./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 07:03:16,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 07:03:16,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 07:03:16,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 07:03:16,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 07:03:16,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 07:03:16,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 07:03:16,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 07:03:16,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 07:03:16,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 07:03:16,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 07:03:16,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 07:03:16,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 07:03:16,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 07:03:16,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 07:03:16,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 07:03:16,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 07:03:16,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 07:03:16,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 07:03:16,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 07:03:16,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 07:03:16,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 07:03:16,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 07:03:16,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 07:03:16,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 07:03:16,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 07:03:16,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 07:03:16,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 07:03:16,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 07:03:16,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 07:03:16,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 07:03:16,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 07:03:16,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 07:03:16,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 07:03:16,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 07:03:16,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 07:03:16,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 07:03:16,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 07:03:16,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 07:03:16,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 07:03:16,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 07:03:16,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 07:03:17,018 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 07:03:17,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 07:03:17,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 07:03:17,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 07:03:17,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 07:03:17,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 07:03:17,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 07:03:17,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 07:03:17,021 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 07:03:17,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 07:03:17,022 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 07:03:17,022 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 07:03:17,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 07:03:17,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 07:03:17,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 07:03:17,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 07:03:17,023 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 07:03:17,023 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 07:03:17,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 07:03:17,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 07:03:17,023 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 07:03:17,023 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 07:03:17,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 07:03:17,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 07:03:17,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 07:03:17,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:03:17,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 07:03:17,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 07:03:17,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 07:03:17,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 07:03:17,025 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 07:03:17,025 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 07:03:17,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 07:03:17,025 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 07:03:17,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 07:03:17,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 07:03:17,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 07:03:17,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 07:03:17,291 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 07:03:17,295 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 07:03:17,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-30 07:03:18,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 07:03:18,662 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 07:03:18,662 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-30 07:03:18,669 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b646d8264/a174ca3972e140c7bd26e86e90ea5503/FLAG43bc7fcd3 [2023-08-30 07:03:18,687 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b646d8264/a174ca3972e140c7bd26e86e90ea5503 [2023-08-30 07:03:18,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 07:03:18,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 07:03:18,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 07:03:18,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 07:03:18,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 07:03:18,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:18,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d82770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18, skipping insertion in model container [2023-08-30 07:03:18,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:18,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 07:03:18,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 07:03:18,906 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-mult-4.wvr.c[2612,2625] [2023-08-30 07:03:18,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:03:18,923 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 07:03:18,961 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-mult-4.wvr.c[2612,2625] [2023-08-30 07:03:18,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 07:03:18,972 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:03:18,973 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 07:03:18,979 INFO L208 MainTranslator]: Completed translation [2023-08-30 07:03:18,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18 WrapperNode [2023-08-30 07:03:18,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 07:03:18,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 07:03:18,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 07:03:18,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 07:03:18,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,023 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-30 07:03:19,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 07:03:19,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 07:03:19,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 07:03:19,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 07:03:19,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,048 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 07:03:19,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 07:03:19,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 07:03:19,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 07:03:19,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (1/1) ... [2023-08-30 07:03:19,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 07:03:19,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:19,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 07:03:19,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 07:03:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 07:03:19,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 07:03:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 07:03:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 07:03:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 07:03:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 07:03:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 07:03:19,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 07:03:19,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 07:03:19,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 07:03:19,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 07:03:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 07:03:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 07:03:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 07:03:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 07:03:19,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 07:03:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 07:03:19,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 07:03:19,166 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 07:03:19,247 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 07:03:19,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 07:03:19,498 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 07:03:19,531 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 07:03:19,531 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 07:03:19,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:03:19 BoogieIcfgContainer [2023-08-30 07:03:19,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 07:03:19,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 07:03:19,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 07:03:19,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 07:03:19,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:03:18" (1/3) ... [2023-08-30 07:03:19,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699c937f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:03:19, skipping insertion in model container [2023-08-30 07:03:19,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:03:18" (2/3) ... [2023-08-30 07:03:19,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699c937f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:03:19, skipping insertion in model container [2023-08-30 07:03:19,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:03:19" (3/3) ... [2023-08-30 07:03:19,550 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-08-30 07:03:19,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 07:03:19,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 07:03:19,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 07:03:19,673 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 07:03:19,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 148 transitions, 328 flow [2023-08-30 07:03:19,785 INFO L130 PetriNetUnfolder]: 10/144 cut-off events. [2023-08-30 07:03:19,785 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 07:03:19,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 144 events. 10/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-30 07:03:19,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 148 transitions, 328 flow [2023-08-30 07:03:19,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 140 transitions, 304 flow [2023-08-30 07:03:19,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 07:03:19,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 140 transitions, 304 flow [2023-08-30 07:03:19,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 140 transitions, 304 flow [2023-08-30 07:03:19,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 140 transitions, 304 flow [2023-08-30 07:03:19,823 INFO L130 PetriNetUnfolder]: 10/140 cut-off events. [2023-08-30 07:03:19,823 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 07:03:19,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 140 events. 10/140 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-30 07:03:19,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2023-08-30 07:03:23,381 INFO L134 LiptonReduction]: Checked pairs total: 3407 [2023-08-30 07:03:23,381 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-30 07:03:23,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 07:03:23,402 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;@30e65d60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 07:03:23,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-30 07:03:23,403 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 07:03:23,404 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 07:03:23,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:23,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 07:03:23,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:23,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash 577, now seen corresponding path program 1 times [2023-08-30 07:03:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:23,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287621063] [2023-08-30 07:03:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:23,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:23,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287621063] [2023-08-30 07:03:23,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287621063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:23,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:23,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 07:03:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816705047] [2023-08-30 07:03:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 07:03:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 07:03:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 07:03:23,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 278 [2023-08-30 07:03:23,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:23,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:23,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 278 [2023-08-30 07:03:23,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:23,853 INFO L130 PetriNetUnfolder]: 2518/3157 cut-off events. [2023-08-30 07:03:23,854 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 07:03:23,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6409 conditions, 3157 events. 2518/3157 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11209 event pairs, 1179 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 4953. Up to 3127 conditions per place. [2023-08-30 07:03:23,877 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-30 07:03:23,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-30 07:03:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 07:03:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 07:03:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 304 transitions. [2023-08-30 07:03:23,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467625899280576 [2023-08-30 07:03:23,891 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 304 transitions. [2023-08-30 07:03:23,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 304 transitions. [2023-08-30 07:03:23,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:23,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 304 transitions. [2023-08-30 07:03:23,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 152.0) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:23,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:23,902 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:23,903 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 116 flow. Second operand 2 states and 304 transitions. [2023-08-30 07:03:23,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-30 07:03:23,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 07:03:23,910 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-30 07:03:23,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-30 07:03:23,914 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 07:03:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-30 07:03:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:23,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:23,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:03:23,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 07:03:23,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:23,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash 566674, now seen corresponding path program 1 times [2023-08-30 07:03:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544447596] [2023-08-30 07:03:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:24,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:24,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544447596] [2023-08-30 07:03:24,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544447596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:24,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:24,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:24,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356482872] [2023-08-30 07:03:24,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:24,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:24,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:24,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:24,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:24,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:24,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:24,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:24,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:24,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:24,559 INFO L130 PetriNetUnfolder]: 2407/3016 cut-off events. [2023-08-30 07:03:24,559 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:24,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 3016 events. 2407/3016 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10641 event pairs, 1124 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6041. Up to 2985 conditions per place. [2023-08-30 07:03:24,577 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-30 07:03:24,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-30 07:03:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-30 07:03:24,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4784172661870504 [2023-08-30 07:03:24,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-30 07:03:24,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-30 07:03:24,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:24,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-30 07:03:24,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:24,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:24,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:24,590 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 399 transitions. [2023-08-30 07:03:24,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-30 07:03:24,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 07:03:24,592 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-30 07:03:24,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-30 07:03:24,593 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -10 predicate places. [2023-08-30 07:03:24,593 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-30 07:03:24,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:24,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:24,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 07:03:24,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 07:03:24,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:24,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 566676, now seen corresponding path program 1 times [2023-08-30 07:03:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:24,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046607624] [2023-08-30 07:03:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:24,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046607624] [2023-08-30 07:03:24,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046607624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:24,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:24,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095444533] [2023-08-30 07:03:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:24,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-08-30 07:03:24,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:24,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:24,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-08-30 07:03:24,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:25,072 INFO L130 PetriNetUnfolder]: 2296/2875 cut-off events. [2023-08-30 07:03:25,073 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:25,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5764 conditions, 2875 events. 2296/2875 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10020 event pairs, 1069 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 5760. Up to 2844 conditions per place. [2023-08-30 07:03:25,090 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-30 07:03:25,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-30 07:03:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-30 07:03:25,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49760191846522783 [2023-08-30 07:03:25,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-30 07:03:25,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-30 07:03:25,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:25,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-30 07:03:25,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,096 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 415 transitions. [2023-08-30 07:03:25,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-30 07:03:25,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:25,098 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-30 07:03:25,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-30 07:03:25,100 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -11 predicate places. [2023-08-30 07:03:25,102 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-30 07:03:25,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:25,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:03:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 07:03:25,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:25,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 544587944, now seen corresponding path program 1 times [2023-08-30 07:03:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:25,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883049207] [2023-08-30 07:03:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:25,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:25,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883049207] [2023-08-30 07:03:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883049207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:25,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:25,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:25,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551417812] [2023-08-30 07:03:25,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:25,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:25,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:25,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:25,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:25,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:25,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:25,434 INFO L130 PetriNetUnfolder]: 2251/2812 cut-off events. [2023-08-30 07:03:25,434 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:25,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5639 conditions, 2812 events. 2251/2812 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9750 event pairs, 1048 based on Foata normal form. 0/1354 useless extension candidates. Maximal degree in co-relation 5635. Up to 2781 conditions per place. [2023-08-30 07:03:25,449 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-30 07:03:25,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-30 07:03:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-30 07:03:25,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473621103117506 [2023-08-30 07:03:25,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-30 07:03:25,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-30 07:03:25,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:25,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-30 07:03:25,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,470 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 395 transitions. [2023-08-30 07:03:25,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-30 07:03:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:25,472 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-30 07:03:25,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-30 07:03:25,475 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -12 predicate places. [2023-08-30 07:03:25,475 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-30 07:03:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:25,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 07:03:25,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 07:03:25,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:25,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash 544587945, now seen corresponding path program 1 times [2023-08-30 07:03:25,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:25,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966410612] [2023-08-30 07:03:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966410612] [2023-08-30 07:03:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966410612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961126473] [2023-08-30 07:03:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:25,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:25,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-08-30 07:03:25,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:25,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-08-30 07:03:25,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:25,836 INFO L130 PetriNetUnfolder]: 2206/2749 cut-off events. [2023-08-30 07:03:25,836 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:25,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 2749 events. 2206/2749 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 9468 event pairs, 1027 based on Foata normal form. 0/1330 useless extension candidates. Maximal degree in co-relation 5510. Up to 2718 conditions per place. [2023-08-30 07:03:25,848 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-30 07:03:25,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-30 07:03:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:25,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-30 07:03:25,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49280575539568344 [2023-08-30 07:03:25,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-30 07:03:25,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-30 07:03:25,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:25,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-30 07:03:25,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,853 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,853 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 411 transitions. [2023-08-30 07:03:25,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-30 07:03:25,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:25,854 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-30 07:03:25,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-30 07:03:25,856 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 07:03:25,856 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-30 07:03:25,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:25,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:25,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 07:03:25,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:25,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash -636983692, now seen corresponding path program 1 times [2023-08-30 07:03:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:25,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042694769] [2023-08-30 07:03:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:25,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042694769] [2023-08-30 07:03:25,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042694769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:25,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:25,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:25,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295670217] [2023-08-30 07:03:25,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:25,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:25,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:25,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:25,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 278 [2023-08-30 07:03:25,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:25,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:25,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 278 [2023-08-30 07:03:25,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:26,071 INFO L130 PetriNetUnfolder]: 2103/2616 cut-off events. [2023-08-30 07:03:26,071 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:26,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5249 conditions, 2616 events. 2103/2616 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8908 event pairs, 980 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 5245. Up to 2585 conditions per place. [2023-08-30 07:03:26,081 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 07:03:26,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-30 07:03:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-30 07:03:26,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904076738609113 [2023-08-30 07:03:26,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-30 07:03:26,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-30 07:03:26,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:26,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-30 07:03:26,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,086 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 409 transitions. [2023-08-30 07:03:26,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-30 07:03:26,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:26,087 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-30 07:03:26,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-30 07:03:26,087 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -14 predicate places. [2023-08-30 07:03:26,088 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-30 07:03:26,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:26,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 07:03:26,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:26,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash -636983693, now seen corresponding path program 1 times [2023-08-30 07:03:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45489525] [2023-08-30 07:03:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:26,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:26,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45489525] [2023-08-30 07:03:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45489525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:26,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:26,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830731741] [2023-08-30 07:03:26,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:26,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:26,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:26,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:26,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:26,262 INFO L130 PetriNetUnfolder]: 2000/2483 cut-off events. [2023-08-30 07:03:26,262 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:26,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4984 conditions, 2483 events. 2000/2483 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8348 event pairs, 933 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 4980. Up to 2452 conditions per place. [2023-08-30 07:03:26,271 INFO L137 encePairwiseOnDemand]: 275/278 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 07:03:26,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-30 07:03:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-30 07:03:26,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46642685851318944 [2023-08-30 07:03:26,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-30 07:03:26,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-30 07:03:26,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:26,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-30 07:03:26,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,276 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 389 transitions. [2023-08-30 07:03:26,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-30 07:03:26,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:26,277 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-30 07:03:26,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-30 07:03:26,277 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 07:03:26,278 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-30 07:03:26,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:26,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:26,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 07:03:26,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:26,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2039006695, now seen corresponding path program 1 times [2023-08-30 07:03:26,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:26,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531228286] [2023-08-30 07:03:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:26,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:26,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531228286] [2023-08-30 07:03:26,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531228286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:26,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 07:03:26,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834572948] [2023-08-30 07:03:26,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:26,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:03:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:03:26,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:03:26,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 278 [2023-08-30 07:03:26,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:26,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 278 [2023-08-30 07:03:26,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:26,606 INFO L130 PetriNetUnfolder]: 1586/1988 cut-off events. [2023-08-30 07:03:26,606 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:26,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 1988 events. 1586/1988 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6524 event pairs, 735 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3991. Up to 1957 conditions per place. [2023-08-30 07:03:26,624 INFO L137 encePairwiseOnDemand]: 276/278 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 07:03:26,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-30 07:03:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-30 07:03:26,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568345323741007 [2023-08-30 07:03:26,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-30 07:03:26,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-30 07:03:26,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:26,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-30 07:03:26,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,630 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-08-30 07:03:26,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-30 07:03:26,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:26,631 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-30 07:03:26,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-30 07:03:26,631 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 07:03:26,631 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-30 07:03:26,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:26,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:26,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 07:03:26,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:26,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2039006694, now seen corresponding path program 1 times [2023-08-30 07:03:26,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:26,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713609375] [2023-08-30 07:03:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:26,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:26,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713609375] [2023-08-30 07:03:26,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713609375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:26,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:26,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:03:26,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572066241] [2023-08-30 07:03:26,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:26,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 07:03:26,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:26,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 07:03:26,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-30 07:03:26,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 278 [2023-08-30 07:03:26,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:26,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 278 [2023-08-30 07:03:26,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:26,910 INFO L130 PetriNetUnfolder]: 1172/1493 cut-off events. [2023-08-30 07:03:26,910 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 07:03:26,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 1493 events. 1172/1493 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4782 event pairs, 537 based on Foata normal form. 0/840 useless extension candidates. Maximal degree in co-relation 3002. Up to 1462 conditions per place. [2023-08-30 07:03:26,916 INFO L137 encePairwiseOnDemand]: 276/278 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-30 07:03:26,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-30 07:03:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2023-08-30 07:03:26,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196642685851319 [2023-08-30 07:03:26,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2023-08-30 07:03:26,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2023-08-30 07:03:26,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:26,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2023-08-30 07:03:26,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,921 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,921 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 350 transitions. [2023-08-30 07:03:26,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-30 07:03:26,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:26,922 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-30 07:03:26,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-30 07:03:26,922 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -15 predicate places. [2023-08-30 07:03:26,922 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-30 07:03:26,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.5) internal successors, (657), 6 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:26,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:26,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:26,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 07:03:26,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:26,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2084028512, now seen corresponding path program 1 times [2023-08-30 07:03:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:26,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790539896] [2023-08-30 07:03:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:26,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:27,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:27,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790539896] [2023-08-30 07:03:27,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790539896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:27,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:27,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 07:03:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031755136] [2023-08-30 07:03:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:27,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 07:03:27,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:27,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 07:03:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 07:03:27,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 278 [2023-08-30 07:03:27,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:27,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 278 [2023-08-30 07:03:27,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:27,112 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-08-30 07:03:27,112 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 07:03:27,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3516 conditions, 1736 events. 1343/1736 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5871 event pairs, 215 based on Foata normal form. 1/1043 useless extension candidates. Maximal degree in co-relation 3512. Up to 1515 conditions per place. [2023-08-30 07:03:27,118 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-08-30 07:03:27,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 212 flow [2023-08-30 07:03:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 07:03:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 07:03:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-30 07:03:27,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5179856115107914 [2023-08-30 07:03:27,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-30 07:03:27,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-30 07:03:27,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:27,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-30 07:03:27,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,122 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 432 transitions. [2023-08-30 07:03:27,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 212 flow [2023-08-30 07:03:27,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:27,124 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 97 flow [2023-08-30 07:03:27,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-30 07:03:27,124 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -13 predicate places. [2023-08-30 07:03:27,124 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 97 flow [2023-08-30 07:03:27,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:27,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:27,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 07:03:27,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:27,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1296728902, now seen corresponding path program 1 times [2023-08-30 07:03:27,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:27,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883612055] [2023-08-30 07:03:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:27,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883612055] [2023-08-30 07:03:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883612055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:03:27,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862399568] [2023-08-30 07:03:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:27,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:03:27,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:03:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:03:27,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:27,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:27,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:27,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:27,446 INFO L130 PetriNetUnfolder]: 1964/2742 cut-off events. [2023-08-30 07:03:27,446 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2023-08-30 07:03:27,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6376 conditions, 2742 events. 1964/2742 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12439 event pairs, 503 based on Foata normal form. 304/2992 useless extension candidates. Maximal degree in co-relation 6371. Up to 1387 conditions per place. [2023-08-30 07:03:27,456 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-08-30 07:03:27,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 82 transitions, 392 flow [2023-08-30 07:03:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:03:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:03:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 682 transitions. [2023-08-30 07:03:27,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906474820143885 [2023-08-30 07:03:27,459 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 682 transitions. [2023-08-30 07:03:27,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 682 transitions. [2023-08-30 07:03:27,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:27,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 682 transitions. [2023-08-30 07:03:27,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.4) internal successors, (682), 5 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,462 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,462 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 97 flow. Second operand 5 states and 682 transitions. [2023-08-30 07:03:27,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 82 transitions, 392 flow [2023-08-30 07:03:27,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 82 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:27,464 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 142 flow [2023-08-30 07:03:27,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-30 07:03:27,465 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-30 07:03:27,465 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 142 flow [2023-08-30 07:03:27,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:27,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:27,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 07:03:27,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:27,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1396144016, now seen corresponding path program 2 times [2023-08-30 07:03:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871171822] [2023-08-30 07:03:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:27,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:27,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871171822] [2023-08-30 07:03:27,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871171822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:27,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:27,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:03:27,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816529532] [2023-08-30 07:03:27,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:27,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:03:27,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:03:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:03:27,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-08-30 07:03:27,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:27,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-08-30 07:03:27,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:27,721 INFO L130 PetriNetUnfolder]: 1807/2576 cut-off events. [2023-08-30 07:03:27,722 INFO L131 PetriNetUnfolder]: For 3111/3434 co-relation queries the response was YES. [2023-08-30 07:03:27,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 2576 events. 1807/2576 cut-off events. For 3111/3434 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12028 event pairs, 523 based on Foata normal form. 397/2926 useless extension candidates. Maximal degree in co-relation 7762. Up to 1640 conditions per place. [2023-08-30 07:03:27,732 INFO L137 encePairwiseOnDemand]: 274/278 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-08-30 07:03:27,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 389 flow [2023-08-30 07:03:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:03:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:03:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 07:03:27,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-08-30 07:03:27,734 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 07:03:27,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 07:03:27,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:27,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 07:03:27,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,737 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 142 flow. Second operand 4 states and 550 transitions. [2023-08-30 07:03:27,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 389 flow [2023-08-30 07:03:27,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 382 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:27,739 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 168 flow [2023-08-30 07:03:27,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-08-30 07:03:27,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-08-30 07:03:27,740 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 168 flow [2023-08-30 07:03:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:27,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:27,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 07:03:27,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:27,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1002958456, now seen corresponding path program 3 times [2023-08-30 07:03:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:27,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994539661] [2023-08-30 07:03:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:27,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994539661] [2023-08-30 07:03:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994539661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:27,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:27,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:03:27,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506510392] [2023-08-30 07:03:27,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:27,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:03:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:03:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:03:27,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:27,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:27,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:27,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:27,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:28,134 INFO L130 PetriNetUnfolder]: 2101/3191 cut-off events. [2023-08-30 07:03:28,134 INFO L131 PetriNetUnfolder]: For 7172/7798 co-relation queries the response was YES. [2023-08-30 07:03:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 3191 events. 2101/3191 cut-off events. For 7172/7798 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16380 event pairs, 795 based on Foata normal form. 782/3948 useless extension candidates. Maximal degree in co-relation 9824. Up to 1821 conditions per place. [2023-08-30 07:03:28,150 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 78 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-08-30 07:03:28,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 539 flow [2023-08-30 07:03:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:03:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:03:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 674 transitions. [2023-08-30 07:03:28,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4848920863309353 [2023-08-30 07:03:28,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 674 transitions. [2023-08-30 07:03:28,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 674 transitions. [2023-08-30 07:03:28,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:28,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 674 transitions. [2023-08-30 07:03:28,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,158 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 168 flow. Second operand 5 states and 674 transitions. [2023-08-30 07:03:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 539 flow [2023-08-30 07:03:28,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 531 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:28,163 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 236 flow [2023-08-30 07:03:28,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-30 07:03:28,164 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-30 07:03:28,164 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 236 flow [2023-08-30 07:03:28,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:28,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:28,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 07:03:28,165 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:28,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1261806454, now seen corresponding path program 4 times [2023-08-30 07:03:28,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:28,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005910245] [2023-08-30 07:03:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:28,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:28,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:28,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005910245] [2023-08-30 07:03:28,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005910245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:28,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:28,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:03:28,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196305241] [2023-08-30 07:03:28,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:28,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:03:28,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:03:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:03:28,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-08-30 07:03:28,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:28,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-08-30 07:03:28,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:28,547 INFO L130 PetriNetUnfolder]: 2291/3471 cut-off events. [2023-08-30 07:03:28,547 INFO L131 PetriNetUnfolder]: For 13548/14183 co-relation queries the response was YES. [2023-08-30 07:03:28,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 3471 events. 2291/3471 cut-off events. For 13548/14183 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18061 event pairs, 795 based on Foata normal form. 652/4013 useless extension candidates. Maximal degree in co-relation 13296. Up to 1589 conditions per place. [2023-08-30 07:03:28,564 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 63 selfloop transitions, 10 changer transitions 1/81 dead transitions. [2023-08-30 07:03:28,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 621 flow [2023-08-30 07:03:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:03:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:03:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 07:03:28,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-08-30 07:03:28,566 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 07:03:28,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 07:03:28,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:28,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 07:03:28,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,569 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,570 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 236 flow. Second operand 4 states and 550 transitions. [2023-08-30 07:03:28,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 621 flow [2023-08-30 07:03:28,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 611 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:28,585 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 377 flow [2023-08-30 07:03:28,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-08-30 07:03:28,585 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-30 07:03:28,585 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 377 flow [2023-08-30 07:03:28,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:28,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:28,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 07:03:28,586 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:28,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash 631474676, now seen corresponding path program 5 times [2023-08-30 07:03:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:28,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184869377] [2023-08-30 07:03:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:28,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:28,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184869377] [2023-08-30 07:03:28,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184869377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:28,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:28,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 07:03:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290200085] [2023-08-30 07:03:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 07:03:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 07:03:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 07:03:28,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 278 [2023-08-30 07:03:28,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:28,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 278 [2023-08-30 07:03:28,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:28,949 INFO L130 PetriNetUnfolder]: 2297/3339 cut-off events. [2023-08-30 07:03:28,949 INFO L131 PetriNetUnfolder]: For 17091/17811 co-relation queries the response was YES. [2023-08-30 07:03:28,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 3339 events. 2297/3339 cut-off events. For 17091/17811 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 16169 event pairs, 647 based on Foata normal form. 725/3981 useless extension candidates. Maximal degree in co-relation 14966. Up to 1928 conditions per place. [2023-08-30 07:03:28,966 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 61 selfloop transitions, 7 changer transitions 10/83 dead transitions. [2023-08-30 07:03:28,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 693 flow [2023-08-30 07:03:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 07:03:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 07:03:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-30 07:03:28,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49460431654676257 [2023-08-30 07:03:28,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-30 07:03:28,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-30 07:03:28,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:28,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-30 07:03:28,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 278.0) internal successors, (1390), 5 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,970 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 377 flow. Second operand 4 states and 550 transitions. [2023-08-30 07:03:28,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 693 flow [2023-08-30 07:03:28,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 654 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:28,979 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 368 flow [2023-08-30 07:03:28,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-30 07:03:28,979 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-30 07:03:28,980 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 368 flow [2023-08-30 07:03:28,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:28,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:28,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 07:03:28,980 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:28,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 456940982, now seen corresponding path program 1 times [2023-08-30 07:03:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:28,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402438378] [2023-08-30 07:03:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:03:29,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:29,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402438378] [2023-08-30 07:03:29,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402438378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:29,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:29,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:03:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492547718] [2023-08-30 07:03:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:29,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:03:29,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:03:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:03:29,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:29,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:29,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:29,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:29,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:29,455 INFO L130 PetriNetUnfolder]: 3037/4299 cut-off events. [2023-08-30 07:03:29,455 INFO L131 PetriNetUnfolder]: For 31811/32782 co-relation queries the response was YES. [2023-08-30 07:03:29,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18865 conditions, 4299 events. 3037/4299 cut-off events. For 31811/32782 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21100 event pairs, 1125 based on Foata normal form. 1145/5353 useless extension candidates. Maximal degree in co-relation 18848. Up to 3011 conditions per place. [2023-08-30 07:03:29,477 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 79 selfloop transitions, 7 changer transitions 12/101 dead transitions. [2023-08-30 07:03:29,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 872 flow [2023-08-30 07:03:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:03:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:03:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-30 07:03:29,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841726618705036 [2023-08-30 07:03:29,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-30 07:03:29,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-30 07:03:29,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:29,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-30 07:03:29,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:29,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:29,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:29,483 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 368 flow. Second operand 5 states and 673 transitions. [2023-08-30 07:03:29,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 872 flow [2023-08-30 07:03:29,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 101 transitions, 830 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 07:03:29,493 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 427 flow [2023-08-30 07:03:29,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2023-08-30 07:03:29,494 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2023-08-30 07:03:29,494 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 427 flow [2023-08-30 07:03:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:29,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:29,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 07:03:29,495 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:29,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1078285420, now seen corresponding path program 1 times [2023-08-30 07:03:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160710819] [2023-08-30 07:03:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:29,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160710819] [2023-08-30 07:03:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160710819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:03:29,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982594619] [2023-08-30 07:03:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:29,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:29,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:03:29,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 07:03:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:03:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:29,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982594619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:29,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:03:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-30 07:03:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573413766] [2023-08-30 07:03:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:29,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 07:03:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 07:03:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 07:03:29,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-08-30 07:03:29,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 427 flow. Second operand has 11 states, 11 states have (on average 120.0) internal successors, (1320), 11 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:29,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:29,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-08-30 07:03:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:30,758 INFO L130 PetriNetUnfolder]: 5106/6928 cut-off events. [2023-08-30 07:03:30,758 INFO L131 PetriNetUnfolder]: For 51387/51980 co-relation queries the response was YES. [2023-08-30 07:03:30,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36586 conditions, 6928 events. 5106/6928 cut-off events. For 51387/51980 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31389 event pairs, 1032 based on Foata normal form. 1120/8038 useless extension candidates. Maximal degree in co-relation 36568. Up to 3307 conditions per place. [2023-08-30 07:03:30,793 INFO L137 encePairwiseOnDemand]: 269/278 looper letters, 143 selfloop transitions, 37 changer transitions 14/196 dead transitions. [2023-08-30 07:03:30,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 196 transitions, 1934 flow [2023-08-30 07:03:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 07:03:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 07:03:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1421 transitions. [2023-08-30 07:03:30,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646827992151733 [2023-08-30 07:03:30,796 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1421 transitions. [2023-08-30 07:03:30,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1421 transitions. [2023-08-30 07:03:30,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:30,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1421 transitions. [2023-08-30 07:03:30,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 129.1818181818182) internal successors, (1421), 11 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:30,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 278.0) internal successors, (3336), 12 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:30,803 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 278.0) internal successors, (3336), 12 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:30,803 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 427 flow. Second operand 11 states and 1421 transitions. [2023-08-30 07:03:30,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 196 transitions, 1934 flow [2023-08-30 07:03:30,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 196 transitions, 1787 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-08-30 07:03:30,825 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 820 flow [2023-08-30 07:03:30,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-08-30 07:03:30,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2023-08-30 07:03:30,826 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 820 flow [2023-08-30 07:03:30,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 120.0) internal successors, (1320), 11 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:30,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:30,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:30,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 07:03:31,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 07:03:31,032 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:31,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash -829438692, now seen corresponding path program 2 times [2023-08-30 07:03:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893659542] [2023-08-30 07:03:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:03:31,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:31,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893659542] [2023-08-30 07:03:31,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893659542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:31,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:31,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:03:31,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659955212] [2023-08-30 07:03:31,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:31,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:03:31,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:03:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:03:31,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-08-30 07:03:31,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 820 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:31,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:31,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-08-30 07:03:31,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:31,736 INFO L130 PetriNetUnfolder]: 4711/6351 cut-off events. [2023-08-30 07:03:31,736 INFO L131 PetriNetUnfolder]: For 66535/67770 co-relation queries the response was YES. [2023-08-30 07:03:31,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37627 conditions, 6351 events. 4711/6351 cut-off events. For 66535/67770 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28627 event pairs, 1915 based on Foata normal form. 1033/7221 useless extension candidates. Maximal degree in co-relation 37604. Up to 5558 conditions per place. [2023-08-30 07:03:31,788 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 78 selfloop transitions, 17 changer transitions 7/108 dead transitions. [2023-08-30 07:03:31,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 1329 flow [2023-08-30 07:03:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:03:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:03:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-08-30 07:03:31,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46690647482014386 [2023-08-30 07:03:31,790 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-08-30 07:03:31,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-08-30 07:03:31,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:31,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-08-30 07:03:31,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:31,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:31,793 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:31,793 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 820 flow. Second operand 5 states and 649 transitions. [2023-08-30 07:03:31,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 1329 flow [2023-08-30 07:03:31,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 1150 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-30 07:03:31,829 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 780 flow [2023-08-30 07:03:31,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=780, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-30 07:03:31,830 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2023-08-30 07:03:31,830 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 780 flow [2023-08-30 07:03:31,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:31,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:31,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:31,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 07:03:31,831 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:31,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1491670694, now seen corresponding path program 3 times [2023-08-30 07:03:31,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:31,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399761658] [2023-08-30 07:03:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:31,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:03:31,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:31,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399761658] [2023-08-30 07:03:31,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399761658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 07:03:31,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 07:03:31,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 07:03:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461794578] [2023-08-30 07:03:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 07:03:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 07:03:31,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 07:03:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 07:03:31,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 278 [2023-08-30 07:03:31,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 780 flow. Second operand has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:31,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:31,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 278 [2023-08-30 07:03:31,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:32,361 INFO L130 PetriNetUnfolder]: 4234/5660 cut-off events. [2023-08-30 07:03:32,362 INFO L131 PetriNetUnfolder]: For 48413/49431 co-relation queries the response was YES. [2023-08-30 07:03:32,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32009 conditions, 5660 events. 4234/5660 cut-off events. For 48413/49431 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 24820 event pairs, 1362 based on Foata normal form. 907/6442 useless extension candidates. Maximal degree in co-relation 31987. Up to 4090 conditions per place. [2023-08-30 07:03:32,393 INFO L137 encePairwiseOnDemand]: 273/278 looper letters, 74 selfloop transitions, 18 changer transitions 11/109 dead transitions. [2023-08-30 07:03:32,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 1196 flow [2023-08-30 07:03:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 07:03:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 07:03:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2023-08-30 07:03:32,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47050359712230216 [2023-08-30 07:03:32,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2023-08-30 07:03:32,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2023-08-30 07:03:32,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:32,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2023-08-30 07:03:32,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:32,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:32,397 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:32,397 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 780 flow. Second operand 5 states and 654 transitions. [2023-08-30 07:03:32,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 1196 flow [2023-08-30 07:03:32,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 1169 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 07:03:32,427 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 820 flow [2023-08-30 07:03:32,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=820, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2023-08-30 07:03:32,427 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2023-08-30 07:03:32,427 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 820 flow [2023-08-30 07:03:32,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:32,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:32,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 07:03:32,428 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:32,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash 756304230, now seen corresponding path program 1 times [2023-08-30 07:03:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:32,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216032849] [2023-08-30 07:03:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:32,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216032849] [2023-08-30 07:03:32,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216032849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:03:32,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017395421] [2023-08-30 07:03:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:32,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:32,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:32,514 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:03:32,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 07:03:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:03:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:32,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:32,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017395421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:32,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:03:32,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-30 07:03:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592059877] [2023-08-30 07:03:32,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:32,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 07:03:32,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 07:03:32,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 07:03:32,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-08-30 07:03:32,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 820 flow. Second operand has 7 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:32,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:32,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-08-30 07:03:32,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:33,655 INFO L130 PetriNetUnfolder]: 5872/7758 cut-off events. [2023-08-30 07:03:33,656 INFO L131 PetriNetUnfolder]: For 72013/72996 co-relation queries the response was YES. [2023-08-30 07:03:33,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45975 conditions, 7758 events. 5872/7758 cut-off events. For 72013/72996 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33772 event pairs, 1414 based on Foata normal form. 1008/8716 useless extension candidates. Maximal degree in co-relation 45950. Up to 4590 conditions per place. [2023-08-30 07:03:33,726 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 146 selfloop transitions, 66 changer transitions 3/221 dead transitions. [2023-08-30 07:03:33,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 221 transitions, 2703 flow [2023-08-30 07:03:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 07:03:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 07:03:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2023-08-30 07:03:33,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743705035971223 [2023-08-30 07:03:33,730 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2023-08-30 07:03:33,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2023-08-30 07:03:33,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:33,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2023-08-30 07:03:33,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:33,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 278.0) internal successors, (2502), 9 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:33,738 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 278.0) internal successors, (2502), 9 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:33,738 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 820 flow. Second operand 8 states and 1055 transitions. [2023-08-30 07:03:33,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 221 transitions, 2703 flow [2023-08-30 07:03:33,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 221 transitions, 2589 flow, removed 25 selfloop flow, removed 4 redundant places. [2023-08-30 07:03:33,826 INFO L231 Difference]: Finished difference. Result has 87 places, 126 transitions, 1630 flow [2023-08-30 07:03:33,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1630, PETRI_PLACES=87, PETRI_TRANSITIONS=126} [2023-08-30 07:03:33,827 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2023-08-30 07:03:33,827 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 126 transitions, 1630 flow [2023-08-30 07:03:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.85714285714286) internal successors, (874), 7 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:33,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:33,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:33,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 07:03:34,032 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,SelfDestructingSolverStorable19 [2023-08-30 07:03:34,032 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:34,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash 661390484, now seen corresponding path program 2 times [2023-08-30 07:03:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48287036] [2023-08-30 07:03:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:34,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:34,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48287036] [2023-08-30 07:03:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48287036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:03:34,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970369662] [2023-08-30 07:03:34,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:03:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:34,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:03:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 07:03:34,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:03:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:03:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 07:03:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:34,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 07:03:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970369662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:34,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:03:34,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 07:03:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81466666] [2023-08-30 07:03:34,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:34,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 07:03:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:34,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 07:03:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 07:03:34,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 278 [2023-08-30 07:03:34,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 126 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:34,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:34,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 278 [2023-08-30 07:03:34,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:35,147 INFO L130 PetriNetUnfolder]: 6144/8011 cut-off events. [2023-08-30 07:03:35,148 INFO L131 PetriNetUnfolder]: For 91022/91991 co-relation queries the response was YES. [2023-08-30 07:03:35,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51944 conditions, 8011 events. 6144/8011 cut-off events. For 91022/91991 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 33998 event pairs, 1128 based on Foata normal form. 1034/9022 useless extension candidates. Maximal degree in co-relation 51917. Up to 4791 conditions per place. [2023-08-30 07:03:35,196 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 106 selfloop transitions, 97 changer transitions 2/211 dead transitions. [2023-08-30 07:03:35,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 211 transitions, 3002 flow [2023-08-30 07:03:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:03:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:03:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2023-08-30 07:03:35,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47302158273381295 [2023-08-30 07:03:35,199 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2023-08-30 07:03:35,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2023-08-30 07:03:35,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:35,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2023-08-30 07:03:35,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:35,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:35,202 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:35,202 INFO L175 Difference]: Start difference. First operand has 87 places, 126 transitions, 1630 flow. Second operand 6 states and 789 transitions. [2023-08-30 07:03:35,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 211 transitions, 3002 flow [2023-08-30 07:03:35,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 211 transitions, 2974 flow, removed 14 selfloop flow, removed 0 redundant places. [2023-08-30 07:03:35,300 INFO L231 Difference]: Finished difference. Result has 95 places, 165 transitions, 2522 flow [2023-08-30 07:03:35,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2522, PETRI_PLACES=95, PETRI_TRANSITIONS=165} [2023-08-30 07:03:35,301 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2023-08-30 07:03:35,301 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 165 transitions, 2522 flow [2023-08-30 07:03:35,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.375) internal successors, (987), 8 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:35,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:35,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:35,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 07:03:35,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:35,507 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:35,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -261321058, now seen corresponding path program 1 times [2023-08-30 07:03:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:35,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137112653] [2023-08-30 07:03:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:35,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137112653] [2023-08-30 07:03:35,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137112653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:03:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919097048] [2023-08-30 07:03:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:35,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:35,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:35,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:03:35,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 07:03:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 07:03:35,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:35,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:35,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919097048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:35,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:03:35,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-08-30 07:03:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938470393] [2023-08-30 07:03:35,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:35,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:03:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:03:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:03:36,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 278 [2023-08-30 07:03:36,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 165 transitions, 2522 flow. Second operand has 12 states, 12 states have (on average 121.83333333333333) internal successors, (1462), 12 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:36,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:36,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 278 [2023-08-30 07:03:36,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:37,734 INFO L130 PetriNetUnfolder]: 12474/16661 cut-off events. [2023-08-30 07:03:37,734 INFO L131 PetriNetUnfolder]: For 245920/249917 co-relation queries the response was YES. [2023-08-30 07:03:37,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116865 conditions, 16661 events. 12474/16661 cut-off events. For 245920/249917 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 84355 event pairs, 1184 based on Foata normal form. 3518/19527 useless extension candidates. Maximal degree in co-relation 116834. Up to 9573 conditions per place. [2023-08-30 07:03:37,851 INFO L137 encePairwiseOnDemand]: 271/278 looper letters, 180 selfloop transitions, 179 changer transitions 3/373 dead transitions. [2023-08-30 07:03:37,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 373 transitions, 5972 flow [2023-08-30 07:03:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 07:03:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 07:03:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2023-08-30 07:03:37,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862110311750599 [2023-08-30 07:03:37,853 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2023-08-30 07:03:37,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2023-08-30 07:03:37,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:37,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2023-08-30 07:03:37,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:37,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:37,857 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 278.0) internal successors, (1946), 7 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:37,857 INFO L175 Difference]: Start difference. First operand has 95 places, 165 transitions, 2522 flow. Second operand 6 states and 811 transitions. [2023-08-30 07:03:37,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 373 transitions, 5972 flow [2023-08-30 07:03:38,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 373 transitions, 5373 flow, removed 198 selfloop flow, removed 4 redundant places. [2023-08-30 07:03:38,030 INFO L231 Difference]: Finished difference. Result has 99 places, 305 transitions, 5241 flow [2023-08-30 07:03:38,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5241, PETRI_PLACES=99, PETRI_TRANSITIONS=305} [2023-08-30 07:03:38,031 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2023-08-30 07:03:38,031 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 305 transitions, 5241 flow [2023-08-30 07:03:38,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.83333333333333) internal successors, (1462), 12 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:38,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:38,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:38,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 07:03:38,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:38,236 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:38,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1861405730, now seen corresponding path program 2 times [2023-08-30 07:03:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:38,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950656574] [2023-08-30 07:03:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:38,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:38,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950656574] [2023-08-30 07:03:38,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950656574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:03:38,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331170982] [2023-08-30 07:03:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 07:03:38,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:38,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:03:38,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 07:03:38,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:03:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:03:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 07:03:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:38,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:03:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331170982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:38,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:03:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2023-08-30 07:03:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505592491] [2023-08-30 07:03:38,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 07:03:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 07:03:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-30 07:03:38,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 278 [2023-08-30 07:03:38,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 305 transitions, 5241 flow. Second operand has 17 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:38,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:38,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 278 [2023-08-30 07:03:38,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:03:45,795 INFO L130 PetriNetUnfolder]: 31868/43369 cut-off events. [2023-08-30 07:03:45,795 INFO L131 PetriNetUnfolder]: For 680915/688871 co-relation queries the response was YES. [2023-08-30 07:03:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313847 conditions, 43369 events. 31868/43369 cut-off events. For 680915/688871 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 257993 event pairs, 1801 based on Foata normal form. 6442/49280 useless extension candidates. Maximal degree in co-relation 313814. Up to 22929 conditions per place. [2023-08-30 07:03:46,250 INFO L137 encePairwiseOnDemand]: 268/278 looper letters, 334 selfloop transitions, 769 changer transitions 6/1118 dead transitions. [2023-08-30 07:03:46,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1118 transitions, 18698 flow [2023-08-30 07:03:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-30 07:03:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-30 07:03:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2732 transitions. [2023-08-30 07:03:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679684823569716 [2023-08-30 07:03:46,275 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2732 transitions. [2023-08-30 07:03:46,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2732 transitions. [2023-08-30 07:03:46,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:03:46,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2732 transitions. [2023-08-30 07:03:46,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:46,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 278.0) internal successors, (6116), 22 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:46,301 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 278.0) internal successors, (6116), 22 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:46,301 INFO L175 Difference]: Start difference. First operand has 99 places, 305 transitions, 5241 flow. Second operand 21 states and 2732 transitions. [2023-08-30 07:03:46,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 1118 transitions, 18698 flow [2023-08-30 07:03:47,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 1118 transitions, 17932 flow, removed 383 selfloop flow, removed 0 redundant places. [2023-08-30 07:03:47,473 INFO L231 Difference]: Finished difference. Result has 125 places, 893 transitions, 17296 flow [2023-08-30 07:03:47,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=4839, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=17296, PETRI_PLACES=125, PETRI_TRANSITIONS=893} [2023-08-30 07:03:47,473 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2023-08-30 07:03:47,473 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 893 transitions, 17296 flow [2023-08-30 07:03:47,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 117.70588235294117) internal successors, (2001), 17 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:47,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:03:47,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:03:47,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 07:03:47,679 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,SelfDestructingSolverStorable22 [2023-08-30 07:03:47,680 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:03:47,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:03:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1379169044, now seen corresponding path program 3 times [2023-08-30 07:03:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:03:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711776776] [2023-08-30 07:03:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:03:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:03:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:03:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:03:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:03:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711776776] [2023-08-30 07:03:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711776776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:03:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248846744] [2023-08-30 07:03:47,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 07:03:47,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:03:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:03:47,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:03:47,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 07:03:47,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 07:03:47,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:03:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:03:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:03:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:03:48,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:03:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:03:48,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248846744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:03:48,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:03:48,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-30 07:03:48,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506644380] [2023-08-30 07:03:48,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:03:48,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 07:03:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:03:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 07:03:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 07:03:48,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 278 [2023-08-30 07:03:48,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 893 transitions, 17296 flow. Second operand has 12 states, 12 states have (on average 124.5) internal successors, (1494), 12 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:03:48,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:03:48,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 278 [2023-08-30 07:03:48,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:04:00,820 INFO L130 PetriNetUnfolder]: 45529/63213 cut-off events. [2023-08-30 07:04:00,820 INFO L131 PetriNetUnfolder]: For 1292498/1299909 co-relation queries the response was YES. [2023-08-30 07:04:01,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481827 conditions, 63213 events. 45529/63213 cut-off events. For 1292498/1299909 co-relation queries the response was YES. Maximal size of possible extension queue 2774. Compared 414919 event pairs, 5762 based on Foata normal form. 7252/70031 useless extension candidates. Maximal degree in co-relation 481787. Up to 26483 conditions per place. [2023-08-30 07:04:01,624 INFO L137 encePairwiseOnDemand]: 272/278 looper letters, 1478 selfloop transitions, 525 changer transitions 287/2298 dead transitions. [2023-08-30 07:04:01,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 2298 transitions, 46870 flow [2023-08-30 07:04:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 07:04:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 07:04:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1619 transitions. [2023-08-30 07:04:01,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48531175059952036 [2023-08-30 07:04:01,627 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1619 transitions. [2023-08-30 07:04:01,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1619 transitions. [2023-08-30 07:04:01,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:04:01,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1619 transitions. [2023-08-30 07:04:01,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.91666666666666) internal successors, (1619), 12 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:01,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 278.0) internal successors, (3614), 13 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:01,631 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 278.0) internal successors, (3614), 13 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:01,631 INFO L175 Difference]: Start difference. First operand has 125 places, 893 transitions, 17296 flow. Second operand 12 states and 1619 transitions. [2023-08-30 07:04:01,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 2298 transitions, 46870 flow [2023-08-30 07:04:12,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 2298 transitions, 38513 flow, removed 4139 selfloop flow, removed 1 redundant places. [2023-08-30 07:04:12,296 INFO L231 Difference]: Finished difference. Result has 141 places, 1145 transitions, 20108 flow [2023-08-30 07:04:12,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=13798, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20108, PETRI_PLACES=141, PETRI_TRANSITIONS=1145} [2023-08-30 07:04:12,297 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2023-08-30 07:04:12,297 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 1145 transitions, 20108 flow [2023-08-30 07:04:12,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 124.5) internal successors, (1494), 12 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:12,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:04:12,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:04:12,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 07:04:12,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:04:12,503 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:04:12,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:04:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash 377423300, now seen corresponding path program 4 times [2023-08-30 07:04:12,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:04:12,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524644788] [2023-08-30 07:04:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:04:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:04:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:04:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:04:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:04:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524644788] [2023-08-30 07:04:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524644788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:04:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531548395] [2023-08-30 07:04:12,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 07:04:12,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:04:12,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:04:12,668 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:04:12,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 07:04:12,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 07:04:12,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:04:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:04:12,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:04:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:04:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:04:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:04:12,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531548395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:04:12,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:04:12,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-30 07:04:12,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616289246] [2023-08-30 07:04:12,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:04:12,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 07:04:12,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:04:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 07:04:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-30 07:04:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-08-30 07:04:13,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 1145 transitions, 20108 flow. Second operand has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:13,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:04:13,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-08-30 07:04:13,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:04:43,841 INFO L130 PetriNetUnfolder]: 93996/129885 cut-off events. [2023-08-30 07:04:43,841 INFO L131 PetriNetUnfolder]: For 2238021/2244344 co-relation queries the response was YES. [2023-08-30 07:04:45,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954958 conditions, 129885 events. 93996/129885 cut-off events. For 2238021/2244344 co-relation queries the response was YES. Maximal size of possible extension queue 4649. Compared 889580 event pairs, 11677 based on Foata normal form. 15584/145018 useless extension candidates. Maximal degree in co-relation 954912. Up to 44303 conditions per place. [2023-08-30 07:04:45,636 INFO L137 encePairwiseOnDemand]: 268/278 looper letters, 2437 selfloop transitions, 1455 changer transitions 20/3917 dead transitions. [2023-08-30 07:04:45,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 3917 transitions, 71949 flow [2023-08-30 07:04:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 07:04:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 07:04:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5323 transitions. [2023-08-30 07:04:45,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46701175644849974 [2023-08-30 07:04:45,654 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5323 transitions. [2023-08-30 07:04:45,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5323 transitions. [2023-08-30 07:04:45,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:04:45,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5323 transitions. [2023-08-30 07:04:45,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 129.82926829268294) internal successors, (5323), 41 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:45,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 278.0) internal successors, (11676), 42 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:45,669 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 278.0) internal successors, (11676), 42 states have internal predecessors, (11676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:04:45,669 INFO L175 Difference]: Start difference. First operand has 141 places, 1145 transitions, 20108 flow. Second operand 41 states and 5323 transitions. [2023-08-30 07:04:45,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 3917 transitions, 71949 flow [2023-08-30 07:05:18,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 3917 transitions, 70991 flow, removed 479 selfloop flow, removed 2 redundant places. [2023-08-30 07:05:18,360 INFO L231 Difference]: Finished difference. Result has 208 places, 2413 transitions, 50679 flow [2023-08-30 07:05:18,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=19712, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=50679, PETRI_PLACES=208, PETRI_TRANSITIONS=2413} [2023-08-30 07:05:18,361 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 153 predicate places. [2023-08-30 07:05:18,362 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 2413 transitions, 50679 flow [2023-08-30 07:05:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:05:18,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:05:18,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:05:18,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 07:05:18,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:05:18,580 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:05:18,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:05:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1856691398, now seen corresponding path program 5 times [2023-08-30 07:05:18,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:05:18,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169902530] [2023-08-30 07:05:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:05:18,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:05:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:05:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:05:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:05:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169902530] [2023-08-30 07:05:18,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169902530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:05:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010058076] [2023-08-30 07:05:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 07:05:18,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:05:18,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:05:18,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:05:18,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 07:05:18,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 07:05:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:05:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 07:05:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:05:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:05:18,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:05:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:05:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010058076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:05:18,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:05:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2023-08-30 07:05:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301062978] [2023-08-30 07:05:18,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:05:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 07:05:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:05:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 07:05:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-08-30 07:05:19,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 278 [2023-08-30 07:05:19,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 2413 transitions, 50679 flow. Second operand has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:05:19,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:05:19,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 278 [2023-08-30 07:05:19,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 07:06:46,974 INFO L130 PetriNetUnfolder]: 162180/227131 cut-off events. [2023-08-30 07:06:46,975 INFO L131 PetriNetUnfolder]: For 8958016/8962551 co-relation queries the response was YES. [2023-08-30 07:06:50,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193226 conditions, 227131 events. 162180/227131 cut-off events. For 8958016/8962551 co-relation queries the response was YES. Maximal size of possible extension queue 8225. Compared 1706733 event pairs, 17864 based on Foata normal form. 5857/232934 useless extension candidates. Maximal degree in co-relation 2193150. Up to 71568 conditions per place. [2023-08-30 07:06:52,421 INFO L137 encePairwiseOnDemand]: 270/278 looper letters, 4716 selfloop transitions, 1304 changer transitions 13/6049 dead transitions. [2023-08-30 07:06:52,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 6049 transitions, 139842 flow [2023-08-30 07:06:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 07:06:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 07:06:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1961 transitions. [2023-08-30 07:06:52,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702637889688249 [2023-08-30 07:06:52,423 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1961 transitions. [2023-08-30 07:06:52,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1961 transitions. [2023-08-30 07:06:52,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 07:06:52,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1961 transitions. [2023-08-30 07:06:52,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 130.73333333333332) internal successors, (1961), 15 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:06:52,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 278.0) internal successors, (4448), 16 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:06:52,429 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 278.0) internal successors, (4448), 16 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:06:52,429 INFO L175 Difference]: Start difference. First operand has 208 places, 2413 transitions, 50679 flow. Second operand 15 states and 1961 transitions. [2023-08-30 07:06:52,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 6049 transitions, 139842 flow [2023-08-30 07:12:59,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 6049 transitions, 122535 flow, removed 8419 selfloop flow, removed 1 redundant places. [2023-08-30 07:12:59,455 INFO L231 Difference]: Finished difference. Result has 232 places, 3118 transitions, 63947 flow [2023-08-30 07:12:59,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=44945, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=63947, PETRI_PLACES=232, PETRI_TRANSITIONS=3118} [2023-08-30 07:12:59,457 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2023-08-30 07:12:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 3118 transitions, 63947 flow [2023-08-30 07:12:59,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:12:59,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 07:12:59,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 07:12:59,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 07:12:59,661 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,SelfDestructingSolverStorable25 [2023-08-30 07:12:59,662 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-30 07:12:59,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 07:12:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1468718194, now seen corresponding path program 6 times [2023-08-30 07:12:59,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 07:12:59,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041438307] [2023-08-30 07:12:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 07:12:59,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 07:12:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 07:12:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 07:12:59,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 07:12:59,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041438307] [2023-08-30 07:12:59,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041438307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 07:12:59,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579925318] [2023-08-30 07:12:59,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 07:12:59,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 07:12:59,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 07:12:59,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 07:12:59,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 07:12:59,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-30 07:12:59,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 07:12:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 07:12:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 07:13:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:13:00,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 07:13:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 07:13:00,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579925318] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 07:13:00,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 07:13:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-30 07:13:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744083947] [2023-08-30 07:13:00,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 07:13:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 07:13:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 07:13:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 07:13:00,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-08-30 07:13:00,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 278 [2023-08-30 07:13:00,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 3118 transitions, 63947 flow. Second operand has 17 states, 17 states have (on average 116.23529411764706) internal successors, (1976), 17 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 07:13:00,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 07:13:00,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 278 [2023-08-30 07:13:00,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand