472), 32 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:23,549 INFO L175 Difference]: Start difference. First operand has 311 places, 834 transitions, 22403 flow. Second operand 31 states and 2246 transitions. [2023-09-01 03:42:23,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1173 transitions, 32454 flow [2023-09-01 03:42:25,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1173 transitions, 32210 flow, removed 54 selfloop flow, removed 10 redundant places. [2023-09-01 03:42:25,367 INFO L231 Difference]: Finished difference. Result has 340 places, 1043 transitions, 30535 flow [2023-09-01 03:42:25,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=22162, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30535, PETRI_PLACES=340, PETRI_TRANSITIONS=1043} [2023-09-01 03:42:25,368 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 311 predicate places. [2023-09-01 03:42:25,368 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1043 transitions, 30535 flow [2023-09-01 03:42:25,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 68.95652173913044) internal successors, (1586), 23 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:25,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:25,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:25,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-09-01 03:42:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:25,569 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:25,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1116808075, now seen corresponding path program 18 times [2023-09-01 03:42:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:25,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089660910] [2023-09-01 03:42:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:25,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:25,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089660910] [2023-09-01 03:42:25,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089660910] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:25,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313089031] [2023-09-01 03:42:25,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:42:25,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:25,703 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) [2023-09-01 03:42:25,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 03:42:25,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:42:25,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:25,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2023-09-01 03:42:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:25,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:26,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313089031] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:26,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:26,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-09-01 03:42:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307941672] [2023-09-01 03:42:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:26,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:42:26,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:42:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:42:26,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:26,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1043 transitions, 30535 flow. Second operand has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:26,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:26,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:26,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:29,059 INFO L130 PetriNetUnfolder]: 3581/7151 cut-off events. [2023-09-01 03:42:29,060 INFO L131 PetriNetUnfolder]: For 589481/589481 co-relation queries the response was YES. [2023-09-01 03:42:29,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86763 conditions, 7151 events. 3581/7151 cut-off events. For 589481/589481 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 59631 event pairs, 289 based on Foata normal form. 264/7415 useless extension candidates. Maximal degree in co-relation 86667. Up to 5620 conditions per place. [2023-09-01 03:42:29,153 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 980 selfloop transitions, 249 changer transitions 29/1258 dead transitions. [2023-09-01 03:42:29,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 1258 transitions, 37571 flow [2023-09-01 03:42:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 03:42:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 03:42:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2041 transitions. [2023-09-01 03:42:29,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262740183792815 [2023-09-01 03:42:29,157 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2041 transitions. [2023-09-01 03:42:29,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2041 transitions. [2023-09-01 03:42:29,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:29,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2041 transitions. [2023-09-01 03:42:29,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 72.89285714285714) internal successors, (2041), 28 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:29,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:29,164 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:29,164 INFO L175 Difference]: Start difference. First operand has 340 places, 1043 transitions, 30535 flow. Second operand 28 states and 2041 transitions. [2023-09-01 03:42:29,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 1258 transitions, 37571 flow [2023-09-01 03:42:31,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1258 transitions, 36901 flow, removed 283 selfloop flow, removed 14 redundant places. [2023-09-01 03:42:31,901 INFO L231 Difference]: Finished difference. Result has 363 places, 1125 transitions, 33378 flow [2023-09-01 03:42:31,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=29889, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=33378, PETRI_PLACES=363, PETRI_TRANSITIONS=1125} [2023-09-01 03:42:31,902 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 334 predicate places. [2023-09-01 03:42:31,902 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1125 transitions, 33378 flow [2023-09-01 03:42:31,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 69.04166666666667) internal successors, (1657), 24 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:31,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:31,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:31,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:32,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:32,111 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:32,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash -592511761, now seen corresponding path program 19 times [2023-09-01 03:42:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:32,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103461027] [2023-09-01 03:42:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:32,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103461027] [2023-09-01 03:42:32,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103461027] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:32,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924531452] [2023-09-01 03:42:32,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:42:32,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:32,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:32,236 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) [2023-09-01 03:42:32,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 03:42:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:42:32,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:32,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:32,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924531452] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:32,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:32,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-09-01 03:42:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323964998] [2023-09-01 03:42:32,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:32,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 03:42:32,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 03:42:32,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-09-01 03:42:32,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:32,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1125 transitions, 33378 flow. Second operand has 22 states, 22 states have (on average 68.9090909090909) internal successors, (1516), 22 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:32,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:32,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:32,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:36,355 INFO L130 PetriNetUnfolder]: 3792/7583 cut-off events. [2023-09-01 03:42:36,355 INFO L131 PetriNetUnfolder]: For 653853/653853 co-relation queries the response was YES. [2023-09-01 03:42:36,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97901 conditions, 7583 events. 3792/7583 cut-off events. For 653853/653853 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 63808 event pairs, 97 based on Foata normal form. 38/7621 useless extension candidates. Maximal degree in co-relation 97795. Up to 2075 conditions per place. [2023-09-01 03:42:36,466 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 709 selfloop transitions, 594 changer transitions 9/1312 dead transitions. [2023-09-01 03:42:36,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1312 transitions, 40624 flow [2023-09-01 03:42:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 03:42:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 03:42:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2375 transitions. [2023-09-01 03:42:36,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2023-09-01 03:42:36,469 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2375 transitions. [2023-09-01 03:42:36,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2375 transitions. [2023-09-01 03:42:36,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:36,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2375 transitions. [2023-09-01 03:42:36,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 71.96969696969697) internal successors, (2375), 33 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:36,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:36,477 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 171.0) internal successors, (5814), 34 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:36,477 INFO L175 Difference]: Start difference. First operand has 363 places, 1125 transitions, 33378 flow. Second operand 33 states and 2375 transitions. [2023-09-01 03:42:36,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1312 transitions, 40624 flow [2023-09-01 03:42:39,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1312 transitions, 39806 flow, removed 364 selfloop flow, removed 12 redundant places. [2023-09-01 03:42:39,980 INFO L231 Difference]: Finished difference. Result has 394 places, 1216 transitions, 38119 flow [2023-09-01 03:42:39,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=32461, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38119, PETRI_PLACES=394, PETRI_TRANSITIONS=1216} [2023-09-01 03:42:39,982 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 365 predicate places. [2023-09-01 03:42:39,982 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1216 transitions, 38119 flow [2023-09-01 03:42:39,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.9090909090909) internal successors, (1516), 22 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:39,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:39,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:39,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:40,188 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,SelfDestructingSolverStorable26 [2023-09-01 03:42:40,188 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:40,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1622501659, now seen corresponding path program 20 times [2023-09-01 03:42:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517073280] [2023-09-01 03:42:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:40,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517073280] [2023-09-01 03:42:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517073280] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323730700] [2023-09-01 03:42:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:42:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:40,352 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) [2023-09-01 03:42:40,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 03:42:40,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:42:40,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:42:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:40,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323730700] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:40,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-09-01 03:42:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189042604] [2023-09-01 03:42:40,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:40,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:42:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:42:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:42:41,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:41,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1216 transitions, 38119 flow. Second operand has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:41,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:41,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:41,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:45,575 INFO L130 PetriNetUnfolder]: 4227/8543 cut-off events. [2023-09-01 03:42:45,575 INFO L131 PetriNetUnfolder]: For 975015/975015 co-relation queries the response was YES. [2023-09-01 03:42:45,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116999 conditions, 8543 events. 4227/8543 cut-off events. For 975015/975015 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 73778 event pairs, 195 based on Foata normal form. 140/8683 useless extension candidates. Maximal degree in co-relation 116883. Up to 2052 conditions per place. [2023-09-01 03:42:45,708 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 597 selfloop transitions, 935 changer transitions 76/1608 dead transitions. [2023-09-01 03:42:45,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1608 transitions, 51832 flow [2023-09-01 03:42:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 03:42:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 03:42:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2730 transitions. [2023-09-01 03:42:45,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431484115694642 [2023-09-01 03:42:45,712 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2730 transitions. [2023-09-01 03:42:45,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2730 transitions. [2023-09-01 03:42:45,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:45,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2730 transitions. [2023-09-01 03:42:45,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.78378378378379) internal successors, (2730), 37 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:45,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:45,721 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:45,721 INFO L175 Difference]: Start difference. First operand has 394 places, 1216 transitions, 38119 flow. Second operand 37 states and 2730 transitions. [2023-09-01 03:42:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1608 transitions, 51832 flow [2023-09-01 03:42:51,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1608 transitions, 49532 flow, removed 1086 selfloop flow, removed 12 redundant places. [2023-09-01 03:42:51,509 INFO L231 Difference]: Finished difference. Result has 437 places, 1335 transitions, 44602 flow [2023-09-01 03:42:51,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=36806, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=821, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=44602, PETRI_PLACES=437, PETRI_TRANSITIONS=1335} [2023-09-01 03:42:51,510 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 408 predicate places. [2023-09-01 03:42:51,510 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1335 transitions, 44602 flow [2023-09-01 03:42:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:51,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:42:51,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:42:51,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 03:42:51,715 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,SelfDestructingSolverStorable27 [2023-09-01 03:42:51,716 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:42:51,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:42:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash -140687941, now seen corresponding path program 21 times [2023-09-01 03:42:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:42:51,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497465883] [2023-09-01 03:42:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:42:51,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:42:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:42:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:51,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:42:51,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497465883] [2023-09-01 03:42:51,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497465883] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:42:51,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337930406] [2023-09-01 03:42:51,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:42:51,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:42:51,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:42:51,877 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) [2023-09-01 03:42:51,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 03:42:51,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 03:42:51,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:42:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 03:42:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:42:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:52,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:42:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:42:52,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337930406] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:42:52,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:42:52,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-09-01 03:42:52,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115845157] [2023-09-01 03:42:52,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:42:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 03:42:52,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:42:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 03:42:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-09-01 03:42:52,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:42:52,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1335 transitions, 44602 flow. Second operand has 26 states, 26 states have (on average 68.8076923076923) internal successors, (1789), 26 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:52,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:42:52,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:42:52,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:42:58,245 INFO L130 PetriNetUnfolder]: 5038/10178 cut-off events. [2023-09-01 03:42:58,245 INFO L131 PetriNetUnfolder]: For 1267455/1267455 co-relation queries the response was YES. [2023-09-01 03:42:58,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142979 conditions, 10178 events. 5038/10178 cut-off events. For 1267455/1267455 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 90629 event pairs, 299 based on Foata normal form. 276/10454 useless extension candidates. Maximal degree in co-relation 142844. Up to 3548 conditions per place. [2023-09-01 03:42:58,686 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 719 selfloop transitions, 1042 changer transitions 56/1817 dead transitions. [2023-09-01 03:42:58,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 1817 transitions, 62042 flow [2023-09-01 03:42:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 03:42:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 03:42:58,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2689 transitions. [2023-09-01 03:42:58,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250039513197408 [2023-09-01 03:42:58,690 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2689 transitions. [2023-09-01 03:42:58,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2689 transitions. [2023-09-01 03:42:58,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:42:58,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2689 transitions. [2023-09-01 03:42:58,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 72.67567567567568) internal successors, (2689), 37 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:58,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:58,697 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 171.0) internal successors, (6498), 38 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:42:58,698 INFO L175 Difference]: Start difference. First operand has 437 places, 1335 transitions, 44602 flow. Second operand 37 states and 2689 transitions. [2023-09-01 03:42:58,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 1817 transitions, 62042 flow [2023-09-01 03:43:06,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1817 transitions, 59615 flow, removed 658 selfloop flow, removed 12 redundant places. [2023-09-01 03:43:06,950 INFO L231 Difference]: Finished difference. Result has 471 places, 1587 transitions, 54764 flow [2023-09-01 03:43:06,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42796, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=797, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=54764, PETRI_PLACES=471, PETRI_TRANSITIONS=1587} [2023-09-01 03:43:06,952 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 442 predicate places. [2023-09-01 03:43:06,952 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1587 transitions, 54764 flow [2023-09-01 03:43:06,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.8076923076923) internal successors, (1789), 26 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:06,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:43:06,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:43:06,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 03:43:07,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 03:43:07,154 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:43:07,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:43:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1138747277, now seen corresponding path program 22 times [2023-09-01 03:43:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:43:07,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747095085] [2023-09-01 03:43:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:43:07,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:43:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:43:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:07,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:43:07,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747095085] [2023-09-01 03:43:07,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747095085] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:43:07,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941056001] [2023-09-01 03:43:07,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:43:07,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:43:07,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:43:07,293 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) [2023-09-01 03:43:07,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 03:43:07,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:43:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:43:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 03:43:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:43:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:07,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:43:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:07,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941056001] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:43:07,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:43:07,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-09-01 03:43:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273524885] [2023-09-01 03:43:07,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:43:07,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 03:43:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:43:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 03:43:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-09-01 03:43:07,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:43:07,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1587 transitions, 54764 flow. Second operand has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:07,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:43:07,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:43:07,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:43:15,335 INFO L130 PetriNetUnfolder]: 5553/11278 cut-off events. [2023-09-01 03:43:15,335 INFO L131 PetriNetUnfolder]: For 1544536/1544536 co-relation queries the response was YES. [2023-09-01 03:43:15,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161095 conditions, 11278 events. 5553/11278 cut-off events. For 1544536/1544536 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 102166 event pairs, 529 based on Foata normal form. 336/11614 useless extension candidates. Maximal degree in co-relation 160951. Up to 8254 conditions per place. [2023-09-01 03:43:15,506 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 1391 selfloop transitions, 484 changer transitions 21/1896 dead transitions. [2023-09-01 03:43:15,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1896 transitions, 67630 flow [2023-09-01 03:43:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 03:43:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 03:43:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1748 transitions. [2023-09-01 03:43:15,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2023-09-01 03:43:15,509 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1748 transitions. [2023-09-01 03:43:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1748 transitions. [2023-09-01 03:43:15,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:43:15,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1748 transitions. [2023-09-01 03:43:15,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 72.83333333333333) internal successors, (1748), 24 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:15,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:15,514 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 171.0) internal successors, (4275), 25 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:15,514 INFO L175 Difference]: Start difference. First operand has 471 places, 1587 transitions, 54764 flow. Second operand 24 states and 1748 transitions. [2023-09-01 03:43:15,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1896 transitions, 67630 flow [2023-09-01 03:43:26,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1896 transitions, 66833 flow, removed 335 selfloop flow, removed 14 redundant places. [2023-09-01 03:43:26,871 INFO L231 Difference]: Finished difference. Result has 490 places, 1773 transitions, 62551 flow [2023-09-01 03:43:26,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=53900, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=62551, PETRI_PLACES=490, PETRI_TRANSITIONS=1773} [2023-09-01 03:43:26,873 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 461 predicate places. [2023-09-01 03:43:26,874 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1773 transitions, 62551 flow [2023-09-01 03:43:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.75) internal successors, (1650), 24 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:26,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:43:26,874 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:43:26,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 03:43:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:43:27,083 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:43:27,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:43:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash 188047156, now seen corresponding path program 23 times [2023-09-01 03:43:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:43:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835438208] [2023-09-01 03:43:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:43:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:43:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:43:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:43:27,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835438208] [2023-09-01 03:43:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835438208] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:43:27,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448831644] [2023-09-01 03:43:27,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:43:27,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:43:27,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:43:27,257 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) [2023-09-01 03:43:27,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 03:43:27,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:43:27,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:43:27,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 03:43:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:43:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:43:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448831644] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:43:27,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:43:27,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-09-01 03:43:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187606022] [2023-09-01 03:43:27,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:43:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 03:43:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:43:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 03:43:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-09-01 03:43:27,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:43:27,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1773 transitions, 62551 flow. Second operand has 26 states, 26 states have (on average 68.92307692307692) internal successors, (1792), 26 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:27,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:43:27,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:43:27,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:43:39,087 INFO L130 PetriNetUnfolder]: 6742/13746 cut-off events. [2023-09-01 03:43:39,087 INFO L131 PetriNetUnfolder]: For 1789014/1789014 co-relation queries the response was YES. [2023-09-01 03:43:39,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203140 conditions, 13746 events. 6742/13746 cut-off events. For 1789014/1789014 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 128610 event pairs, 11 based on Foata normal form. 54/13800 useless extension candidates. Maximal degree in co-relation 202987. Up to 2783 conditions per place. [2023-09-01 03:43:39,351 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 532 selfloop transitions, 1959 changer transitions 143/2634 dead transitions. [2023-09-01 03:43:39,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2634 transitions, 90594 flow [2023-09-01 03:43:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-09-01 03:43:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-09-01 03:43:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4084 transitions. [2023-09-01 03:43:39,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264828738512949 [2023-09-01 03:43:39,357 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4084 transitions. [2023-09-01 03:43:39,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4084 transitions. [2023-09-01 03:43:39,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:43:39,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4084 transitions. [2023-09-01 03:43:39,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 72.92857142857143) internal successors, (4084), 56 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:39,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 171.0) internal successors, (9747), 57 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:39,371 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 171.0) internal successors, (9747), 57 states have internal predecessors, (9747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:39,371 INFO L175 Difference]: Start difference. First operand has 490 places, 1773 transitions, 62551 flow. Second operand 56 states and 4084 transitions. [2023-09-01 03:43:39,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 2634 transitions, 90594 flow [2023-09-01 03:43:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 2634 transitions, 89834 flow, removed 351 selfloop flow, removed 9 redundant places. [2023-09-01 03:43:56,341 INFO L231 Difference]: Finished difference. Result has 546 places, 2146 transitions, 82271 flow [2023-09-01 03:43:56,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=61920, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=82271, PETRI_PLACES=546, PETRI_TRANSITIONS=2146} [2023-09-01 03:43:56,343 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 517 predicate places. [2023-09-01 03:43:56,343 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 2146 transitions, 82271 flow [2023-09-01 03:43:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.92307692307692) internal successors, (1792), 26 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:56,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:43:56,343 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:43:56,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 03:43:56,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:43:56,544 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:43:56,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:43:56,544 INFO L85 PathProgramCache]: Analyzing trace with hash 509811766, now seen corresponding path program 24 times [2023-09-01 03:43:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:43:56,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960644713] [2023-09-01 03:43:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:43:56,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:43:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:43:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:56,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:43:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960644713] [2023-09-01 03:43:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960644713] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:43:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823938846] [2023-09-01 03:43:56,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:43:56,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:43:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:43:56,685 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) [2023-09-01 03:43:56,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 03:43:56,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:43:56,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:43:56,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 03:43:56,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:43:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:56,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:43:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:43:56,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823938846] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:43:56,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:43:56,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7] total 12 [2023-09-01 03:43:56,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68983538] [2023-09-01 03:43:56,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:43:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 03:43:56,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:43:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 03:43:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-09-01 03:43:57,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 171 [2023-09-01 03:43:57,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 2146 transitions, 82271 flow. Second operand has 14 states, 14 states have (on average 73.85714285714286) internal successors, (1034), 14 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:43:57,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:43:57,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 171 [2023-09-01 03:43:57,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:44:12,596 INFO L130 PetriNetUnfolder]: 9240/18698 cut-off events. [2023-09-01 03:44:12,596 INFO L131 PetriNetUnfolder]: For 2377307/2377307 co-relation queries the response was YES. [2023-09-01 03:44:12,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288147 conditions, 18698 events. 9240/18698 cut-off events. For 2377307/2377307 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 181618 event pairs, 614 based on Foata normal form. 2/18697 useless extension candidates. Maximal degree in co-relation 287983. Up to 6914 conditions per place. [2023-09-01 03:44:12,947 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 1434 selfloop transitions, 1692 changer transitions 105/3234 dead transitions. [2023-09-01 03:44:12,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 3234 transitions, 125914 flow [2023-09-01 03:44:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 03:44:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 03:44:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 645 transitions. [2023-09-01 03:44:12,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47149122807017546 [2023-09-01 03:44:12,949 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 645 transitions. [2023-09-01 03:44:12,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 645 transitions. [2023-09-01 03:44:12,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:44:12,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 645 transitions. [2023-09-01 03:44:12,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.625) internal successors, (645), 8 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,952 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:12,952 INFO L175 Difference]: Start difference. First operand has 546 places, 2146 transitions, 82271 flow. Second operand 8 states and 645 transitions. [2023-09-01 03:44:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 3234 transitions, 125914 flow [2023-09-01 03:44:50,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 3234 transitions, 119678 flow, removed 2991 selfloop flow, removed 15 redundant places. [2023-09-01 03:44:51,047 INFO L231 Difference]: Finished difference. Result has 543 places, 2878 transitions, 113416 flow [2023-09-01 03:44:51,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=78387, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=113416, PETRI_PLACES=543, PETRI_TRANSITIONS=2878} [2023-09-01 03:44:51,049 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 514 predicate places. [2023-09-01 03:44:51,049 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2878 transitions, 113416 flow [2023-09-01 03:44:51,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.85714285714286) internal successors, (1034), 14 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:51,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:44:51,050 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:44:51,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 03:44:51,251 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,SelfDestructingSolverStorable31 [2023-09-01 03:44:51,251 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:44:51,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:44:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1833610942, now seen corresponding path program 25 times [2023-09-01 03:44:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:44:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396954589] [2023-09-01 03:44:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:44:51,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:44:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:51,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:44:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396954589] [2023-09-01 03:44:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396954589] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:44:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360897216] [2023-09-01 03:44:51,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 03:44:51,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:44:51,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:44:51,448 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) [2023-09-01 03:44:51,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 03:44:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:44:51,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:44:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:44:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:51,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:44:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:44:51,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360897216] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:44:51,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:44:51,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-09-01 03:44:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4863499] [2023-09-01 03:44:51,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:44:51,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 03:44:51,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:44:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 03:44:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-09-01 03:44:52,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:44:52,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2878 transitions, 113416 flow. Second operand has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:44:52,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:44:52,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:44:52,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:45:13,722 INFO L130 PetriNetUnfolder]: 9958/20158 cut-off events. [2023-09-01 03:45:13,722 INFO L131 PetriNetUnfolder]: For 1534322/1534322 co-relation queries the response was YES. [2023-09-01 03:45:14,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287433 conditions, 20158 events. 9958/20158 cut-off events. For 1534322/1534322 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 198048 event pairs, 245 based on Foata normal form. 104/20262 useless extension candidates. Maximal degree in co-relation 287268. Up to 6308 conditions per place. [2023-09-01 03:45:14,241 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 509 selfloop transitions, 2819 changer transitions 65/3393 dead transitions. [2023-09-01 03:45:14,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 3393 transitions, 134106 flow [2023-09-01 03:45:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-09-01 03:45:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-09-01 03:45:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2770 transitions. [2023-09-01 03:45:14,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262850107725454 [2023-09-01 03:45:14,243 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2770 transitions. [2023-09-01 03:45:14,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2770 transitions. [2023-09-01 03:45:14,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:45:14,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2770 transitions. [2023-09-01 03:45:14,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 72.89473684210526) internal successors, (2770), 38 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:14,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:14,250 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 171.0) internal successors, (6669), 39 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:14,250 INFO L175 Difference]: Start difference. First operand has 543 places, 2878 transitions, 113416 flow. Second operand 38 states and 2770 transitions. [2023-09-01 03:45:14,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 3393 transitions, 134106 flow [2023-09-01 03:45:48,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3393 transitions, 132983 flow, removed 534 selfloop flow, removed 4 redundant places. [2023-09-01 03:45:48,691 INFO L231 Difference]: Finished difference. Result has 587 places, 3127 transitions, 129886 flow [2023-09-01 03:45:48,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=112398, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=129886, PETRI_PLACES=587, PETRI_TRANSITIONS=3127} [2023-09-01 03:45:48,694 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 558 predicate places. [2023-09-01 03:45:48,694 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 3127 transitions, 129886 flow [2023-09-01 03:45:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:48,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:45:48,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:45:48,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 03:45:48,895 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,SelfDestructingSolverStorable32 [2023-09-01 03:45:48,895 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:45:48,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:45:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1439251158, now seen corresponding path program 26 times [2023-09-01 03:45:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:45:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757499495] [2023-09-01 03:45:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:45:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:45:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:45:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:49,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:45:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757499495] [2023-09-01 03:45:49,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757499495] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:45:49,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706138997] [2023-09-01 03:45:49,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 03:45:49,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:45:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:45:49,065 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) [2023-09-01 03:45:49,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 03:45:49,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 03:45:49,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:45:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:45:49,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:45:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:49,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:45:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:45:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706138997] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:45:49,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:45:49,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-09-01 03:45:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915863568] [2023-09-01 03:45:49,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:45:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 03:45:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:45:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 03:45:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-09-01 03:45:49,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:45:49,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 3127 transitions, 129886 flow. Second operand has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:45:49,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:45:49,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:45:49,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:46:16,581 INFO L130 PetriNetUnfolder]: 10318/20836 cut-off events. [2023-09-01 03:46:16,581 INFO L131 PetriNetUnfolder]: For 1774133/1774133 co-relation queries the response was YES. [2023-09-01 03:46:16,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307647 conditions, 20836 events. 10318/20836 cut-off events. For 1774133/1774133 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 205597 event pairs, 245 based on Foata normal form. 140/20976 useless extension candidates. Maximal degree in co-relation 307472. Up to 5606 conditions per place. [2023-09-01 03:46:17,039 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 519 selfloop transitions, 2942 changer transitions 78/3539 dead transitions. [2023-09-01 03:46:17,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3539 transitions, 147554 flow [2023-09-01 03:46:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-09-01 03:46:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-09-01 03:46:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3058 transitions. [2023-09-01 03:46:17,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42578668894458366 [2023-09-01 03:46:17,042 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3058 transitions. [2023-09-01 03:46:17,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3058 transitions. [2023-09-01 03:46:17,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:46:17,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3058 transitions. [2023-09-01 03:46:17,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 72.80952380952381) internal successors, (3058), 42 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:46:17,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:46:17,049 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 171.0) internal successors, (7353), 43 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:46:17,050 INFO L175 Difference]: Start difference. First operand has 587 places, 3127 transitions, 129886 flow. Second operand 42 states and 3058 transitions. [2023-09-01 03:46:17,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3539 transitions, 147554 flow [2023-09-01 03:46:55,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 3539 transitions, 146986 flow, removed 197 selfloop flow, removed 13 redundant places. [2023-09-01 03:46:56,017 INFO L231 Difference]: Finished difference. Result has 622 places, 3246 transitions, 140773 flow [2023-09-01 03:46:56,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=129346, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=140773, PETRI_PLACES=622, PETRI_TRANSITIONS=3246} [2023-09-01 03:46:56,020 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 593 predicate places. [2023-09-01 03:46:56,020 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 3246 transitions, 140773 flow [2023-09-01 03:46:56,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.96296296296296) internal successors, (1862), 27 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:46:56,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:46:56,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:46:56,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-09-01 03:46:56,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:46:56,221 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:46:56,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:46:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash -858364034, now seen corresponding path program 27 times [2023-09-01 03:46:56,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:46:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307660116] [2023-09-01 03:46:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:46:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:46:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:46:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:46:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:46:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307660116] [2023-09-01 03:46:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307660116] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:46:56,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532157683] [2023-09-01 03:46:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 03:46:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:46:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:46:56,385 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) [2023-09-01 03:46:56,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 03:46:56,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-09-01 03:46:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:46:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:46:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:46:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:46:56,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:46:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:46:56,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532157683] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:46:56,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:46:56,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-09-01 03:46:56,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68777085] [2023-09-01 03:46:56,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:46:56,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 03:46:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:46:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 03:46:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-09-01 03:46:56,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:46:56,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 3246 transitions, 140773 flow. Second operand has 27 states, 27 states have (on average 68.74074074074075) internal successors, (1856), 27 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:46:56,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:46:56,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:46:56,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:47:31,448 INFO L130 PetriNetUnfolder]: 11707/23649 cut-off events. [2023-09-01 03:47:31,449 INFO L131 PetriNetUnfolder]: For 2117157/2117157 co-relation queries the response was YES. [2023-09-01 03:47:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360974 conditions, 23649 events. 11707/23649 cut-off events. For 2117157/2117157 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 237517 event pairs, 299 based on Foata normal form. 58/23707 useless extension candidates. Maximal degree in co-relation 360792. Up to 4804 conditions per place. [2023-09-01 03:47:32,064 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 401 selfloop transitions, 3627 changer transitions 145/4173 dead transitions. [2023-09-01 03:47:32,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 4173 transitions, 176425 flow [2023-09-01 03:47:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-09-01 03:47:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-09-01 03:47:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 8826 transitions. [2023-09-01 03:47:32,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41624221844934917 [2023-09-01 03:47:32,072 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 8826 transitions. [2023-09-01 03:47:32,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 8826 transitions. [2023-09-01 03:47:32,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:47:32,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 8826 transitions. [2023-09-01 03:47:32,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 71.1774193548387) internal successors, (8826), 124 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 171.0) internal successors, (21375), 125 states have internal predecessors, (21375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,102 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 171.0) internal successors, (21375), 125 states have internal predecessors, (21375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:47:32,103 INFO L175 Difference]: Start difference. First operand has 622 places, 3246 transitions, 140773 flow. Second operand 124 states and 8826 transitions. [2023-09-01 03:47:32,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 4173 transitions, 176425 flow [2023-09-01 03:48:24,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 4173 transitions, 175789 flow, removed 185 selfloop flow, removed 17 redundant places. [2023-09-01 03:48:24,536 INFO L231 Difference]: Finished difference. Result has 744 places, 3785 transitions, 172067 flow [2023-09-01 03:48:24,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=139798, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3080, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=172067, PETRI_PLACES=744, PETRI_TRANSITIONS=3785} [2023-09-01 03:48:24,539 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 715 predicate places. [2023-09-01 03:48:24,539 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 3785 transitions, 172067 flow [2023-09-01 03:48:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.74074074074075) internal successors, (1856), 27 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:24,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:48:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:48:24,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 03:48:24,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:48:24,740 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:48:24,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:48:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash 574148990, now seen corresponding path program 28 times [2023-09-01 03:48:24,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:48:24,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339477964] [2023-09-01 03:48:24,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:48:24,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:48:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:48:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:24,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:48:24,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339477964] [2023-09-01 03:48:24,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339477964] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:48:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242593242] [2023-09-01 03:48:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 03:48:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:48:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:48:24,907 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:48:24,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 03:48:24,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 03:48:24,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:48:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 03:48:24,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:48:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:25,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:48:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:48:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242593242] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:48:25,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:48:25,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-09-01 03:48:25,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996702557] [2023-09-01 03:48:25,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:48:25,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 03:48:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:48:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 03:48:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-09-01 03:48:25,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:48:25,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 3785 transitions, 172067 flow. Second operand has 25 states, 25 states have (on average 68.84) internal successors, (1721), 25 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:48:25,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:48:25,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:48:25,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:49:04,331 INFO L130 PetriNetUnfolder]: 12599/24874 cut-off events. [2023-09-01 03:49:04,331 INFO L131 PetriNetUnfolder]: For 2538421/2538421 co-relation queries the response was YES. [2023-09-01 03:49:05,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405304 conditions, 24874 events. 12599/24874 cut-off events. For 2538421/2538421 co-relation queries the response was YES. Maximal size of possible extension queue 1916. Compared 246555 event pairs, 735 based on Foata normal form. 326/25200 useless extension candidates. Maximal degree in co-relation 405106. Up to 13784 conditions per place. [2023-09-01 03:49:05,151 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 2397 selfloop transitions, 1997 changer transitions 19/4413 dead transitions. [2023-09-01 03:49:05,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4413 transitions, 202831 flow [2023-09-01 03:49:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-09-01 03:49:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-09-01 03:49:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3540 transitions. [2023-09-01 03:49:05,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248478338703904 [2023-09-01 03:49:05,154 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3540 transitions. [2023-09-01 03:49:05,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3540 transitions. [2023-09-01 03:49:05,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:49:05,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3540 transitions. [2023-09-01 03:49:05,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 72.24489795918367) internal successors, (3540), 49 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:05,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:05,163 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 171.0) internal successors, (8550), 50 states have internal predecessors, (8550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:49:05,163 INFO L175 Difference]: Start difference. First operand has 744 places, 3785 transitions, 172067 flow. Second operand 49 states and 3540 transitions. [2023-09-01 03:49:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4413 transitions, 202831 flow [2023-09-01 03:50:15,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4413 transitions, 193395 flow, removed 1621 selfloop flow, removed 37 redundant places. [2023-09-01 03:50:15,430 INFO L231 Difference]: Finished difference. Result has 746 places, 4156 transitions, 186373 flow [2023-09-01 03:50:15,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=163436, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=186373, PETRI_PLACES=746, PETRI_TRANSITIONS=4156} [2023-09-01 03:50:15,434 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 717 predicate places. [2023-09-01 03:50:15,434 INFO L495 AbstractCegarLoop]: Abstraction has has 746 places, 4156 transitions, 186373 flow [2023-09-01 03:50:15,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 68.84) internal successors, (1721), 25 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:50:15,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:50:15,435 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:50:15,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 03:50:15,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:50:15,641 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:50:15,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:50:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash 552436930, now seen corresponding path program 29 times [2023-09-01 03:50:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:50:15,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698124703] [2023-09-01 03:50:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:50:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:50:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:50:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:50:15,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:50:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698124703] [2023-09-01 03:50:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698124703] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:50:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904565586] [2023-09-01 03:50:15,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 03:50:15,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:50:15,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:50:15,793 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:50:15,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 03:50:15,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 03:50:15,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:50:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:50:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:50:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:50:15,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:50:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:50:16,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904565586] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:50:16,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:50:16,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-09-01 03:50:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119054156] [2023-09-01 03:50:16,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:50:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 03:50:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:50:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 03:50:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-09-01 03:50:16,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:50:16,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 4156 transitions, 186373 flow. Second operand has 28 states, 28 states have (on average 68.92857142857143) internal successors, (1930), 28 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:50:16,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:50:16,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:50:16,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:51:06,197 INFO L130 PetriNetUnfolder]: 13394/26381 cut-off events. [2023-09-01 03:51:06,197 INFO L131 PetriNetUnfolder]: For 2604260/2604260 co-relation queries the response was YES. [2023-09-01 03:51:07,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424189 conditions, 26381 events. 13394/26381 cut-off events. For 2604260/2604260 co-relation queries the response was YES. Maximal size of possible extension queue 2082. Compared 263526 event pairs, 269 based on Foata normal form. 162/26543 useless extension candidates. Maximal degree in co-relation 423988. Up to 7465 conditions per place. [2023-09-01 03:51:07,531 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 881 selfloop transitions, 3756 changer transitions 24/4661 dead transitions. [2023-09-01 03:51:07,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 4661 transitions, 213478 flow [2023-09-01 03:51:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 03:51:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 03:51:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2974 transitions. [2023-09-01 03:51:07,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42419055769505065 [2023-09-01 03:51:07,533 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2974 transitions. [2023-09-01 03:51:07,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2974 transitions. [2023-09-01 03:51:07,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:51:07,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2974 transitions. [2023-09-01 03:51:07,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.53658536585365) internal successors, (2974), 41 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:07,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:07,541 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:51:07,541 INFO L175 Difference]: Start difference. First operand has 746 places, 4156 transitions, 186373 flow. Second operand 41 states and 2974 transitions. [2023-09-01 03:51:07,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 4661 transitions, 213478 flow [2023-09-01 03:52:26,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 4661 transitions, 212095 flow, removed 242 selfloop flow, removed 33 redundant places. [2023-09-01 03:52:27,131 INFO L231 Difference]: Finished difference. Result has 764 places, 4445 transitions, 209446 flow [2023-09-01 03:52:27,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=185036, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=209446, PETRI_PLACES=764, PETRI_TRANSITIONS=4445} [2023-09-01 03:52:27,134 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 735 predicate places. [2023-09-01 03:52:27,134 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 4445 transitions, 209446 flow [2023-09-01 03:52:27,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 68.92857142857143) internal successors, (1930), 28 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:27,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 03:52:27,135 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 03:52:27,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 03:52:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 03:52:27,342 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-09-01 03:52:27,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 03:52:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2129741782, now seen corresponding path program 30 times [2023-09-01 03:52:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 03:52:27,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706516804] [2023-09-01 03:52:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 03:52:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 03:52:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 03:52:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:27,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 03:52:27,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706516804] [2023-09-01 03:52:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706516804] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 03:52:27,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494477521] [2023-09-01 03:52:27,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 03:52:27,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 03:52:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 03:52:27,491 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 03:52:27,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 03:52:27,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 03:52:27,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 03:52:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 03:52:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 03:52:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:27,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 03:52:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 03:52:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494477521] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 03:52:27,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 03:52:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-09-01 03:52:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263828492] [2023-09-01 03:52:27,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 03:52:27,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 03:52:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 03:52:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 03:52:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2023-09-01 03:52:28,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-09-01 03:52:28,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 4445 transitions, 209446 flow. Second operand has 29 states, 29 states have (on average 68.89655172413794) internal successors, (1998), 29 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:52:28,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 03:52:28,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-09-01 03:52:28,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 03:53:35,269 INFO L130 PetriNetUnfolder]: 16029/31401 cut-off events. [2023-09-01 03:53:35,269 INFO L131 PetriNetUnfolder]: For 3615009/3615009 co-relation queries the response was YES. [2023-09-01 03:53:36,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525037 conditions, 31401 events. 16029/31401 cut-off events. For 3615009/3615009 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 320211 event pairs, 311 based on Foata normal form. 496/31897 useless extension candidates. Maximal degree in co-relation 524827. Up to 10211 conditions per place. [2023-09-01 03:53:37,088 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 1463 selfloop transitions, 4078 changer transitions 80/5621 dead transitions. [2023-09-01 03:53:37,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 805 places, 5621 transitions, 269411 flow [2023-09-01 03:53:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 03:53:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 03:53:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3119 transitions. [2023-09-01 03:53:37,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42418060655514755 [2023-09-01 03:53:37,090 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3119 transitions. [2023-09-01 03:53:37,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3119 transitions. [2023-09-01 03:53:37,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 03:53:37,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3119 transitions. [2023-09-01 03:53:37,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 72.53488372093024) internal successors, (3119), 43 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:37,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 171.0) internal successors, (7524), 44 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:37,096 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 171.0) internal successors, (7524), 44 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 03:53:37,096 INFO L175 Difference]: Start difference. First operand has 764 places, 4445 transitions, 209446 flow. Second operand 43 states and 3119 transitions. [2023-09-01 03:53:37,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 805 places, 5621 transitions, 269411 flow Killed by 15