./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --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 04:16:54,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:16:54,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:16:54,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:16:54,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:16:54,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:16:54,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:16:54,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:16:54,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:16:55,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:16:55,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:16:55,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:16:55,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:16:55,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:16:55,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:16:55,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:16:55,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:16:55,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:16:55,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:16:55,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:16:55,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:16:55,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:16:55,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:16:55,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:16:55,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:16:55,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:16:55,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:16:55,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:16:55,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:16:55,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:16:55,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:16:55,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:16:55,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:16:55,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:16:55,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:16:55,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:16:55,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:16:55,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:16:55,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:16:55,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:16:55,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:16:55,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:16:55,085 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:16:55,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:16:55,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:16:55,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:16:55,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:16:55,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:16:55,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:16:55,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:16:55,088 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:16:55,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:16:55,089 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:16:55,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:16:55,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:16:55,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:16:55,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:16:55,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:16:55,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:16:55,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:16:55,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:16:55,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:16:55,091 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:16:55,091 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:16:55,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:16:55,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:16:55,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:16:55,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:16:55,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:16:55,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:16:55,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:16:55,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:16:55,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:16:55,093 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:16:55,093 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:16:55,094 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:16:55,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:16:55,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:16:55,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:16:55,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:16:55,436 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:16:55,436 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:16:55,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-08-30 04:16:56,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:16:56,827 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:16:56,828 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-08-30 04:16:56,854 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5817f674f/7ae176c0236143cb90e691d470888d95/FLAG5f7c1f1b0 [2023-08-30 04:16:56,866 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5817f674f/7ae176c0236143cb90e691d470888d95 [2023-08-30 04:16:56,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:16:56,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:16:56,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:16:56,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:16:56,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:16:56,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:16:56" (1/1) ... [2023-08-30 04:16:56,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12790ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:56, skipping insertion in model container [2023-08-30 04:16:56,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:16:56" (1/1) ... [2023-08-30 04:16:56,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:16:56,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:16:57,243 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_74-tricky_address1_racefree.i[41323,41336] [2023-08-30 04:16:57,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:16:57,308 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:16:57,346 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_74-tricky_address1_racefree.i[41323,41336] [2023-08-30 04:16:57,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:16:57,425 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:16:57,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57 WrapperNode [2023-08-30 04:16:57,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:16:57,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:16:57,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:16:57,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:16:57,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,493 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 190 [2023-08-30 04:16:57,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:16:57,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:16:57,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:16:57,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:16:57,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,526 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:16:57,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:16:57,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:16:57,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:16:57,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (1/1) ... [2023-08-30 04:16:57,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:16:57,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:16:57,594 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 04:16:57,596 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 04:16:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:16:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:16:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:16:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:16:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:16:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:16:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:16:57,632 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:16:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:16:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:16:57,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:16:57,634 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 04:16:57,869 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:16:57,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:16:58,293 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:16:58,304 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:16:58,304 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-30 04:16:58,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:16:58 BoogieIcfgContainer [2023-08-30 04:16:58,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:16:58,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:16:58,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:16:58,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:16:58,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:16:56" (1/3) ... [2023-08-30 04:16:58,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4e262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:16:58, skipping insertion in model container [2023-08-30 04:16:58,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:16:57" (2/3) ... [2023-08-30 04:16:58,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4e262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:16:58, skipping insertion in model container [2023-08-30 04:16:58,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:16:58" (3/3) ... [2023-08-30 04:16:58,315 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-08-30 04:16:58,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:16:58,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-08-30 04:16:58,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:16:58,413 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:16:58,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 218 transitions, 444 flow [2023-08-30 04:16:58,570 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2023-08-30 04:16:58,570 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 04:16:58,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1160 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-30 04:16:58,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 218 transitions, 444 flow [2023-08-30 04:16:58,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 218 transitions, 444 flow [2023-08-30 04:16:58,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:16:58,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 218 transitions, 444 flow [2023-08-30 04:16:58,625 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 218 transitions, 444 flow [2023-08-30 04:16:58,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 218 transitions, 444 flow [2023-08-30 04:16:58,678 INFO L130 PetriNetUnfolder]: 45/305 cut-off events. [2023-08-30 04:16:58,678 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2023-08-30 04:16:58,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 305 events. 45/305 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1160 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-30 04:16:58,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 14508 [2023-08-30 04:17:02,695 INFO L134 LiptonReduction]: Checked pairs total: 29354 [2023-08-30 04:17:02,695 INFO L136 LiptonReduction]: Total number of compositions: 201 [2023-08-30 04:17:02,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:17:02,714 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;@2070239b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:17:02,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-30 04:17:02,718 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2023-08-30 04:17:02,718 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:17:02,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:02,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:17:02,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:02,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 862756, now seen corresponding path program 1 times [2023-08-30 04:17:02,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:02,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729088541] [2023-08-30 04:17:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:02,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729088541] [2023-08-30 04:17:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729088541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:02,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399875392] [2023-08-30 04:17:02,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:02,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:02,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 419 [2023-08-30 04:17:02,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:02,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:02,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 419 [2023-08-30 04:17:02,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:03,285 INFO L130 PetriNetUnfolder]: 621/1407 cut-off events. [2023-08-30 04:17:03,286 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:17:03,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 1407 events. 621/1407 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9184 event pairs, 570 based on Foata normal form. 104/1008 useless extension candidates. Maximal degree in co-relation 2555. Up to 1225 conditions per place. [2023-08-30 04:17:03,298 INFO L137 encePairwiseOnDemand]: 389/419 looper letters, 54 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-30 04:17:03,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 254 flow [2023-08-30 04:17:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-30 04:17:03,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035799522673031 [2023-08-30 04:17:03,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-30 04:17:03,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-30 04:17:03,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:03,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-30 04:17:03,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,333 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 633 transitions. [2023-08-30 04:17:03,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 254 flow [2023-08-30 04:17:03,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:03,340 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2023-08-30 04:17:03,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-30 04:17:03,345 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-08-30 04:17:03,346 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2023-08-30 04:17:03,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:03,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:17:03,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:17:03,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:03,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 26729995, now seen corresponding path program 1 times [2023-08-30 04:17:03,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:03,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379757097] [2023-08-30 04:17:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:03,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:03,421 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 04:17:03,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:03,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379757097] [2023-08-30 04:17:03,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379757097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:03,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690370763] [2023-08-30 04:17:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:03,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:03,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:03,432 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 04:17:03,459 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 04:17:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:17:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:03,563 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 04:17:03,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:03,593 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 04:17:03,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690370763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:03,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:17:03,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499809581] [2023-08-30 04:17:03,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:03,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:03,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 419 [2023-08-30 04:17:03,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 183.28571428571428) internal successors, (1283), 7 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:03,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 419 [2023-08-30 04:17:03,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:03,839 INFO L130 PetriNetUnfolder]: 621/1410 cut-off events. [2023-08-30 04:17:03,839 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:17:03,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 1410 events. 621/1410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9196 event pairs, 570 based on Foata normal form. 0/907 useless extension candidates. Maximal degree in co-relation 2644. Up to 1225 conditions per place. [2023-08-30 04:17:03,846 INFO L137 encePairwiseOnDemand]: 416/419 looper letters, 54 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-30 04:17:03,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 282 flow [2023-08-30 04:17:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1154 transitions. [2023-08-30 04:17:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590294351630867 [2023-08-30 04:17:03,851 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1154 transitions. [2023-08-30 04:17:03,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1154 transitions. [2023-08-30 04:17:03,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:03,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1154 transitions. [2023-08-30 04:17:03,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,860 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,860 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1154 transitions. [2023-08-30 04:17:03,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 282 flow [2023-08-30 04:17:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:03,863 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2023-08-30 04:17:03,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-08-30 04:17:03,864 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-08-30 04:17:03,865 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2023-08-30 04:17:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.28571428571428) internal successors, (1283), 7 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:03,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:03,866 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:03,873 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 04:17:04,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:04,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:04,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1728936806, now seen corresponding path program 2 times [2023-08-30 04:17:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:04,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948717077] [2023-08-30 04:17:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:04,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:04,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948717077] [2023-08-30 04:17:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948717077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650499814] [2023-08-30 04:17:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:04,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 419 [2023-08-30 04:17:04,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:04,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 419 [2023-08-30 04:17:04,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:04,505 INFO L130 PetriNetUnfolder]: 579/1314 cut-off events. [2023-08-30 04:17:04,505 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:17:04,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1314 events. 579/1314 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8505 event pairs, 494 based on Foata normal form. 0/867 useless extension candidates. Maximal degree in co-relation 2459. Up to 1062 conditions per place. [2023-08-30 04:17:04,513 INFO L137 encePairwiseOnDemand]: 414/419 looper letters, 73 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-30 04:17:04,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 370 flow [2023-08-30 04:17:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-30 04:17:04,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48607796340493237 [2023-08-30 04:17:04,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-30 04:17:04,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-30 04:17:04,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:04,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-30 04:17:04,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,525 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 611 transitions. [2023-08-30 04:17:04,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 370 flow [2023-08-30 04:17:04,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 356 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:04,528 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 172 flow [2023-08-30 04:17:04,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-08-30 04:17:04,529 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-30 04:17:04,529 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 172 flow [2023-08-30 04:17:04,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:04,530 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:04,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 04:17:04,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:04,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1728936804, now seen corresponding path program 1 times [2023-08-30 04:17:04,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:04,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418285609] [2023-08-30 04:17:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418285609] [2023-08-30 04:17:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418285609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883396716] [2023-08-30 04:17:04,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:04,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:04,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:04,608 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 04:17:04,617 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 04:17:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:17:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:04,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883396716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:04,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:17:04,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213519789] [2023-08-30 04:17:04,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:04,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:17:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:04,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:17:04,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:17:04,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 419 [2023-08-30 04:17:04,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:04,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:04,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 419 [2023-08-30 04:17:04,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:05,016 INFO L130 PetriNetUnfolder]: 581/1326 cut-off events. [2023-08-30 04:17:05,018 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2023-08-30 04:17:05,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1326 events. 581/1326 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8510 event pairs, 532 based on Foata normal form. 6/906 useless extension candidates. Maximal degree in co-relation 2508. Up to 1145 conditions per place. [2023-08-30 04:17:05,026 INFO L137 encePairwiseOnDemand]: 416/419 looper letters, 52 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-30 04:17:05,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 334 flow [2023-08-30 04:17:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:17:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:17:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2253 transitions. [2023-08-30 04:17:05,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448090692124105 [2023-08-30 04:17:05,033 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2253 transitions. [2023-08-30 04:17:05,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2253 transitions. [2023-08-30 04:17:05,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:05,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2253 transitions. [2023-08-30 04:17:05,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.75) internal successors, (2253), 12 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 419.0) internal successors, (5447), 13 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,055 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 419.0) internal successors, (5447), 13 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,055 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 172 flow. Second operand 12 states and 2253 transitions. [2023-08-30 04:17:05,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 334 flow [2023-08-30 04:17:05,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:05,059 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 250 flow [2023-08-30 04:17:05,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-30 04:17:05,060 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2023-08-30 04:17:05,060 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 250 flow [2023-08-30 04:17:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 183.15384615384616) internal successors, (2381), 13 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:05,061 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-30 04:17:05,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:05,268 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,SelfDestructingSolverStorable3 [2023-08-30 04:17:05,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:05,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash 316868932, now seen corresponding path program 2 times [2023-08-30 04:17:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:05,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348742652] [2023-08-30 04:17:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:05,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:05,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348742652] [2023-08-30 04:17:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348742652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:05,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:05,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:05,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515844279] [2023-08-30 04:17:05,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:05,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:05,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:05,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 419 [2023-08-30 04:17:05,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:05,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 419 [2023-08-30 04:17:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:05,718 INFO L130 PetriNetUnfolder]: 554/1219 cut-off events. [2023-08-30 04:17:05,719 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2023-08-30 04:17:05,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1219 events. 554/1219 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8104 event pairs, 0 based on Foata normal form. 0/801 useless extension candidates. Maximal degree in co-relation 2360. Up to 1111 conditions per place. [2023-08-30 04:17:05,725 INFO L137 encePairwiseOnDemand]: 415/419 looper letters, 81 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 04:17:05,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 456 flow [2023-08-30 04:17:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-30 04:17:05,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49403341288782815 [2023-08-30 04:17:05,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-30 04:17:05,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-30 04:17:05,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:05,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-30 04:17:05,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,733 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 250 flow. Second operand 3 states and 621 transitions. [2023-08-30 04:17:05,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 456 flow [2023-08-30 04:17:05,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 94 transitions, 408 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:17:05,737 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 212 flow [2023-08-30 04:17:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-08-30 04:17:05,738 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2023-08-30 04:17:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 212 flow [2023-08-30 04:17:05,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:05,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:05,739 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:17:05,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:05,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -495094452, now seen corresponding path program 1 times [2023-08-30 04:17:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705708389] [2023-08-30 04:17:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:05,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705708389] [2023-08-30 04:17:05,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705708389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454338481] [2023-08-30 04:17:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:05,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:05,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:05,862 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 04:17:05,887 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 04:17:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:17:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:06,005 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 04:17:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:06,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454338481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:06,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-30 04:17:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826056878] [2023-08-30 04:17:06,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:06,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:17:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:17:06,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:17:06,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 419 [2023-08-30 04:17:06,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 180.125) internal successors, (1441), 8 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:06,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 419 [2023-08-30 04:17:06,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:06,464 INFO L130 PetriNetUnfolder]: 42/134 cut-off events. [2023-08-30 04:17:06,465 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2023-08-30 04:17:06,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 134 events. 42/134 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 444 event pairs, 15 based on Foata normal form. 20/133 useless extension candidates. Maximal degree in co-relation 280. Up to 78 conditions per place. [2023-08-30 04:17:06,466 INFO L137 encePairwiseOnDemand]: 415/419 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-30 04:17:06,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 293 flow [2023-08-30 04:17:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:17:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:17:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 759 transitions. [2023-08-30 04:17:06,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528639618138425 [2023-08-30 04:17:06,469 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 759 transitions. [2023-08-30 04:17:06,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 759 transitions. [2023-08-30 04:17:06,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:06,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 759 transitions. [2023-08-30 04:17:06,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.75) internal successors, (759), 4 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 419.0) internal successors, (2095), 5 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,474 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 419.0) internal successors, (2095), 5 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,474 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 212 flow. Second operand 4 states and 759 transitions. [2023-08-30 04:17:06,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 293 flow [2023-08-30 04:17:06,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 287 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:17:06,477 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 141 flow [2023-08-30 04:17:06,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-30 04:17:06,478 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2023-08-30 04:17:06,478 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 141 flow [2023-08-30 04:17:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.125) internal successors, (1441), 8 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:06,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:06,479 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:06,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:06,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:06,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:06,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1831967456, now seen corresponding path program 1 times [2023-08-30 04:17:06,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:06,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540327131] [2023-08-30 04:17:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:06,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:06,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:06,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540327131] [2023-08-30 04:17:06,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540327131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:06,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965829706] [2023-08-30 04:17:06,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:07,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 419 [2023-08-30 04:17:07,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:07,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:07,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 419 [2023-08-30 04:17:07,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:07,189 INFO L130 PetriNetUnfolder]: 36/119 cut-off events. [2023-08-30 04:17:07,189 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2023-08-30 04:17:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 119 events. 36/119 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 334 event pairs, 0 based on Foata normal form. 3/107 useless extension candidates. Maximal degree in co-relation 223. Up to 80 conditions per place. [2023-08-30 04:17:07,190 INFO L137 encePairwiseOnDemand]: 413/419 looper letters, 31 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-30 04:17:07,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 42 transitions, 209 flow [2023-08-30 04:17:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:17:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:17:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 847 transitions. [2023-08-30 04:17:07,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40429594272076375 [2023-08-30 04:17:07,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 847 transitions. [2023-08-30 04:17:07,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 847 transitions. [2023-08-30 04:17:07,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:07,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 847 transitions. [2023-08-30 04:17:07,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:07,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 419.0) internal successors, (2514), 6 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:07,200 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 419.0) internal successors, (2514), 6 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:07,200 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 141 flow. Second operand 5 states and 847 transitions. [2023-08-30 04:17:07,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 42 transitions, 209 flow [2023-08-30 04:17:07,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 42 transitions, 205 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:07,202 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 138 flow [2023-08-30 04:17:07,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2023-08-30 04:17:07,203 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -14 predicate places. [2023-08-30 04:17:07,203 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 138 flow [2023-08-30 04:17:07,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:07,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:07,204 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-30 04:17:07,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 04:17:07,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-30 04:17:07,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1831941840, now seen corresponding path program 1 times [2023-08-30 04:17:07,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411267878] [2023-08-30 04:17:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:07,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:17:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:17:07,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:17:07,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:17:07,268 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-08-30 04:17:07,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-30 04:17:07,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-30 04:17:07,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-30 04:17:07,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-30 04:17:07,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-08-30 04:17:07,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-30 04:17:07,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (31 of 39 remaining) [2023-08-30 04:17:07,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-30 04:17:07,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-30 04:17:07,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-30 04:17:07,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-30 04:17:07,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-30 04:17:07,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-30 04:17:07,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-30 04:17:07,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-30 04:17:07,272 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-08-30 04:17:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-30 04:17:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-30 04:17:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-30 04:17:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-30 04:17:07,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-30 04:17:07,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-30 04:17:07,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-30 04:17:07,276 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-30 04:17:07,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-30 04:17:07,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-30 04:17:07,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-08-30 04:17:07,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-30 04:17:07,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-08-30 04:17:07,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-30 04:17:07,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-30 04:17:07,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-30 04:17:07,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-30 04:17:07,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-30 04:17:07,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-30 04:17:07,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-30 04:17:07,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-30 04:17:07,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-08-30 04:17:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:17:07,279 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-30 04:17:07,282 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:17:07,283 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:17:07,327 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:17:07,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,382 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-08-30 04:17:07,383 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 04:17:07,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 75/501 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2292 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 307. Up to 12 conditions per place. [2023-08-30 04:17:07,390 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:17:07,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 298 transitions, 614 flow [2023-08-30 04:17:07,459 INFO L130 PetriNetUnfolder]: 75/501 cut-off events. [2023-08-30 04:17:07,459 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2023-08-30 04:17:07,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 501 events. 75/501 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2292 event pairs, 0 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 307. Up to 12 conditions per place. [2023-08-30 04:17:07,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 42900 [2023-08-30 04:17:11,695 INFO L134 LiptonReduction]: Checked pairs total: 81765 [2023-08-30 04:17:11,695 INFO L136 LiptonReduction]: Total number of compositions: 272 [2023-08-30 04:17:11,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:17:11,697 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;@2070239b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:17:11,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-08-30 04:17:11,699 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2023-08-30 04:17:11,699 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:17:11,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:11,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:17:11,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:11,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1507360, now seen corresponding path program 1 times [2023-08-30 04:17:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:11,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321448440] [2023-08-30 04:17:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:11,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:11,719 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 04:17:11,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:11,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321448440] [2023-08-30 04:17:11,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321448440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:11,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:11,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:11,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357035615] [2023-08-30 04:17:11,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:11,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:11,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:11,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:11,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 570 [2023-08-30 04:17:11,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:11,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:11,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 570 [2023-08-30 04:17:11,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:15,254 INFO L130 PetriNetUnfolder]: 28201/45446 cut-off events. [2023-08-30 04:17:15,254 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-08-30 04:17:15,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87035 conditions, 45446 events. 28201/45446 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 375948 event pairs, 26736 based on Foata normal form. 3624/32258 useless extension candidates. Maximal degree in co-relation 35374. Up to 41457 conditions per place. [2023-08-30 04:17:15,570 INFO L137 encePairwiseOnDemand]: 528/570 looper letters, 77 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2023-08-30 04:17:15,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 370 flow [2023-08-30 04:17:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 863 transitions. [2023-08-30 04:17:15,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046783625730994 [2023-08-30 04:17:15,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 863 transitions. [2023-08-30 04:17:15,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 863 transitions. [2023-08-30 04:17:15,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:15,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 863 transitions. [2023-08-30 04:17:15,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.6666666666667) internal successors, (863), 3 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 04:17:15,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,582 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 863 transitions. [2023-08-30 04:17:15,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 370 flow [2023-08-30 04:17:15,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:15,585 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 222 flow [2023-08-30 04:17:15,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-08-30 04:17:15,587 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-08-30 04:17:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 222 flow [2023-08-30 04:17:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:15,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:17:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:17:15,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:15,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:15,589 INFO L85 PathProgramCache]: Analyzing trace with hash 46683970, now seen corresponding path program 1 times [2023-08-30 04:17:15,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:15,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521755258] [2023-08-30 04:17:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:15,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:15,635 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 04:17:15,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:15,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521755258] [2023-08-30 04:17:15,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521755258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:15,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762422932] [2023-08-30 04:17:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:15,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:15,638 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 04:17:15,666 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 04:17:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:17:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:15,727 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 04:17:15,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:15,746 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 04:17:15,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762422932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:15,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:15,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:17:15,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647340742] [2023-08-30 04:17:15,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:15,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:15,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:15,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 570 [2023-08-30 04:17:15,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:15,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:15,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 570 [2023-08-30 04:17:15,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:18,623 INFO L130 PetriNetUnfolder]: 28201/45449 cut-off events. [2023-08-30 04:17:18,623 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2023-08-30 04:17:18,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87051 conditions, 45449 events. 28201/45449 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 1869. Compared 376129 event pairs, 26736 based on Foata normal form. 0/28637 useless extension candidates. Maximal degree in co-relation 87038. Up to 41457 conditions per place. [2023-08-30 04:17:19,128 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 77 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-08-30 04:17:19,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 398 flow [2023-08-30 04:17:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1567 transitions. [2023-08-30 04:17:19,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458187134502924 [2023-08-30 04:17:19,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1567 transitions. [2023-08-30 04:17:19,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1567 transitions. [2023-08-30 04:17:19,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:19,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1567 transitions. [2023-08-30 04:17:19,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 261.1666666666667) internal successors, (1567), 6 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,145 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,145 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 222 flow. Second operand 6 states and 1567 transitions. [2023-08-30 04:17:19,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 398 flow [2023-08-30 04:17:19,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:19,148 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 254 flow [2023-08-30 04:17:19,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2023-08-30 04:17:19,149 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2023-08-30 04:17:19,149 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 254 flow [2023-08-30 04:17:19,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 248.28571428571428) internal successors, (1738), 7 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:19,151 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:19,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:19,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:19,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash -851134304, now seen corresponding path program 2 times [2023-08-30 04:17:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:19,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653414519] [2023-08-30 04:17:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653414519] [2023-08-30 04:17:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653414519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720235075] [2023-08-30 04:17:19,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:17:19,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:19,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:19,419 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 04:17:19,422 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 04:17:19,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 04:17:19,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:17:19,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:17:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:19,501 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 04:17:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:19,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:17:19,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720235075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:19,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:17:19,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-30 04:17:19,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296064026] [2023-08-30 04:17:19,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:19,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:17:19,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 570 [2023-08-30 04:17:19,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:19,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:19,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 570 [2023-08-30 04:17:19,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:22,265 INFO L130 PetriNetUnfolder]: 27810/44598 cut-off events. [2023-08-30 04:17:22,265 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2023-08-30 04:17:22,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86216 conditions, 44598 events. 27810/44598 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 368220 event pairs, 12936 based on Foata normal form. 0/28298 useless extension candidates. Maximal degree in co-relation 86181. Up to 41416 conditions per place. [2023-08-30 04:17:22,541 INFO L137 encePairwiseOnDemand]: 566/570 looper letters, 103 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-08-30 04:17:22,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 510 flow [2023-08-30 04:17:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 844 transitions. [2023-08-30 04:17:22,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935672514619883 [2023-08-30 04:17:22,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 844 transitions. [2023-08-30 04:17:22,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 844 transitions. [2023-08-30 04:17:22,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:22,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 844 transitions. [2023-08-30 04:17:22,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.3333333333333) internal successors, (844), 3 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,563 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 254 flow. Second operand 3 states and 844 transitions. [2023-08-30 04:17:22,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 510 flow [2023-08-30 04:17:22,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 123 transitions, 496 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:22,567 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 254 flow [2023-08-30 04:17:22,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-08-30 04:17:22,568 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2023-08-30 04:17:22,569 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 254 flow [2023-08-30 04:17:22,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.33333333333334) internal successors, (745), 3 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:22,570 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-30 04:17:22,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 04:17:22,775 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,SelfDestructingSolverStorable10 [2023-08-30 04:17:22,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:22,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -851134303, now seen corresponding path program 1 times [2023-08-30 04:17:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:22,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30495178] [2023-08-30 04:17:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:22,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:17:22,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:22,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30495178] [2023-08-30 04:17:22,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30495178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:22,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:22,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:17:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796140461] [2023-08-30 04:17:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:22,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:17:22,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:17:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:17:22,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 570 [2023-08-30 04:17:22,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:22,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:22,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 570 [2023-08-30 04:17:22,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:25,597 INFO L130 PetriNetUnfolder]: 26358/41888 cut-off events. [2023-08-30 04:17:25,597 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2023-08-30 04:17:25,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82135 conditions, 41888 events. 26358/41888 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 339707 event pairs, 23069 based on Foata normal form. 0/27283 useless extension candidates. Maximal degree in co-relation 82105. Up to 35764 conditions per place. [2023-08-30 04:17:25,854 INFO L137 encePairwiseOnDemand]: 565/570 looper letters, 119 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-08-30 04:17:25,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 576 flow [2023-08-30 04:17:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:17:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:17:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 851 transitions. [2023-08-30 04:17:25,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976608187134503 [2023-08-30 04:17:25,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 851 transitions. [2023-08-30 04:17:25,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 851 transitions. [2023-08-30 04:17:25,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:25,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 851 transitions. [2023-08-30 04:17:25,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:25,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:25,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 570.0) internal successors, (2280), 4 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:25,865 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 254 flow. Second operand 3 states and 851 transitions. [2023-08-30 04:17:25,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 576 flow [2023-08-30 04:17:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:25,870 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 254 flow [2023-08-30 04:17:25,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-08-30 04:17:25,872 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2023-08-30 04:17:25,872 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 254 flow [2023-08-30 04:17:25,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:25,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:25,873 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:25,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 04:17:25,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:25,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1219344055, now seen corresponding path program 1 times [2023-08-30 04:17:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:25,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579283800] [2023-08-30 04:17:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:25,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:25,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579283800] [2023-08-30 04:17:25,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579283800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583423013] [2023-08-30 04:17:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:25,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:25,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:25,934 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 04:17:25,937 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 04:17:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:17:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:26,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:17:26,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583423013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:26,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:26,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 04:17:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122069088] [2023-08-30 04:17:26,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:26,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:17:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:26,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:17:26,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-30 04:17:26,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 570 [2023-08-30 04:17:26,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 248.46153846153845) internal successors, (3230), 13 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:26,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:26,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 570 [2023-08-30 04:17:26,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:28,850 INFO L130 PetriNetUnfolder]: 26438/42014 cut-off events. [2023-08-30 04:17:28,851 INFO L131 PetriNetUnfolder]: For 1412/1412 co-relation queries the response was YES. [2023-08-30 04:17:28,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83271 conditions, 42014 events. 26438/42014 cut-off events. For 1412/1412 co-relation queries the response was YES. Maximal size of possible extension queue 1764. Compared 339178 event pairs, 24913 based on Foata normal form. 6/27939 useless extension candidates. Maximal degree in co-relation 83217. Up to 38623 conditions per place. [2023-08-30 04:17:29,319 INFO L137 encePairwiseOnDemand]: 567/570 looper letters, 76 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2023-08-30 04:17:29,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 464 flow [2023-08-30 04:17:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 04:17:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 04:17:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3056 transitions. [2023-08-30 04:17:29,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44678362573099417 [2023-08-30 04:17:29,327 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3056 transitions. [2023-08-30 04:17:29,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3056 transitions. [2023-08-30 04:17:29,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:29,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3056 transitions. [2023-08-30 04:17:29,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 254.66666666666666) internal successors, (3056), 12 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:29,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:29,345 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 570.0) internal successors, (7410), 13 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:29,345 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 254 flow. Second operand 12 states and 3056 transitions. [2023-08-30 04:17:29,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 464 flow [2023-08-30 04:17:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 458 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:29,405 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 332 flow [2023-08-30 04:17:29,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2023-08-30 04:17:29,406 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2023-08-30 04:17:29,406 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 332 flow [2023-08-30 04:17:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 248.46153846153845) internal successors, (3230), 13 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:29,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:29,408 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:29,416 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 04:17:29,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:29,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:29,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash 322307593, now seen corresponding path program 2 times [2023-08-30 04:17:29,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:29,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225727996] [2023-08-30 04:17:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:29,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225727996] [2023-08-30 04:17:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225727996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:29,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111337728] [2023-08-30 04:17:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:29,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:30,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 570 [2023-08-30 04:17:30,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 230.33333333333334) internal successors, (1382), 6 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:30,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:30,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 570 [2023-08-30 04:17:30,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:32,477 INFO L130 PetriNetUnfolder]: 20359/34156 cut-off events. [2023-08-30 04:17:32,478 INFO L131 PetriNetUnfolder]: For 994/994 co-relation queries the response was YES. [2023-08-30 04:17:32,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66258 conditions, 34156 events. 20359/34156 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 1365. Compared 297484 event pairs, 483 based on Foata normal form. 599/24449 useless extension candidates. Maximal degree in co-relation 66180. Up to 27190 conditions per place. [2023-08-30 04:17:32,792 INFO L137 encePairwiseOnDemand]: 559/570 looper letters, 183 selfloop transitions, 8 changer transitions 0/208 dead transitions. [2023-08-30 04:17:32,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 208 transitions, 936 flow [2023-08-30 04:17:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1565 transitions. [2023-08-30 04:17:32,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45760233918128657 [2023-08-30 04:17:32,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1565 transitions. [2023-08-30 04:17:32,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1565 transitions. [2023-08-30 04:17:32,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:32,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1565 transitions. [2023-08-30 04:17:32,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.8333333333333) internal successors, (1565), 6 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,805 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,805 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 332 flow. Second operand 6 states and 1565 transitions. [2023-08-30 04:17:32,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 208 transitions, 936 flow [2023-08-30 04:17:32,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 208 transitions, 888 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-30 04:17:32,811 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 294 flow [2023-08-30 04:17:32,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-08-30 04:17:32,812 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 12 predicate places. [2023-08-30 04:17:32,812 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 294 flow [2023-08-30 04:17:32,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 230.33333333333334) internal successors, (1382), 6 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:32,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:32,813 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:32,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:17:32,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:32,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:32,813 INFO L85 PathProgramCache]: Analyzing trace with hash 321867313, now seen corresponding path program 1 times [2023-08-30 04:17:32,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:32,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928028414] [2023-08-30 04:17:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:32,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:32,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:32,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928028414] [2023-08-30 04:17:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928028414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:32,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409341649] [2023-08-30 04:17:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:32,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:32,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:32,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:32,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 04:17:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:17:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:33,045 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 04:17:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:33,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:33,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409341649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:33,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:33,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-30 04:17:33,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458277585] [2023-08-30 04:17:33,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:33,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:17:33,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:17:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:17:33,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 570 [2023-08-30 04:17:33,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 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 04:17:33,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:33,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 570 [2023-08-30 04:17:33,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:35,521 INFO L130 PetriNetUnfolder]: 18370/29907 cut-off events. [2023-08-30 04:17:35,522 INFO L131 PetriNetUnfolder]: For 1450/1450 co-relation queries the response was YES. [2023-08-30 04:17:35,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60812 conditions, 29907 events. 18370/29907 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 244674 event pairs, 208 based on Foata normal form. 18/21698 useless extension candidates. Maximal degree in co-relation 60757. Up to 24425 conditions per place. [2023-08-30 04:17:35,809 INFO L137 encePairwiseOnDemand]: 564/570 looper letters, 170 selfloop transitions, 7 changer transitions 0/195 dead transitions. [2023-08-30 04:17:35,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 836 flow [2023-08-30 04:17:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:17:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:17:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1388 transitions. [2023-08-30 04:17:35,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870175438596491 [2023-08-30 04:17:35,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1388 transitions. [2023-08-30 04:17:35,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1388 transitions. [2023-08-30 04:17:35,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:35,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1388 transitions. [2023-08-30 04:17:35,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,819 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:35,819 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 294 flow. Second operand 5 states and 1388 transitions. [2023-08-30 04:17:35,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 836 flow [2023-08-30 04:17:35,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:17:35,834 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 307 flow [2023-08-30 04:17:35,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2023-08-30 04:17:35,835 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 15 predicate places. [2023-08-30 04:17:35,835 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 307 flow [2023-08-30 04:17:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.0) internal successors, (1722), 7 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 04:17:35,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:35,836 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:35,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:17:36,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:36,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:36,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1401598228, now seen corresponding path program 1 times [2023-08-30 04:17:36,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:36,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342987478] [2023-08-30 04:17:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:36,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:36,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:36,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342987478] [2023-08-30 04:17:36,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342987478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:36,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:36,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489149061] [2023-08-30 04:17:36,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:36,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:36,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:36,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 570 [2023-08-30 04:17:36,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 224.5) internal successors, (1347), 6 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:36,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:36,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 570 [2023-08-30 04:17:36,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:38,604 INFO L130 PetriNetUnfolder]: 17881/28666 cut-off events. [2023-08-30 04:17:38,604 INFO L131 PetriNetUnfolder]: For 3972/3972 co-relation queries the response was YES. [2023-08-30 04:17:38,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59645 conditions, 28666 events. 17881/28666 cut-off events. For 3972/3972 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 223452 event pairs, 4062 based on Foata normal form. 0/22030 useless extension candidates. Maximal degree in co-relation 59589. Up to 22482 conditions per place. [2023-08-30 04:17:38,922 INFO L137 encePairwiseOnDemand]: 555/570 looper letters, 186 selfloop transitions, 12 changer transitions 0/212 dead transitions. [2023-08-30 04:17:38,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 212 transitions, 947 flow [2023-08-30 04:17:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:17:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:17:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1309 transitions. [2023-08-30 04:17:38,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592982456140351 [2023-08-30 04:17:38,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1309 transitions. [2023-08-30 04:17:38,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1309 transitions. [2023-08-30 04:17:38,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:38,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1309 transitions. [2023-08-30 04:17:38,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 261.8) internal successors, (1309), 5 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:38,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:38,933 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 570.0) internal successors, (3420), 6 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:38,933 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 307 flow. Second operand 5 states and 1309 transitions. [2023-08-30 04:17:38,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 212 transitions, 947 flow [2023-08-30 04:17:38,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 212 transitions, 929 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 04:17:38,956 INFO L231 Difference]: Finished difference. Result has 122 places, 107 transitions, 377 flow [2023-08-30 04:17:38,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=122, PETRI_TRANSITIONS=107} [2023-08-30 04:17:38,957 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 19 predicate places. [2023-08-30 04:17:38,957 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 107 transitions, 377 flow [2023-08-30 04:17:38,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 224.5) internal successors, (1347), 6 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:38,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:38,958 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:38,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:17:38,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:38,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1401598592, now seen corresponding path program 1 times [2023-08-30 04:17:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:38,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848691275] [2023-08-30 04:17:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:38,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:39,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:39,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848691275] [2023-08-30 04:17:39,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848691275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:39,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:17:39,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:17:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655798176] [2023-08-30 04:17:39,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:17:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:17:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:17:39,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 570 [2023-08-30 04:17:39,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 107 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 232.5) internal successors, (1395), 6 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:39,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:39,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 570 [2023-08-30 04:17:39,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:42,743 INFO L130 PetriNetUnfolder]: 23922/39589 cut-off events. [2023-08-30 04:17:42,743 INFO L131 PetriNetUnfolder]: For 11581/11999 co-relation queries the response was YES. [2023-08-30 04:17:42,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89241 conditions, 39589 events. 23922/39589 cut-off events. For 11581/11999 co-relation queries the response was YES. Maximal size of possible extension queue 1503. Compared 335906 event pairs, 5065 based on Foata normal form. 44/30581 useless extension candidates. Maximal degree in co-relation 89181. Up to 20685 conditions per place. [2023-08-30 04:17:43,063 INFO L137 encePairwiseOnDemand]: 556/570 looper letters, 249 selfloop transitions, 32 changer transitions 0/300 dead transitions. [2023-08-30 04:17:43,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 300 transitions, 1490 flow [2023-08-30 04:17:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:17:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:17:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1877 transitions. [2023-08-30 04:17:43,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47042606516290725 [2023-08-30 04:17:43,067 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1877 transitions. [2023-08-30 04:17:43,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1877 transitions. [2023-08-30 04:17:43,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:43,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1877 transitions. [2023-08-30 04:17:43,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 268.14285714285717) internal successors, (1877), 7 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:43,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 570.0) internal successors, (4560), 8 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:43,075 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 570.0) internal successors, (4560), 8 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:43,075 INFO L175 Difference]: Start difference. First operand has 122 places, 107 transitions, 377 flow. Second operand 7 states and 1877 transitions. [2023-08-30 04:17:43,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 300 transitions, 1490 flow [2023-08-30 04:17:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 300 transitions, 1473 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:17:43,152 INFO L231 Difference]: Finished difference. Result has 131 places, 137 transitions, 643 flow [2023-08-30 04:17:43,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=643, PETRI_PLACES=131, PETRI_TRANSITIONS=137} [2023-08-30 04:17:43,153 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 28 predicate places. [2023-08-30 04:17:43,153 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 137 transitions, 643 flow [2023-08-30 04:17:43,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 232.5) internal successors, (1395), 6 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:43,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:43,154 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:43,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:17:43,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:43,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 870728499, now seen corresponding path program 1 times [2023-08-30 04:17:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845321183] [2023-08-30 04:17:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:43,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-30 04:17:43,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:43,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845321183] [2023-08-30 04:17:43,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845321183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:43,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85831596] [2023-08-30 04:17:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:43,343 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:43,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 04:17:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 04:17:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:17:43,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:17:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-30 04:17:43,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:17:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85831596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:17:43,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 04:17:43,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-30 04:17:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942618231] [2023-08-30 04:17:43,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:17:43,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:17:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:17:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-30 04:17:43,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 570 [2023-08-30 04:17:43,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 137 transitions, 643 flow. Second operand has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:43,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:43,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 570 [2023-08-30 04:17:43,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:17:46,717 INFO L130 PetriNetUnfolder]: 18203/31553 cut-off events. [2023-08-30 04:17:46,717 INFO L131 PetriNetUnfolder]: For 20209/20632 co-relation queries the response was YES. [2023-08-30 04:17:46,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79491 conditions, 31553 events. 18203/31553 cut-off events. For 20209/20632 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 269651 event pairs, 3456 based on Foata normal form. 2458/29565 useless extension candidates. Maximal degree in co-relation 79425. Up to 23572 conditions per place. [2023-08-30 04:17:47,005 INFO L137 encePairwiseOnDemand]: 553/570 looper letters, 210 selfloop transitions, 33 changer transitions 0/261 dead transitions. [2023-08-30 04:17:47,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 261 transitions, 1740 flow [2023-08-30 04:17:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:17:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:17:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1563 transitions. [2023-08-30 04:17:47,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570175438596491 [2023-08-30 04:17:47,008 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1563 transitions. [2023-08-30 04:17:47,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1563 transitions. [2023-08-30 04:17:47,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:17:47,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1563 transitions. [2023-08-30 04:17:47,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.5) internal successors, (1563), 6 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:47,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:47,015 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 570.0) internal successors, (3990), 7 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:47,016 INFO L175 Difference]: Start difference. First operand has 131 places, 137 transitions, 643 flow. Second operand 6 states and 1563 transitions. [2023-08-30 04:17:47,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 261 transitions, 1740 flow [2023-08-30 04:17:47,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 261 transitions, 1740 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:17:47,055 INFO L231 Difference]: Finished difference. Result has 135 places, 155 transitions, 913 flow [2023-08-30 04:17:47,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=913, PETRI_PLACES=135, PETRI_TRANSITIONS=155} [2023-08-30 04:17:47,056 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 32 predicate places. [2023-08-30 04:17:47,056 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 155 transitions, 913 flow [2023-08-30 04:17:47,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:47,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:17:47,056 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:17:47,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 04:17:47,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 04:17:47,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:17:47,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:17:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash 937885900, now seen corresponding path program 1 times [2023-08-30 04:17:47,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:17:47,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139912743] [2023-08-30 04:17:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:47,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:17:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:47,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:17:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139912743] [2023-08-30 04:17:47,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139912743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:17:47,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018884264] [2023-08-30 04:17:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:17:47,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:17:47,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:17:47,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 04:17:47,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 04:17:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:17:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 04:17:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:17:47,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-08-30 04:17:47,663 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 04:17:47,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-30 04:17:47,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 04:17:47,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 04:17:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 04:17:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:17:51,793 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_523 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_523) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2023-08-30 04:17:51,803 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_523 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_523) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2023-08-30 04:17:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2023-08-30 04:17:51,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018884264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:17:51,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:17:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-30 04:17:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331298265] [2023-08-30 04:17:51,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:17:51,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 04:17:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:17:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 04:17:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=81, Unknown=4, NotChecked=38, Total=156 [2023-08-30 04:17:51,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 570 [2023-08-30 04:17:51,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 155 transitions, 913 flow. Second operand has 13 states, 13 states have (on average 179.3846153846154) internal successors, (2332), 13 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:17:51,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:17:51,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 570 [2023-08-30 04:17:51,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:18:05,962 WARN L222 SmtUtils]: Spent 14.03s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 04:18:07,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:09,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:11,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:13,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:15,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:18,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:20,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:22,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:24,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:26,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:18:29,212 INFO L130 PetriNetUnfolder]: 19665/32897 cut-off events. [2023-08-30 04:18:29,212 INFO L131 PetriNetUnfolder]: For 31291/31291 co-relation queries the response was YES. [2023-08-30 04:18:29,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91287 conditions, 32897 events. 19665/32897 cut-off events. For 31291/31291 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 267368 event pairs, 7452 based on Foata normal form. 447/28922 useless extension candidates. Maximal degree in co-relation 91217. Up to 18238 conditions per place. [2023-08-30 04:18:29,532 INFO L137 encePairwiseOnDemand]: 553/570 looper letters, 248 selfloop transitions, 45 changer transitions 0/306 dead transitions. [2023-08-30 04:18:29,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 306 transitions, 2041 flow [2023-08-30 04:18:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:18:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:18:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1652 transitions. [2023-08-30 04:18:29,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362280701754386 [2023-08-30 04:18:29,536 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1652 transitions. [2023-08-30 04:18:29,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1652 transitions. [2023-08-30 04:18:29,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:18:29,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1652 transitions. [2023-08-30 04:18:29,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.5) internal successors, (1652), 8 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:29,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 570.0) internal successors, (5130), 9 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:29,542 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 570.0) internal successors, (5130), 9 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:29,543 INFO L175 Difference]: Start difference. First operand has 135 places, 155 transitions, 913 flow. Second operand 8 states and 1652 transitions. [2023-08-30 04:18:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 306 transitions, 2041 flow [2023-08-30 04:18:29,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 306 transitions, 2040 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:18:29,623 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1092 flow [2023-08-30 04:18:29,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=570, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1092, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2023-08-30 04:18:29,623 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, 41 predicate places. [2023-08-30 04:18:29,624 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1092 flow [2023-08-30 04:18:29,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 179.3846153846154) internal successors, (2332), 13 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:29,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:29,624 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-30 04:18:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 04:18:29,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:18:29,825 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-08-30 04:18:29,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1208874555, now seen corresponding path program 1 times [2023-08-30 04:18:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:29,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160270918] [2023-08-30 04:18:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:29,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:18:29,843 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:18:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:18:29,876 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:18:29,876 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:18:29,877 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-08-30 04:18:29,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-08-30 04:18:29,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-08-30 04:18:29,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-08-30 04:18:29,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-08-30 04:18:29,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (42 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-08-30 04:18:29,878 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-08-30 04:18:29,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-08-30 04:18:29,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-08-30 04:18:29,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-08-30 04:18:29,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2023-08-30 04:18:29,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-08-30 04:18:29,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-08-30 04:18:29,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2023-08-30 04:18:29,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-08-30 04:18:29,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-08-30 04:18:29,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-08-30 04:18:29,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-08-30 04:18:29,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-08-30 04:18:29,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-08-30 04:18:29,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-08-30 04:18:29,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2023-08-30 04:18:29,881 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-08-30 04:18:29,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-08-30 04:18:29,883 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-08-30 04:18:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-08-30 04:18:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-08-30 04:18:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-08-30 04:18:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-08-30 04:18:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-08-30 04:18:29,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-08-30 04:18:29,885 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2023-08-30 04:18:29,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 04:18:29,885 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:18:29,886 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:18:29,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:18:29,931 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:18:29,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-08-30 04:18:30,248 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-08-30 04:18:30,248 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-30 04:18:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 738 events. 110/738 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3676 event pairs, 1 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-30 04:18:30,260 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 378 transitions, 786 flow [2023-08-30 04:18:30,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 378 transitions, 786 flow [2023-08-30 04:18:30,271 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:18:30,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 378 transitions, 786 flow [2023-08-30 04:18:30,272 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 378 transitions, 786 flow [2023-08-30 04:18:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 378 transitions, 786 flow [2023-08-30 04:18:30,360 INFO L130 PetriNetUnfolder]: 110/738 cut-off events. [2023-08-30 04:18:30,360 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2023-08-30 04:18:30,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 738 events. 110/738 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3676 event pairs, 1 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 509. Up to 16 conditions per place. [2023-08-30 04:18:30,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 83304 [2023-08-30 04:18:35,097 INFO L134 LiptonReduction]: Checked pairs total: 181343 [2023-08-30 04:18:35,097 INFO L136 LiptonReduction]: Total number of compositions: 333 [2023-08-30 04:18:35,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:18:35,099 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;@2070239b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:18:35,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2023-08-30 04:18:35,101 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:18:35,101 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:18:35,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:18:35,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:18:35,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2023-08-30 04:18:35,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:18:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2293339, now seen corresponding path program 1 times [2023-08-30 04:18:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:18:35,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900613520] [2023-08-30 04:18:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:18:35,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:18:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:18:35,123 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 04:18:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:18:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900613520] [2023-08-30 04:18:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900613520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:18:35,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:18:35,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:18:35,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181126232] [2023-08-30 04:18:35,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:18:35,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:18:35,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:18:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:18:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:18:35,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 711 [2023-08-30 04:18:35,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:18:35,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:18:35,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 711 [2023-08-30 04:18:35,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand