./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i --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/pthread-wmm/safe016_power.opt.i -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 6b69d29db6700923687b32c5d8fab6e8f05fe2198d87348098263d957793e472 --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 03:10:47,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 03:10:47,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 03:10:47,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 03:10:47,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 03:10:47,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 03:10:47,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 03:10:47,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 03:10:47,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 03:10:47,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 03:10:47,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 03:10:47,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 03:10:47,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 03:10:47,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 03:10:47,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 03:10:47,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 03:10:47,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 03:10:47,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 03:10:47,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 03:10:47,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 03:10:47,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 03:10:47,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 03:10:47,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 03:10:47,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 03:10:47,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 03:10:47,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 03:10:47,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 03:10:47,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 03:10:47,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 03:10:47,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 03:10:47,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 03:10:47,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 03:10:47,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 03:10:47,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 03:10:47,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 03:10:47,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 03:10:47,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 03:10:47,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 03:10:47,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 03:10:47,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 03:10:47,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 03:10:47,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 03:10:48,008 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 03:10:48,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 03:10:48,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 03:10:48,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 03:10:48,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 03:10:48,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 03:10:48,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 03:10:48,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 03:10:48,011 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 03:10:48,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 03:10:48,011 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 03:10:48,012 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 03:10:48,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 03:10:48,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 03:10:48,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 03:10:48,012 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 03:10:48,012 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 03:10:48,013 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 03:10:48,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 03:10:48,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 03:10:48,013 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 03:10:48,013 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 03:10:48,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 03:10:48,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 03:10:48,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 03:10:48,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:10:48,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 03:10:48,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 03:10:48,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 03:10:48,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 03:10:48,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 03:10:48,015 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 03:10:48,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 03:10:48,015 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 03:10:48,015 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b69d29db6700923687b32c5d8fab6e8f05fe2198d87348098263d957793e472 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 03:10:48,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 03:10:48,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 03:10:48,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 03:10:48,254 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 03:10:48,255 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 03:10:48,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2023-08-30 03:10:49,249 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 03:10:49,466 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 03:10:49,467 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i [2023-08-30 03:10:49,482 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2770d34/a01c7a1008fc416bbc007cb560c27667/FLAG14c269aa7 [2023-08-30 03:10:49,491 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2770d34/a01c7a1008fc416bbc007cb560c27667 [2023-08-30 03:10:49,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 03:10:49,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 03:10:49,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 03:10:49,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 03:10:49,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 03:10:49,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:49,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7473d0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49, skipping insertion in model container [2023-08-30 03:10:49,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:49,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 03:10:49,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 03:10:49,690 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i[951,964] [2023-08-30 03:10:49,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:10:49,889 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 03:10:49,899 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.opt.i[951,964] [2023-08-30 03:10:49,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 03:10:49,971 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 03:10:49,972 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 03:10:49,976 INFO L208 MainTranslator]: Completed translation [2023-08-30 03:10:49,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49 WrapperNode [2023-08-30 03:10:49,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 03:10:49,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 03:10:49,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 03:10:49,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 03:10:49,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,031 INFO L138 Inliner]: procedures = 177, calls = 91, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 184 [2023-08-30 03:10:50,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 03:10:50,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 03:10:50,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 03:10:50,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 03:10:50,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 03:10:50,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 03:10:50,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 03:10:50,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 03:10:50,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (1/1) ... [2023-08-30 03:10:50,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 03:10:50,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 03:10:50,108 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 03:10:50,113 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 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 03:10:50,134 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-30 03:10:50,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-30 03:10:50,135 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-30 03:10:50,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-30 03:10:50,135 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-30 03:10:50,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-30 03:10:50,135 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-30 03:10:50,135 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-30 03:10:50,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 03:10:50,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 03:10:50,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 03:10:50,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 03:10:50,137 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 03:10:50,320 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 03:10:50,322 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 03:10:50,830 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 03:10:51,458 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 03:10:51,458 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 03:10:51,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:10:51 BoogieIcfgContainer [2023-08-30 03:10:51,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 03:10:51,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 03:10:51,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 03:10:51,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 03:10:51,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 03:10:49" (1/3) ... [2023-08-30 03:10:51,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bacd2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:10:51, skipping insertion in model container [2023-08-30 03:10:51,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 03:10:49" (2/3) ... [2023-08-30 03:10:51,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bacd2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 03:10:51, skipping insertion in model container [2023-08-30 03:10:51,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 03:10:51" (3/3) ... [2023-08-30 03:10:51,467 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_power.opt.i [2023-08-30 03:10:51,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 03:10:51,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-08-30 03:10:51,479 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 03:10:51,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 03:10:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 210 transitions, 440 flow [2023-08-30 03:10:51,718 INFO L130 PetriNetUnfolder]: 2/206 cut-off events. [2023-08-30 03:10:51,718 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:10:51,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 2/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 373 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-08-30 03:10:51,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 210 transitions, 440 flow [2023-08-30 03:10:51,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 206 transitions, 424 flow [2023-08-30 03:10:51,729 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 03:10:51,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 206 transitions, 424 flow [2023-08-30 03:10:51,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 206 transitions, 424 flow [2023-08-30 03:10:51,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 206 transitions, 424 flow [2023-08-30 03:10:51,772 INFO L130 PetriNetUnfolder]: 2/206 cut-off events. [2023-08-30 03:10:51,773 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:10:51,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 2/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 374 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2023-08-30 03:10:51,778 INFO L119 LiptonReduction]: Number of co-enabled transitions 10770 [2023-08-30 03:11:12,416 INFO L134 LiptonReduction]: Checked pairs total: 69169 [2023-08-30 03:11:12,416 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-30 03:11:12,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 03:11:12,436 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;@1ae492aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 03:11:12,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-08-30 03:11:12,438 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 03:11:12,438 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:11:12,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:11:12,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 03:11:12,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:11:12,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:11:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1425, now seen corresponding path program 1 times [2023-08-30 03:11:12,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:11:12,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398872896] [2023-08-30 03:11:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:11:12,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:11:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:11:12,540 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 03:11:12,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:11:12,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398872896] [2023-08-30 03:11:12,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398872896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:11:12,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:11:12,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 03:11:12,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686672856] [2023-08-30 03:11:12,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:11:12,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 03:11:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:11:12,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 03:11:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 03:11:12,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 366 [2023-08-30 03:11:12,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 98 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:11:12,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:11:12,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 366 [2023-08-30 03:11:12,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:12:11,564 INFO L130 PetriNetUnfolder]: 407288/525156 cut-off events. [2023-08-30 03:12:11,565 INFO L131 PetriNetUnfolder]: For 809/809 co-relation queries the response was YES. [2023-08-30 03:12:12,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051293 conditions, 525156 events. 407288/525156 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 30988. Compared 3842207 event pairs, 407288 based on Foata normal form. 0/204637 useless extension candidates. Maximal degree in co-relation 1051281. Up to 524354 conditions per place. [2023-08-30 03:12:14,859 INFO L137 encePairwiseOnDemand]: 333/366 looper letters, 59 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2023-08-30 03:12:14,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 64 transitions, 258 flow [2023-08-30 03:12:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 03:12:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 03:12:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 384 transitions. [2023-08-30 03:12:14,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5245901639344263 [2023-08-30 03:12:14,869 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 384 transitions. [2023-08-30 03:12:14,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 384 transitions. [2023-08-30 03:12:14,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:12:14,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 384 transitions. [2023-08-30 03:12:14,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:14,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:14,880 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:14,881 INFO L175 Difference]: Start difference. First operand has 110 places, 98 transitions, 208 flow. Second operand 2 states and 384 transitions. [2023-08-30 03:12:14,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 64 transitions, 258 flow [2023-08-30 03:12:14,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 03:12:14,993 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 136 flow [2023-08-30 03:12:14,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=136, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-08-30 03:12:14,996 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -36 predicate places. [2023-08-30 03:12:14,996 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 136 flow [2023-08-30 03:12:14,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:14,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:12:14,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:12:14,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 03:12:14,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:12:14,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:12:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 43708786, now seen corresponding path program 1 times [2023-08-30 03:12:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:12:14,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020475234] [2023-08-30 03:12:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:12:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:12:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:12:15,180 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 03:12:15,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:12:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020475234] [2023-08-30 03:12:15,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020475234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:12:15,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:12:15,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:12:15,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301630041] [2023-08-30 03:12:15,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:12:15,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:12:15,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:12:15,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:12:15,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:12:15,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 366 [2023-08-30 03:12:15,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:15,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:12:15,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 366 [2023-08-30 03:12:15,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:12:39,366 INFO L130 PetriNetUnfolder]: 182467/237136 cut-off events. [2023-08-30 03:12:39,367 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 03:12:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474665 conditions, 237136 events. 182467/237136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12886. Compared 1624083 event pairs, 96767 based on Foata normal form. 3062/117488 useless extension candidates. Maximal degree in co-relation 474662. Up to 158865 conditions per place. [2023-08-30 03:12:40,507 INFO L137 encePairwiseOnDemand]: 350/366 looper letters, 77 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-30 03:12:40,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 332 flow [2023-08-30 03:12:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:12:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:12:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2023-08-30 03:12:40,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672131147540984 [2023-08-30 03:12:40,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2023-08-30 03:12:40,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2023-08-30 03:12:40,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:12:40,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2023-08-30 03:12:40,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:40,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:40,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:40,515 INFO L175 Difference]: Start difference. First operand has 74 places, 64 transitions, 136 flow. Second operand 3 states and 513 transitions. [2023-08-30 03:12:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 332 flow [2023-08-30 03:12:40,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:12:40,516 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 158 flow [2023-08-30 03:12:40,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2023-08-30 03:12:40,517 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -36 predicate places. [2023-08-30 03:12:40,517 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 158 flow [2023-08-30 03:12:40,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:40,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:12:40,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 03:12:40,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 03:12:40,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:12:40,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:12:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 43708787, now seen corresponding path program 1 times [2023-08-30 03:12:40,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:12:40,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078763143] [2023-08-30 03:12:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:12:40,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:12:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:12:40,599 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 03:12:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:12:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078763143] [2023-08-30 03:12:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078763143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:12:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:12:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:12:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882430744] [2023-08-30 03:12:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:12:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:12:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:12:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:12:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:12:40,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 366 [2023-08-30 03:12:40,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:40,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:12:40,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 366 [2023-08-30 03:12:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:12:46,169 INFO L130 PetriNetUnfolder]: 37248/49328 cut-off events. [2023-08-30 03:12:46,169 INFO L131 PetriNetUnfolder]: For 6584/7274 co-relation queries the response was YES. [2023-08-30 03:12:46,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115081 conditions, 49328 events. 37248/49328 cut-off events. For 6584/7274 co-relation queries the response was YES. Maximal size of possible extension queue 2997. Compared 299581 event pairs, 37248 based on Foata normal form. 1965/41457 useless extension candidates. Maximal degree in co-relation 115076. Up to 48775 conditions per place. [2023-08-30 03:12:46,358 INFO L137 encePairwiseOnDemand]: 351/366 looper letters, 42 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-30 03:12:46,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 47 transitions, 216 flow [2023-08-30 03:12:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:12:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:12:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-30 03:12:46,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-08-30 03:12:46,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-30 03:12:46,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-30 03:12:46,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:12:46,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-30 03:12:46,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:46,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:46,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:46,363 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 158 flow. Second operand 3 states and 486 transitions. [2023-08-30 03:12:46,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 47 transitions, 216 flow [2023-08-30 03:12:46,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:12:46,383 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 128 flow [2023-08-30 03:12:46,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2023-08-30 03:12:46,384 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -50 predicate places. [2023-08-30 03:12:46,386 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 128 flow [2023-08-30 03:12:46,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:12:46,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:12:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 03:12:46,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:12:46,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:12:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 355142010, now seen corresponding path program 1 times [2023-08-30 03:12:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:12:46,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283502923] [2023-08-30 03:12:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:12:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:12:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:12:47,314 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 03:12:47,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:12:47,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283502923] [2023-08-30 03:12:47,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283502923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:12:47,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:12:47,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 03:12:47,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529792740] [2023-08-30 03:12:47,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:12:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 03:12:47,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:12:47,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 03:12:47,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 03:12:47,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 366 [2023-08-30 03:12:47,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:47,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:12:47,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 366 [2023-08-30 03:12:47,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:12:52,600 INFO L130 PetriNetUnfolder]: 36853/48879 cut-off events. [2023-08-30 03:12:52,601 INFO L131 PetriNetUnfolder]: For 6434/6690 co-relation queries the response was YES. [2023-08-30 03:12:52,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113321 conditions, 48879 events. 36853/48879 cut-off events. For 6434/6690 co-relation queries the response was YES. Maximal size of possible extension queue 2923. Compared 298313 event pairs, 29213 based on Foata normal form. 0/39716 useless extension candidates. Maximal degree in co-relation 113316. Up to 46877 conditions per place. [2023-08-30 03:12:52,853 INFO L137 encePairwiseOnDemand]: 360/366 looper letters, 70 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-30 03:12:52,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 353 flow [2023-08-30 03:12:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:12:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:12:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-30 03:12:52,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465391621129326 [2023-08-30 03:12:52,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-30 03:12:52,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-30 03:12:52,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:12:52,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-30 03:12:52,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 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 03:12:52,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:52,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:52,862 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 128 flow. Second operand 3 states and 511 transitions. [2023-08-30 03:12:52,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 353 flow [2023-08-30 03:12:52,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:12:52,864 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 150 flow [2023-08-30 03:12:52,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-08-30 03:12:52,865 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -48 predicate places. [2023-08-30 03:12:52,865 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 150 flow [2023-08-30 03:12:52,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:52,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:12:52,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:12:52,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 03:12:52,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:12:52,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:12:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1810047354, now seen corresponding path program 1 times [2023-08-30 03:12:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:12:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91334844] [2023-08-30 03:12:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:12:52,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:12:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:12:53,549 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 03:12:53,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:12:53,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91334844] [2023-08-30 03:12:53,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91334844] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:12:53,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:12:53,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:12:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379130191] [2023-08-30 03:12:53,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:12:53,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:12:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:12:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:12:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:12:53,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-30 03:12:53,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:12:53,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:12:53,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-30 03:12:53,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:13:00,815 INFO L130 PetriNetUnfolder]: 48930/65330 cut-off events. [2023-08-30 03:13:00,815 INFO L131 PetriNetUnfolder]: For 11090/11875 co-relation queries the response was YES. [2023-08-30 03:13:00,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158085 conditions, 65330 events. 48930/65330 cut-off events. For 11090/11875 co-relation queries the response was YES. Maximal size of possible extension queue 3487. Compared 422345 event pairs, 9656 based on Foata normal form. 76/53646 useless extension candidates. Maximal degree in co-relation 158079. Up to 52332 conditions per place. [2023-08-30 03:13:01,135 INFO L137 encePairwiseOnDemand]: 359/366 looper letters, 88 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2023-08-30 03:13:01,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 98 transitions, 480 flow [2023-08-30 03:13:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:13:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:13:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 663 transitions. [2023-08-30 03:13:01,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45286885245901637 [2023-08-30 03:13:01,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 663 transitions. [2023-08-30 03:13:01,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 663 transitions. [2023-08-30 03:13:01,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:13:01,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 663 transitions. [2023-08-30 03:13:01,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:01,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:01,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:01,142 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 150 flow. Second operand 4 states and 663 transitions. [2023-08-30 03:13:01,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 98 transitions, 480 flow [2023-08-30 03:13:01,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 03:13:01,150 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 205 flow [2023-08-30 03:13:01,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2023-08-30 03:13:01,151 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -44 predicate places. [2023-08-30 03:13:01,151 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 205 flow [2023-08-30 03:13:01,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:01,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:13:01,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:13:01,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 03:13:01,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:13:01,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:13:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1875500305, now seen corresponding path program 1 times [2023-08-30 03:13:01,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:13:01,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445761534] [2023-08-30 03:13:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:13:01,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:13:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:13:01,563 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 03:13:01,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:13:01,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445761534] [2023-08-30 03:13:01,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445761534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:13:01,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:13:01,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:13:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348873804] [2023-08-30 03:13:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:13:01,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:13:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:13:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:13:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:13:01,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 366 [2023-08-30 03:13:01,634 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:01,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:13:01,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 366 [2023-08-30 03:13:01,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:13:08,739 INFO L130 PetriNetUnfolder]: 46718/62546 cut-off events. [2023-08-30 03:13:08,739 INFO L131 PetriNetUnfolder]: For 23470/23470 co-relation queries the response was YES. [2023-08-30 03:13:08,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154413 conditions, 62546 events. 46718/62546 cut-off events. For 23470/23470 co-relation queries the response was YES. Maximal size of possible extension queue 3046. Compared 380980 event pairs, 33432 based on Foata normal form. 0/58510 useless extension candidates. Maximal degree in co-relation 154405. Up to 37486 conditions per place. [2023-08-30 03:13:09,109 INFO L137 encePairwiseOnDemand]: 358/366 looper letters, 69 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-08-30 03:13:09,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 428 flow [2023-08-30 03:13:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:13:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:13:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-08-30 03:13:09,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248633879781421 [2023-08-30 03:13:09,111 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-08-30 03:13:09,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-08-30 03:13:09,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:13:09,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-08-30 03:13:09,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:09,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:09,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:09,116 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 205 flow. Second operand 4 states and 622 transitions. [2023-08-30 03:13:09,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 428 flow [2023-08-30 03:13:09,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 428 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 03:13:09,127 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 215 flow [2023-08-30 03:13:09,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-30 03:13:09,131 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -44 predicate places. [2023-08-30 03:13:09,131 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 215 flow [2023-08-30 03:13:09,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:09,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:13:09,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:13:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 03:13:09,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:13:09,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:13:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1675649775, now seen corresponding path program 1 times [2023-08-30 03:13:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:13:09,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269211506] [2023-08-30 03:13:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:13:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:13:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:13:09,531 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 03:13:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:13:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269211506] [2023-08-30 03:13:09,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269211506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:13:09,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:13:09,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 03:13:09,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988493296] [2023-08-30 03:13:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:13:09,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 03:13:09,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:13:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 03:13:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 03:13:09,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 366 [2023-08-30 03:13:09,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:09,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:13:09,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 366 [2023-08-30 03:13:09,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:13:15,388 INFO L130 PetriNetUnfolder]: 37640/51264 cut-off events. [2023-08-30 03:13:15,388 INFO L131 PetriNetUnfolder]: For 31630/32482 co-relation queries the response was YES. [2023-08-30 03:13:15,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128567 conditions, 51264 events. 37640/51264 cut-off events. For 31630/32482 co-relation queries the response was YES. Maximal size of possible extension queue 2849. Compared 332209 event pairs, 19565 based on Foata normal form. 0/48388 useless extension candidates. Maximal degree in co-relation 128557. Up to 43001 conditions per place. [2023-08-30 03:13:15,663 INFO L137 encePairwiseOnDemand]: 363/366 looper letters, 76 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-30 03:13:15,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 483 flow [2023-08-30 03:13:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 03:13:15,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 03:13:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-30 03:13:15,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45901639344262296 [2023-08-30 03:13:15,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-30 03:13:15,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-30 03:13:15,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:13:15,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-30 03:13:15,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:15,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:15,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:15,667 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 215 flow. Second operand 3 states and 504 transitions. [2023-08-30 03:13:15,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 483 flow [2023-08-30 03:13:15,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 474 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:13:15,691 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 221 flow [2023-08-30 03:13:15,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-08-30 03:13:15,691 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -43 predicate places. [2023-08-30 03:13:15,692 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 221 flow [2023-08-30 03:13:15,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:15,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:13:15,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:13:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 03:13:15,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:13:15,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:13:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1877226386, now seen corresponding path program 1 times [2023-08-30 03:13:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:13:15,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42985562] [2023-08-30 03:13:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:13:15,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:13:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:13:16,146 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 03:13:16,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:13:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42985562] [2023-08-30 03:13:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42985562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:13:16,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:13:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 03:13:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164101715] [2023-08-30 03:13:16,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:13:16,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 03:13:16,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:13:16,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 03:13:16,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 03:13:16,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 366 [2023-08-30 03:13:16,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:16,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:13:16,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 366 [2023-08-30 03:13:16,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 03:13:24,217 INFO L130 PetriNetUnfolder]: 54600/74090 cut-off events. [2023-08-30 03:13:24,217 INFO L131 PetriNetUnfolder]: For 46157/46157 co-relation queries the response was YES. [2023-08-30 03:13:24,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186357 conditions, 74090 events. 54600/74090 cut-off events. For 46157/46157 co-relation queries the response was YES. Maximal size of possible extension queue 3658. Compared 474590 event pairs, 34648 based on Foata normal form. 4110/75182 useless extension candidates. Maximal degree in co-relation 186346. Up to 52656 conditions per place. [2023-08-30 03:13:24,627 INFO L137 encePairwiseOnDemand]: 352/366 looper letters, 61 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-30 03:13:24,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 437 flow [2023-08-30 03:13:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 03:13:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 03:13:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 596 transitions. [2023-08-30 03:13:24,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40710382513661203 [2023-08-30 03:13:24,629 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 596 transitions. [2023-08-30 03:13:24,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 596 transitions. [2023-08-30 03:13:24,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 03:13:24,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 596 transitions. [2023-08-30 03:13:24,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:24,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:24,632 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:24,633 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 221 flow. Second operand 4 states and 596 transitions. [2023-08-30 03:13:24,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 437 flow [2023-08-30 03:13:24,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 74 transitions, 427 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 03:13:24,652 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 280 flow [2023-08-30 03:13:24,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2023-08-30 03:13:24,653 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -41 predicate places. [2023-08-30 03:13:24,653 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 280 flow [2023-08-30 03:13:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:24,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 03:13:24,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 03:13:24,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 03:13:24,654 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-08-30 03:13:24,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 03:13:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -36153151, now seen corresponding path program 2 times [2023-08-30 03:13:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 03:13:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878979647] [2023-08-30 03:13:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 03:13:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 03:13:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 03:13:25,192 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 03:13:25,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 03:13:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878979647] [2023-08-30 03:13:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878979647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 03:13:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 03:13:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 03:13:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718921371] [2023-08-30 03:13:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 03:13:25,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 03:13:25,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 03:13:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 03:13:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 03:13:25,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 366 [2023-08-30 03:13:25,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 03:13:25,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 03:13:25,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 366 [2023-08-30 03:13:25,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand