./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:26:28,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:26:28,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:26:28,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:26:28,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:26:28,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:26:28,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:26:28,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:26:28,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:26:28,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:26:28,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:26:28,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:26:28,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:26:28,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:26:28,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:26:28,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:26:28,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:26:28,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:26:28,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:26:28,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:26:28,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:26:28,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:26:28,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:26:28,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:26:28,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:26:28,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:26:28,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:26:28,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:26:28,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:26:28,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:26:28,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:26:28,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:26:28,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:26:28,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:26:28,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:26:28,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:26:28,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:26:28,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:26:28,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:26:28,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:26:28,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:26:28,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:26:28,961 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:26:28,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:26:28,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:26:28,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:26:28,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:26:28,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:26:28,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:26:28,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:26:28,964 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:26:28,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:26:28,965 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:26:28,966 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:26:28,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:26:28,967 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:26:28,967 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:26:28,967 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:26:28,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:26:28,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:26:28,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:26:28,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:26:28,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:26:28,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:26:28,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:26:28,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:26:28,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:26:28,969 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:26:28,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:26:28,969 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:26:28,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:26:29,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:26:29,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:26:29,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:26:29,234 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:26:29,234 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:26:29,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-29 23:26:30,115 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:26:30,275 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:26:30,276 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c [2023-08-29 23:26:30,279 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1d7d13f/4fd0e065205e41f7afd74efdc16db795/FLAG77f99adee [2023-08-29 23:26:30,288 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf1d7d13f/4fd0e065205e41f7afd74efdc16db795 [2023-08-29 23:26:30,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:26:30,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:26:30,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:26:30,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:26:30,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:26:30,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7893fe87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30, skipping insertion in model container [2023-08-29 23:26:30,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:26:30,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:26:30,420 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-29 23:26:30,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:26:30,430 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:26:30,452 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2023-08-29 23:26:30,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:26:30,464 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:26:30,466 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:26:30,470 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:26:30,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30 WrapperNode [2023-08-29 23:26:30,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:26:30,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:26:30,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:26:30,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:26:30,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,504 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-08-29 23:26:30,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:26:30,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:26:30,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:26:30,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:26:30,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:26:30,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:26:30,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:26:30,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:26:30,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (1/1) ... [2023-08-29 23:26:30,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:26:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:30,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:26:30,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:26:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:26:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:26:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:26:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:26:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:26:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:26:30,630 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:26:30,713 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:26:30,714 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:26:30,955 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:26:30,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:26:30,967 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 23:26:30,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:26:30 BoogieIcfgContainer [2023-08-29 23:26:30,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:26:30,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:26:30,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:26:30,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:26:30,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:26:30" (1/3) ... [2023-08-29 23:26:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f88086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:26:30, skipping insertion in model container [2023-08-29 23:26:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:26:30" (2/3) ... [2023-08-29 23:26:30,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f88086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:26:30, skipping insertion in model container [2023-08-29 23:26:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:26:30" (3/3) ... [2023-08-29 23:26:30,974 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2023-08-29 23:26:30,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:26:30,984 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-29 23:26:30,984 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:26:31,047 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-29 23:26:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 143 transitions, 310 flow [2023-08-29 23:26:31,142 INFO L130 PetriNetUnfolder]: 16/140 cut-off events. [2023-08-29 23:26:31,142 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:26:31,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 140 events. 16/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 189 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-08-29 23:26:31,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 143 transitions, 310 flow [2023-08-29 23:26:31,153 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 136 transitions, 290 flow [2023-08-29 23:26:31,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:26:31,167 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 136 transitions, 290 flow [2023-08-29 23:26:31,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 136 transitions, 290 flow [2023-08-29 23:26:31,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 136 transitions, 290 flow [2023-08-29 23:26:31,207 INFO L130 PetriNetUnfolder]: 16/136 cut-off events. [2023-08-29 23:26:31,207 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 23:26:31,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 136 events. 16/136 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 189 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-08-29 23:26:31,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 3888 [2023-08-29 23:26:34,932 INFO L134 LiptonReduction]: Checked pairs total: 3721 [2023-08-29 23:26:34,932 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-29 23:26:34,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:26:34,954 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;@69b12429, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:26:34,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-08-29 23:26:34,957 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 23:26:34,957 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:26:34,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:34,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:26:34,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:34,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash 589, now seen corresponding path program 1 times [2023-08-29 23:26:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:34,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448208573] [2023-08-29 23:26:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448208573] [2023-08-29 23:26:35,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448208573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:26:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482631108] [2023-08-29 23:26:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:26:35,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:26:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:26:35,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 285 [2023-08-29 23:26:35,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 285 [2023-08-29 23:26:35,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,112 INFO L130 PetriNetUnfolder]: 169/252 cut-off events. [2023-08-29 23:26:35,112 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-29 23:26:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 252 events. 169/252 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 546 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 380. Up to 253 conditions per place. [2023-08-29 23:26:35,114 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 29 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-08-29 23:26:35,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 134 flow [2023-08-29 23:26:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:26:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:26:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 292 transitions. [2023-08-29 23:26:35,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2023-08-29 23:26:35,132 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 292 transitions. [2023-08-29 23:26:35,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 292 transitions. [2023-08-29 23:26:35,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 292 transitions. [2023-08-29 23:26:35,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.0) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,144 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,145 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 82 flow. Second operand 2 states and 292 transitions. [2023-08-29 23:26:35,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 134 flow [2023-08-29 23:26:35,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 23:26:35,148 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2023-08-29 23:26:35,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-29 23:26:35,151 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-08-29 23:26:35,152 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2023-08-29 23:26:35,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 130.5) internal successors, (261), 2 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:35,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:26:35,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:26:35,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:35,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash 577311, now seen corresponding path program 1 times [2023-08-29 23:26:35,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:35,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024009882] [2023-08-29 23:26:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024009882] [2023-08-29 23:26:35,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024009882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:35,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582784007] [2023-08-29 23:26:35,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:35,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 285 [2023-08-29 23:26:35,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 285 [2023-08-29 23:26:35,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,422 INFO L130 PetriNetUnfolder]: 159/236 cut-off events. [2023-08-29 23:26:35,422 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:35,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 236 events. 159/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 501 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 479. Up to 236 conditions per place. [2023-08-29 23:26:35,424 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-29 23:26:35,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2023-08-29 23:26:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-08-29 23:26:35,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45497076023391814 [2023-08-29 23:26:35,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-08-29 23:26:35,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-08-29 23:26:35,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-08-29 23:26:35,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,428 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 389 transitions. [2023-08-29 23:26:35,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2023-08-29 23:26:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:26:35,429 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 62 flow [2023-08-29 23:26:35,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-29 23:26:35,430 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2023-08-29 23:26:35,430 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 62 flow [2023-08-29 23:26:35,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:35,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 23:26:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:26:35,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:35,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 577312, now seen corresponding path program 1 times [2023-08-29 23:26:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:35,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493237618] [2023-08-29 23:26:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493237618] [2023-08-29 23:26:35,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493237618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888828625] [2023-08-29 23:26:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:35,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 285 [2023-08-29 23:26:35,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 285 [2023-08-29 23:26:35,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,607 INFO L130 PetriNetUnfolder]: 149/220 cut-off events. [2023-08-29 23:26:35,607 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:35,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 220 events. 149/220 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 460 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 448. Up to 220 conditions per place. [2023-08-29 23:26:35,609 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-29 23:26:35,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 108 flow [2023-08-29 23:26:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-29 23:26:35,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47017543859649125 [2023-08-29 23:26:35,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-29 23:26:35,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-29 23:26:35,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-29 23:26:35,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,624 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 62 flow. Second operand 3 states and 402 transitions. [2023-08-29 23:26:35,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 108 flow [2023-08-29 23:26:35,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:35,625 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2023-08-29 23:26:35,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-29 23:26:35,626 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-29 23:26:35,628 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2023-08-29 23:26:35,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:35,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:26:35,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:26:35,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:35,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash 554808244, now seen corresponding path program 1 times [2023-08-29 23:26:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:35,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641143437] [2023-08-29 23:26:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641143437] [2023-08-29 23:26:35,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641143437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521026432] [2023-08-29 23:26:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:35,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:35,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 285 [2023-08-29 23:26:35,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 285 [2023-08-29 23:26:35,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,748 INFO L130 PetriNetUnfolder]: 139/204 cut-off events. [2023-08-29 23:26:35,748 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:35,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 204 events. 139/204 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 412 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 417. Up to 204 conditions per place. [2023-08-29 23:26:35,749 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-29 23:26:35,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 101 flow [2023-08-29 23:26:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-29 23:26:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2023-08-29 23:26:35,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-29 23:26:35,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-29 23:26:35,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-29 23:26:35,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,755 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 400 transitions. [2023-08-29 23:26:35,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 101 flow [2023-08-29 23:26:35,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:35,756 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2023-08-29 23:26:35,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-29 23:26:35,757 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -10 predicate places. [2023-08-29 23:26:35,757 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2023-08-29 23:26:35,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:35,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:26:35,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:26:35,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:35,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash 554808243, now seen corresponding path program 1 times [2023-08-29 23:26:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625764920] [2023-08-29 23:26:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625764920] [2023-08-29 23:26:35,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625764920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324977965] [2023-08-29 23:26:35,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:35,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 285 [2023-08-29 23:26:35,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 285 [2023-08-29 23:26:35,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:35,850 INFO L130 PetriNetUnfolder]: 129/188 cut-off events. [2023-08-29 23:26:35,850 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:35,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 188 events. 129/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 363 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 386. Up to 188 conditions per place. [2023-08-29 23:26:35,851 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-29 23:26:35,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 94 flow [2023-08-29 23:26:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-29 23:26:35,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447953216374269 [2023-08-29 23:26:35,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-29 23:26:35,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-29 23:26:35,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:35,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-29 23:26:35,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,855 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 56 flow. Second operand 3 states and 383 transitions. [2023-08-29 23:26:35,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 94 flow [2023-08-29 23:26:35,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:35,856 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 53 flow [2023-08-29 23:26:35,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-29 23:26:35,856 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2023-08-29 23:26:35,857 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 53 flow [2023-08-29 23:26:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:35,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:35,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:26:35,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:35,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash 594789108, now seen corresponding path program 1 times [2023-08-29 23:26:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:35,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516147232] [2023-08-29 23:26:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:35,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:35,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:35,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516147232] [2023-08-29 23:26:35,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516147232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:35,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:35,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:26:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448064015] [2023-08-29 23:26:35,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:35,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 23:26:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 23:26:35,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 23:26:35,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 285 [2023-08-29 23:26:35,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:35,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:35,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 285 [2023-08-29 23:26:35,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:36,005 INFO L130 PetriNetUnfolder]: 105/156 cut-off events. [2023-08-29 23:26:36,005 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:36,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 156 events. 105/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 278 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 323. Up to 156 conditions per place. [2023-08-29 23:26:36,006 INFO L137 encePairwiseOnDemand]: 283/285 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-29 23:26:36,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 91 flow [2023-08-29 23:26:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-29 23:26:36,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41754385964912283 [2023-08-29 23:26:36,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-29 23:26:36,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-29 23:26:36,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:36,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-29 23:26:36,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,015 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 53 flow. Second operand 3 states and 357 transitions. [2023-08-29 23:26:36,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 91 flow [2023-08-29 23:26:36,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:36,016 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 52 flow [2023-08-29 23:26:36,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-29 23:26:36,016 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2023-08-29 23:26:36,016 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 52 flow [2023-08-29 23:26:36,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:26:36,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:36,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash 594789109, now seen corresponding path program 1 times [2023-08-29 23:26:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:36,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792538764] [2023-08-29 23:26:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:36,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792538764] [2023-08-29 23:26:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792538764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:36,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:36,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:26:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856646972] [2023-08-29 23:26:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:36,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:36,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:36,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 285 [2023-08-29 23:26:36,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:36,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 285 [2023-08-29 23:26:36,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:36,185 INFO L130 PetriNetUnfolder]: 81/124 cut-off events. [2023-08-29 23:26:36,185 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 23:26:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 124 events. 81/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 195 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 260. Up to 124 conditions per place. [2023-08-29 23:26:36,186 INFO L137 encePairwiseOnDemand]: 283/285 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-29 23:26:36,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 88 flow [2023-08-29 23:26:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-29 23:26:36,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619883040935672 [2023-08-29 23:26:36,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-29 23:26:36,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-29 23:26:36,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:36,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-29 23:26:36,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,190 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 52 flow. Second operand 3 states and 395 transitions. [2023-08-29 23:26:36,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 88 flow [2023-08-29 23:26:36,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:36,191 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2023-08-29 23:26:36,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-29 23:26:36,192 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2023-08-29 23:26:36,192 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2023-08-29 23:26:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:26:36,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:36,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1438965518, now seen corresponding path program 1 times [2023-08-29 23:26:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:36,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219980264] [2023-08-29 23:26:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219980264] [2023-08-29 23:26:36,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219980264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:36,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:36,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:26:36,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227760283] [2023-08-29 23:26:36,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:36,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:36,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:36,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 285 [2023-08-29 23:26:36,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:36,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 285 [2023-08-29 23:26:36,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:36,286 INFO L130 PetriNetUnfolder]: 111/168 cut-off events. [2023-08-29 23:26:36,286 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:26:36,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 168 events. 111/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 359 event pairs, 7 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 352. Up to 137 conditions per place. [2023-08-29 23:26:36,287 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-29 23:26:36,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 131 flow [2023-08-29 23:26:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-29 23:26:36,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47719298245614034 [2023-08-29 23:26:36,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:36,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,291 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 51 flow. Second operand 3 states and 408 transitions. [2023-08-29 23:26:36,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 131 flow [2023-08-29 23:26:36,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:36,292 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 62 flow [2023-08-29 23:26:36,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-29 23:26:36,293 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-29 23:26:36,293 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 62 flow [2023-08-29 23:26:36,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 23:26:36,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:36,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,294 INFO L85 PathProgramCache]: Analyzing trace with hash -485828537, now seen corresponding path program 1 times [2023-08-29 23:26:36,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:36,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960030480] [2023-08-29 23:26:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960030480] [2023-08-29 23:26:36,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960030480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:26:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001717480] [2023-08-29 23:26:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:36,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 285 [2023-08-29 23:26:36,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:36,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 285 [2023-08-29 23:26:36,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:36,376 INFO L130 PetriNetUnfolder]: 161/240 cut-off events. [2023-08-29 23:26:36,376 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-29 23:26:36,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 240 events. 161/240 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 584 event pairs, 19 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 580. Up to 177 conditions per place. [2023-08-29 23:26:36,378 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-29 23:26:36,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 155 flow [2023-08-29 23:26:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-29 23:26:36,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47719298245614034 [2023-08-29 23:26:36,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:36,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,382 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 62 flow. Second operand 3 states and 408 transitions. [2023-08-29 23:26:36,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 155 flow [2023-08-29 23:26:36,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:36,383 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 72 flow [2023-08-29 23:26:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2023-08-29 23:26:36,383 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-08-29 23:26:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 72 flow [2023-08-29 23:26:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:26:36,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:36,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 902632079, now seen corresponding path program 1 times [2023-08-29 23:26:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391562543] [2023-08-29 23:26:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:26:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:36,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391562543] [2023-08-29 23:26:36,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391562543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:26:36,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:26:36,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:26:36,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916008286] [2023-08-29 23:26:36,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:26:36,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:26:36,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:26:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:26:36,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 285 [2023-08-29 23:26:36,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:36,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 285 [2023-08-29 23:26:36,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:36,491 INFO L130 PetriNetUnfolder]: 220/325 cut-off events. [2023-08-29 23:26:36,491 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-29 23:26:36,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 325 events. 220/325 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 799 event pairs, 48 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 869. Up to 199 conditions per place. [2023-08-29 23:26:36,493 INFO L137 encePairwiseOnDemand]: 282/285 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-29 23:26:36,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 177 flow [2023-08-29 23:26:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:26:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:26:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-29 23:26:36,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47719298245614034 [2023-08-29 23:26:36,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:36,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-29 23:26:36,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,497 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 72 flow. Second operand 3 states and 408 transitions. [2023-08-29 23:26:36,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 177 flow [2023-08-29 23:26:36,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:36,498 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 82 flow [2023-08-29 23:26:36,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-29 23:26:36,498 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-08-29 23:26:36,499 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 82 flow [2023-08-29 23:26:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:36,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:36,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:36,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:26:36,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:36,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1086789852, now seen corresponding path program 1 times [2023-08-29 23:26:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518430360] [2023-08-29 23:26:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:26:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:36,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518430360] [2023-08-29 23:26:36,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518430360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:36,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143703059] [2023-08-29 23:26:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:36,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:36,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:36,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:36,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 23:26:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:26:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:26:36,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-29 23:26:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143703059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:37,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:37,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-29 23:26:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428122817] [2023-08-29 23:26:37,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 23:26:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 23:26:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-08-29 23:26:37,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 285 [2023-08-29 23:26:37,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:37,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 285 [2023-08-29 23:26:37,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:37,247 INFO L130 PetriNetUnfolder]: 279/410 cut-off events. [2023-08-29 23:26:37,248 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-08-29 23:26:37,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 410 events. 279/410 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1159 event pairs, 6 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 1192. Up to 153 conditions per place. [2023-08-29 23:26:37,250 INFO L137 encePairwiseOnDemand]: 281/285 looper letters, 58 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2023-08-29 23:26:37,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 66 transitions, 365 flow [2023-08-29 23:26:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 23:26:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 23:26:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 851 transitions. [2023-08-29 23:26:37,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42656641604010026 [2023-08-29 23:26:37,252 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 851 transitions. [2023-08-29 23:26:37,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 851 transitions. [2023-08-29 23:26:37,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:37,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 851 transitions. [2023-08-29 23:26:37,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.57142857142857) internal successors, (851), 7 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 285.0) internal successors, (2280), 8 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,256 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 285.0) internal successors, (2280), 8 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,256 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 82 flow. Second operand 7 states and 851 transitions. [2023-08-29 23:26:37,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 66 transitions, 365 flow [2023-08-29 23:26:37,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 66 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:26:37,258 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 128 flow [2023-08-29 23:26:37,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=128, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2023-08-29 23:26:37,259 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-29 23:26:37,259 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 128 flow [2023-08-29 23:26:37,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.875) internal successors, (935), 8 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:37,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:37,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:37,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:37,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-29 23:26:37,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:37,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1899131191, now seen corresponding path program 2 times [2023-08-29 23:26:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601755316] [2023-08-29 23:26:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 23:26:37,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601755316] [2023-08-29 23:26:37,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601755316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800197382] [2023-08-29 23:26:37,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:26:37,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:37,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:37,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 23:26:37,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:26:37,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:37,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 23:26:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:37,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800197382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:38,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:38,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-08-29 23:26:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988470457] [2023-08-29 23:26:38,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:38,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 23:26:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:38,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 23:26:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-29 23:26:38,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 285 [2023-08-29 23:26:38,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 108.5) internal successors, (1085), 10 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:38,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:38,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 285 [2023-08-29 23:26:38,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:38,475 INFO L130 PetriNetUnfolder]: 543/790 cut-off events. [2023-08-29 23:26:38,475 INFO L131 PetriNetUnfolder]: For 738/738 co-relation queries the response was YES. [2023-08-29 23:26:38,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2522 conditions, 790 events. 543/790 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2518 event pairs, 0 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 2513. Up to 225 conditions per place. [2023-08-29 23:26:38,479 INFO L137 encePairwiseOnDemand]: 278/285 looper letters, 144 selfloop transitions, 48 changer transitions 0/192 dead transitions. [2023-08-29 23:26:38,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 192 transitions, 1158 flow [2023-08-29 23:26:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 23:26:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 23:26:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2469 transitions. [2023-08-29 23:26:38,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3937799043062201 [2023-08-29 23:26:38,485 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2469 transitions. [2023-08-29 23:26:38,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2469 transitions. [2023-08-29 23:26:38,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:38,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2469 transitions. [2023-08-29 23:26:38,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 112.22727272727273) internal successors, (2469), 22 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:38,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 285.0) internal successors, (6555), 23 states have internal predecessors, (6555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:38,497 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 285.0) internal successors, (6555), 23 states have internal predecessors, (6555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:38,497 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 128 flow. Second operand 22 states and 2469 transitions. [2023-08-29 23:26:38,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 192 transitions, 1158 flow [2023-08-29 23:26:38,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 192 transitions, 1018 flow, removed 57 selfloop flow, removed 2 redundant places. [2023-08-29 23:26:38,504 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 507 flow [2023-08-29 23:26:38,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=507, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-29 23:26:38,506 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2023-08-29 23:26:38,506 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 507 flow [2023-08-29 23:26:38,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.5) internal successors, (1085), 10 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:38,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:38,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:38,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:38,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-29 23:26:38,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:38,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1750624502, now seen corresponding path program 3 times [2023-08-29 23:26:38,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:38,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182600689] [2023-08-29 23:26:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:39,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:39,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182600689] [2023-08-29 23:26:39,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182600689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:39,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784974116] [2023-08-29 23:26:39,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 23:26:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:39,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:39,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 23:26:39,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-29 23:26:39,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:26:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:39,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784974116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:40,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-29 23:26:40,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031307009] [2023-08-29 23:26:40,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:26:40,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:40,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:26:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:26:40,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 285 [2023-08-29 23:26:40,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 507 flow. Second operand has 25 states, 25 states have (on average 92.44) internal successors, (2311), 25 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:40,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:40,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 285 [2023-08-29 23:26:40,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:45,093 INFO L130 PetriNetUnfolder]: 3866/5819 cut-off events. [2023-08-29 23:26:45,093 INFO L131 PetriNetUnfolder]: For 26710/26710 co-relation queries the response was YES. [2023-08-29 23:26:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28650 conditions, 5819 events. 3866/5819 cut-off events. For 26710/26710 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30959 event pairs, 2 based on Foata normal form. 24/5085 useless extension candidates. Maximal degree in co-relation 28631. Up to 1681 conditions per place. [2023-08-29 23:26:45,140 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 405 selfloop transitions, 550 changer transitions 92/1047 dead transitions. [2023-08-29 23:26:45,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1047 transitions, 8579 flow [2023-08-29 23:26:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-29 23:26:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-29 23:26:45,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 7800 transitions. [2023-08-29 23:26:45,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346435709526982 [2023-08-29 23:26:45,154 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 7800 transitions. [2023-08-29 23:26:45,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 7800 transitions. [2023-08-29 23:26:45,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:45,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 7800 transitions. [2023-08-29 23:26:45,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 98.73417721518987) internal successors, (7800), 79 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:45,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 285.0) internal successors, (22800), 80 states have internal predecessors, (22800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:45,201 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 285.0) internal successors, (22800), 80 states have internal predecessors, (22800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:45,201 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 507 flow. Second operand 79 states and 7800 transitions. [2023-08-29 23:26:45,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1047 transitions, 8579 flow [2023-08-29 23:26:45,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 1047 transitions, 7390 flow, removed 496 selfloop flow, removed 5 redundant places. [2023-08-29 23:26:45,286 INFO L231 Difference]: Finished difference. Result has 154 places, 648 transitions, 5505 flow [2023-08-29 23:26:45,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=5505, PETRI_PLACES=154, PETRI_TRANSITIONS=648} [2023-08-29 23:26:45,287 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 115 predicate places. [2023-08-29 23:26:45,287 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 648 transitions, 5505 flow [2023-08-29 23:26:45,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 92.44) internal successors, (2311), 25 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:45,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:45,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:45,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 23:26:45,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:45,494 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:45,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1859784356, now seen corresponding path program 4 times [2023-08-29 23:26:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:45,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884120897] [2023-08-29 23:26:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:46,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884120897] [2023-08-29 23:26:46,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884120897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778366245] [2023-08-29 23:26:46,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 23:26:46,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:46,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:46,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:46,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 23:26:46,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 23:26:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:26:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:46,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:47,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778366245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:47,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:47,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-08-29 23:26:47,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965994226] [2023-08-29 23:26:47,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 23:26:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 23:26:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-08-29 23:26:47,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 285 [2023-08-29 23:26:47,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 648 transitions, 5505 flow. Second operand has 23 states, 23 states have (on average 92.21739130434783) internal successors, (2121), 23 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:47,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:47,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 285 [2023-08-29 23:26:47,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:26:53,338 INFO L130 PetriNetUnfolder]: 11499/16831 cut-off events. [2023-08-29 23:26:53,338 INFO L131 PetriNetUnfolder]: For 87247/87247 co-relation queries the response was YES. [2023-08-29 23:26:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94544 conditions, 16831 events. 11499/16831 cut-off events. For 87247/87247 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 101121 event pairs, 46 based on Foata normal form. 70/14713 useless extension candidates. Maximal degree in co-relation 94516. Up to 5161 conditions per place. [2023-08-29 23:26:53,447 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 616 selfloop transitions, 1958 changer transitions 68/2642 dead transitions. [2023-08-29 23:26:53,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 2642 transitions, 28317 flow [2023-08-29 23:26:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-29 23:26:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-29 23:26:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5972 transitions. [2023-08-29 23:26:53,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34923976608187135 [2023-08-29 23:26:53,453 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5972 transitions. [2023-08-29 23:26:53,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5972 transitions. [2023-08-29 23:26:53,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:26:53,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5972 transitions. [2023-08-29 23:26:53,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 99.53333333333333) internal successors, (5972), 60 states have internal predecessors, (5972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:53,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 285.0) internal successors, (17385), 61 states have internal predecessors, (17385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:53,473 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 285.0) internal successors, (17385), 61 states have internal predecessors, (17385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:53,474 INFO L175 Difference]: Start difference. First operand has 154 places, 648 transitions, 5505 flow. Second operand 60 states and 5972 transitions. [2023-08-29 23:26:53,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 2642 transitions, 28317 flow [2023-08-29 23:26:54,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 2642 transitions, 23307 flow, removed 2501 selfloop flow, removed 4 redundant places. [2023-08-29 23:26:54,726 INFO L231 Difference]: Finished difference. Result has 226 places, 2249 transitions, 23189 flow [2023-08-29 23:26:54,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=23189, PETRI_PLACES=226, PETRI_TRANSITIONS=2249} [2023-08-29 23:26:54,727 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 187 predicate places. [2023-08-29 23:26:54,727 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 2249 transitions, 23189 flow [2023-08-29 23:26:54,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 92.21739130434783) internal successors, (2121), 23 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:54,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:26:54,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:26:54,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 23:26:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:54,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:26:54,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:26:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1323866154, now seen corresponding path program 5 times [2023-08-29 23:26:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:26:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549410558] [2023-08-29 23:26:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:26:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:26:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:26:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:26:55,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549410558] [2023-08-29 23:26:55,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549410558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:26:55,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238247473] [2023-08-29 23:26:55,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 23:26:55,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:26:55,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:26:55,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:26:55,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 23:26:55,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:26:55,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:26:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-29 23:26:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:26:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:26:55,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:26:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 23:26:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238247473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:26:56,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:26:56,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-08-29 23:26:56,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240299132] [2023-08-29 23:26:56,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:26:56,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 23:26:56,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:26:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 23:26:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-29 23:26:57,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 285 [2023-08-29 23:26:57,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 2249 transitions, 23189 flow. Second operand has 20 states, 20 states have (on average 92.9) internal successors, (1858), 20 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:26:57,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:26:57,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 285 [2023-08-29 23:26:57,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:06,254 INFO L130 PetriNetUnfolder]: 17552/26070 cut-off events. [2023-08-29 23:27:06,254 INFO L131 PetriNetUnfolder]: For 155073/155073 co-relation queries the response was YES. [2023-08-29 23:27:06,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151796 conditions, 26070 events. 17552/26070 cut-off events. For 155073/155073 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 171628 event pairs, 194 based on Foata normal form. 180/25660 useless extension candidates. Maximal degree in co-relation 151750. Up to 6279 conditions per place. [2023-08-29 23:27:06,475 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 1265 selfloop transitions, 3351 changer transitions 235/4851 dead transitions. [2023-08-29 23:27:06,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 4851 transitions, 61589 flow [2023-08-29 23:27:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-29 23:27:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-29 23:27:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6315 transitions. [2023-08-29 23:27:06,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408906882591093 [2023-08-29 23:27:06,481 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6315 transitions. [2023-08-29 23:27:06,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6315 transitions. [2023-08-29 23:27:06,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:06,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6315 transitions. [2023-08-29 23:27:06,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 97.15384615384616) internal successors, (6315), 65 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:06,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 285.0) internal successors, (18810), 66 states have internal predecessors, (18810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:06,503 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 285.0) internal successors, (18810), 66 states have internal predecessors, (18810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:06,504 INFO L175 Difference]: Start difference. First operand has 226 places, 2249 transitions, 23189 flow. Second operand 65 states and 6315 transitions. [2023-08-29 23:27:06,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 4851 transitions, 61589 flow [2023-08-29 23:27:15,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 4851 transitions, 57164 flow, removed 2193 selfloop flow, removed 8 redundant places. [2023-08-29 23:27:15,313 INFO L231 Difference]: Finished difference. Result has 316 places, 4300 transitions, 57347 flow [2023-08-29 23:27:15,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=21376, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=57347, PETRI_PLACES=316, PETRI_TRANSITIONS=4300} [2023-08-29 23:27:15,315 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 277 predicate places. [2023-08-29 23:27:15,315 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 4300 transitions, 57347 flow [2023-08-29 23:27:15,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 92.9) internal successors, (1858), 20 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:15,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:27:15,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:27:15,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-29 23:27:15,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-29 23:27:15,520 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:27:15,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:27:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1749626504, now seen corresponding path program 6 times [2023-08-29 23:27:15,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:27:15,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212614639] [2023-08-29 23:27:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:27:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:27:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:27:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:27:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212614639] [2023-08-29 23:27:16,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212614639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:27:16,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210946120] [2023-08-29 23:27:16,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-29 23:27:16,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:27:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:27:16,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:27:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 23:27:16,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-29 23:27:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:27:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-29 23:27:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:27:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:16,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:27:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:27:17,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210946120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:27:17,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:27:17,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-29 23:27:17,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746085410] [2023-08-29 23:27:17,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:27:17,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 23:27:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:27:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 23:27:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2023-08-29 23:27:17,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 285 [2023-08-29 23:27:17,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 4300 transitions, 57347 flow. Second operand has 24 states, 24 states have (on average 92.58333333333333) internal successors, (2222), 24 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:17,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:27:17,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 285 [2023-08-29 23:27:17,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:27:46,880 INFO L130 PetriNetUnfolder]: 29055/42872 cut-off events. [2023-08-29 23:27:46,881 INFO L131 PetriNetUnfolder]: For 320789/320789 co-relation queries the response was YES. [2023-08-29 23:27:47,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289932 conditions, 42872 events. 29055/42872 cut-off events. For 320789/320789 co-relation queries the response was YES. Maximal size of possible extension queue 2280. Compared 297965 event pairs, 158 based on Foata normal form. 192/43064 useless extension candidates. Maximal degree in co-relation 289853. Up to 12383 conditions per place. [2023-08-29 23:27:47,552 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 1430 selfloop transitions, 7557 changer transitions 212/9199 dead transitions. [2023-08-29 23:27:47,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 9199 transitions, 141672 flow [2023-08-29 23:27:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-08-29 23:27:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-08-29 23:27:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 12074 transitions. [2023-08-29 23:27:47,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34165251839275607 [2023-08-29 23:27:47,562 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 12074 transitions. [2023-08-29 23:27:47,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 12074 transitions. [2023-08-29 23:27:47,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:27:47,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 12074 transitions. [2023-08-29 23:27:47,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 97.37096774193549) internal successors, (12074), 124 states have internal predecessors, (12074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:47,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 285.0) internal successors, (35625), 125 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:47,596 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 285.0) internal successors, (35625), 125 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:27:47,596 INFO L175 Difference]: Start difference. First operand has 316 places, 4300 transitions, 57347 flow. Second operand 124 states and 12074 transitions. [2023-08-29 23:27:47,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 9199 transitions, 141672 flow [2023-08-29 23:28:25,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 9199 transitions, 135419 flow, removed 3002 selfloop flow, removed 14 redundant places. [2023-08-29 23:28:25,459 INFO L231 Difference]: Finished difference. Result has 465 places, 8503 transitions, 138729 flow [2023-08-29 23:28:25,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=53434, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3792, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=138729, PETRI_PLACES=465, PETRI_TRANSITIONS=8503} [2023-08-29 23:28:25,462 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 426 predicate places. [2023-08-29 23:28:25,462 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 8503 transitions, 138729 flow [2023-08-29 23:28:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 92.58333333333333) internal successors, (2222), 24 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:25,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:28:25,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:28:25,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 23:28:25,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-29 23:28:25,669 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:28:25,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:28:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1065329082, now seen corresponding path program 7 times [2023-08-29 23:28:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:28:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190950216] [2023-08-29 23:28:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:28:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:28:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:28:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190950216] [2023-08-29 23:28:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190950216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:28:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096529730] [2023-08-29 23:28:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-29 23:28:26,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:28:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:28:26,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:28:26,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 23:28:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:28:26,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-29 23:28:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:28:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:26,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:28:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:28:27,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096529730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:28:27,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:28:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-29 23:28:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518379815] [2023-08-29 23:28:27,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:28:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:28:27,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:28:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:28:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:28:27,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 285 [2023-08-29 23:28:27,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 8503 transitions, 138729 flow. Second operand has 25 states, 25 states have (on average 93.08) internal successors, (2327), 25 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:28:27,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:28:27,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 285 [2023-08-29 23:28:27,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:29:32,047 INFO L130 PetriNetUnfolder]: 40893/59568 cut-off events. [2023-08-29 23:29:32,047 INFO L131 PetriNetUnfolder]: For 557187/557187 co-relation queries the response was YES. [2023-08-29 23:29:33,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469940 conditions, 59568 events. 40893/59568 cut-off events. For 557187/557187 co-relation queries the response was YES. Maximal size of possible extension queue 3312. Compared 423252 event pairs, 1430 based on Foata normal form. 91/59659 useless extension candidates. Maximal degree in co-relation 469825. Up to 22164 conditions per place. [2023-08-29 23:29:33,881 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 4968 selfloop transitions, 9641 changer transitions 101/14710 dead transitions. [2023-08-29 23:29:33,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 14710 transitions, 271642 flow [2023-08-29 23:29:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-08-29 23:29:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-08-29 23:29:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 11891 transitions. [2023-08-29 23:29:33,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392098131507631 [2023-08-29 23:29:33,890 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 11891 transitions. [2023-08-29 23:29:33,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 11891 transitions. [2023-08-29 23:29:33,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:29:33,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 11891 transitions. [2023-08-29 23:29:33,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 96.67479674796748) internal successors, (11891), 123 states have internal predecessors, (11891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:33,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 285.0) internal successors, (35340), 124 states have internal predecessors, (35340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:33,923 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 285.0) internal successors, (35340), 124 states have internal predecessors, (35340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:29:33,923 INFO L175 Difference]: Start difference. First operand has 465 places, 8503 transitions, 138729 flow. Second operand 123 states and 11891 transitions. [2023-08-29 23:29:33,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 14710 transitions, 271642 flow [2023-08-29 23:31:51,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 14710 transitions, 251467 flow, removed 9914 selfloop flow, removed 10 redundant places. [2023-08-29 23:31:51,357 INFO L231 Difference]: Finished difference. Result has 636 places, 14196 transitions, 255405 flow [2023-08-29 23:31:51,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=127254, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=255405, PETRI_PLACES=636, PETRI_TRANSITIONS=14196} [2023-08-29 23:31:51,363 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 597 predicate places. [2023-08-29 23:31:51,363 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 14196 transitions, 255405 flow [2023-08-29 23:31:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.08) internal successors, (2327), 25 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:51,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:31:51,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:31:51,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 23:31:51,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:31:51,569 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-08-29 23:31:51,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:31:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1554135876, now seen corresponding path program 8 times [2023-08-29 23:31:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:31:51,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956183910] [2023-08-29 23:31:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:31:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:31:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:31:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:52,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:31:52,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956183910] [2023-08-29 23:31:52,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956183910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 23:31:52,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525502280] [2023-08-29 23:31:52,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 23:31:52,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 23:31:52,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:31:52,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 23:31:52,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 23:31:52,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 23:31:52,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 23:31:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-29 23:31:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 23:31:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 23:31:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:31:53,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525502280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 23:31:53,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 23:31:53,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-29 23:31:53,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121321066] [2023-08-29 23:31:53,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 23:31:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 23:31:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:31:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 23:31:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-08-29 23:31:53,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 285 [2023-08-29 23:31:53,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 14196 transitions, 255405 flow. Second operand has 25 states, 25 states have (on average 92.24) internal successors, (2306), 25 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:31:53,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:31:53,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 285 [2023-08-29 23:31:53,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:37:01,069 INFO L130 PetriNetUnfolder]: 104462/148898 cut-off events. [2023-08-29 23:37:01,070 INFO L131 PetriNetUnfolder]: For 1633196/1633196 co-relation queries the response was YES. [2023-08-29 23:37:08,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283882 conditions, 148898 events. 104462/148898 cut-off events. For 1633196/1633196 co-relation queries the response was YES. Maximal size of possible extension queue 7270. Compared 1125516 event pairs, 632 based on Foata normal form. 2001/150859 useless extension candidates. Maximal degree in co-relation 1283711. Up to 51833 conditions per place. [2023-08-29 23:37:08,935 INFO L137 encePairwiseOnDemand]: 277/285 looper letters, 7680 selfloop transitions, 30830 changer transitions 1268/39778 dead transitions. [2023-08-29 23:37:08,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 39778 transitions, 814976 flow [2023-08-29 23:37:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2023-08-29 23:37:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2023-08-29 23:37:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 19566 transitions. [2023-08-29 23:37:08,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432631578947368 [2023-08-29 23:37:08,949 INFO L72 ComplementDD]: Start complementDD. Operand 200 states and 19566 transitions. [2023-08-29 23:37:08,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 19566 transitions. [2023-08-29 23:37:08,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:37:08,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 200 states and 19566 transitions. [2023-08-29 23:37:08,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 201 states, 200 states have (on average 97.83) internal successors, (19566), 200 states have internal predecessors, (19566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:09,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 201 states, 201 states have (on average 285.0) internal successors, (57285), 201 states have internal predecessors, (57285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:09,075 INFO L81 ComplementDD]: Finished complementDD. Result has 201 states, 201 states have (on average 285.0) internal successors, (57285), 201 states have internal predecessors, (57285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:37:09,075 INFO L175 Difference]: Start difference. First operand has 636 places, 14196 transitions, 255405 flow. Second operand 200 states and 19566 transitions. [2023-08-29 23:37:09,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 39778 transitions, 814976 flow Killed by 15