./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.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_19-callback_racing.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 a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --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 04:08:26,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:08:26,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:08:26,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:08:26,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:08:26,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:08:26,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:08:26,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:08:26,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:08:26,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:08:26,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:08:26,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:08:26,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:08:26,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:08:26,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:08:26,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:08:26,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:08:26,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:08:26,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:08:26,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:08:26,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:08:26,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:08:26,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:08:26,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:08:26,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:08:26,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:08:26,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:08:26,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:08:26,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:08:26,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:08:26,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:08:26,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:08:26,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:08:26,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:08:26,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:08:26,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:08:26,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:08:26,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:08:26,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:08:26,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:08:26,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:08:26,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:08:26,486 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:08:26,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:08:26,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:08:26,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:08:26,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:08:26,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:08:26,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:08:26,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:08:26,489 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:08:26,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:08:26,490 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:08:26,490 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:08:26,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:08:26,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:08:26,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:08:26,491 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:08:26,491 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:08:26,492 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:08:26,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:08:26,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:08:26,492 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:08:26,492 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:08:26,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:08:26,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:08:26,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:08:26,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:08:26,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:08:26,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:08:26,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:08:26,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:08:26,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:08:26,494 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:08:26,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:08:26,495 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:08:26,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:08:26,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:08:26,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:08:26,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:08:26,817 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:08:26,818 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:08:26,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 04:08:27,859 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:08:28,176 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:08:28,177 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-30 04:08:28,189 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82f05499/3fec7f2b370a4c1f933378fcdb037da2/FLAG9f3377b81 [2023-08-30 04:08:28,202 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82f05499/3fec7f2b370a4c1f933378fcdb037da2 [2023-08-30 04:08:28,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:08:28,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:08:28,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:08:28,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:08:28,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:08:28,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f608b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28, skipping insertion in model container [2023-08-30 04:08:28,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:08:28,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:08:28,564 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_19-callback_racing.i[30212,30225] [2023-08-30 04:08:28,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:08:28,608 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:08:28,643 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_19-callback_racing.i[30212,30225] [2023-08-30 04:08:28,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:08:28,704 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 04:08:28,727 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:08:28,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28 WrapperNode [2023-08-30 04:08:28,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:08:28,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:08:28,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:08:28,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:08:28,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,811 INFO L138 Inliner]: procedures = 173, calls = 39, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2023-08-30 04:08:28,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:08:28,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:08:28,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:08:28,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:08:28,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:08:28,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:08:28,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:08:28,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:08:28,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (1/1) ... [2023-08-30 04:08:28,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:08:28,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:08:28,882 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 04:08:28,899 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 04:08:28,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 04:08:28,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 04:08:28,921 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 04:08:28,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:08:28,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:08:28,921 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-30 04:08:28,922 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-30 04:08:28,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:08:28,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 04:08:28,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:08:28,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:08:28,923 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 04:08:29,045 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:08:29,046 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:08:29,273 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:08:29,280 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:08:29,280 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-30 04:08:29,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:08:29 BoogieIcfgContainer [2023-08-30 04:08:29,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:08:29,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:08:29,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:08:29,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:08:29,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:08:28" (1/3) ... [2023-08-30 04:08:29,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b78a507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:08:29, skipping insertion in model container [2023-08-30 04:08:29,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:08:28" (2/3) ... [2023-08-30 04:08:29,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b78a507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:08:29, skipping insertion in model container [2023-08-30 04:08:29,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:08:29" (3/3) ... [2023-08-30 04:08:29,289 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-30 04:08:29,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:08:29,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-30 04:08:29,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:08:29,370 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-30 04:08:29,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 143 transitions, 294 flow [2023-08-30 04:08:29,514 INFO L130 PetriNetUnfolder]: 26/220 cut-off events. [2023-08-30 04:08:29,515 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:08:29,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 220 events. 26/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 623 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-08-30 04:08:29,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 143 transitions, 294 flow [2023-08-30 04:08:29,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 143 transitions, 294 flow [2023-08-30 04:08:29,529 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:08:29,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 143 transitions, 294 flow [2023-08-30 04:08:29,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 143 transitions, 294 flow [2023-08-30 04:08:29,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 143 transitions, 294 flow [2023-08-30 04:08:29,581 INFO L130 PetriNetUnfolder]: 26/220 cut-off events. [2023-08-30 04:08:29,581 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:08:29,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 220 events. 26/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 623 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-08-30 04:08:29,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 3320 [2023-08-30 04:08:33,037 INFO L134 LiptonReduction]: Checked pairs total: 5085 [2023-08-30 04:08:33,037 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-30 04:08:33,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:08:33,056 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;@1491d12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:08:33,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-30 04:08:33,058 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:08:33,059 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:08:33,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:33,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:33,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 04:08:33,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 17040, now seen corresponding path program 1 times [2023-08-30 04:08:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114759297] [2023-08-30 04:08:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:33,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:33,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:33,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114759297] [2023-08-30 04:08:33,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114759297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:33,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:33,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383631774] [2023-08-30 04:08:33,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:33,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:33,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:33,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:33,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 272 [2023-08-30 04:08:33,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:33,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 272 [2023-08-30 04:08:33,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:33,446 INFO L130 PetriNetUnfolder]: 95/224 cut-off events. [2023-08-30 04:08:33,446 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:08:33,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 224 events. 95/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 993 event pairs, 70 based on Foata normal form. 24/181 useless extension candidates. Maximal degree in co-relation 391. Up to 190 conditions per place. [2023-08-30 04:08:33,449 INFO L137 encePairwiseOnDemand]: 259/272 looper letters, 29 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-30 04:08:33,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 142 flow [2023-08-30 04:08:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-30 04:08:33,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2023-08-30 04:08:33,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-30 04:08:33,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-30 04:08:33,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:33,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-30 04:08:33,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,488 INFO L175 Difference]: Start difference. First operand has 32 places, 40 transitions, 88 flow. Second operand 3 states and 404 transitions. [2023-08-30 04:08:33,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 142 flow [2023-08-30 04:08:33,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:08:33,493 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 74 flow [2023-08-30 04:08:33,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-30 04:08:33,499 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-30 04:08:33,499 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 74 flow [2023-08-30 04:08:33,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:33,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 04:08:33,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 04:08:33,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:33,502 INFO L85 PathProgramCache]: Analyzing trace with hash 17041, now seen corresponding path program 1 times [2023-08-30 04:08:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848767267] [2023-08-30 04:08:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848767267] [2023-08-30 04:08:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848767267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:33,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:33,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002720572] [2023-08-30 04:08:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:33,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:33,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:33,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:33,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:33,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 272 [2023-08-30 04:08:33,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:33,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 272 [2023-08-30 04:08:33,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:33,741 INFO L130 PetriNetUnfolder]: 92/215 cut-off events. [2023-08-30 04:08:33,741 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 04:08:33,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 215 events. 92/215 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 928 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 405. Up to 195 conditions per place. [2023-08-30 04:08:33,743 INFO L137 encePairwiseOnDemand]: 268/272 looper letters, 31 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-30 04:08:33,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 152 flow [2023-08-30 04:08:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-30 04:08:33,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2023-08-30 04:08:33,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-30 04:08:33,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-30 04:08:33,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:33,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-30 04:08:33,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 272.0) internal successors, (1088), 4 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,750 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 74 flow. Second operand 3 states and 404 transitions. [2023-08-30 04:08:33,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 152 flow [2023-08-30 04:08:33,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:08:33,752 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 78 flow [2023-08-30 04:08:33,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-30 04:08:33,753 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-30 04:08:33,753 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 78 flow [2023-08-30 04:08:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:33,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:33,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 04:08:33,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 04:08:33,754 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 04:08:33,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 507982452, now seen corresponding path program 1 times [2023-08-30 04:08:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508861765] [2023-08-30 04:08:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:33,841 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 04:08:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508861765] [2023-08-30 04:08:33,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508861765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:08:33,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460807623] [2023-08-30 04:08:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:33,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:33,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:08:33,849 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 04:08:33,869 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 04:08:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:33,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:08:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:08:34,009 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 04:08:34,054 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 04:08:34,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:08:34,143 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 04:08:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460807623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:08:34,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:08:34,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:08:34,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253805819] [2023-08-30 04:08:34,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:08:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:08:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:08:34,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:08:34,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 272 [2023-08-30 04:08:34,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:34,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:34,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 272 [2023-08-30 04:08:34,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:34,261 INFO L130 PetriNetUnfolder]: 10/37 cut-off events. [2023-08-30 04:08:34,261 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-08-30 04:08:34,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 37 events. 10/37 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 94 event pairs, 0 based on Foata normal form. 6/40 useless extension candidates. Maximal degree in co-relation 67. Up to 22 conditions per place. [2023-08-30 04:08:34,262 INFO L137 encePairwiseOnDemand]: 268/272 looper letters, 13 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-08-30 04:08:34,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 75 flow [2023-08-30 04:08:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:08:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:08:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 497 transitions. [2023-08-30 04:08:34,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568014705882353 [2023-08-30 04:08:34,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 497 transitions. [2023-08-30 04:08:34,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 497 transitions. [2023-08-30 04:08:34,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:34,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 497 transitions. [2023-08-30 04:08:34,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.25) internal successors, (497), 4 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:34,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:34,269 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 272.0) internal successors, (1360), 5 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:34,269 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 78 flow. Second operand 4 states and 497 transitions. [2023-08-30 04:08:34,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 75 flow [2023-08-30 04:08:34,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:08:34,270 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 31 flow [2023-08-30 04:08:34,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=272, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-08-30 04:08:34,271 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -15 predicate places. [2023-08-30 04:08:34,271 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 31 flow [2023-08-30 04:08:34,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:34,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:34,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-30 04:08:34,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 04:08:34,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:34,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-30 04:08:34,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1432412862, now seen corresponding path program 1 times [2023-08-30 04:08:34,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:34,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719126245] [2023-08-30 04:08:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:34,493 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:08:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:34,515 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:08:34,516 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:08:34,517 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-30 04:08:34,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-30 04:08:34,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-30 04:08:34,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-30 04:08:34,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-30 04:08:34,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-08-30 04:08:34,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-08-30 04:08:34,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-08-30 04:08:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 04:08:34,523 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-30 04:08:34,526 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:08:34,526 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-30 04:08:34,545 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 04:08:34,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 348 flow [2023-08-30 04:08:34,575 INFO L130 PetriNetUnfolder]: 43/348 cut-off events. [2023-08-30 04:08:34,575 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:08:34,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 348 events. 43/348 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1263 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 222. Up to 9 conditions per place. [2023-08-30 04:08:34,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 348 flow [2023-08-30 04:08:34,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 348 flow [2023-08-30 04:08:34,579 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:08:34,579 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 165 transitions, 348 flow [2023-08-30 04:08:34,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 165 transitions, 348 flow [2023-08-30 04:08:34,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 348 flow [2023-08-30 04:08:34,622 INFO L130 PetriNetUnfolder]: 43/348 cut-off events. [2023-08-30 04:08:34,622 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 04:08:34,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 348 events. 43/348 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1263 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 222. Up to 9 conditions per place. [2023-08-30 04:08:34,628 INFO L119 LiptonReduction]: Number of co-enabled transitions 7880 [2023-08-30 04:08:38,015 INFO L134 LiptonReduction]: Checked pairs total: 12863 [2023-08-30 04:08:38,016 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-30 04:08:38,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:08:38,019 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;@1491d12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:08:38,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-30 04:08:38,020 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:08:38,020 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:08:38,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:38,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:38,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:08:38,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 27694, now seen corresponding path program 1 times [2023-08-30 04:08:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:38,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608384972] [2023-08-30 04:08:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:38,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608384972] [2023-08-30 04:08:38,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608384972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:38,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:38,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975960544] [2023-08-30 04:08:38,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:38,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:38,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:38,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-30 04:08:38,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 52 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:38,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-30 04:08:38,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:38,316 INFO L130 PetriNetUnfolder]: 1647/2698 cut-off events. [2023-08-30 04:08:38,316 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-30 04:08:38,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5416 conditions, 2698 events. 1647/2698 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13901 event pairs, 1332 based on Foata normal form. 57/2072 useless extension candidates. Maximal degree in co-relation 2016. Up to 2345 conditions per place. [2023-08-30 04:08:38,328 INFO L137 encePairwiseOnDemand]: 296/311 looper letters, 45 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-30 04:08:38,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 218 flow [2023-08-30 04:08:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-30 04:08:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058949624866024 [2023-08-30 04:08:38,330 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-30 04:08:38,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-30 04:08:38,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:38,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-30 04:08:38,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,335 INFO L175 Difference]: Start difference. First operand has 43 places, 52 transitions, 122 flow. Second operand 3 states and 472 transitions. [2023-08-30 04:08:38,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 218 flow [2023-08-30 04:08:38,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:08:38,351 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 104 flow [2023-08-30 04:08:38,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=3, PETRI_FLOW=104, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-30 04:08:38,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-30 04:08:38,354 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 104 flow [2023-08-30 04:08:38,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:38,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 04:08:38,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:08:38,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash 27695, now seen corresponding path program 1 times [2023-08-30 04:08:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970900580] [2023-08-30 04:08:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970900580] [2023-08-30 04:08:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970900580] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:38,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:38,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76742828] [2023-08-30 04:08:38,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:38,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:38,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:38,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 311 [2023-08-30 04:08:38,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:38,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 311 [2023-08-30 04:08:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:38,693 INFO L130 PetriNetUnfolder]: 1644/2697 cut-off events. [2023-08-30 04:08:38,693 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 04:08:38,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5537 conditions, 2697 events. 1644/2697 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13723 event pairs, 708 based on Foata normal form. 0/2076 useless extension candidates. Maximal degree in co-relation 4761. Up to 2645 conditions per place. [2023-08-30 04:08:38,704 INFO L137 encePairwiseOnDemand]: 307/311 looper letters, 42 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-30 04:08:38,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 208 flow [2023-08-30 04:08:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-30 04:08:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962486602357985 [2023-08-30 04:08:38,710 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-30 04:08:38,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-30 04:08:38,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:38,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-30 04:08:38,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,714 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 104 flow. Second operand 3 states and 463 transitions. [2023-08-30 04:08:38,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 208 flow [2023-08-30 04:08:38,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:08:38,717 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 112 flow [2023-08-30 04:08:38,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2023-08-30 04:08:38,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-30 04:08:38,718 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 112 flow [2023-08-30 04:08:38,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:38,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:38,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:08:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 04:08:38,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:08:38,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash -173724973, now seen corresponding path program 1 times [2023-08-30 04:08:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212703333] [2023-08-30 04:08:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:38,777 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 04:08:38,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212703333] [2023-08-30 04:08:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212703333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:08:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117186470] [2023-08-30 04:08:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:08:38,779 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 04:08:38,808 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 04:08:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:08:38,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:08:38,869 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 04:08:38,916 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 04:08:38,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:08:38,952 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 04:08:38,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117186470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:08:38,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:08:38,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:08:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425762525] [2023-08-30 04:08:38,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:08:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:08:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:08:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:08:39,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-30 04:08:39,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 112 flow. Second operand has 8 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:39,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-30 04:08:39,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:39,164 INFO L130 PetriNetUnfolder]: 222/449 cut-off events. [2023-08-30 04:08:39,164 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-30 04:08:39,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 449 events. 222/449 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1994 event pairs, 0 based on Foata normal form. 56/460 useless extension candidates. Maximal degree in co-relation 192. Up to 266 conditions per place. [2023-08-30 04:08:39,167 INFO L137 encePairwiseOnDemand]: 307/311 looper letters, 35 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-30 04:08:39,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 176 flow [2023-08-30 04:08:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:08:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:08:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-30 04:08:39,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46109324758842446 [2023-08-30 04:08:39,169 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-30 04:08:39,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-30 04:08:39,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:39,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-30 04:08:39,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,175 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,175 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 112 flow. Second operand 5 states and 717 transitions. [2023-08-30 04:08:39,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 176 flow [2023-08-30 04:08:39,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:08:39,177 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 62 flow [2023-08-30 04:08:39,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-30 04:08:39,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -13 predicate places. [2023-08-30 04:08:39,181 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 62 flow [2023-08-30 04:08:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 136.875) internal successors, (1095), 8 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:39,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:08:39,190 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 04:08:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-30 04:08:39,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:08:39,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -173510805, now seen corresponding path program 1 times [2023-08-30 04:08:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087851960] [2023-08-30 04:08:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087851960] [2023-08-30 04:08:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087851960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:39,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:39,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524114584] [2023-08-30 04:08:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:39,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:39,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 311 [2023-08-30 04:08:39,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:39,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 311 [2023-08-30 04:08:39,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:39,469 INFO L130 PetriNetUnfolder]: 160/297 cut-off events. [2023-08-30 04:08:39,469 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2023-08-30 04:08:39,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 297 events. 160/297 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1082 event pairs, 160 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 273. Up to 288 conditions per place. [2023-08-30 04:08:39,470 INFO L137 encePairwiseOnDemand]: 308/311 looper letters, 15 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-30 04:08:39,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 18 transitions, 90 flow [2023-08-30 04:08:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-30 04:08:39,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715969989281886 [2023-08-30 04:08:39,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-30 04:08:39,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-30 04:08:39,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:39,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-30 04:08:39,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,476 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 62 flow. Second operand 3 states and 440 transitions. [2023-08-30 04:08:39,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 18 transitions, 90 flow [2023-08-30 04:08:39,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 18 transitions, 83 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 04:08:39,477 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 53 flow [2023-08-30 04:08:39,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-08-30 04:08:39,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -16 predicate places. [2023-08-30 04:08:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 53 flow [2023-08-30 04:08:39,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-30 04:08:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 04:08:39,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-30 04:08:39,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash 9113946, now seen corresponding path program 1 times [2023-08-30 04:08:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476936457] [2023-08-30 04:08:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:39,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:39,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:08:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:39,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:08:39,521 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:08:39,522 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-30 04:08:39,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-30 04:08:39,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-30 04:08:39,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-30 04:08:39,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-30 04:08:39,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-08-30 04:08:39,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-08-30 04:08:39,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-08-30 04:08:39,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-08-30 04:08:39,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 04:08:39,524 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:08:39,524 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:08:39,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-30 04:08:39,541 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:08:39,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 404 flow [2023-08-30 04:08:39,583 INFO L130 PetriNetUnfolder]: 65/517 cut-off events. [2023-08-30 04:08:39,583 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:08:39,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2131 event pairs, 1 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 356. Up to 16 conditions per place. [2023-08-30 04:08:39,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 187 transitions, 404 flow [2023-08-30 04:08:39,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 187 transitions, 404 flow [2023-08-30 04:08:39,588 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:08:39,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 187 transitions, 404 flow [2023-08-30 04:08:39,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 187 transitions, 404 flow [2023-08-30 04:08:39,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 187 transitions, 404 flow [2023-08-30 04:08:39,623 INFO L130 PetriNetUnfolder]: 65/517 cut-off events. [2023-08-30 04:08:39,624 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-30 04:08:39,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 517 events. 65/517 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2131 event pairs, 1 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 356. Up to 16 conditions per place. [2023-08-30 04:08:39,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 13200 [2023-08-30 04:08:42,946 INFO L134 LiptonReduction]: Checked pairs total: 22061 [2023-08-30 04:08:42,947 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-30 04:08:42,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:08:42,949 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;@1491d12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:08:42,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-30 04:08:42,950 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 04:08:42,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:08:42,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:42,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:42,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:08:42,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash 39692, now seen corresponding path program 1 times [2023-08-30 04:08:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938364642] [2023-08-30 04:08:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938364642] [2023-08-30 04:08:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938364642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:42,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509863090] [2023-08-30 04:08:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:43,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:43,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:43,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 353 [2023-08-30 04:08:43,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:43,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:43,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 353 [2023-08-30 04:08:43,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:44,887 INFO L130 PetriNetUnfolder]: 17381/24922 cut-off events. [2023-08-30 04:08:44,887 INFO L131 PetriNetUnfolder]: For 668/668 co-relation queries the response was YES. [2023-08-30 04:08:44,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50053 conditions, 24922 events. 17381/24922 cut-off events. For 668/668 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 151971 event pairs, 10939 based on Foata normal form. 1482/19878 useless extension candidates. Maximal degree in co-relation 6040. Up to 24664 conditions per place. [2023-08-30 04:08:45,031 INFO L137 encePairwiseOnDemand]: 336/353 looper letters, 51 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-30 04:08:45,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 252 flow [2023-08-30 04:08:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-30 04:08:45,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051935788479698 [2023-08-30 04:08:45,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-30 04:08:45,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-30 04:08:45,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:45,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-30 04:08:45,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:45,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:45,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:45,039 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 158 flow. Second operand 3 states and 535 transitions. [2023-08-30 04:08:45,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 252 flow [2023-08-30 04:08:45,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:08:45,044 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 144 flow [2023-08-30 04:08:45,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-08-30 04:08:45,047 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-30 04:08:45,048 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 144 flow [2023-08-30 04:08:45,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:45,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:45,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:45,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 04:08:45,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:08:45,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 39691, now seen corresponding path program 1 times [2023-08-30 04:08:45,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900548156] [2023-08-30 04:08:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:45,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:45,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:45,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900548156] [2023-08-30 04:08:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900548156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:45,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:45,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192105196] [2023-08-30 04:08:45,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:45,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:45,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 353 [2023-08-30 04:08:45,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:45,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:45,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 353 [2023-08-30 04:08:45,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:46,747 INFO L130 PetriNetUnfolder]: 15564/22310 cut-off events. [2023-08-30 04:08:46,747 INFO L131 PetriNetUnfolder]: For 1333/1333 co-relation queries the response was YES. [2023-08-30 04:08:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45868 conditions, 22310 events. 15564/22310 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 135573 event pairs, 12833 based on Foata normal form. 0/17240 useless extension candidates. Maximal degree in co-relation 45816. Up to 19184 conditions per place. [2023-08-30 04:08:46,857 INFO L137 encePairwiseOnDemand]: 348/353 looper letters, 58 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-30 04:08:46,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 296 flow [2023-08-30 04:08:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-30 04:08:46,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48914069877242683 [2023-08-30 04:08:46,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-30 04:08:46,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-30 04:08:46,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:46,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-30 04:08:46,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:46,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:46,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:46,864 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 144 flow. Second operand 3 states and 518 transitions. [2023-08-30 04:08:46,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 296 flow [2023-08-30 04:08:46,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:08:46,868 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 144 flow [2023-08-30 04:08:46,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-30 04:08:46,869 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2023-08-30 04:08:46,869 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 144 flow [2023-08-30 04:08:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:46,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:46,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:08:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 04:08:46,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:08:46,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1968297160, now seen corresponding path program 1 times [2023-08-30 04:08:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798709143] [2023-08-30 04:08:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:46,954 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 04:08:46,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798709143] [2023-08-30 04:08:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798709143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:08:46,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800224302] [2023-08-30 04:08:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:08:46,957 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 04:08:46,984 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 04:08:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:08:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:08:47,042 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 04:08:47,079 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 04:08:47,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:08:47,121 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 04:08:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800224302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:08:47,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:08:47,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-30 04:08:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381010164] [2023-08-30 04:08:47,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:08:47,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 04:08:47,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 04:08:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 04:08:47,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 353 [2023-08-30 04:08:47,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 144 flow. Second operand has 8 states, 8 states have (on average 152.875) internal successors, (1223), 8 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:47,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:47,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 353 [2023-08-30 04:08:47,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:47,599 INFO L130 PetriNetUnfolder]: 2182/3554 cut-off events. [2023-08-30 04:08:47,600 INFO L131 PetriNetUnfolder]: For 1356/1356 co-relation queries the response was YES. [2023-08-30 04:08:47,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8185 conditions, 3554 events. 2182/3554 cut-off events. For 1356/1356 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20674 event pairs, 0 based on Foata normal form. 342/3455 useless extension candidates. Maximal degree in co-relation 8174. Up to 2086 conditions per place. [2023-08-30 04:08:47,620 INFO L137 encePairwiseOnDemand]: 349/353 looper letters, 57 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-30 04:08:47,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 281 flow [2023-08-30 04:08:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:08:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:08:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 973 transitions. [2023-08-30 04:08:47,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45939565627950896 [2023-08-30 04:08:47,623 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 973 transitions. [2023-08-30 04:08:47,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 973 transitions. [2023-08-30 04:08:47,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:47,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 973 transitions. [2023-08-30 04:08:47,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.16666666666666) internal successors, (973), 6 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:47,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:47,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 353.0) internal successors, (2471), 7 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:47,630 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 144 flow. Second operand 6 states and 973 transitions. [2023-08-30 04:08:47,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 281 flow [2023-08-30 04:08:47,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 274 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 04:08:47,634 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 88 flow [2023-08-30 04:08:47,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2023-08-30 04:08:47,635 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -12 predicate places. [2023-08-30 04:08:47,635 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 88 flow [2023-08-30 04:08:47,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.875) internal successors, (1223), 8 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:47,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:47,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:08:47,645 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 04:08:47,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:08:47,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:08:47,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1968018230, now seen corresponding path program 1 times [2023-08-30 04:08:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:47,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199954258] [2023-08-30 04:08:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:47,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:47,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:47,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199954258] [2023-08-30 04:08:47,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199954258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:47,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:47,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:47,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104753647] [2023-08-30 04:08:47,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:47,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:47,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:47,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 353 [2023-08-30 04:08:47,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:47,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:47,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 353 [2023-08-30 04:08:47,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:08:48,101 INFO L130 PetriNetUnfolder]: 1312/2006 cut-off events. [2023-08-30 04:08:48,102 INFO L131 PetriNetUnfolder]: For 742/742 co-relation queries the response was YES. [2023-08-30 04:08:48,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4532 conditions, 2006 events. 1312/2006 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9492 event pairs, 1312 based on Foata normal form. 0/2006 useless extension candidates. Maximal degree in co-relation 4520. Up to 1959 conditions per place. [2023-08-30 04:08:48,110 INFO L137 encePairwiseOnDemand]: 349/353 looper letters, 21 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-30 04:08:48,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 25 transitions, 126 flow [2023-08-30 04:08:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:08:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:08:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-30 04:08:48,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664778092540132 [2023-08-30 04:08:48,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-30 04:08:48,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-30 04:08:48,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:08:48,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-30 04:08:48,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:48,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:48,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 353.0) internal successors, (1412), 4 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:48,116 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 88 flow. Second operand 3 states and 494 transitions. [2023-08-30 04:08:48,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 25 transitions, 126 flow [2023-08-30 04:08:48,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 117 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 04:08:48,118 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 75 flow [2023-08-30 04:08:48,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=353, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-30 04:08:48,119 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -16 predicate places. [2023-08-30 04:08:48,119 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 75 flow [2023-08-30 04:08:48,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:48,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:48,119 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-30 04:08:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 04:08:48,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-30 04:08:48,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash -234001852, now seen corresponding path program 1 times [2023-08-30 04:08:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641177034] [2023-08-30 04:08:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:48,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:08:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:08:48,151 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:08:48,151 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:08:48,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-30 04:08:48,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-30 04:08:48,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-30 04:08:48,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-30 04:08:48,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-30 04:08:48,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-08-30 04:08:48,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-08-30 04:08:48,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-08-30 04:08:48,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-08-30 04:08:48,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-08-30 04:08:48,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 04:08:48,152 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-30 04:08:48,153 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:08:48,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-30 04:08:48,175 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 04:08:48,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 462 flow [2023-08-30 04:08:48,238 INFO L130 PetriNetUnfolder]: 99/770 cut-off events. [2023-08-30 04:08:48,239 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:08:48,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 770 events. 99/770 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3551 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-08-30 04:08:48,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 462 flow [2023-08-30 04:08:48,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 209 transitions, 462 flow [2023-08-30 04:08:48,247 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:08:48,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 209 transitions, 462 flow [2023-08-30 04:08:48,247 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 209 transitions, 462 flow [2023-08-30 04:08:48,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 462 flow [2023-08-30 04:08:48,307 INFO L130 PetriNetUnfolder]: 99/770 cut-off events. [2023-08-30 04:08:48,308 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-30 04:08:48,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 770 events. 99/770 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3551 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2023-08-30 04:08:48,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 19440 [2023-08-30 04:08:51,775 INFO L134 LiptonReduction]: Checked pairs total: 38026 [2023-08-30 04:08:51,775 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-08-30 04:08:51,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:08:51,777 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;@1491d12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:08:51,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-30 04:08:51,778 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-30 04:08:51,778 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:08:51,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:08:51,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:08:51,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:08:51,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:08:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash 52910, now seen corresponding path program 1 times [2023-08-30 04:08:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:08:51,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711782904] [2023-08-30 04:08:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:08:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:08:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:08:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:08:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:08:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711782904] [2023-08-30 04:08:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711782904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:08:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:08:51,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:08:51,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925397377] [2023-08-30 04:08:51,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:08:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:08:51,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:08:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:08:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:08:51,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 391 [2023-08-30 04:08:51,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 76 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:08:51,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:08:51,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 391 [2023-08-30 04:08:51,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:02,885 INFO L130 PetriNetUnfolder]: 133902/184202 cut-off events. [2023-08-30 04:09:02,885 INFO L131 PetriNetUnfolder]: For 8156/8156 co-relation queries the response was YES. [2023-08-30 04:09:03,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365086 conditions, 184202 events. 133902/184202 cut-off events. For 8156/8156 co-relation queries the response was YES. Maximal size of possible extension queue 6145. Compared 1360174 event pairs, 110783 based on Foata normal form. 21057/156333 useless extension candidates. Maximal degree in co-relation 46620. Up to 151693 conditions per place. [2023-08-30 04:09:03,997 INFO L137 encePairwiseOnDemand]: 370/391 looper letters, 69 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-30 04:09:03,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 346 flow [2023-08-30 04:09:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2023-08-30 04:09:04,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514919011082694 [2023-08-30 04:09:04,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2023-08-30 04:09:04,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2023-08-30 04:09:04,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:04,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2023-08-30 04:09:04,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:04,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:04,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:04,010 INFO L175 Difference]: Start difference. First operand has 63 places, 76 transitions, 196 flow. Second operand 3 states and 604 transitions. [2023-08-30 04:09:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 346 flow [2023-08-30 04:09:04,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 346 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 04:09:04,020 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 164 flow [2023-08-30 04:09:04,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-30 04:09:04,021 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2023-08-30 04:09:04,021 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 164 flow [2023-08-30 04:09:04,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:04,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:04,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:09:04,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 04:09:04,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:09:04,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash 52911, now seen corresponding path program 1 times [2023-08-30 04:09:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:04,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860014632] [2023-08-30 04:09:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:04,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:09:04,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:04,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860014632] [2023-08-30 04:09:04,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860014632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:04,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:04,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642491249] [2023-08-30 04:09:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:04,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:04,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:04,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 391 [2023-08-30 04:09:04,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:04,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:04,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 391 [2023-08-30 04:09:04,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:14,631 INFO L130 PetriNetUnfolder]: 133899/184787 cut-off events. [2023-08-30 04:09:14,631 INFO L131 PetriNetUnfolder]: For 10215/10215 co-relation queries the response was YES. [2023-08-30 04:09:14,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371933 conditions, 184787 events. 133899/184787 cut-off events. For 10215/10215 co-relation queries the response was YES. Maximal size of possible extension queue 6228. Compared 1359300 event pairs, 94813 based on Foata normal form. 0/139345 useless extension candidates. Maximal degree in co-relation 315531. Up to 176313 conditions per place. [2023-08-30 04:09:15,560 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 56 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-30 04:09:15,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 296 flow [2023-08-30 04:09:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-08-30 04:09:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4884910485933504 [2023-08-30 04:09:15,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-08-30 04:09:15,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-08-30 04:09:15,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:15,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-08-30 04:09:15,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:15,567 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 164 flow. Second operand 3 states and 573 transitions. [2023-08-30 04:09:15,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 296 flow [2023-08-30 04:09:16,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:09:16,836 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 172 flow [2023-08-30 04:09:16,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-30 04:09:16,836 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-08-30 04:09:16,836 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 172 flow [2023-08-30 04:09:16,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:16,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 04:09:16,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:09:16,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1662217613, now seen corresponding path program 1 times [2023-08-30 04:09:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697292892] [2023-08-30 04:09:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:09:16,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697292892] [2023-08-30 04:09:16,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697292892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:16,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:16,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:09:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886795106] [2023-08-30 04:09:16,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:16,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:16,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:16,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 391 [2023-08-30 04:09:16,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:16,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:16,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 391 [2023-08-30 04:09:16,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:29,598 INFO L130 PetriNetUnfolder]: 162826/225896 cut-off events. [2023-08-30 04:09:29,599 INFO L131 PetriNetUnfolder]: For 8819/8819 co-relation queries the response was YES. [2023-08-30 04:09:30,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450981 conditions, 225896 events. 162826/225896 cut-off events. For 8819/8819 co-relation queries the response was YES. Maximal size of possible extension queue 5947. Compared 1652917 event pairs, 75212 based on Foata normal form. 0/178821 useless extension candidates. Maximal degree in co-relation 450929. Up to 137009 conditions per place. [2023-08-30 04:09:30,959 INFO L137 encePairwiseOnDemand]: 382/391 looper letters, 83 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-08-30 04:09:30,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 430 flow [2023-08-30 04:09:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:09:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:09:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 610 transitions. [2023-08-30 04:09:30,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200341005967605 [2023-08-30 04:09:30,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 610 transitions. [2023-08-30 04:09:30,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 610 transitions. [2023-08-30 04:09:30,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:30,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 610 transitions. [2023-08-30 04:09:30,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:30,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:30,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:30,967 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 172 flow. Second operand 3 states and 610 transitions. [2023-08-30 04:09:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 430 flow [2023-08-30 04:09:30,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:09:30,973 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 208 flow [2023-08-30 04:09:30,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-30 04:09:30,974 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-30 04:09:30,974 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 208 flow [2023-08-30 04:09:30,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:30,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:30,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 04:09:30,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 04:09:30,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:09:30,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1661932828, now seen corresponding path program 1 times [2023-08-30 04:09:30,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:30,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684268351] [2023-08-30 04:09:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:31,027 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 04:09:31,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684268351] [2023-08-30 04:09:31,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684268351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:09:31,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130762663] [2023-08-30 04:09:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:31,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:09:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:09:31,033 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 04:09:31,039 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 04:09:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:09:31,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:09:31,110 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 04:09:31,134 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 04:09:31,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:09:31,164 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 04:09:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130762663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:09:31,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:09:31,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-30 04:09:31,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848784311] [2023-08-30 04:09:31,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:09:31,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 04:09:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 04:09:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-30 04:09:31,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 391 [2023-08-30 04:09:31,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:31,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:31,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 391 [2023-08-30 04:09:31,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:09:44,406 INFO L130 PetriNetUnfolder]: 169041/234474 cut-off events. [2023-08-30 04:09:44,406 INFO L131 PetriNetUnfolder]: For 41531/41531 co-relation queries the response was YES. [2023-08-30 04:09:45,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515190 conditions, 234474 events. 169041/234474 cut-off events. For 41531/41531 co-relation queries the response was YES. Maximal size of possible extension queue 6080. Compared 1740030 event pairs, 28839 based on Foata normal form. 6/204135 useless extension candidates. Maximal degree in co-relation 127199. Up to 197691 conditions per place. [2023-08-30 04:09:45,812 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 142 selfloop transitions, 10 changer transitions 0/159 dead transitions. [2023-08-30 04:09:45,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 159 transitions, 771 flow [2023-08-30 04:09:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:09:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:09:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1157 transitions. [2023-08-30 04:09:45,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49317988064791135 [2023-08-30 04:09:45,815 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1157 transitions. [2023-08-30 04:09:45,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1157 transitions. [2023-08-30 04:09:45,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:09:45,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1157 transitions. [2023-08-30 04:09:45,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:45,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:45,822 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:45,822 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 208 flow. Second operand 6 states and 1157 transitions. [2023-08-30 04:09:45,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 159 transitions, 771 flow [2023-08-30 04:09:45,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 159 transitions, 755 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:09:45,894 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 270 flow [2023-08-30 04:09:45,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2023-08-30 04:09:45,895 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-30 04:09:45,895 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 270 flow [2023-08-30 04:09:45,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:45,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:09:45,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-30 04:09:45,905 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 04:09:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 04:09:46,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:09:46,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:09:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1206076355, now seen corresponding path program 1 times [2023-08-30 04:09:46,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:09:46,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635510155] [2023-08-30 04:09:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:09:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:09:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:09:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:09:46,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:09:46,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635510155] [2023-08-30 04:09:46,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635510155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:09:46,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:09:46,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:09:46,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207560894] [2023-08-30 04:09:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:09:46,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:09:46,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:09:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:09:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:09:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 391 [2023-08-30 04:09:46,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:09:46,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:09:46,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 391 [2023-08-30 04:09:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:06,042 INFO L130 PetriNetUnfolder]: 220673/307194 cut-off events. [2023-08-30 04:10:06,042 INFO L131 PetriNetUnfolder]: For 53582/53582 co-relation queries the response was YES. [2023-08-30 04:10:06,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684177 conditions, 307194 events. 220673/307194 cut-off events. For 53582/53582 co-relation queries the response was YES. Maximal size of possible extension queue 8655. Compared 2349377 event pairs, 148647 based on Foata normal form. 0/273090 useless extension candidates. Maximal degree in co-relation 89023. Up to 229574 conditions per place. [2023-08-30 04:10:08,036 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 91 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-08-30 04:10:08,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 544 flow [2023-08-30 04:10:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:10:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:10:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 598 transitions. [2023-08-30 04:10:08,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-08-30 04:10:08,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 598 transitions. [2023-08-30 04:10:08,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 598 transitions. [2023-08-30 04:10:08,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:08,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 598 transitions. [2023-08-30 04:10:08,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:08,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:08,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:08,043 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 270 flow. Second operand 3 states and 598 transitions. [2023-08-30 04:10:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 544 flow [2023-08-30 04:10:08,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 540 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 04:10:08,073 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 285 flow [2023-08-30 04:10:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=285, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-08-30 04:10:08,074 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2023-08-30 04:10:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 285 flow [2023-08-30 04:10:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:10:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 04:10:08,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:10:08,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1266421032, now seen corresponding path program 1 times [2023-08-30 04:10:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4916503] [2023-08-30 04:10:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-30 04:10:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4916503] [2023-08-30 04:10:08,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4916503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:10:08,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433913016] [2023-08-30 04:10:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:08,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:08,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:10:08,120 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 04:10:08,122 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 04:10:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:08,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:10:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:10:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:10:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:10:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 04:10:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433913016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:10:08,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:10:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-30 04:10:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101311381] [2023-08-30 04:10:08,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:10:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 04:10:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 04:10:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-30 04:10:08,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 391 [2023-08-30 04:10:08,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 285 flow. Second operand has 10 states, 10 states have (on average 169.7) internal successors, (1697), 10 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:08,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:08,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 391 [2023-08-30 04:10:08,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:09,236 INFO L130 PetriNetUnfolder]: 9784/14347 cut-off events. [2023-08-30 04:10:09,236 INFO L131 PetriNetUnfolder]: For 14856/14856 co-relation queries the response was YES. [2023-08-30 04:10:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39363 conditions, 14347 events. 9784/14347 cut-off events. For 14856/14856 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 87509 event pairs, 0 based on Foata normal form. 900/15246 useless extension candidates. Maximal degree in co-relation 39349. Up to 9108 conditions per place. [2023-08-30 04:10:09,295 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 72 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2023-08-30 04:10:09,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 402 flow [2023-08-30 04:10:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:10:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:10:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1249 transitions. [2023-08-30 04:10:09,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45633905736207525 [2023-08-30 04:10:09,298 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1249 transitions. [2023-08-30 04:10:09,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1249 transitions. [2023-08-30 04:10:09,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:09,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1249 transitions. [2023-08-30 04:10:09,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 178.42857142857142) internal successors, (1249), 7 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:09,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:09,306 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:09,306 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 285 flow. Second operand 7 states and 1249 transitions. [2023-08-30 04:10:09,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 402 flow [2023-08-30 04:10:09,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 378 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 04:10:09,328 INFO L231 Difference]: Finished difference. Result has 57 places, 34 transitions, 132 flow [2023-08-30 04:10:09,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2023-08-30 04:10:09,329 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-08-30 04:10:09,329 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 132 flow [2023-08-30 04:10:09,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.7) internal successors, (1697), 10 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:09,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:09,331 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:10:09,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:10:09,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:09,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:10:09,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 858410397, now seen corresponding path program 1 times [2023-08-30 04:10:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593755631] [2023-08-30 04:10:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:09,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:09,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593755631] [2023-08-30 04:10:09,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593755631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 04:10:09,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093960647] [2023-08-30 04:10:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:09,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:09,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:10:09,707 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 04:10:09,708 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 04:10:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:09,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 04:10:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:10:09,787 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 04:10:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:09,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:10:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:10:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093960647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:10:10,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 04:10:10,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-30 04:10:10,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115746780] [2023-08-30 04:10:10,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 04:10:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 04:10:10,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 04:10:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-08-30 04:10:10,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 391 [2023-08-30 04:10:10,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 132 flow. Second operand has 16 states, 16 states have (on average 170.4375) internal successors, (2727), 16 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:10,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:10,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 391 [2023-08-30 04:10:10,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:10:11,168 INFO L130 PetriNetUnfolder]: 7468/11311 cut-off events. [2023-08-30 04:10:11,169 INFO L131 PetriNetUnfolder]: For 7782/7782 co-relation queries the response was YES. [2023-08-30 04:10:11,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27141 conditions, 11311 events. 7468/11311 cut-off events. For 7782/7782 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 69685 event pairs, 0 based on Foata normal form. 720/12030 useless extension candidates. Maximal degree in co-relation 27127. Up to 6072 conditions per place. [2023-08-30 04:10:11,212 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 71 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-30 04:10:11,213 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 376 flow [2023-08-30 04:10:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 04:10:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 04:10:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1253 transitions. [2023-08-30 04:10:11,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578005115089514 [2023-08-30 04:10:11,216 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1253 transitions. [2023-08-30 04:10:11,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1253 transitions. [2023-08-30 04:10:11,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:10:11,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1253 transitions. [2023-08-30 04:10:11,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:11,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:11,223 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 391.0) internal successors, (3128), 8 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:11,223 INFO L175 Difference]: Start difference. First operand has 57 places, 34 transitions, 132 flow. Second operand 7 states and 1253 transitions. [2023-08-30 04:10:11,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 376 flow [2023-08-30 04:10:11,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 357 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 04:10:11,231 INFO L231 Difference]: Finished difference. Result has 53 places, 33 transitions, 113 flow [2023-08-30 04:10:11,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=113, PETRI_PLACES=53, PETRI_TRANSITIONS=33} [2023-08-30 04:10:11,231 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-08-30 04:10:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 33 transitions, 113 flow [2023-08-30 04:10:11,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 170.4375) internal successors, (2727), 16 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:11,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-30 04:10:11,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:10:11,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 04:10:11,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-30 04:10:11,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash 840919903, now seen corresponding path program 1 times [2023-08-30 04:10:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:11,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827257031] [2023-08-30 04:10:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:11,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:11,452 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 04:10:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 04:10:11,464 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 04:10:11,465 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 04:10:11,465 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-08-30 04:10:11,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-30 04:10:11,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-30 04:10:11,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-30 04:10:11,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-30 04:10:11,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2023-08-30 04:10:11,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2023-08-30 04:10:11,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2023-08-30 04:10:11,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2023-08-30 04:10:11,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2023-08-30 04:10:11,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2023-08-30 04:10:11,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 04:10:11,466 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:10:11,467 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-30 04:10:11,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-30 04:10:11,484 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-30 04:10:11,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 231 transitions, 522 flow [2023-08-30 04:10:11,595 INFO L130 PetriNetUnfolder]: 161/1195 cut-off events. [2023-08-30 04:10:11,595 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:10:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 1195 events. 161/1195 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6372 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 815. Up to 80 conditions per place. [2023-08-30 04:10:11,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 231 transitions, 522 flow [2023-08-30 04:10:11,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 231 transitions, 522 flow [2023-08-30 04:10:11,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:10:11,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 231 transitions, 522 flow [2023-08-30 04:10:11,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 231 transitions, 522 flow [2023-08-30 04:10:11,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 231 transitions, 522 flow [2023-08-30 04:10:11,692 INFO L130 PetriNetUnfolder]: 161/1195 cut-off events. [2023-08-30 04:10:11,693 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-30 04:10:11,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 1195 events. 161/1195 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6372 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 815. Up to 80 conditions per place. [2023-08-30 04:10:11,722 INFO L119 LiptonReduction]: Number of co-enabled transitions 26600 [2023-08-30 04:10:14,983 INFO L134 LiptonReduction]: Checked pairs total: 48681 [2023-08-30 04:10:14,983 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-08-30 04:10:14,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:10:14,985 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;@1491d12, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:10:14,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-30 04:10:14,986 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2023-08-30 04:10:14,986 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:10:14,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:10:14,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:10:14,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-30 04:10:14,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:10:14,987 INFO L85 PathProgramCache]: Analyzing trace with hash 67470, now seen corresponding path program 1 times [2023-08-30 04:10:14,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 04:10:14,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678982350] [2023-08-30 04:10:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:10:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 04:10:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:10:15,022 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 04:10:15,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 04:10:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678982350] [2023-08-30 04:10:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678982350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:10:15,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:10:15,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:10:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000637801] [2023-08-30 04:10:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:10:15,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:10:15,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 04:10:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:10:15,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:10:15,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 433 [2023-08-30 04:10:15,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:10:15,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:10:15,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 433 [2023-08-30 04:10:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand