./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.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_07-cond_racing2.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 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef --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 04:04:20,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:04:20,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:04:20,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:04:20,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:04:20,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:04:20,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:04:20,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:04:20,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:04:20,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:04:20,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:04:20,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:04:20,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:04:20,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:04:20,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:04:20,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:04:20,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:04:20,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:04:20,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:04:20,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:04:20,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:04:20,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:04:20,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:04:20,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:04:20,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:04:20,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:04:20,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:04:20,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:04:20,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:04:20,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:04:20,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:04:20,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:04:20,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:04:20,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:04:20,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:04:20,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:04:20,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:04:20,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:04:20,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:04:20,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:04:20,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:04:20,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:04:20,989 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:04:20,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:04:20,990 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:04:20,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:04:20,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:04:20,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:04:20,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:04:20,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:04:20,993 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:04:20,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:04:20,993 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:04:20,993 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:04:20,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:04:20,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:04:20,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:04:20,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:04:20,994 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:04:20,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:04:20,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:04:20,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:04:20,995 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:04:20,995 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:04:20,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:04:20,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:04:20,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:04:20,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:04:20,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:04:20,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:04:20,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:04:20,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:04:20,996 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:04:20,996 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:04:20,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:04:20,997 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:04:20,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45d1947e02656e790dafd6ca03f6eadb14d0b370e2217b75740af9998d975bef Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:04:21,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:04:21,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:04:21,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:04:21,274 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:04:21,275 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:04:21,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-30 04:04:22,426 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:04:22,644 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:04:22,644 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_07-cond_racing2.i [2023-08-30 04:04:22,657 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7217f1929/d61c5306d27748719d0f7e68c34b359a/FLAG34b963bec [2023-08-30 04:04:22,671 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7217f1929/d61c5306d27748719d0f7e68c34b359a [2023-08-30 04:04:22,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:04:22,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:04:22,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:04:22,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:04:22,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:04:22,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:04:22" (1/1) ... [2023-08-30 04:04:22,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc21a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:22, skipping insertion in model container [2023-08-30 04:04:22,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:04:22" (1/1) ... [2023-08-30 04:04:22,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:04:22,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:04:22,995 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_07-cond_racing2.i[41322,41335] [2023-08-30 04:04:23,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:04:23,034 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:04:23,064 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_07-cond_racing2.i[41322,41335] [2023-08-30 04:04:23,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:04:23,145 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:04:23,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23 WrapperNode [2023-08-30 04:04:23,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:04:23,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:04:23,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:04:23,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:04:23,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,205 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-08-30 04:04:23,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:04:23,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:04:23,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:04:23,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:04:23,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:04:23,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:04:23,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:04:23,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:04:23,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (1/1) ... [2023-08-30 04:04:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:04:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:23,319 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 04:04:23,366 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 04:04:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:04:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:04:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:04:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:04:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:04:23,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:04:23,382 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:04:23,382 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:04:23,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:04:23,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:04:23,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:04:23,383 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 04:04:23,515 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:04:23,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:04:23,712 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:04:23,717 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:04:23,718 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-30 04:04:23,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:04:23 BoogieIcfgContainer [2023-08-30 04:04:23,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:04:23,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:04:23,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:04:23,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:04:23,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:04:22" (1/3) ... [2023-08-30 04:04:23,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc92685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:04:23, skipping insertion in model container [2023-08-30 04:04:23,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:04:23" (2/3) ... [2023-08-30 04:04:23,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc92685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:04:23, skipping insertion in model container [2023-08-30 04:04:23,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:04:23" (3/3) ... [2023-08-30 04:04:23,739 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_07-cond_racing2.i [2023-08-30 04:04:23,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:04:23,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:04:23,751 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:04:23,805 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:04:23,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:23,872 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-30 04:04:23,873 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:04:23,877 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 04:04:23,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:23,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:23,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:23,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:23,890 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:23,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 129 transitions, 266 flow [2023-08-30 04:04:23,919 INFO L130 PetriNetUnfolder]: 23/178 cut-off events. [2023-08-30 04:04:23,919 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:04:23,921 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 04:04:23,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 3080 [2023-08-30 04:04:26,693 INFO L134 LiptonReduction]: Checked pairs total: 5768 [2023-08-30 04:04:26,694 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-30 04:04:26,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:26,721 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;@5de8a83b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:26,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:26,738 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:04:26,738 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:26,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:26,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:26,740 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 04:04:26,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash 15832, now seen corresponding path program 1 times [2023-08-30 04:04:26,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:26,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775740362] [2023-08-30 04:04:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:27,073 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 04:04:27,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775740362] [2023-08-30 04:04:27,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775740362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:27,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:27,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:27,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948725654] [2023-08-30 04:04:27,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:27,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:27,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:27,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:27,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 243 [2023-08-30 04:04:27,127 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 04:04:27,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:27,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 243 [2023-08-30 04:04:27,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:27,214 INFO L130 PetriNetUnfolder]: 131/295 cut-off events. [2023-08-30 04:04:27,215 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:04:27,215 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 04:04:27,217 INFO L137 encePairwiseOnDemand]: 229/243 looper letters, 32 selfloop transitions, 2 changer transitions 2/38 dead transitions. [2023-08-30 04:04:27,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 156 flow [2023-08-30 04:04:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-30 04:04:27,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130315500685871 [2023-08-30 04:04:27,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-30 04:04:27,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-30 04:04:27,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:27,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-30 04:04:27,235 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 04:04:27,239 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 04:04:27,239 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 04:04:27,241 INFO L175 Difference]: Start difference. First operand has 33 places, 41 transitions, 90 flow. Second operand 3 states and 374 transitions. [2023-08-30 04:04:27,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 156 flow [2023-08-30 04:04:27,243 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 04:04:27,245 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 68 flow [2023-08-30 04:04:27,246 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 04:04:27,249 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2023-08-30 04:04:27,249 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 68 flow [2023-08-30 04:04:27,249 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 04:04:27,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:27,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:04:27,250 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 04:04:27,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 15830, now seen corresponding path program 1 times [2023-08-30 04:04:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532072054] [2023-08-30 04:04:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:27,332 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 04:04:27,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532072054] [2023-08-30 04:04:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532072054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:27,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:27,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49434867] [2023-08-30 04:04:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:27,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:27,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:27,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 243 [2023-08-30 04:04:27,362 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 04:04:27,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:27,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 243 [2023-08-30 04:04:27,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:27,429 INFO L130 PetriNetUnfolder]: 113/249 cut-off events. [2023-08-30 04:04:27,429 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 04:04:27,430 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 04:04:27,431 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 33 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-30 04:04:27,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 156 flow [2023-08-30 04:04:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-30 04:04:27,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50480109739369 [2023-08-30 04:04:27,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-30 04:04:27,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-30 04:04:27,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:27,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-30 04:04:27,438 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 04:04:27,440 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 04:04:27,441 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 04:04:27,441 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 68 flow. Second operand 3 states and 368 transitions. [2023-08-30 04:04:27,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 156 flow [2023-08-30 04:04:27,442 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 04:04:27,442 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-08-30 04:04:27,443 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 04:04:27,444 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-30 04:04:27,444 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-08-30 04:04:27,444 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 04:04:27,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:27,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:04:27,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:04:27,445 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 04:04:27,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash 471973036, now seen corresponding path program 1 times [2023-08-30 04:04:27,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:27,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046915835] [2023-08-30 04:04:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:27,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:27,527 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 04:04:27,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046915835] [2023-08-30 04:04:27,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046915835] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:27,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092302044] [2023-08-30 04:04:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:27,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:27,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:27,531 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 04:04:27,558 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 04:04:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:27,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:04:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:27,673 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 04:04:27,730 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 04:04:27,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:27,773 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 04:04:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092302044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:27,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:27,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:04:27,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524706478] [2023-08-30 04:04:27,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:27,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:04:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:04:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:04:27,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 243 [2023-08-30 04:04:27,851 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 04:04:27,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:27,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 243 [2023-08-30 04:04:27,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:27,892 INFO L130 PetriNetUnfolder]: 16/48 cut-off events. [2023-08-30 04:04:27,892 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-08-30 04:04:27,893 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 04:04:27,893 INFO L137 encePairwiseOnDemand]: 238/243 looper letters, 19 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-30 04:04:27,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 99 flow [2023-08-30 04:04:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:04:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:04:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 448 transitions. [2023-08-30 04:04:27,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2023-08-30 04:04:27,894 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 448 transitions. [2023-08-30 04:04:27,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 448 transitions. [2023-08-30 04:04:27,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:27,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 448 transitions. [2023-08-30 04:04:27,896 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 04:04:27,897 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 04:04:27,897 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 04:04:27,898 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 4 states and 448 transitions. [2023-08-30 04:04:27,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 99 flow [2023-08-30 04:04:27,898 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 04:04:27,898 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 37 flow [2023-08-30 04:04:27,912 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 04:04:27,913 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -13 predicate places. [2023-08-30 04:04:27,913 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 37 flow [2023-08-30 04:04:27,914 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 04:04:27,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:27,914 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:04:27,936 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 04:04:28,119 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 04:04:28,119 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 04:04:28,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1746262609, now seen corresponding path program 1 times [2023-08-30 04:04:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:28,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530104506] [2023-08-30 04:04:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:28,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:28,142 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:04:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:28,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:04:28,168 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:04:28,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:04:28,170 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:04:28,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:04:28,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:04:28,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:04:28,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:04:28,171 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:04:28,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:04:28,172 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:04:28,185 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:04:28,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:04:28,197 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:04:28,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:28,215 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-30 04:04:28,215 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:04:28,216 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 04:04:28,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:28,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:28,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:28,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:28,218 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:28,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 159 transitions, 336 flow [2023-08-30 04:04:28,244 INFO L130 PetriNetUnfolder]: 40/286 cut-off events. [2023-08-30 04:04:28,244 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:04:28,245 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 04:04:28,249 INFO L119 LiptonReduction]: Number of co-enabled transitions 8344 [2023-08-30 04:04:31,110 INFO L134 LiptonReduction]: Checked pairs total: 19105 [2023-08-30 04:04:31,111 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-30 04:04:31,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:31,113 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;@5de8a83b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:31,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:31,115 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:04:31,115 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:31,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:31,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:31,116 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 04:04:31,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash 25975, now seen corresponding path program 1 times [2023-08-30 04:04:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:31,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077805726] [2023-08-30 04:04:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:31,142 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 04:04:31,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:31,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077805726] [2023-08-30 04:04:31,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077805726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:31,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:31,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:31,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013681500] [2023-08-30 04:04:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:31,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:31,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 287 [2023-08-30 04:04:31,165 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 04:04:31,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:31,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 287 [2023-08-30 04:04:31,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:31,416 INFO L130 PetriNetUnfolder]: 1812/3286 cut-off events. [2023-08-30 04:04:31,416 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-30 04:04:31,419 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 04:04:31,427 INFO L137 encePairwiseOnDemand]: 268/287 looper letters, 46 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2023-08-30 04:04:31,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 236 flow [2023-08-30 04:04:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-30 04:04:31,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5389082462253194 [2023-08-30 04:04:31,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-30 04:04:31,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-30 04:04:31,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:31,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-30 04:04:31,430 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 04:04:31,431 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 04:04:31,432 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 04:04:31,432 INFO L175 Difference]: Start difference. First operand has 50 places, 62 transitions, 142 flow. Second operand 3 states and 464 transitions. [2023-08-30 04:04:31,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 236 flow [2023-08-30 04:04:31,433 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 04:04:31,434 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 112 flow [2023-08-30 04:04:31,434 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 04:04:31,434 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-30 04:04:31,435 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 112 flow [2023-08-30 04:04:31,435 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 04:04:31,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:31,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:31,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:04:31,435 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 04:04:31,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash 25976, now seen corresponding path program 1 times [2023-08-30 04:04:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:31,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104838648] [2023-08-30 04:04:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:31,466 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 04:04:31,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104838648] [2023-08-30 04:04:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104838648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:31,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:31,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:31,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410032209] [2023-08-30 04:04:31,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:31,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:31,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:31,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:31,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 287 [2023-08-30 04:04:31,495 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 04:04:31,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:31,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 287 [2023-08-30 04:04:31,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:31,703 INFO L130 PetriNetUnfolder]: 1686/3000 cut-off events. [2023-08-30 04:04:31,703 INFO L131 PetriNetUnfolder]: For 95/95 co-relation queries the response was YES. [2023-08-30 04:04:31,705 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 04:04:31,712 INFO L137 encePairwiseOnDemand]: 282/287 looper letters, 40 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-30 04:04:31,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 212 flow [2023-08-30 04:04:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-30 04:04:31,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2023-08-30 04:04:31,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-30 04:04:31,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-30 04:04:31,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:31,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-30 04:04:31,716 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 04:04:31,717 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 04:04:31,717 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 04:04:31,717 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 112 flow. Second operand 3 states and 441 transitions. [2023-08-30 04:04:31,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 212 flow [2023-08-30 04:04:31,719 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 04:04:31,719 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 124 flow [2023-08-30 04:04:31,719 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 04:04:31,720 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-30 04:04:31,720 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 124 flow [2023-08-30 04:04:31,720 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 04:04:31,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:31,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:04:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:04:31,721 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 04:04:31,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1759538357, now seen corresponding path program 1 times [2023-08-30 04:04:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122355497] [2023-08-30 04:04:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:31,768 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 04:04:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122355497] [2023-08-30 04:04:31,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122355497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113480703] [2023-08-30 04:04:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:31,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:31,771 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 04:04:31,804 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 04:04:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:31,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:04:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:31,838 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 04:04:31,862 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 04:04:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:31,893 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 04:04:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113480703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:31,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:31,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:04:31,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137738147] [2023-08-30 04:04:31,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:31,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:04:31,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:04:31,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:04:31,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 287 [2023-08-30 04:04:31,976 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 04:04:31,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:31,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 287 [2023-08-30 04:04:31,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:32,202 INFO L130 PetriNetUnfolder]: 1520/2596 cut-off events. [2023-08-30 04:04:32,202 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-30 04:04:32,205 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 04:04:32,213 INFO L137 encePairwiseOnDemand]: 281/287 looper letters, 66 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-30 04:04:32,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 332 flow [2023-08-30 04:04:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:04:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:04:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 719 transitions. [2023-08-30 04:04:32,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010452961672474 [2023-08-30 04:04:32,215 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 719 transitions. [2023-08-30 04:04:32,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 719 transitions. [2023-08-30 04:04:32,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:32,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 719 transitions. [2023-08-30 04:04:32,217 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 04:04:32,218 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 04:04:32,219 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 04:04:32,219 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 124 flow. Second operand 5 states and 719 transitions. [2023-08-30 04:04:32,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 332 flow [2023-08-30 04:04:32,220 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 04:04:32,220 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 132 flow [2023-08-30 04:04:32,221 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 04:04:32,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-30 04:04:32,221 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 132 flow [2023-08-30 04:04:32,221 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 04:04:32,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:32,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:04:32,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 04:04:32,426 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 04:04:32,427 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 04:04:32,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2092667315, now seen corresponding path program 1 times [2023-08-30 04:04:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:32,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698788833] [2023-08-30 04:04:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:32,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:04:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:32,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:04:32,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:04:32,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:04:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:04:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:04:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:04:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:04:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:04:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:04:32,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:04:32,449 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:04:32,449 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:04:32,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:04:32,464 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:04:32,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:32,502 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-30 04:04:32,502 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:04:32,504 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 04:04:32,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:32,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:32,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:32,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:32,508 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:32,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 189 transitions, 408 flow [2023-08-30 04:04:32,533 INFO L130 PetriNetUnfolder]: 62/435 cut-off events. [2023-08-30 04:04:32,534 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:04:32,536 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 04:04:32,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 15120 [2023-08-30 04:04:35,142 INFO L134 LiptonReduction]: Checked pairs total: 37564 [2023-08-30 04:04:35,142 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-30 04:04:35,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:35,147 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;@5de8a83b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:35,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:35,148 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:04:35,148 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:35,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:35,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:35,149 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 04:04:35,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 37453, now seen corresponding path program 1 times [2023-08-30 04:04:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:35,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67833230] [2023-08-30 04:04:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:35,198 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 04:04:35,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:35,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67833230] [2023-08-30 04:04:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67833230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:35,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:35,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:35,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320876995] [2023-08-30 04:04:35,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:35,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:35,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 329 [2023-08-30 04:04:35,221 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 04:04:35,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:35,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 329 [2023-08-30 04:04:35,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:37,610 INFO L130 PetriNetUnfolder]: 24490/37484 cut-off events. [2023-08-30 04:04:37,610 INFO L131 PetriNetUnfolder]: For 709/709 co-relation queries the response was YES. [2023-08-30 04:04:37,650 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 04:04:37,758 INFO L137 encePairwiseOnDemand]: 303/329 looper letters, 51 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2023-08-30 04:04:37,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 282 flow [2023-08-30 04:04:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-30 04:04:37,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542046605876393 [2023-08-30 04:04:37,760 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-30 04:04:37,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-30 04:04:37,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:37,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-30 04:04:37,762 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 04:04:37,763 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 04:04:37,763 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 04:04:37,763 INFO L175 Difference]: Start difference. First operand has 65 places, 83 transitions, 196 flow. Second operand 3 states and 547 transitions. [2023-08-30 04:04:37,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 282 flow [2023-08-30 04:04:37,765 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 04:04:37,766 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 166 flow [2023-08-30 04:04:37,766 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 04:04:37,767 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:04:37,767 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 166 flow [2023-08-30 04:04:37,767 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 04:04:37,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:37,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:37,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:04:37,768 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 04:04:37,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:37,768 INFO L85 PathProgramCache]: Analyzing trace with hash 37451, now seen corresponding path program 1 times [2023-08-30 04:04:37,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:37,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303093204] [2023-08-30 04:04:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:37,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:37,787 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 04:04:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303093204] [2023-08-30 04:04:37,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303093204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:37,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:37,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:37,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399084145] [2023-08-30 04:04:37,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:37,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-30 04:04:37,810 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 04:04:37,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:37,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-30 04:04:37,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:39,561 INFO L130 PetriNetUnfolder]: 19018/28949 cut-off events. [2023-08-30 04:04:39,561 INFO L131 PetriNetUnfolder]: For 1716/1716 co-relation queries the response was YES. [2023-08-30 04:04:39,595 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 04:04:39,695 INFO L137 encePairwiseOnDemand]: 325/329 looper letters, 61 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-30 04:04:39,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 328 flow [2023-08-30 04:04:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:04:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:04:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-30 04:04:39,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-08-30 04:04:39,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-30 04:04:39,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-30 04:04:39,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:39,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-30 04:04:39,700 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 04:04:39,701 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 04:04:39,702 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 04:04:39,702 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 166 flow. Second operand 3 states and 517 transitions. [2023-08-30 04:04:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 328 flow [2023-08-30 04:04:39,705 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 04:04:39,706 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 164 flow [2023-08-30 04:04:39,706 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 04:04:39,709 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-30 04:04:39,709 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 164 flow [2023-08-30 04:04:39,710 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 04:04:39,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:39,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:04:39,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:04:39,710 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 04:04:39,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash 258524690, now seen corresponding path program 1 times [2023-08-30 04:04:39,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:39,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733275386] [2023-08-30 04:04:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:39,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:39,805 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 04:04:39,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:39,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733275386] [2023-08-30 04:04:39,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733275386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:39,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807616142] [2023-08-30 04:04:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:39,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:39,807 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 04:04:39,810 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 04:04:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:04:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:39,893 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 04:04:39,939 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 04:04:39,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:39,983 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 04:04:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807616142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:39,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:04:39,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022279656] [2023-08-30 04:04:39,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:39,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:04:39,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:39,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:04:39,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:04:40,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 329 [2023-08-30 04:04:40,071 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 04:04:40,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:40,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 329 [2023-08-30 04:04:40,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:41,871 INFO L130 PetriNetUnfolder]: 18108/26752 cut-off events. [2023-08-30 04:04:41,872 INFO L131 PetriNetUnfolder]: For 2272/2272 co-relation queries the response was YES. [2023-08-30 04:04:41,900 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 04:04:41,965 INFO L137 encePairwiseOnDemand]: 323/329 looper letters, 114 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2023-08-30 04:04:41,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 136 transitions, 570 flow [2023-08-30 04:04:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:04:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:04:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2023-08-30 04:04:41,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522289766970618 [2023-08-30 04:04:41,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2023-08-30 04:04:41,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2023-08-30 04:04:41,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:41,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2023-08-30 04:04:41,970 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 04:04:41,972 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 04:04:41,973 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 04:04:41,973 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 164 flow. Second operand 6 states and 1031 transitions. [2023-08-30 04:04:41,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 136 transitions, 570 flow [2023-08-30 04:04:42,071 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 04:04:42,072 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 180 flow [2023-08-30 04:04:42,073 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 04:04:42,073 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:04:42,073 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 180 flow [2023-08-30 04:04:42,074 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 04:04:42,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:42,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:04:42,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 04:04:42,277 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 04:04:42,277 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 04:04:42,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1315385223, now seen corresponding path program 1 times [2023-08-30 04:04:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:42,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971133542] [2023-08-30 04:04:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:42,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:42,363 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 04:04:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971133542] [2023-08-30 04:04:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971133542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:04:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734627132] [2023-08-30 04:04:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:42,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:04:42,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:04:42,365 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 04:04:42,367 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 04:04:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:04:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:04:42,453 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 04:04:42,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:04:42,490 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 04:04:42,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734627132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:04:42,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:04:42,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 04:04:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247713239] [2023-08-30 04:04:42,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:04:42,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:04:42,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:04:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:04:42,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 329 [2023-08-30 04:04:42,600 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 04:04:42,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:42,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 329 [2023-08-30 04:04:42,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:04:43,017 INFO L130 PetriNetUnfolder]: 3352/5864 cut-off events. [2023-08-30 04:04:43,017 INFO L131 PetriNetUnfolder]: For 3831/3831 co-relation queries the response was YES. [2023-08-30 04:04:43,026 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 04:04:43,040 INFO L137 encePairwiseOnDemand]: 325/329 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 04:04:43,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 353 flow [2023-08-30 04:04:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:04:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:04:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 945 transitions. [2023-08-30 04:04:43,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787234042553192 [2023-08-30 04:04:43,044 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 945 transitions. [2023-08-30 04:04:43,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 945 transitions. [2023-08-30 04:04:43,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:04:43,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 945 transitions. [2023-08-30 04:04:43,046 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 04:04:43,048 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 04:04:43,048 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 04:04:43,049 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 180 flow. Second operand 6 states and 945 transitions. [2023-08-30 04:04:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 353 flow [2023-08-30 04:04:43,051 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 04:04:43,052 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 116 flow [2023-08-30 04:04:43,052 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 04:04:43,053 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-08-30 04:04:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 116 flow [2023-08-30 04:04:43,054 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 04:04:43,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:43,054 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:04:43,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 04:04:43,258 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 04:04:43,259 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 04:04:43,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2124429100, now seen corresponding path program 1 times [2023-08-30 04:04:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:43,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000340264] [2023-08-30 04:04:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:43,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:04:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:04:43,278 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:04:43,278 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:04:43,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:04:43,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:04:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:04:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:04:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:04:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:04:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:04:43,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:04:43,280 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:04:43,280 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:04:43,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:04:43,295 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:04:43,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-30 04:04:43,347 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-30 04:04:43,347 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:04:43,351 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 04:04:43,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 219 transitions, 482 flow [2023-08-30 04:04:43,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 219 transitions, 482 flow [2023-08-30 04:04:43,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:04:43,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-30 04:04:43,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 219 transitions, 482 flow [2023-08-30 04:04:43,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 219 transitions, 482 flow [2023-08-30 04:04:43,403 INFO L130 PetriNetUnfolder]: 96/668 cut-off events. [2023-08-30 04:04:43,403 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:04:43,407 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 04:04:43,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 23632 [2023-08-30 04:04:46,180 INFO L134 LiptonReduction]: Checked pairs total: 62137 [2023-08-30 04:04:46,180 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-30 04:04:46,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:04:46,182 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;@5de8a83b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:04:46,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:04:46,183 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:04:46,183 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:04:46,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:04:46,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:04:46,183 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 04:04:46,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:04:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 50480, now seen corresponding path program 1 times [2023-08-30 04:04:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:04:46,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933291782] [2023-08-30 04:04:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:04:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:04:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:04:46,240 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 04:04:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:04:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933291782] [2023-08-30 04:04:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933291782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:04:46,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:04:46,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:04:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615068275] [2023-08-30 04:04:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:04:46,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:04:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:04:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:04:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:04:46,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-30 04:04:46,253 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 04:04:46,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:04:46,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-30 04:04:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:18,838 INFO L130 PetriNetUnfolder]: 378216/519899 cut-off events. [2023-08-30 04:05:18,839 INFO L131 PetriNetUnfolder]: For 14786/14786 co-relation queries the response was YES. [2023-08-30 04:05:20,038 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 04:05:21,895 INFO L137 encePairwiseOnDemand]: 346/377 looper letters, 84 selfloop transitions, 2 changer transitions 1/103 dead transitions. [2023-08-30 04:05:21,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 103 transitions, 424 flow [2023-08-30 04:05:21,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:05:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:05:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 658 transitions. [2023-08-30 04:05:21,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817860300618921 [2023-08-30 04:05:21,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 658 transitions. [2023-08-30 04:05:21,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 658 transitions. [2023-08-30 04:05:21,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:21,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 658 transitions. [2023-08-30 04:05:21,905 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 04:05:21,928 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 04:05:21,928 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 04:05:21,928 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 244 flow. Second operand 3 states and 658 transitions. [2023-08-30 04:05:21,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 103 transitions, 424 flow [2023-08-30 04:05:21,934 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 04:05:21,935 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 190 flow [2023-08-30 04:05:21,935 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 04:05:21,935 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:05:21,935 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 190 flow [2023-08-30 04:05:21,936 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 04:05:21,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:05:21,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:05:21,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:05:21,936 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 04:05:21,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:05:21,937 INFO L85 PathProgramCache]: Analyzing trace with hash 50479, now seen corresponding path program 1 times [2023-08-30 04:05:21,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:05:21,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337051774] [2023-08-30 04:05:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:05:21,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:05:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:05:21,963 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 04:05:21,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:05:21,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337051774] [2023-08-30 04:05:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337051774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:05:21,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:05:21,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:05:21,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75117409] [2023-08-30 04:05:21,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:05:21,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:05:21,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:05:21,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:05:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:05:21,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-30 04:05:21,986 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 04:05:21,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:05:21,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-30 04:05:21,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:05:49,913 INFO L130 PetriNetUnfolder]: 349616/484651 cut-off events. [2023-08-30 04:05:49,913 INFO L131 PetriNetUnfolder]: For 21616/21616 co-relation queries the response was YES. [2023-08-30 04:05:51,238 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 04:05:52,831 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 72 selfloop transitions, 3 changer transitions 1/92 dead transitions. [2023-08-30 04:05:52,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 386 flow [2023-08-30 04:05:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:05:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:05:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-30 04:05:52,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349248452696729 [2023-08-30 04:05:52,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-30 04:05:52,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-30 04:05:52,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:05:52,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-30 04:05:52,834 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 04:05:52,836 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 04:05:52,836 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 04:05:52,836 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 190 flow. Second operand 3 states and 605 transitions. [2023-08-30 04:05:52,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 386 flow [2023-08-30 04:06:03,587 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 04:06:03,588 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 205 flow [2023-08-30 04:06:03,588 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 04:06:03,589 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-30 04:06:03,589 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 205 flow [2023-08-30 04:06:03,589 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 04:06:03,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:06:03,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:06:03,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:06:03,593 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 04:06:03,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:06:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash 48603595, now seen corresponding path program 1 times [2023-08-30 04:06:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:06:03,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252404968] [2023-08-30 04:06:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:06:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:06:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:06:03,622 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 04:06:03,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:06:03,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252404968] [2023-08-30 04:06:03,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252404968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:06:03,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:06:03,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:06:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811895953] [2023-08-30 04:06:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:06:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:06:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:06:03,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:06:03,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:06:03,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 377 [2023-08-30 04:06:03,631 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 04:06:03,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:06:03,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 377 [2023-08-30 04:06:03,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:06:31,231 INFO L130 PetriNetUnfolder]: 349614/484640 cut-off events. [2023-08-30 04:06:31,231 INFO L131 PetriNetUnfolder]: For 34459/34459 co-relation queries the response was YES. [2023-08-30 04:06:32,415 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 04:06:34,096 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 63 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 04:06:34,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 348 flow [2023-08-30 04:06:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:06:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:06:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-30 04:06:34,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-08-30 04:06:34,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-30 04:06:34,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-30 04:06:34,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:06:34,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-30 04:06:34,100 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 04:06:34,101 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 04:06:34,102 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 04:06:34,102 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 205 flow. Second operand 3 states and 598 transitions. [2023-08-30 04:06:34,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 348 flow [2023-08-30 04:06:34,320 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 04:06:34,321 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 206 flow [2023-08-30 04:06:34,321 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 04:06:34,321 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-30 04:06:34,321 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 206 flow [2023-08-30 04:06:34,322 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 04:06:34,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:06:34,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:06:34,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:06:34,322 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 04:06:34,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:06:34,323 INFO L85 PathProgramCache]: Analyzing trace with hash -584705603, now seen corresponding path program 1 times [2023-08-30 04:06:34,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:06:34,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275534781] [2023-08-30 04:06:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:06:34,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:06:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:06:34,365 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 04:06:34,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:06:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275534781] [2023-08-30 04:06:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275534781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:06:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478647445] [2023-08-30 04:06:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:06:34,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:06:34,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:06:34,368 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 04:06:34,413 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 04:06:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:06:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:06:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:06:34,460 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 04:06:34,488 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 04:06:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:06:34,516 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 04:06:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478647445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:06:34,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:06:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:06:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426476795] [2023-08-30 04:06:34,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:06:34,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:06:34,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:06:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:06:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:06:34,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 377 [2023-08-30 04:06:34,590 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 04:06:34,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:06:34,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 377 [2023-08-30 04:06:34,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:07:01,188 INFO L130 PetriNetUnfolder]: 355314/471647 cut-off events. [2023-08-30 04:07:01,188 INFO L131 PetriNetUnfolder]: For 18960/18960 co-relation queries the response was YES. [2023-08-30 04:07:02,296 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 04:07:03,836 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 161 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2023-08-30 04:07:03,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 185 transitions, 797 flow [2023-08-30 04:07:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:07:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:07:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1212 transitions. [2023-08-30 04:07:03,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358090185676393 [2023-08-30 04:07:03,846 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1212 transitions. [2023-08-30 04:07:03,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1212 transitions. [2023-08-30 04:07:03,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:07:03,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1212 transitions. [2023-08-30 04:07:03,849 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 04:07:03,851 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 04:07:03,851 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 04:07:03,851 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 206 flow. Second operand 6 states and 1212 transitions. [2023-08-30 04:07:03,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 185 transitions, 797 flow [2023-08-30 04:07:03,869 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 04:07:03,871 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 260 flow [2023-08-30 04:07:03,871 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 04:07:03,871 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2023-08-30 04:07:03,871 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 260 flow [2023-08-30 04:07:03,872 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 04:07:03,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:07:03,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:07:03,881 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 04:07:04,077 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 04:07:04,078 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 04:07:04,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:07:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1102572154, now seen corresponding path program 1 times [2023-08-30 04:07:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:07:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034319661] [2023-08-30 04:07:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:07:04,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:07:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:07:04,133 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 04:07:04,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:07:04,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034319661] [2023-08-30 04:07:04,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034319661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:07:04,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:07:04,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:07:04,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556628667] [2023-08-30 04:07:04,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:07:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:07:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:07:04,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:07:04,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:07:04,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 377 [2023-08-30 04:07:04,168 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 04:07:04,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:07:04,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 377 [2023-08-30 04:07:04,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:07:35,140 INFO L130 PetriNetUnfolder]: 311412/429153 cut-off events. [2023-08-30 04:07:35,140 INFO L131 PetriNetUnfolder]: For 153900/153900 co-relation queries the response was YES. [2023-08-30 04:07:36,424 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 04:07:38,081 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 122 selfloop transitions, 7 changer transitions 0/145 dead transitions. [2023-08-30 04:07:38,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 145 transitions, 666 flow [2023-08-30 04:07:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:07:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:07:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-08-30 04:07:38,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444297082228117 [2023-08-30 04:07:38,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-08-30 04:07:38,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-08-30 04:07:38,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:07:38,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-08-30 04:07:38,092 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 04:07:38,094 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 04:07:38,095 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 04:07:38,095 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 260 flow. Second operand 4 states and 821 transitions. [2023-08-30 04:07:38,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 145 transitions, 666 flow [2023-08-30 04:07:38,522 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 04:07:38,524 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 275 flow [2023-08-30 04:07:38,524 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 04:07:38,524 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2023-08-30 04:07:38,524 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 275 flow [2023-08-30 04:07:38,525 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 04:07:38,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:07:38,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:07:38,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 04:07:38,526 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 04:07:38,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:07:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1102573136, now seen corresponding path program 1 times [2023-08-30 04:07:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:07:38,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414775511] [2023-08-30 04:07:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:07:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:07:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:07:38,582 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 04:07:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:07:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414775511] [2023-08-30 04:07:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414775511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:07:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:07:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:07:38,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204490653] [2023-08-30 04:07:38,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:07:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:07:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:07:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:07:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:07:38,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 377 [2023-08-30 04:07:38,606 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 04:07:38,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:07:38,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 377 [2023-08-30 04:07:38,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:08,764 INFO L130 PetriNetUnfolder]: 349445/473802 cut-off events. [2023-08-30 04:08:08,764 INFO L131 PetriNetUnfolder]: For 196607/196607 co-relation queries the response was YES. [2023-08-30 04:08:10,567 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 04:08:12,243 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 88 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2023-08-30 04:08:12,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 108 transitions, 587 flow [2023-08-30 04:08:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-30 04:08:12,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296198054818745 [2023-08-30 04:08:12,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-30 04:08:12,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-30 04:08:12,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:12,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-30 04:08:12,247 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 04:08:12,248 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 04:08:12,249 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 04:08:12,249 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 275 flow. Second operand 3 states and 599 transitions. [2023-08-30 04:08:12,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 108 transitions, 587 flow [2023-08-30 04:08:14,024 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 04:08:14,025 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 304 flow [2023-08-30 04:08:14,025 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 04:08:14,026 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 14 predicate places. [2023-08-30 04:08:14,026 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 304 flow [2023-08-30 04:08:14,026 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 04:08:14,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:14,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 04:08:14,027 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 04:08:14,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash -878572026, now seen corresponding path program 1 times [2023-08-30 04:08:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:14,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623156713] [2023-08-30 04:08:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:14,060 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 04:08:14,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:14,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623156713] [2023-08-30 04:08:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623156713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:08:14,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461122879] [2023-08-30 04:08:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:08:14,063 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 04:08:14,106 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 04:08:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:08:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:08:14,159 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 04:08:14,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:08:14,183 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 04:08:14,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461122879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:08:14,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:08:14,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 04:08:14,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144636767] [2023-08-30 04:08:14,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:08:14,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:08:14,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:08:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:08:14,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 377 [2023-08-30 04:08:14,205 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 04:08:14,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:14,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 377 [2023-08-30 04:08:14,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:21,915 INFO L130 PetriNetUnfolder]: 82402/116478 cut-off events. [2023-08-30 04:08:21,916 INFO L131 PetriNetUnfolder]: For 94839/94839 co-relation queries the response was YES. [2023-08-30 04:08:22,337 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 04:08:22,688 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 132 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2023-08-30 04:08:22,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 152 transitions, 724 flow [2023-08-30 04:08:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:08:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:08:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1362 transitions. [2023-08-30 04:08:22,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161045850701023 [2023-08-30 04:08:22,691 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1362 transitions. [2023-08-30 04:08:22,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1362 transitions. [2023-08-30 04:08:22,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:22,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1362 transitions. [2023-08-30 04:08:22,693 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 04:08:22,695 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 04:08:22,696 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 04:08:22,696 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 304 flow. Second operand 7 states and 1362 transitions. [2023-08-30 04:08:22,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 152 transitions, 724 flow [2023-08-30 04:08:22,784 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 04:08:22,785 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 207 flow [2023-08-30 04:08:22,785 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 04:08:22,786 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2023-08-30 04:08:22,786 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 207 flow [2023-08-30 04:08:22,786 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 04:08:22,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:22,786 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:22,791 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 04:08:22,990 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 04:08:22,991 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 04:08:22,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1371777441, now seen corresponding path program 1 times [2023-08-30 04:08:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766764430] [2023-08-30 04:08:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:23,164 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 04:08:23,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766764430] [2023-08-30 04:08:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766764430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:23,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:23,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 04:08:23,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486795092] [2023-08-30 04:08:23,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:23,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:08:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:08:23,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:08:23,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 377 [2023-08-30 04:08:23,242 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 04:08:23,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:23,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 377 [2023-08-30 04:08:23,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:28,684 INFO L130 PetriNetUnfolder]: 61747/90328 cut-off events. [2023-08-30 04:08:28,684 INFO L131 PetriNetUnfolder]: For 66151/66151 co-relation queries the response was YES. [2023-08-30 04:08:29,026 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 04:08:29,277 INFO L137 encePairwiseOnDemand]: 374/377 looper letters, 131 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2023-08-30 04:08:29,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 693 flow [2023-08-30 04:08:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:08:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:08:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1349 transitions. [2023-08-30 04:08:29,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511178476695718 [2023-08-30 04:08:29,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1349 transitions. [2023-08-30 04:08:29,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1349 transitions. [2023-08-30 04:08:29,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:29,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1349 transitions. [2023-08-30 04:08:29,282 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 04:08:29,285 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 04:08:29,285 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 04:08:29,285 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 207 flow. Second operand 7 states and 1349 transitions. [2023-08-30 04:08:29,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 693 flow [2023-08-30 04:08:29,313 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 04:08:29,314 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 188 flow [2023-08-30 04:08:29,314 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 04:08:29,315 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2023-08-30 04:08:29,315 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 188 flow [2023-08-30 04:08:29,315 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 04:08:29,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:29,316 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 04:08:29,316 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 04:08:29,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash -424570937, now seen corresponding path program 1 times [2023-08-30 04:08:29,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:29,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283005688] [2023-08-30 04:08:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:29,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:29,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:08:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:29,335 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:08:29,335 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:08:29,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-30 04:08:29,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-30 04:08:29,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-30 04:08:29,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-30 04:08:29,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-30 04:08:29,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-08-30 04:08:29,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-08-30 04:08:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 04:08:29,336 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:08:29,336 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:08:29,338 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:08:29,352 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:08:29,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:29,429 INFO L130 PetriNetUnfolder]: 158/1073 cut-off events. [2023-08-30 04:08:29,429 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:08:29,436 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 04:08:29,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:29,440 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:29,440 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:08:29,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:29,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:29,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 249 transitions, 558 flow [2023-08-30 04:08:29,513 INFO L130 PetriNetUnfolder]: 158/1073 cut-off events. [2023-08-30 04:08:29,513 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:08:29,520 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 04:08:29,537 INFO L119 LiptonReduction]: Number of co-enabled transitions 33880 [2023-08-30 04:08:32,138 INFO L134 LiptonReduction]: Checked pairs total: 103475 [2023-08-30 04:08:32,138 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-08-30 04:08:32,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:08:32,141 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;@5de8a83b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:08:32,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 04:08:32,141 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:08:32,141 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:08:32,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:32,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:32,142 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 04:08:32,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash 64881, now seen corresponding path program 1 times [2023-08-30 04:08:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563382144] [2023-08-30 04:08:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:32,168 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 04:08:32,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:32,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563382144] [2023-08-30 04:08:32,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563382144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:32,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:32,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:32,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889691925] [2023-08-30 04:08:32,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:32,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:32,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:32,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:32,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 419 [2023-08-30 04:08:32,190 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 04:08:32,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:32,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 419 [2023-08-30 04:08:32,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand