./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:04:43,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:04:43,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:04:43,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:04:43,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:04:43,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:04:43,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:04:43,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:04:43,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:04:43,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:04:43,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:04:43,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:04:43,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:04:43,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:04:43,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:04:43,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:04:43,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:04:43,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:04:43,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:04:43,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:04:43,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:04:43,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:04:43,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:04:43,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:04:43,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:04:43,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:04:43,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:04:43,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:04:43,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:04:43,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:04:43,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:04:43,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:04:43,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:04:43,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:04:43,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:04:43,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:04:43,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:04:43,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:04:43,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:04:43,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:04:43,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:04:43,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:04:43,962 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:04:43,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:04:43,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:04:43,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:04:43,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:04:43,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:04:43,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:04:43,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:04:43,965 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:04:43,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:04:43,966 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:04:43,966 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:04:43,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:04:43,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:04:43,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:04:43,967 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:04:43,967 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:04:43,967 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:04:43,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:04:43,968 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:04:43,968 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:04:43,968 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:04:43,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:04:43,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:04:43,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:04:43,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:04:43,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:04:43,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:04:43,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:04:43,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:04:43,970 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:04:43,970 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:04:43,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:04:43,970 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:04:43,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:04:44,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:04:44,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:04:44,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:04:44,310 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:04:44,311 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:04:44,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-08-30 04:04:45,482 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:04:45,739 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:04:45,739 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i [2023-08-30 04:04:45,759 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886792c6f/28ff6a0186b34ec0bc78fab554d81f69/FLAGeb69e3d4b [2023-08-30 04:04:45,775 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886792c6f/28ff6a0186b34ec0bc78fab554d81f69 [2023-08-30 04:04:45,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:04:45,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:04:45,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:04:45,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:04:45,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:04:45,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:04:45" (1/1) ... [2023-08-30 04:04:45,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f46683b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:45, skipping insertion in model container [2023-08-30 04:04:45,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:04:45" (1/1) ... [2023-08-30 04:04:45,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:04:45,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:04:46,274 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2023-08-30 04:04:46,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:04:46,315 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:04:46,353 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2023-08-30 04:04:46,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:04:46,427 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:04:46,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46 WrapperNode [2023-08-30 04:04:46,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:04:46,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:04:46,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:04:46,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:04:46,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,500 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-08-30 04:04:46,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:04:46,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:04:46,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:04:46,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:04:46,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,529 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:04:46,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:04:46,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:04:46,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:04:46,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (1/1) ... [2023-08-30 04:04:46,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:04:46,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:46,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:04:46,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:04:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:04:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:04:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:04:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:04:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:04:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:04:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:04:46,603 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:04:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:04:46,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:04:46,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:04:46,604 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:04:46,729 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:04:46,731 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:04:46,994 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:04:47,000 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:04:47,000 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 04:04:47,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:04:47 BoogieIcfgContainer [2023-08-30 04:04:47,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:04:47,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:04:47,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:04:47,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:04:47,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:04:45" (1/3) ... [2023-08-30 04:04:47,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e0b243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:04:47, skipping insertion in model container [2023-08-30 04:04:47,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:46" (2/3) ... [2023-08-30 04:04:47,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e0b243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:04:47, skipping insertion in model container [2023-08-30 04:04:47,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:04:47" (3/3) ... [2023-08-30 04:04:47,013 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2023-08-30 04:04:47,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:04:47,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:04:47,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:04:47,115 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:04:47,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:47,266 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-30 04:04:47,267 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:04:47,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 178 events. 23/178 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-30 04:04:47,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:47,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:47,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:47,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:47,291 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:47,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:47,327 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-30 04:04:47,327 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:04:47,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 178 events. 23/178 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 438 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-30 04:04:47,339 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-30 04:04:50,734 INFO L134 LiptonReduction]: Checked pairs total: 5768 [2023-08-30 04:04:50,734 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-30 04:04:50,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:50,751 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;@7c53642, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:50,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:50,754 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:04:50,754 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:50,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:50,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:50,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:50,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:50,760 INFO L85 PathProgramCache]: Analyzing trace with hash 15832, now seen corresponding path program 1 times [2023-08-30 04:04:50,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014738583] [2023-08-30 04:04:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:51,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:51,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014738583] [2023-08-30 04:04:51,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014738583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:51,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:51,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117598536] [2023-08-30 04:04:51,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:51,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:51,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 243 [2023-08-30 04:04:51,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 41 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:51,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 243 [2023-08-30 04:04:51,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:51,220 INFO L130 PetriNetUnfolder]: 131/295 cut-off events. [2023-08-30 04:04:51,220 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:04:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 295 events. 131/295 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1243 event pairs, 104 based on Foata normal form. 26/240 useless extension candidates. Maximal degree in co-relation 545. Up to 255 conditions per place. [2023-08-30 04:04:51,224 INFO L137 encePairwiseOnDemand]: 229/243 looper letters, 32 selfloop transitions, 2 changer transitions 2/38 dead transitions. [2023-08-30 04:04:51,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 156 flow [2023-08-30 04:04:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-30 04:04:51,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130315500685871 [2023-08-30 04:04:51,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-30 04:04:51,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-30 04:04:51,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:51,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-30 04:04:51,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,251 INFO L175 Difference]: Start difference. First operand has 33 places, 41 transitions, 90 flow. Second operand 3 states and 374 transitions. [2023-08-30 04:04:51,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 156 flow [2023-08-30 04:04:51,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:04:51,255 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 68 flow [2023-08-30 04:04:51,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-30 04:04:51,260 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-30 04:04:51,260 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 68 flow [2023-08-30 04:04:51,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:51,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:04:51,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:51,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 15830, now seen corresponding path program 1 times [2023-08-30 04:04:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:51,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395312126] [2023-08-30 04:04:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:51,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:51,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395312126] [2023-08-30 04:04:51,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395312126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:51,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:51,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498923455] [2023-08-30 04:04:51,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:51,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 243 [2023-08-30 04:04:51,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:51,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 243 [2023-08-30 04:04:51,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:51,500 INFO L130 PetriNetUnfolder]: 113/249 cut-off events. [2023-08-30 04:04:51,500 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 04:04:51,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 249 events. 113/249 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 928 event pairs, 84 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 486. Up to 236 conditions per place. [2023-08-30 04:04:51,502 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 33 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 04:04:51,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 156 flow [2023-08-30 04:04:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-30 04:04:51,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50480109739369 [2023-08-30 04:04:51,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-30 04:04:51,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-30 04:04:51,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:51,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-30 04:04:51,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,514 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 68 flow. Second operand 3 states and 368 transitions. [2023-08-30 04:04:51,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 156 flow [2023-08-30 04:04:51,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:04:51,517 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-08-30 04:04:51,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-30 04:04:51,518 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-30 04:04:51,518 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-08-30 04:04:51,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:51,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:51,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:04:51,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:04:51,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:51,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 471973036, now seen corresponding path program 1 times [2023-08-30 04:04:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389428304] [2023-08-30 04:04:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:51,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389428304] [2023-08-30 04:04:51,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389428304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:51,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058314949] [2023-08-30 04:04:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:51,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:51,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:51,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:04:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 04:04:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:04:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:51,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:04:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:51,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:51,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058314949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:51,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:51,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:04:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479240102] [2023-08-30 04:04:51,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:51,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:04:51,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:04:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:04:52,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 243 [2023-08-30 04:04:52,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 107.875) internal successors, (863), 8 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:52,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:52,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 243 [2023-08-30 04:04:52,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:52,077 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2023-08-30 04:04:52,077 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:04:52,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 48 events. 16/48 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 7 based on Foata normal form. 9/57 useless extension candidates. Maximal degree in co-relation 103. Up to 34 conditions per place. [2023-08-30 04:04:52,078 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 04:04:52,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2023-08-30 04:04:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:04:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:04:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2023-08-30 04:04:52,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2023-08-30 04:04:52,080 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 448 transitions. [2023-08-30 04:04:52,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 448 transitions. [2023-08-30 04:04:52,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:52,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 448 transitions. [2023-08-30 04:04:52,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:52,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:52,085 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:52,085 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 4 states and 448 transitions. [2023-08-30 04:04:52,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2023-08-30 04:04:52,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 93 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:04:52,086 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2023-08-30 04:04:52,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-30 04:04:52,087 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -13 predicate places. [2023-08-30 04:04:52,087 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2023-08-30 04:04:52,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.875) internal successors, (863), 8 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:52,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:52,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:04:52,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 04:04:52,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:52,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:52,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1746262609, now seen corresponding path program 1 times [2023-08-30 04:04:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:52,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39251909] [2023-08-30 04:04:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:52,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:04:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:52,342 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:04:52,342 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:04:52,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:04:52,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:04:52,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:04:52,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:04:52,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:04:52,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:04:52,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:04:52,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:04:52,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:04:52,351 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:04:52,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:04:52,371 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:04:52,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:52,422 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-30 04:04:52,426 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:04:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 874 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 9 conditions per place. [2023-08-30 04:04:52,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:52,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:52,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:52,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:52,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:52,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:52,471 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-30 04:04:52,471 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:04:52,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 286 events. 40/286 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 874 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 9 conditions per place. [2023-08-30 04:04:52,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-30 04:04:55,619 INFO L134 LiptonReduction]: Checked pairs total: 19105 [2023-08-30 04:04:55,619 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-30 04:04:55,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:55,622 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;@7c53642, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:55,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:55,623 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:04:55,624 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:55,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:55,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:55,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:55,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash 25975, now seen corresponding path program 1 times [2023-08-30 04:04:55,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:55,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660503409] [2023-08-30 04:04:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:55,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:55,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:55,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660503409] [2023-08-30 04:04:55,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660503409] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:55,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:55,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:55,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015814020] [2023-08-30 04:04:55,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:55,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:55,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 287 [2023-08-30 04:04:55,696 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:55,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:55,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 287 [2023-08-30 04:04:55,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:56,014 INFO L130 PetriNetUnfolder]: 1812/3286 cut-off events. [2023-08-30 04:04:56,015 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 04:04:56,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6277 conditions, 3286 events. 1812/3286 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20796 event pairs, 1484 based on Foata normal form. 369/3067 useless extension candidates. Maximal degree in co-relation 3216. Up to 2530 conditions per place. [2023-08-30 04:04:56,032 INFO L137 encePairwiseOnDemand]: 268/287 looper letters, 46 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2023-08-30 04:04:56,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 236 flow [2023-08-30 04:04:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 04:04:56,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389082462253194 [2023-08-30 04:04:56,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 04:04:56,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 04:04:56,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:56,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 04:04:56,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,039 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 464 transitions. [2023-08-30 04:04:56,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 236 flow [2023-08-30 04:04:56,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 60 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:04:56,044 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 112 flow [2023-08-30 04:04:56,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-30 04:04:56,046 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-30 04:04:56,046 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 112 flow [2023-08-30 04:04:56,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:56,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:04:56,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:56,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash 25976, now seen corresponding path program 1 times [2023-08-30 04:04:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426862959] [2023-08-30 04:04:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426862959] [2023-08-30 04:04:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426862959] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723131087] [2023-08-30 04:04:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:56,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:56,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:56,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 287 [2023-08-30 04:04:56,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:56,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 287 [2023-08-30 04:04:56,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:56,433 INFO L130 PetriNetUnfolder]: 1686/3000 cut-off events. [2023-08-30 04:04:56,433 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-30 04:04:56,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5864 conditions, 3000 events. 1686/3000 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18542 event pairs, 1046 based on Foata normal form. 0/2619 useless extension candidates. Maximal degree in co-relation 5350. Up to 2717 conditions per place. [2023-08-30 04:04:56,449 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 40 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 04:04:56,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 212 flow [2023-08-30 04:04:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 04:04:56,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2023-08-30 04:04:56,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 04:04:56,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 04:04:56,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:56,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 04:04:56,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,456 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 112 flow. Second operand 3 states and 441 transitions. [2023-08-30 04:04:56,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 212 flow [2023-08-30 04:04:56,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:04:56,461 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 124 flow [2023-08-30 04:04:56,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-30 04:04:56,465 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-30 04:04:56,465 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 124 flow [2023-08-30 04:04:56,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:56,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:04:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:04:56,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:56,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1759538357, now seen corresponding path program 1 times [2023-08-30 04:04:56,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:56,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137125255] [2023-08-30 04:04:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:56,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:56,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:56,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137125255] [2023-08-30 04:04:56,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137125255] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180404787] [2023-08-30 04:04:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:56,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:56,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:04:56,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 04:04:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:56,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:04:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:56,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:04:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:56,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:04:56,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180404787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:56,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:56,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:04:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682396181] [2023-08-30 04:04:56,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:56,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:04:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:04:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:04:56,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 287 [2023-08-30 04:04:56,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:56,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:56,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 287 [2023-08-30 04:04:56,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:57,086 INFO L130 PetriNetUnfolder]: 1520/2596 cut-off events. [2023-08-30 04:04:57,086 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-30 04:04:57,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5336 conditions, 2596 events. 1520/2596 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15130 event pairs, 519 based on Foata normal form. 7/2316 useless extension candidates. Maximal degree in co-relation 762. Up to 2091 conditions per place. [2023-08-30 04:04:57,100 INFO L137 encePairwiseOnDemand]: 281/287 looper letters, 66 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-30 04:04:57,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 332 flow [2023-08-30 04:04:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:04:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:04:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 719 transitions. [2023-08-30 04:04:57,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010452961672474 [2023-08-30 04:04:57,103 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 719 transitions. [2023-08-30 04:04:57,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 719 transitions. [2023-08-30 04:04:57,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:57,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 719 transitions. [2023-08-30 04:04:57,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:57,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:57,108 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 287.0) internal successors, (1722), 6 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:57,108 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 124 flow. Second operand 5 states and 719 transitions. [2023-08-30 04:04:57,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 332 flow [2023-08-30 04:04:57,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:04:57,111 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 132 flow [2023-08-30 04:04:57,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-30 04:04:57,111 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 04:04:57,112 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 132 flow [2023-08-30 04:04:57,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:04:57,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:57,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:04:57,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:04:57,318 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,SelfDestructingSolverStorable6 [2023-08-30 04:04:57,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:04:57,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2092667315, now seen corresponding path program 1 times [2023-08-30 04:04:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:57,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945086358] [2023-08-30 04:04:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:57,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:57,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:04:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:57,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:04:57,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:04:57,354 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:04:57,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:04:57,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:04:57,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:04:57,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:04:57,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:04:57,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:04:57,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:04:57,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:04:57,358 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:04:57,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:04:57,381 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:04:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:57,422 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-30 04:04:57,423 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:04:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 62/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-30 04:04:57,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:57,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:57,429 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:57,429 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:57,429 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:57,464 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-30 04:04:57,464 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:04:57,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 435 events. 62/435 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 294. Up to 16 conditions per place. [2023-08-30 04:04:57,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-30 04:05:00,709 INFO L134 LiptonReduction]: Checked pairs total: 37564 [2023-08-30 04:05:00,709 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 04:05:00,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:05:00,713 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;@7c53642, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:05:00,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:05:00,715 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:05:00,715 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:05:00,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:00,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:05:00,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:00,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash 37453, now seen corresponding path program 1 times [2023-08-30 04:05:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:00,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795187889] [2023-08-30 04:05:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:00,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:00,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795187889] [2023-08-30 04:05:00,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795187889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:05:00,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:05:00,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:05:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351668091] [2023-08-30 04:05:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:05:00,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:05:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:05:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:05:00,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 329 [2023-08-30 04:05:00,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 83 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:00,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:00,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 329 [2023-08-30 04:05:00,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:03,728 INFO L130 PetriNetUnfolder]: 24490/37484 cut-off events. [2023-08-30 04:05:03,729 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2023-08-30 04:05:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72706 conditions, 37484 events. 24490/37484 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 284578 event pairs, 21143 based on Foata normal form. 9044/40141 useless extension candidates. Maximal degree in co-relation 14199. Up to 34655 conditions per place. [2023-08-30 04:05:03,906 INFO L137 encePairwiseOnDemand]: 303/329 looper letters, 51 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2023-08-30 04:05:03,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 282 flow [2023-08-30 04:05:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:05:03,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:05:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-30 04:05:03,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542046605876393 [2023-08-30 04:05:03,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-30 04:05:03,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-30 04:05:03,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:03,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-30 04:05:03,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:03,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:03,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:03,913 INFO L175 Difference]: Start difference. First operand has 65 places, 83 transitions, 196 flow. Second operand 3 states and 547 transitions. [2023-08-30 04:05:03,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 282 flow [2023-08-30 04:05:03,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:05:03,919 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 166 flow [2023-08-30 04:05:03,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-30 04:05:03,920 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:05:03,920 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 166 flow [2023-08-30 04:05:03,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:03,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:03,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:05:03,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:05:03,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:03,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 37451, now seen corresponding path program 1 times [2023-08-30 04:05:03,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:03,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555471683] [2023-08-30 04:05:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:03,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:03,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555471683] [2023-08-30 04:05:03,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555471683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:05:03,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:05:03,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:05:03,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135137440] [2023-08-30 04:05:03,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:05:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:05:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:05:03,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:05:03,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-30 04:05:03,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:03,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:03,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-30 04:05:03,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:05,684 INFO L130 PetriNetUnfolder]: 19018/28949 cut-off events. [2023-08-30 04:05:05,684 INFO L131 PetriNetUnfolder]: For 1716/1716 co-relation queries the response was YES. [2023-08-30 04:05:05,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58450 conditions, 28949 events. 19018/28949 cut-off events. For 1716/1716 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 211850 event pairs, 16947 based on Foata normal form. 0/25413 useless extension candidates. Maximal degree in co-relation 58388. Up to 24777 conditions per place. [2023-08-30 04:05:05,871 INFO L137 encePairwiseOnDemand]: 325/329 looper letters, 61 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 04:05:05,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 328 flow [2023-08-30 04:05:05,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:05:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:05:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 04:05:05,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-08-30 04:05:05,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 04:05:05,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 04:05:05,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:05,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 04:05:05,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:05,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:05,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:05,877 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 166 flow. Second operand 3 states and 517 transitions. [2023-08-30 04:05:05,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 328 flow [2023-08-30 04:05:05,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:05:05,881 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 164 flow [2023-08-30 04:05:05,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-30 04:05:05,883 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-30 04:05:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 164 flow [2023-08-30 04:05:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:05,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:05,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:05:05,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:05:05,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:05,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 258524690, now seen corresponding path program 1 times [2023-08-30 04:05:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:05,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300287179] [2023-08-30 04:05:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:05,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:05,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300287179] [2023-08-30 04:05:05,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300287179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:05:05,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139399300] [2023-08-30 04:05:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:05,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:05:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:05:05,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:05:05,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 04:05:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:05:06,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:05:06,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:05:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:06,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:05:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:06,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139399300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:05:06,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:05:06,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:05:06,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847119659] [2023-08-30 04:05:06,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:05:06,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:05:06,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:05:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:05:06,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-30 04:05:06,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:06,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:06,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-30 04:05:06,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:07,888 INFO L130 PetriNetUnfolder]: 18108/26752 cut-off events. [2023-08-30 04:05:07,889 INFO L131 PetriNetUnfolder]: For 2272/2272 co-relation queries the response was YES. [2023-08-30 04:05:07,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56523 conditions, 26752 events. 18108/26752 cut-off events. For 2272/2272 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 190323 event pairs, 26 based on Foata normal form. 7/25031 useless extension candidates. Maximal degree in co-relation 51408. Up to 20037 conditions per place. [2023-08-30 04:05:08,046 INFO L137 encePairwiseOnDemand]: 323/329 looper letters, 114 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2023-08-30 04:05:08,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 136 transitions, 570 flow [2023-08-30 04:05:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:05:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:05:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2023-08-30 04:05:08,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522289766970618 [2023-08-30 04:05:08,053 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2023-08-30 04:05:08,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2023-08-30 04:05:08,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:08,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2023-08-30 04:05:08,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:08,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:08,061 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:08,061 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 164 flow. Second operand 6 states and 1031 transitions. [2023-08-30 04:05:08,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 136 transitions, 570 flow [2023-08-30 04:05:08,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 136 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:05:08,179 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 180 flow [2023-08-30 04:05:08,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-08-30 04:05:08,180 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:05:08,180 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 180 flow [2023-08-30 04:05:08,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.71428571428572) internal successors, (1069), 7 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:08,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:08,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:05:08,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:05:08,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:05:08,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:08,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1315385223, now seen corresponding path program 1 times [2023-08-30 04:05:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:08,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419624329] [2023-08-30 04:05:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:05:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:08,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419624329] [2023-08-30 04:05:08,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419624329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:05:08,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390337914] [2023-08-30 04:05:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:08,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:05:08,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:05:08,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:05:08,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 04:05:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:08,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:05:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:05:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:08,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:05:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390337914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:05:08,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:05:08,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 04:05:08,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018702526] [2023-08-30 04:05:08,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:05:08,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:05:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:05:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:05:08,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 329 [2023-08-30 04:05:08,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 180 flow. Second operand has 12 states, 12 states have (on average 147.33333333333334) internal successors, (1768), 12 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:08,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:08,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 329 [2023-08-30 04:05:08,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:09,321 INFO L130 PetriNetUnfolder]: 3352/5864 cut-off events. [2023-08-30 04:05:09,321 INFO L131 PetriNetUnfolder]: For 3831/3831 co-relation queries the response was YES. [2023-08-30 04:05:09,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13255 conditions, 5864 events. 3352/5864 cut-off events. For 3831/3831 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 40657 event pairs, 355 based on Foata normal form. 504/6176 useless extension candidates. Maximal degree in co-relation 1516. Up to 3178 conditions per place. [2023-08-30 04:05:09,340 INFO L137 encePairwiseOnDemand]: 325/329 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 04:05:09,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 353 flow [2023-08-30 04:05:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:05:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:05:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 945 transitions. [2023-08-30 04:05:09,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787234042553192 [2023-08-30 04:05:09,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 945 transitions. [2023-08-30 04:05:09,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 945 transitions. [2023-08-30 04:05:09,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:09,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 945 transitions. [2023-08-30 04:05:09,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.5) internal successors, (945), 6 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:09,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:09,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 329.0) internal successors, (2303), 7 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:09,350 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 180 flow. Second operand 6 states and 945 transitions. [2023-08-30 04:05:09,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 353 flow [2023-08-30 04:05:09,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 336 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 04:05:09,354 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 116 flow [2023-08-30 04:05:09,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-30 04:05:09,355 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-08-30 04:05:09,355 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 116 flow [2023-08-30 04:05:09,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.33333333333334) internal successors, (1768), 12 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:09,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:09,356 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:05:09,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:05:09,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:05:09,561 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:09,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2124429100, now seen corresponding path program 1 times [2023-08-30 04:05:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638984264] [2023-08-30 04:05:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:05:09,580 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:05:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:05:09,602 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:05:09,602 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:05:09,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:05:09,602 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:05:09,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:05:09,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:05:09,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:05:09,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:05:09,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:05:09,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:05:09,604 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:05:09,605 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:05:09,605 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:05:09,628 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:05:09,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-30 04:05:09,707 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-30 04:05:09,707 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:05:09,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 668 events. 96/668 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2725 event pairs, 6 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-30 04:05:09,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 482 flow [2023-08-30 04:05:09,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 482 flow [2023-08-30 04:05:09,717 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:05:09,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-30 04:05:09,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-30 04:05:09,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-30 04:05:09,787 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-30 04:05:09,787 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:05:09,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 668 events. 96/668 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2725 event pairs, 6 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 455. Up to 32 conditions per place. [2023-08-30 04:05:09,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-30 04:05:12,900 INFO L134 LiptonReduction]: Checked pairs total: 62137 [2023-08-30 04:05:12,900 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 04:05:12,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:05:12,902 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;@7c53642, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:05:12,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:05:12,903 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:05:12,903 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:05:12,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:12,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:05:12,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:12,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 50480, now seen corresponding path program 1 times [2023-08-30 04:05:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:12,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376633164] [2023-08-30 04:05:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:12,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:12,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376633164] [2023-08-30 04:05:12,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376633164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:05:12,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:05:12,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:05:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235360869] [2023-08-30 04:05:12,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:05:12,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:05:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:05:12,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:05:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-30 04:05:12,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:12,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:12,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-30 04:05:12,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:46,349 INFO L130 PetriNetUnfolder]: 378216/519899 cut-off events. [2023-08-30 04:05:46,349 INFO L131 PetriNetUnfolder]: For 14786/14786 co-relation queries the response was YES. [2023-08-30 04:05:47,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020299 conditions, 519899 events. 378216/519899 cut-off events. For 14786/14786 co-relation queries the response was YES. Maximal size of possible extension queue 11312. Compared 4151004 event pairs, 313434 based on Foata normal form. 84825/545140 useless extension candidates. Maximal degree in co-relation 88278. Up to 416893 conditions per place. [2023-08-30 04:05:48,990 INFO L137 encePairwiseOnDemand]: 346/377 looper letters, 84 selfloop transitions, 2 changer transitions 1/103 dead transitions. [2023-08-30 04:05:48,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 424 flow [2023-08-30 04:05:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:05:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:05:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-30 04:05:48,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817860300618921 [2023-08-30 04:05:48,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-30 04:05:48,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-30 04:05:48,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:48,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-30 04:05:48,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.33333333333334) internal successors, (658), 3 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:48,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:48,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:48,997 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 658 transitions. [2023-08-30 04:05:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 424 flow [2023-08-30 04:05:49,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:05:49,004 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 190 flow [2023-08-30 04:05:49,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-08-30 04:05:49,005 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:05:49,005 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 190 flow [2023-08-30 04:05:49,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:49,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:49,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:05:49,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:05:49,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:05:49,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:49,006 INFO L85 PathProgramCache]: Analyzing trace with hash 50479, now seen corresponding path program 1 times [2023-08-30 04:05:49,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:49,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739284650] [2023-08-30 04:05:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:49,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:05:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739284650] [2023-08-30 04:05:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739284650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:05:49,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:05:49,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:05:49,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291818626] [2023-08-30 04:05:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:05:49,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:05:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:05:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:05:49,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-30 04:05:49,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:05:49,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:49,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-30 04:05:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:06:18,315 INFO L130 PetriNetUnfolder]: 349616/484651 cut-off events. [2023-08-30 04:06:18,315 INFO L131 PetriNetUnfolder]: For 21616/21616 co-relation queries the response was YES. [2023-08-30 04:06:19,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956456 conditions, 484651 events. 349616/484651 cut-off events. For 21616/21616 co-relation queries the response was YES. Maximal size of possible extension queue 10660. Compared 3865341 event pairs, 252826 based on Foata normal form. 0/444613 useless extension candidates. Maximal degree in co-relation 870272. Up to 454475 conditions per place. [2023-08-30 04:06:20,637 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 72 selfloop transitions, 3 changer transitions 1/92 dead transitions. [2023-08-30 04:06:20,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 386 flow [2023-08-30 04:06:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:06:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:06:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 04:06:20,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349248452696729 [2023-08-30 04:06:20,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 04:06:20,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 04:06:20,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:06:20,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 04:06:20,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:20,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:20,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:20,643 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 190 flow. Second operand 3 states and 605 transitions. [2023-08-30 04:06:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 386 flow [2023-08-30 04:06:26,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:06:26,232 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 205 flow [2023-08-30 04:06:26,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-08-30 04:06:26,232 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:06:26,233 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 205 flow [2023-08-30 04:06:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:26,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:06:26,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:06:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:06:26,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:06:26,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:06:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash 48603595, now seen corresponding path program 1 times [2023-08-30 04:06:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:06:26,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790105283] [2023-08-30 04:06:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:06:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:06:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:06:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:06:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:06:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790105283] [2023-08-30 04:06:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790105283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:06:26,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:06:26,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:06:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701111465] [2023-08-30 04:06:26,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:06:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:06:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:06:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:06:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:06:26,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 377 [2023-08-30 04:06:26,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:26,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:06:26,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 377 [2023-08-30 04:06:26,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:06:56,604 INFO L130 PetriNetUnfolder]: 349614/484640 cut-off events. [2023-08-30 04:06:56,604 INFO L131 PetriNetUnfolder]: For 34459/34459 co-relation queries the response was YES. [2023-08-30 04:06:57,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969583 conditions, 484640 events. 349614/484640 cut-off events. For 34459/34459 co-relation queries the response was YES. Maximal size of possible extension queue 10660. Compared 3864638 event pairs, 252826 based on Foata normal form. 0/451176 useless extension candidates. Maximal degree in co-relation 117974. Up to 454474 conditions per place. [2023-08-30 04:06:59,182 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 63 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 04:06:59,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 348 flow [2023-08-30 04:06:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:06:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:06:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-30 04:06:59,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-30 04:06:59,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-30 04:06:59,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-30 04:06:59,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:06:59,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-30 04:06:59,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:59,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:59,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:59,189 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 205 flow. Second operand 3 states and 598 transitions. [2023-08-30 04:06:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 348 flow [2023-08-30 04:06:59,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 344 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:06:59,368 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 206 flow [2023-08-30 04:06:59,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-08-30 04:06:59,369 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-30 04:06:59,369 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 206 flow [2023-08-30 04:06:59,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:59,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:06:59,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:06:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:06:59,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:06:59,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:06:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash -584705603, now seen corresponding path program 1 times [2023-08-30 04:06:59,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:06:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032659705] [2023-08-30 04:06:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:06:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:06:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:06:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:06:59,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:06:59,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032659705] [2023-08-30 04:06:59,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032659705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:06:59,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471740887] [2023-08-30 04:06:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:06:59,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:06:59,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:06:59,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:06:59,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 04:06:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:06:59,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:06:59,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:06:59,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:06:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:06:59,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:06:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:06:59,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471740887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:06:59,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:06:59,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:06:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310219043] [2023-08-30 04:06:59,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:06:59,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:06:59,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:06:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:06:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:06:59,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-30 04:06:59,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 174.875) internal successors, (1399), 8 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:06:59,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:06:59,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-30 04:06:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:07:26,926 INFO L130 PetriNetUnfolder]: 355314/471647 cut-off events. [2023-08-30 04:07:26,926 INFO L131 PetriNetUnfolder]: For 18960/18960 co-relation queries the response was YES. [2023-08-30 04:07:27,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970048 conditions, 471647 events. 355314/471647 cut-off events. For 18960/18960 co-relation queries the response was YES. Maximal size of possible extension queue 10140. Compared 3526147 event pairs, 6977 based on Foata normal form. 747/439242 useless extension candidates. Maximal degree in co-relation 863605. Up to 380774 conditions per place. [2023-08-30 04:07:29,613 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 161 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2023-08-30 04:07:29,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 185 transitions, 797 flow [2023-08-30 04:07:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:07:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:07:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1212 transitions. [2023-08-30 04:07:29,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358090185676393 [2023-08-30 04:07:29,616 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1212 transitions. [2023-08-30 04:07:29,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1212 transitions. [2023-08-30 04:07:29,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:07:29,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1212 transitions. [2023-08-30 04:07:29,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:07:29,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:07:29,623 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:07:29,623 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 206 flow. Second operand 6 states and 1212 transitions. [2023-08-30 04:07:29,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 185 transitions, 797 flow [2023-08-30 04:07:29,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 185 transitions, 793 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:07:29,644 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 260 flow [2023-08-30 04:07:29,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-08-30 04:07:29,645 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2023-08-30 04:07:29,645 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 260 flow [2023-08-30 04:07:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 174.875) internal successors, (1399), 8 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:07:29,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:07:29,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:07:29,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:07:29,846 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,SelfDestructingSolverStorable16 [2023-08-30 04:07:29,846 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:07:29,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:07:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1102572154, now seen corresponding path program 1 times [2023-08-30 04:07:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:07:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099881487] [2023-08-30 04:07:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:07:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:07:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:07:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:07:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:07:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099881487] [2023-08-30 04:07:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099881487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:07:29,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:07:29,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:07:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953104963] [2023-08-30 04:07:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:07:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:07:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:07:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:07:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:07:29,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 377 [2023-08-30 04:07:29,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:07:29,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:07:29,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 377 [2023-08-30 04:07:29,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:02,407 INFO L130 PetriNetUnfolder]: 311412/429153 cut-off events. [2023-08-30 04:08:02,407 INFO L131 PetriNetUnfolder]: For 153900/153900 co-relation queries the response was YES. [2023-08-30 04:08:03,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934284 conditions, 429153 events. 311412/429153 cut-off events. For 153900/153900 co-relation queries the response was YES. Maximal size of possible extension queue 9324. Compared 3353616 event pairs, 243561 based on Foata normal form. 6561/414880 useless extension candidates. Maximal degree in co-relation 300914. Up to 319834 conditions per place. [2023-08-30 04:08:04,998 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 122 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2023-08-30 04:08:04,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 145 transitions, 666 flow [2023-08-30 04:08:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:08:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:08:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-08-30 04:08:05,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444297082228117 [2023-08-30 04:08:05,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-08-30 04:08:05,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-08-30 04:08:05,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:05,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-08-30 04:08:05,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:05,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:05,006 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:05,006 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 260 flow. Second operand 4 states and 821 transitions. [2023-08-30 04:08:05,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 145 transitions, 666 flow [2023-08-30 04:08:05,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 145 transitions, 658 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 04:08:05,434 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 275 flow [2023-08-30 04:08:05,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=90, PETRI_TRANSITIONS=78} [2023-08-30 04:08:05,434 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2023-08-30 04:08:05,435 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 275 flow [2023-08-30 04:08:05,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:05,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:05,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:05,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:08:05,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:08:05,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1102573136, now seen corresponding path program 1 times [2023-08-30 04:08:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:05,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219804927] [2023-08-30 04:08:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:08:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219804927] [2023-08-30 04:08:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219804927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:05,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:05,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650100856] [2023-08-30 04:08:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:05,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 377 [2023-08-30 04:08:05,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 78 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:05,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:05,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 377 [2023-08-30 04:08:05,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:36,720 INFO L130 PetriNetUnfolder]: 349445/473802 cut-off events. [2023-08-30 04:08:36,720 INFO L131 PetriNetUnfolder]: For 196607/196607 co-relation queries the response was YES. [2023-08-30 04:08:37,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055379 conditions, 473802 events. 349445/473802 cut-off events. For 196607/196607 co-relation queries the response was YES. Maximal size of possible extension queue 9881. Compared 3542850 event pairs, 171009 based on Foata normal form. 0/458822 useless extension candidates. Maximal degree in co-relation 968186. Up to 451014 conditions per place. [2023-08-30 04:08:39,777 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 88 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-30 04:08:39,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 108 transitions, 587 flow [2023-08-30 04:08:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-30 04:08:39,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296198054818745 [2023-08-30 04:08:39,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-30 04:08:39,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-30 04:08:39,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:39,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-30 04:08:39,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,784 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 275 flow. Second operand 3 states and 599 transitions. [2023-08-30 04:08:39,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 108 transitions, 587 flow [2023-08-30 04:08:41,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 583 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:08:41,799 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 304 flow [2023-08-30 04:08:41,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-08-30 04:08:41,800 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2023-08-30 04:08:41,800 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 304 flow [2023-08-30 04:08:41,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:41,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:41,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:41,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 04:08:41,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:08:41,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:41,802 INFO L85 PathProgramCache]: Analyzing trace with hash -878572026, now seen corresponding path program 1 times [2023-08-30 04:08:41,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:41,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307536962] [2023-08-30 04:08:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:41,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:41,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307536962] [2023-08-30 04:08:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307536962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:08:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524207648] [2023-08-30 04:08:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:41,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:08:41,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:08:41,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 04:08:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:08:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:08:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:41,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:08:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:42,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524207648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:08:42,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:08:42,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 04:08:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602401430] [2023-08-30 04:08:42,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:08:42,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:08:42,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:08:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:08:42,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-30 04:08:42,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 304 flow. Second operand has 8 states, 8 states have (on average 178.875) internal successors, (1431), 8 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:42,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:42,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-30 04:08:42,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:49,646 INFO L130 PetriNetUnfolder]: 82402/116478 cut-off events. [2023-08-30 04:08:49,647 INFO L131 PetriNetUnfolder]: For 94839/94839 co-relation queries the response was YES. [2023-08-30 04:08:49,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312202 conditions, 116478 events. 82402/116478 cut-off events. For 94839/94839 co-relation queries the response was YES. Maximal size of possible extension queue 3075. Compared 866120 event pairs, 1684 based on Foata normal form. 6561/123037 useless extension candidates. Maximal degree in co-relation 312187. Up to 79461 conditions per place. [2023-08-30 04:08:50,370 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 132 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2023-08-30 04:08:50,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 152 transitions, 724 flow [2023-08-30 04:08:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:08:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:08:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1362 transitions. [2023-08-30 04:08:50,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161045850701023 [2023-08-30 04:08:50,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1362 transitions. [2023-08-30 04:08:50,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1362 transitions. [2023-08-30 04:08:50,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:50,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1362 transitions. [2023-08-30 04:08:50,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 194.57142857142858) internal successors, (1362), 7 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:50,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:50,380 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:50,381 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 304 flow. Second operand 7 states and 1362 transitions. [2023-08-30 04:08:50,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 152 transitions, 724 flow [2023-08-30 04:08:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 152 transitions, 695 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 04:08:50,507 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 207 flow [2023-08-30 04:08:50,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=83, PETRI_TRANSITIONS=62} [2023-08-30 04:08:50,507 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2023-08-30 04:08:50,508 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 207 flow [2023-08-30 04:08:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.875) internal successors, (1431), 8 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:50,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:50,508 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:50,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 04:08:50,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:50,713 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:08:50,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1371777441, now seen corresponding path program 1 times [2023-08-30 04:08:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:50,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003531865] [2023-08-30 04:08:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:50,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:50,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:50,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003531865] [2023-08-30 04:08:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003531865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:50,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 04:08:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363526376] [2023-08-30 04:08:50,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:08:50,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:08:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:08:50,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 377 [2023-08-30 04:08:50,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 62 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:50,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:50,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 377 [2023-08-30 04:08:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:56,922 INFO L130 PetriNetUnfolder]: 61747/90328 cut-off events. [2023-08-30 04:08:56,923 INFO L131 PetriNetUnfolder]: For 66151/66151 co-relation queries the response was YES. [2023-08-30 04:08:57,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220718 conditions, 90328 events. 61747/90328 cut-off events. For 66151/66151 co-relation queries the response was YES. Maximal size of possible extension queue 2448. Compared 687952 event pairs, 0 based on Foata normal form. 5832/96159 useless extension candidates. Maximal degree in co-relation 220704. Up to 52974 conditions per place. [2023-08-30 04:08:57,736 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 131 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2023-08-30 04:08:57,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 693 flow [2023-08-30 04:08:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:08:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:08:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1349 transitions. [2023-08-30 04:08:57,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511178476695718 [2023-08-30 04:08:57,740 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1349 transitions. [2023-08-30 04:08:57,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1349 transitions. [2023-08-30 04:08:57,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:57,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1349 transitions. [2023-08-30 04:08:57,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 192.71428571428572) internal successors, (1349), 7 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:57,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:57,746 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:57,747 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 207 flow. Second operand 7 states and 1349 transitions. [2023-08-30 04:08:57,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 693 flow [2023-08-30 04:08:57,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 151 transitions, 674 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 04:08:57,784 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 188 flow [2023-08-30 04:08:57,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2023-08-30 04:08:57,785 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2023-08-30 04:08:57,785 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 188 flow [2023-08-30 04:08:57,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 177.0) internal successors, (1239), 7 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:57,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:57,785 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:57,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 04:08:57,785 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:08:57,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash -424570937, now seen corresponding path program 1 times [2023-08-30 04:08:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:57,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608176842] [2023-08-30 04:08:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:57,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:57,798 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:08:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:57,810 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:08:57,810 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:08:57,811 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:08:57,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:08:57,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:08:57,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:08:57,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:08:57,811 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:08:57,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:08:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 04:08:57,812 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:57,812 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:08:57,813 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:08:57,831 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:08:57,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:57,940 INFO L130 PetriNetUnfolder]: 158/1073 cut-off events. [2023-08-30 04:08:57,940 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:08:57,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 1073 events. 158/1073 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5216 event pairs, 23 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 713. Up to 80 conditions per place. [2023-08-30 04:08:57,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:57,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:57,959 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:08:57,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:57,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:57,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:58,070 INFO L130 PetriNetUnfolder]: 158/1073 cut-off events. [2023-08-30 04:08:58,071 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:08:58,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 1073 events. 158/1073 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5216 event pairs, 23 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 713. Up to 80 conditions per place. [2023-08-30 04:08:58,108 INFO L119 LiptonReduction]: Number of co-enabled transitions 33880 [2023-08-30 04:09:01,056 INFO L134 LiptonReduction]: Checked pairs total: 103475 [2023-08-30 04:09:01,056 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-30 04:09:01,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:09:01,058 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;@7c53642, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:09:01,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:09:01,058 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:09:01,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:09:01,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:01,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:01,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-30 04:09:01,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash 64881, now seen corresponding path program 1 times [2023-08-30 04:09:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22419153] [2023-08-30 04:09:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:09:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:01,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22419153] [2023-08-30 04:09:01,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22419153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:01,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090799956] [2023-08-30 04:09:01,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:01,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:01,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:01,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 419 [2023-08-30 04:09:01,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 121 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:01,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:01,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 419 [2023-08-30 04:09:01,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand