./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 21:41:44,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 21:41:44,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 21:41:44,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 21:41:44,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 21:41:44,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 21:41:44,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 21:41:44,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 21:41:44,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 21:41:44,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 21:41:44,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 21:41:44,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 21:41:44,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 21:41:44,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 21:41:44,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 21:41:44,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 21:41:44,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 21:41:44,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 21:41:44,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 21:41:44,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 21:41:44,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 21:41:44,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 21:41:44,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 21:41:44,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 21:41:44,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 21:41:44,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 21:41:44,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 21:41:44,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 21:41:44,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 21:41:44,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 21:41:44,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 21:41:44,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 21:41:44,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 21:41:44,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 21:41:44,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 21:41:44,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 21:41:44,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 21:41:44,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 21:41:44,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 21:41:44,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 21:41:44,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 21:41:44,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 21:41:44,370 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 21:41:44,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 21:41:44,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 21:41:44,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 21:41:44,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 21:41:44,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 21:41:44,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 21:41:44,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 21:41:44,375 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 21:41:44,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 21:41:44,376 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 21:41:44,376 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 21:41:44,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 21:41:44,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 21:41:44,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 21:41:44,377 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 21:41:44,377 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 21:41:44,378 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 21:41:44,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 21:41:44,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 21:41:44,378 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 21:41:44,378 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 21:41:44,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 21:41:44,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 21:41:44,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 21:41:44,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:44,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 21:41:44,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 21:41:44,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 21:41:44,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 21:41:44,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 21:41:44,380 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 21:41:44,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 21:41:44,381 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 21:41:44,381 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 21:41:44,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 21:41:44,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 21:41:44,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 21:41:44,701 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 21:41:44,701 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 21:41:44,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-08-29 21:41:45,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 21:41:46,249 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 21:41:46,249 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-08-29 21:41:46,267 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9efd22194/503bb697e2e842f69a83a6f64192b194/FLAG75b171a8f [2023-08-29 21:41:46,287 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9efd22194/503bb697e2e842f69a83a6f64192b194 [2023-08-29 21:41:46,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 21:41:46,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 21:41:46,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:46,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 21:41:46,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 21:41:46,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7551cc24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46, skipping insertion in model container [2023-08-29 21:41:46,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 21:41:46,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 21:41:46,668 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_21-deref_read_racing.i[30176,30189] [2023-08-29 21:41:46,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:46,705 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 21:41:46,743 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_21-deref_read_racing.i[30176,30189] [2023-08-29 21:41:46,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 21:41:46,804 INFO L208 MainTranslator]: Completed translation [2023-08-29 21:41:46,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46 WrapperNode [2023-08-29 21:41:46,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 21:41:46,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:46,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 21:41:46,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 21:41:46,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,875 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-08-29 21:41:46,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 21:41:46,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 21:41:46,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 21:41:46,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 21:41:46,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,899 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 21:41:46,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 21:41:46,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 21:41:46,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 21:41:46,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (1/1) ... [2023-08-29 21:41:46,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 21:41:46,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:46,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 21:41:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 21:41:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 21:41:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 21:41:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 21:41:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 21:41:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 21:41:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-29 21:41:46,971 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-29 21:41:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 21:41:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 21:41:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 21:41:46,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 21:41:46,972 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 21:41:47,076 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 21:41:47,078 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 21:41:47,301 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 21:41:47,307 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 21:41:47,308 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-29 21:41:47,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:47 BoogieIcfgContainer [2023-08-29 21:41:47,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 21:41:47,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 21:41:47,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 21:41:47,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 21:41:47,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:41:46" (1/3) ... [2023-08-29 21:41:47,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29828747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:47, skipping insertion in model container [2023-08-29 21:41:47,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:41:46" (2/3) ... [2023-08-29 21:41:47,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29828747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:41:47, skipping insertion in model container [2023-08-29 21:41:47,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:41:47" (3/3) ... [2023-08-29 21:41:47,316 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-08-29 21:41:47,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 21:41:47,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-29 21:41:47,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 21:41:47,399 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:41:47,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:47,515 INFO L130 PetriNetUnfolder]: 14/148 cut-off events. [2023-08-29 21:41:47,516 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:47,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 14/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 412 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-29 21:41:47,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:47,532 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:47,535 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:47,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:47,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:47,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:47,602 INFO L130 PetriNetUnfolder]: 14/148 cut-off events. [2023-08-29 21:41:47,602 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:47,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 14/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 412 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-29 21:41:47,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 3280 [2023-08-29 21:41:50,730 INFO L134 LiptonReduction]: Checked pairs total: 7986 [2023-08-29 21:41:50,731 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-29 21:41:50,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:50,760 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:50,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-29 21:41:50,763 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:41:50,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:50,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:50,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:41:50,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash 14018, now seen corresponding path program 1 times [2023-08-29 21:41:50,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:50,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790290334] [2023-08-29 21:41:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:51,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:51,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790290334] [2023-08-29 21:41:51,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790290334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:51,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:51,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:51,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131291738] [2023-08-29 21:41:51,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:51,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 212 [2023-08-29 21:41:51,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:51,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 212 [2023-08-29 21:41:51,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:51,296 INFO L130 PetriNetUnfolder]: 156/372 cut-off events. [2023-08-29 21:41:51,301 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:51,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 372 events. 156/372 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2031 event pairs, 0 based on Foata normal form. 14/264 useless extension candidates. Maximal degree in co-relation 692. Up to 326 conditions per place. [2023-08-29 21:41:51,309 INFO L137 encePairwiseOnDemand]: 198/212 looper letters, 39 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-29 21:41:51,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 183 flow [2023-08-29 21:41:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-29 21:41:51,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487421383647799 [2023-08-29 21:41:51,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-29 21:41:51,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-29 21:41:51,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:51,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-29 21:41:51,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,334 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 93 flow. Second operand 3 states and 349 transitions. [2023-08-29 21:41:51,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 183 flow [2023-08-29 21:41:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 183 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:51,338 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 83 flow [2023-08-29 21:41:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-29 21:41:51,342 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-29 21:41:51,343 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 83 flow [2023-08-29 21:41:51,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:51,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:51,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 21:41:51,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:41:51,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:51,345 INFO L85 PathProgramCache]: Analyzing trace with hash 14016, now seen corresponding path program 1 times [2023-08-29 21:41:51,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:51,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564215273] [2023-08-29 21:41:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564215273] [2023-08-29 21:41:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564215273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:51,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058448964] [2023-08-29 21:41:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:51,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:51,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 212 [2023-08-29 21:41:51,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:51,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 212 [2023-08-29 21:41:51,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:51,529 INFO L130 PetriNetUnfolder]: 144/354 cut-off events. [2023-08-29 21:41:51,529 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-08-29 21:41:51,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 354 events. 144/354 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1756 event pairs, 108 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 711. Up to 240 conditions per place. [2023-08-29 21:41:51,532 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-29 21:41:51,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 181 flow [2023-08-29 21:41:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-29 21:41:51,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-29 21:41:51,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-29 21:41:51,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-29 21:41:51,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:51,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-29 21:41:51,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,539 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 83 flow. Second operand 3 states and 324 transitions. [2023-08-29 21:41:51,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 181 flow [2023-08-29 21:41:51,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:51,541 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 81 flow [2023-08-29 21:41:51,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-29 21:41:51,542 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-29 21:41:51,542 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 81 flow [2023-08-29 21:41:51,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:51,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:51,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 21:41:51,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 21:41:51,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:41:51,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:51,544 INFO L85 PathProgramCache]: Analyzing trace with hash 417891073, now seen corresponding path program 1 times [2023-08-29 21:41:51,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:51,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895460586] [2023-08-29 21:41:51,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:51,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895460586] [2023-08-29 21:41:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895460586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:41:51,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934835965] [2023-08-29 21:41:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:51,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:41:51,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:41:51,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:41:51,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 21:41:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:41:51,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:41:51,821 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 [2023-08-29 21:41:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:51,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:41:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:51,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934835965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:41:51,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:41:51,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:41:51,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786040059] [2023-08-29 21:41:51,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:41:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:41:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:41:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:41:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 212 [2023-08-29 21:41:52,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 81 flow. Second operand has 8 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:52,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 212 [2023-08-29 21:41:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:52,232 INFO L130 PetriNetUnfolder]: 24/83 cut-off events. [2023-08-29 21:41:52,232 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:52,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 83 events. 24/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 268 event pairs, 0 based on Foata normal form. 13/86 useless extension candidates. Maximal degree in co-relation 174. Up to 50 conditions per place. [2023-08-29 21:41:52,233 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-29 21:41:52,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 137 flow [2023-08-29 21:41:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:41:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:41:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2023-08-29 21:41:52,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705188679245283 [2023-08-29 21:41:52,236 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2023-08-29 21:41:52,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2023-08-29 21:41:52,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:52,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2023-08-29 21:41:52,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,240 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,241 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 81 flow. Second operand 4 states and 399 transitions. [2023-08-29 21:41:52,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 137 flow [2023-08-29 21:41:52,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:52,242 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 48 flow [2023-08-29 21:41:52,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-29 21:41:52,243 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -10 predicate places. [2023-08-29 21:41:52,243 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 48 flow [2023-08-29 21:41:52,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:52,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:41:52,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 21:41:52,449 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 [2023-08-29 21:41:52,450 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:41:52,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 69701203, now seen corresponding path program 1 times [2023-08-29 21:41:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886801336] [2023-08-29 21:41:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:52,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:52,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886801336] [2023-08-29 21:41:52,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886801336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:52,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:52,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:41:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952910540] [2023-08-29 21:41:52,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:52,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:41:52,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 212 [2023-08-29 21:41:52,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:52,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 212 [2023-08-29 21:41:52,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:52,725 INFO L130 PetriNetUnfolder]: 14/54 cut-off events. [2023-08-29 21:41:52,728 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:41:52,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 54 events. 14/54 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 14 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 105. Up to 40 conditions per place. [2023-08-29 21:41:52,729 INFO L137 encePairwiseOnDemand]: 209/212 looper letters, 10 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-29 21:41:52,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 17 transitions, 66 flow [2023-08-29 21:41:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-29 21:41:52,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2023-08-29 21:41:52,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-29 21:41:52,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-29 21:41:52,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:52,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-29 21:41:52,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,735 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 48 flow. Second operand 3 states and 292 transitions. [2023-08-29 21:41:52,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 17 transitions, 66 flow [2023-08-29 21:41:52,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 63 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:41:52,737 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2023-08-29 21:41:52,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-29 21:41:52,738 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -15 predicate places. [2023-08-29 21:41:52,739 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2023-08-29 21:41:52,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:52,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:41:52,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 21:41:52,740 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-29 21:41:52,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2134230616, now seen corresponding path program 1 times [2023-08-29 21:41:52,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:52,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516868164] [2023-08-29 21:41:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:52,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:52,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516868164] [2023-08-29 21:41:52,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516868164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:52,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:52,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:41:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988141221] [2023-08-29 21:41:52,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:52,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:41:52,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:41:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:41:52,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 212 [2023-08-29 21:41:52,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:52,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 212 [2023-08-29 21:41:52,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:52,946 INFO L130 PetriNetUnfolder]: 14/44 cut-off events. [2023-08-29 21:41:52,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:52,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 44 events. 14/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 14 based on Foata normal form. 3/46 useless extension candidates. Maximal degree in co-relation 95. Up to 40 conditions per place. [2023-08-29 21:41:52,947 INFO L137 encePairwiseOnDemand]: 207/212 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-29 21:41:52,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 13 transitions, 57 flow [2023-08-29 21:41:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-08-29 21:41:52,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42924528301886794 [2023-08-29 21:41:52,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-08-29 21:41:52,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-08-29 21:41:52,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:52,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-08-29 21:41:52,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,960 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 3 states and 273 transitions. [2023-08-29 21:41:52,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 13 transitions, 57 flow [2023-08-29 21:41:52,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:41:52,960 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-29 21:41:52,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-29 21:41:52,963 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -18 predicate places. [2023-08-29 21:41:52,963 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-29 21:41:52,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:52,966 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2023-08-29 21:41:52,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-29 21:41:52,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-29 21:41:52,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-29 21:41:52,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-29 21:41:52,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-29 21:41:52,971 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-29 21:41:52,972 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-29 21:41:52,972 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-29 21:41:52,972 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2023-08-29 21:41:52,972 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2023-08-29 21:41:52,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (10 of 22 remaining) [2023-08-29 21:41:52,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-29 21:41:52,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2023-08-29 21:41:52,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-08-29 21:41:52,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-29 21:41:52,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-29 21:41:52,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-29 21:41:52,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-29 21:41:52,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2023-08-29 21:41:52,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-29 21:41:52,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-29 21:41:52,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 21:41:52,975 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:41:52,977 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:41:52,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:53,007 INFO L130 PetriNetUnfolder]: 14/148 cut-off events. [2023-08-29 21:41:53,007 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:53,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 14/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 412 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-29 21:41:53,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:53,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:53,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:53,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:53,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:53,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 113 transitions, 231 flow [2023-08-29 21:41:53,027 INFO L130 PetriNetUnfolder]: 14/148 cut-off events. [2023-08-29 21:41:53,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:53,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 148 events. 14/148 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 412 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-08-29 21:41:53,029 INFO L119 LiptonReduction]: Number of co-enabled transitions 3280 [2023-08-29 21:41:55,765 INFO L134 LiptonReduction]: Checked pairs total: 7315 [2023-08-29 21:41:55,765 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-29 21:41:55,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:41:55,767 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:55,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:41:55,771 INFO L130 PetriNetUnfolder]: 2/33 cut-off events. [2023-08-29 21:41:55,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:55,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:55,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-29 21:41:55,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:41:55,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1293896400, now seen corresponding path program 1 times [2023-08-29 21:41:55,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707324751] [2023-08-29 21:41:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:55,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:55,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:41:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:41:55,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:41:55,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:41:55,804 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:41:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 21:41:55,805 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:41:55,805 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:41:55,806 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:41:55,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-29 21:41:55,823 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:41:55,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 154 transitions, 320 flow [2023-08-29 21:41:55,844 INFO L130 PetriNetUnfolder]: 24/229 cut-off events. [2023-08-29 21:41:55,844 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:41:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 229 events. 24/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 759 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2023-08-29 21:41:55,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 154 transitions, 320 flow [2023-08-29 21:41:55,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 154 transitions, 320 flow [2023-08-29 21:41:55,848 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:41:55,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 154 transitions, 320 flow [2023-08-29 21:41:55,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 154 transitions, 320 flow [2023-08-29 21:41:55,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 154 transitions, 320 flow [2023-08-29 21:41:55,877 INFO L130 PetriNetUnfolder]: 24/229 cut-off events. [2023-08-29 21:41:55,877 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:41:55,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 229 events. 24/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 759 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2023-08-29 21:41:55,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 9840 [2023-08-29 21:41:58,939 INFO L134 LiptonReduction]: Checked pairs total: 25965 [2023-08-29 21:41:58,939 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-29 21:41:58,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:41:58,941 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:41:58,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-08-29 21:41:58,943 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:41:58,943 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:41:58,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:58,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:58,943 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:41:58,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:58,944 INFO L85 PathProgramCache]: Analyzing trace with hash 27650, now seen corresponding path program 1 times [2023-08-29 21:41:58,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:58,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844181550] [2023-08-29 21:41:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:58,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:58,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:58,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844181550] [2023-08-29 21:41:58,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844181550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:58,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:58,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:58,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28476940] [2023-08-29 21:41:58,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:58,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:58,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:59,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 286 [2023-08-29 21:41:59,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:59,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 286 [2023-08-29 21:41:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:41:59,724 INFO L130 PetriNetUnfolder]: 4706/7894 cut-off events. [2023-08-29 21:41:59,725 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-29 21:41:59,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15400 conditions, 7894 events. 4706/7894 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 56571 event pairs, 3575 based on Foata normal form. 377/5799 useless extension candidates. Maximal degree in co-relation 10248. Up to 5684 conditions per place. [2023-08-29 21:41:59,774 INFO L137 encePairwiseOnDemand]: 265/286 looper letters, 65 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-29 21:41:59,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 302 flow [2023-08-29 21:41:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:41:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:41:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-29 21:41:59,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5699300699300699 [2023-08-29 21:41:59,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-29 21:41:59,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-29 21:41:59,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:41:59,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-29 21:41:59,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,783 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 154 flow. Second operand 3 states and 489 transitions. [2023-08-29 21:41:59,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 302 flow [2023-08-29 21:41:59,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 300 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 21:41:59,787 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 118 flow [2023-08-29 21:41:59,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-08-29 21:41:59,789 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2023-08-29 21:41:59,789 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 118 flow [2023-08-29 21:41:59,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:41:59,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:41:59,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 21:41:59,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:41:59,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:41:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash 27649, now seen corresponding path program 1 times [2023-08-29 21:41:59,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:41:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457929747] [2023-08-29 21:41:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:41:59,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:41:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:41:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:41:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:41:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457929747] [2023-08-29 21:41:59,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457929747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:41:59,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:41:59,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:41:59,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769631014] [2023-08-29 21:41:59,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:41:59,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:41:59,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:41:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:41:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:41:59,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 286 [2023-08-29 21:41:59,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:41:59,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:41:59,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 286 [2023-08-29 21:41:59,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:00,571 INFO L130 PetriNetUnfolder]: 4706/8059 cut-off events. [2023-08-29 21:42:00,571 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2023-08-29 21:42:00,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15771 conditions, 8059 events. 4706/8059 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 57302 event pairs, 2184 based on Foata normal form. 0/5541 useless extension candidates. Maximal degree in co-relation 11989. Up to 7423 conditions per place. [2023-08-29 21:42:00,622 INFO L137 encePairwiseOnDemand]: 282/286 looper letters, 54 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-29 21:42:00,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 260 flow [2023-08-29 21:42:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-29 21:42:00,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2023-08-29 21:42:00,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-29 21:42:00,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-29 21:42:00,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:00,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-29 21:42:00,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,630 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 118 flow. Second operand 3 states and 448 transitions. [2023-08-29 21:42:00,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 260 flow [2023-08-29 21:42:00,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 67 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:00,641 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 128 flow [2023-08-29 21:42:00,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-29 21:42:00,642 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2023-08-29 21:42:00,642 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 128 flow [2023-08-29 21:42:00,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:00,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 21:42:00,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:00,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -214578512, now seen corresponding path program 1 times [2023-08-29 21:42:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691628017] [2023-08-29 21:42:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:00,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:00,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691628017] [2023-08-29 21:42:00,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691628017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:00,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:00,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774421745] [2023-08-29 21:42:00,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:00,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:00,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 286 [2023-08-29 21:42:00,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 128 flow. Second operand has 4 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) [2023-08-29 21:42:00,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:00,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 286 [2023-08-29 21:42:00,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:01,346 INFO L130 PetriNetUnfolder]: 3432/5829 cut-off events. [2023-08-29 21:42:01,346 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2023-08-29 21:42:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11820 conditions, 5829 events. 3432/5829 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 39352 event pairs, 2882 based on Foata normal form. 325/4623 useless extension candidates. Maximal degree in co-relation 11730. Up to 4600 conditions per place. [2023-08-29 21:42:01,370 INFO L137 encePairwiseOnDemand]: 279/286 looper letters, 57 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-29 21:42:01,370 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 284 flow [2023-08-29 21:42:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-29 21:42:01,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2023-08-29 21:42:01,372 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-29 21:42:01,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-29 21:42:01,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:01,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-29 21:42:01,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:01,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:01,376 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 286.0) internal successors, (1430), 5 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:01,376 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 128 flow. Second operand 4 states and 559 transitions. [2023-08-29 21:42:01,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 284 flow [2023-08-29 21:42:01,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:01,379 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 124 flow [2023-08-29 21:42:01,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=4, PETRI_FLOW=124, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-29 21:42:01,381 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-08-29 21:42:01,383 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 124 flow [2023-08-29 21:42:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-08-29 21:42:01,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:01,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:01,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 21:42:01,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:01,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:01,384 INFO L85 PathProgramCache]: Analyzing trace with hash -214803336, now seen corresponding path program 1 times [2023-08-29 21:42:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399311480] [2023-08-29 21:42:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:01,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:01,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:01,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399311480] [2023-08-29 21:42:01,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399311480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:01,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559891301] [2023-08-29 21:42:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:01,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:01,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:42:01,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 21:42:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:01,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:01,558 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 [2023-08-29 21:42:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:01,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:01,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559891301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:01,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:01,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-29 21:42:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460319995] [2023-08-29 21:42:01,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:01,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 21:42:01,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 21:42:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-29 21:42:01,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 286 [2023-08-29 21:42:01,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 124 flow. Second operand has 8 states, 8 states have (on average 127.875) internal successors, (1023), 8 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:01,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:01,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 286 [2023-08-29 21:42:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:02,117 INFO L130 PetriNetUnfolder]: 682/1361 cut-off events. [2023-08-29 21:42:02,117 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2023-08-29 21:42:02,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 1361 events. 682/1361 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8161 event pairs, 0 based on Foata normal form. 156/1318 useless extension candidates. Maximal degree in co-relation 2849. Up to 816 conditions per place. [2023-08-29 21:42:02,124 INFO L137 encePairwiseOnDemand]: 282/286 looper letters, 60 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-29 21:42:02,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 290 flow [2023-08-29 21:42:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 21:42:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 21:42:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-29 21:42:02,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4874125874125874 [2023-08-29 21:42:02,127 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-29 21:42:02,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-29 21:42:02,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:02,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-29 21:42:02,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,132 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 286.0) internal successors, (1716), 6 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,132 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 124 flow. Second operand 5 states and 697 transitions. [2023-08-29 21:42:02,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 290 flow [2023-08-29 21:42:02,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:02,135 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 99 flow [2023-08-29 21:42:02,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-29 21:42:02,136 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -13 predicate places. [2023-08-29 21:42:02,136 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 99 flow [2023-08-29 21:42:02,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 127.875) internal successors, (1023), 8 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:02,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:02,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-29 21:42:02,347 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,SelfDestructingSolverStorable9 [2023-08-29 21:42:02,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-08-29 21:42:02,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1937996620, now seen corresponding path program 1 times [2023-08-29 21:42:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227347456] [2023-08-29 21:42:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:02,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:02,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227347456] [2023-08-29 21:42:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227347456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:02,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:02,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:02,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338371838] [2023-08-29 21:42:02,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:02,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:02,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:02,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 286 [2023-08-29 21:42:02,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:02,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 286 [2023-08-29 21:42:02,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:02,571 INFO L130 PetriNetUnfolder]: 468/846 cut-off events. [2023-08-29 21:42:02,571 INFO L131 PetriNetUnfolder]: For 358/358 co-relation queries the response was YES. [2023-08-29 21:42:02,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 846 events. 468/846 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3890 event pairs, 468 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 1899. Up to 800 conditions per place. [2023-08-29 21:42:02,573 INFO L137 encePairwiseOnDemand]: 277/286 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-29 21:42:02,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 30 transitions, 131 flow [2023-08-29 21:42:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:02,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-29 21:42:02,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42773892773892774 [2023-08-29 21:42:02,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-29 21:42:02,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-29 21:42:02,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:02,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-29 21:42:02,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,579 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 99 flow. Second operand 3 states and 367 transitions. [2023-08-29 21:42:02,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 30 transitions, 131 flow [2023-08-29 21:42:02,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 124 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 21:42:02,581 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-29 21:42:02,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-29 21:42:02,582 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -22 predicate places. [2023-08-29 21:42:02,582 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-29 21:42:02,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:02,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (29 of 30 remaining) [2023-08-29 21:42:02,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 30 remaining) [2023-08-29 21:42:02,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 30 remaining) [2023-08-29 21:42:02,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2023-08-29 21:42:02,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2023-08-29 21:42:02,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2023-08-29 21:42:02,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2023-08-29 21:42:02,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2023-08-29 21:42:02,586 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2023-08-29 21:42:02,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 21:42:02,587 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-29 21:42:02,588 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:02,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 154 transitions, 320 flow [2023-08-29 21:42:02,609 INFO L130 PetriNetUnfolder]: 24/229 cut-off events. [2023-08-29 21:42:02,609 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:02,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 229 events. 24/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 759 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2023-08-29 21:42:02,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 154 transitions, 320 flow [2023-08-29 21:42:02,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 154 transitions, 320 flow [2023-08-29 21:42:02,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:02,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 154 transitions, 320 flow [2023-08-29 21:42:02,612 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 154 transitions, 320 flow [2023-08-29 21:42:02,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 154 transitions, 320 flow [2023-08-29 21:42:02,631 INFO L130 PetriNetUnfolder]: 24/229 cut-off events. [2023-08-29 21:42:02,632 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:02,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 229 events. 24/229 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 759 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2023-08-29 21:42:02,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 9840 [2023-08-29 21:42:05,557 INFO L134 LiptonReduction]: Checked pairs total: 25669 [2023-08-29 21:42:05,558 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-29 21:42:05,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:05,559 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:05,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:05,566 INFO L130 PetriNetUnfolder]: 10/77 cut-off events. [2023-08-29 21:42:05,566 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 21:42:05,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:05,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-29 21:42:05,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:05,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1710844812, now seen corresponding path program 1 times [2023-08-29 21:42:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:05,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498532635] [2023-08-29 21:42:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:05,581 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:05,593 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:05,593 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:05,593 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 21:42:05,594 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:05,594 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:05,594 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:05,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-29 21:42:05,612 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:42:05,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:05,642 INFO L130 PetriNetUnfolder]: 34/310 cut-off events. [2023-08-29 21:42:05,642 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:05,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 310 events. 34/310 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1098 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 233. Up to 8 conditions per place. [2023-08-29 21:42:05,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:05,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:05,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:05,647 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:05,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:05,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:05,674 INFO L130 PetriNetUnfolder]: 34/310 cut-off events. [2023-08-29 21:42:05,675 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 310 events. 34/310 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1098 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 233. Up to 8 conditions per place. [2023-08-29 21:42:05,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 19680 [2023-08-29 21:42:08,744 INFO L134 LiptonReduction]: Checked pairs total: 54553 [2023-08-29 21:42:08,744 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-29 21:42:08,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:42:08,746 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:08,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-29 21:42:08,747 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 21:42:08,748 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:42:08,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:08,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:08,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:08,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 44682, now seen corresponding path program 1 times [2023-08-29 21:42:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:08,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273793644] [2023-08-29 21:42:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:08,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:08,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:08,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273793644] [2023-08-29 21:42:08,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273793644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:08,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173916770] [2023-08-29 21:42:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:08,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:08,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-29 21:42:08,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 215 flow. Second operand has 3 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) [2023-08-29 21:42:08,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:08,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-29 21:42:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:18,304 INFO L130 PetriNetUnfolder]: 109551/157552 cut-off events. [2023-08-29 21:42:18,304 INFO L131 PetriNetUnfolder]: For 1277/1277 co-relation queries the response was YES. [2023-08-29 21:42:18,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309379 conditions, 157552 events. 109551/157552 cut-off events. For 1277/1277 co-relation queries the response was YES. Maximal size of possible extension queue 5080. Compared 1258434 event pairs, 103634 based on Foata normal form. 8638/115084 useless extension candidates. Maximal degree in co-relation 127655. Up to 150894 conditions per place. [2023-08-29 21:42:19,355 INFO L137 encePairwiseOnDemand]: 329/359 looper letters, 70 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-29 21:42:19,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 339 flow [2023-08-29 21:42:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-08-29 21:42:19,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571030640668524 [2023-08-29 21:42:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-08-29 21:42:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-08-29 21:42:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-08-29 21:42:19,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,363 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 215 flow. Second operand 3 states and 600 transitions. [2023-08-29 21:42:19,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 339 flow [2023-08-29 21:42:19,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 333 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 21:42:19,366 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 171 flow [2023-08-29 21:42:19,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-08-29 21:42:19,367 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2023-08-29 21:42:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 171 flow [2023-08-29 21:42:19,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-29 21:42:19,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:19,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:42:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 21:42:19,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:19,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 44684, now seen corresponding path program 1 times [2023-08-29 21:42:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:19,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682499229] [2023-08-29 21:42:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682499229] [2023-08-29 21:42:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682499229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:19,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:19,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:42:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252146041] [2023-08-29 21:42:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:42:19,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:42:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:42:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 359 [2023-08-29 21:42:19,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:19,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:19,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 359 [2023-08-29 21:42:19,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:27,954 INFO L130 PetriNetUnfolder]: 101530/144850 cut-off events. [2023-08-29 21:42:27,955 INFO L131 PetriNetUnfolder]: For 6472/6472 co-relation queries the response was YES. [2023-08-29 21:42:28,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294348 conditions, 144850 events. 101530/144850 cut-off events. For 6472/6472 co-relation queries the response was YES. Maximal size of possible extension queue 4675. Compared 1149468 event pairs, 77467 based on Foata normal form. 0/102495 useless extension candidates. Maximal degree in co-relation 294245. Up to 107009 conditions per place. [2023-08-29 21:42:28,774 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 93 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-29 21:42:28,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 437 flow [2023-08-29 21:42:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 21:42:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 21:42:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-29 21:42:28,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542246982358403 [2023-08-29 21:42:28,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-29 21:42:28,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-29 21:42:28,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:28,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-29 21:42:28,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,781 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 171 flow. Second operand 3 states and 584 transitions. [2023-08-29 21:42:28,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 437 flow [2023-08-29 21:42:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 110 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 21:42:28,786 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 171 flow [2023-08-29 21:42:28,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2023-08-29 21:42:28,787 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2023-08-29 21:42:28,787 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 171 flow [2023-08-29 21:42:28,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:28,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:28,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:28,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 21:42:28,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:28,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1647137909, now seen corresponding path program 1 times [2023-08-29 21:42:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:28,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8766130] [2023-08-29 21:42:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:28,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8766130] [2023-08-29 21:42:28,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8766130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887157169] [2023-08-29 21:42:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:28,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:28,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:42:28,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 21:42:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 21:42:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:28,935 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 [2023-08-29 21:42:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:28,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:28,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887157169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:28,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:28,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-29 21:42:28,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725738500] [2023-08-29 21:42:28,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:28,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 21:42:28,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 21:42:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-29 21:42:29,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2023-08-29 21:42:29,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:29,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:29,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2023-08-29 21:42:29,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:36,721 INFO L130 PetriNetUnfolder]: 93392/135434 cut-off events. [2023-08-29 21:42:36,722 INFO L131 PetriNetUnfolder]: For 3193/3193 co-relation queries the response was YES. [2023-08-29 21:42:36,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276369 conditions, 135434 events. 93392/135434 cut-off events. For 3193/3193 co-relation queries the response was YES. Maximal size of possible extension queue 4533. Compared 1122296 event pairs, 165 based on Foata normal form. 14/99364 useless extension candidates. Maximal degree in co-relation 207730. Up to 93492 conditions per place. [2023-08-29 21:42:37,435 INFO L137 encePairwiseOnDemand]: 353/359 looper letters, 177 selfloop transitions, 8 changer transitions 0/200 dead transitions. [2023-08-29 21:42:37,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 200 transitions, 803 flow [2023-08-29 21:42:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1155 transitions. [2023-08-29 21:42:37,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362116991643454 [2023-08-29 21:42:37,440 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1155 transitions. [2023-08-29 21:42:37,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1155 transitions. [2023-08-29 21:42:37,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:37,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1155 transitions. [2023-08-29 21:42:37,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.5) internal successors, (1155), 6 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:37,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:37,447 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:37,448 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 171 flow. Second operand 6 states and 1155 transitions. [2023-08-29 21:42:37,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 200 transitions, 803 flow [2023-08-29 21:42:38,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 200 transitions, 797 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:38,968 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 191 flow [2023-08-29 21:42:38,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-29 21:42:38,968 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2023-08-29 21:42:38,969 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 191 flow [2023-08-29 21:42:38,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:38,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:38,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:38,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 21:42:39,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:39,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:39,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1646854014, now seen corresponding path program 1 times [2023-08-29 21:42:39,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:39,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067080275] [2023-08-29 21:42:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:39,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:39,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067080275] [2023-08-29 21:42:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067080275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:39,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990722992] [2023-08-29 21:42:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:39,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:39,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 359 [2023-08-29 21:42:39,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:39,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:39,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 359 [2023-08-29 21:42:39,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:44,010 INFO L130 PetriNetUnfolder]: 58498/84048 cut-off events. [2023-08-29 21:42:44,010 INFO L131 PetriNetUnfolder]: For 13004/13004 co-relation queries the response was YES. [2023-08-29 21:42:44,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176958 conditions, 84048 events. 58498/84048 cut-off events. For 13004/13004 co-relation queries the response was YES. Maximal size of possible extension queue 2670. Compared 629326 event pairs, 48466 based on Foata normal form. 5475/68522 useless extension candidates. Maximal degree in co-relation 131513. Up to 67224 conditions per place. [2023-08-29 21:42:44,423 INFO L137 encePairwiseOnDemand]: 350/359 looper letters, 80 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2023-08-29 21:42:44,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 100 transitions, 415 flow [2023-08-29 21:42:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:44,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 705 transitions. [2023-08-29 21:42:44,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909470752089137 [2023-08-29 21:42:44,425 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 705 transitions. [2023-08-29 21:42:44,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 705 transitions. [2023-08-29 21:42:44,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:44,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 705 transitions. [2023-08-29 21:42:44,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,430 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,430 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 191 flow. Second operand 4 states and 705 transitions. [2023-08-29 21:42:44,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 100 transitions, 415 flow [2023-08-29 21:42:44,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 406 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:44,437 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 180 flow [2023-08-29 21:42:44,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2023-08-29 21:42:44,438 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2023-08-29 21:42:44,438 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 180 flow [2023-08-29 21:42:44,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:44,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 21:42:44,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 21:42:44,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:44,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:44,439 INFO L85 PathProgramCache]: Analyzing trace with hash 487129997, now seen corresponding path program 1 times [2023-08-29 21:42:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:44,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944762124] [2023-08-29 21:42:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:44,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944762124] [2023-08-29 21:42:44,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944762124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:42:44,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:42:44,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 21:42:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222935713] [2023-08-29 21:42:44,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:42:44,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 21:42:44,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 21:42:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 21:42:44,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 359 [2023-08-29 21:42:44,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:44,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:44,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 359 [2023-08-29 21:42:44,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:49,583 INFO L130 PetriNetUnfolder]: 60014/88624 cut-off events. [2023-08-29 21:42:49,583 INFO L131 PetriNetUnfolder]: For 21121/21121 co-relation queries the response was YES. [2023-08-29 21:42:49,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191070 conditions, 88624 events. 60014/88624 cut-off events. For 21121/21121 co-relation queries the response was YES. Maximal size of possible extension queue 2521. Compared 661145 event pairs, 30500 based on Foata normal form. 0/73267 useless extension candidates. Maximal degree in co-relation 150892. Up to 34880 conditions per place. [2023-08-29 21:42:50,004 INFO L137 encePairwiseOnDemand]: 333/359 looper letters, 102 selfloop transitions, 14 changer transitions 1/125 dead transitions. [2023-08-29 21:42:50,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 540 flow [2023-08-29 21:42:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 21:42:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 21:42:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-29 21:42:50,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777158774373259 [2023-08-29 21:42:50,006 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-29 21:42:50,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-29 21:42:50,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:50,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-29 21:42:50,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:50,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:50,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:50,011 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 180 flow. Second operand 4 states and 686 transitions. [2023-08-29 21:42:50,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 540 flow [2023-08-29 21:42:53,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 21:42:53,180 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 322 flow [2023-08-29 21:42:53,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=322, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-08-29 21:42:53,181 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2023-08-29 21:42:53,181 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 322 flow [2023-08-29 21:42:53,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:53,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:53,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-29 21:42:53,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 21:42:53,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-29 21:42:53,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash 891935583, now seen corresponding path program 1 times [2023-08-29 21:42:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:53,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459017521] [2023-08-29 21:42:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:53,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:53,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:42:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459017521] [2023-08-29 21:42:53,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459017521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 21:42:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800511679] [2023-08-29 21:42:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:53,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 21:42:53,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 21:42:53,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 21:42:53,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 21:42:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:42:53,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-29 21:42:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 21:42:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:53,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 21:42:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:42:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800511679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 21:42:53,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 21:42:53,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-29 21:42:53,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146940428] [2023-08-29 21:42:53,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 21:42:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-29 21:42:53,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:42:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-29 21:42:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-29 21:42:53,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 359 [2023-08-29 21:42:53,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 322 flow. Second operand has 9 states, 9 states have (on average 166.33333333333334) internal successors, (1497), 9 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:53,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:42:53,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 359 [2023-08-29 21:42:53,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 21:42:54,164 INFO L130 PetriNetUnfolder]: 7285/10894 cut-off events. [2023-08-29 21:42:54,164 INFO L131 PetriNetUnfolder]: For 6127/6397 co-relation queries the response was YES. [2023-08-29 21:42:54,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27350 conditions, 10894 events. 7285/10894 cut-off events. For 6127/6397 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 65146 event pairs, 224 based on Foata normal form. 1079/11808 useless extension candidates. Maximal degree in co-relation 27340. Up to 7161 conditions per place. [2023-08-29 21:42:54,189 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2023-08-29 21:42:54,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 456 flow [2023-08-29 21:42:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 21:42:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 21:42:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1072 transitions. [2023-08-29 21:42:54,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976787372330548 [2023-08-29 21:42:54,192 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1072 transitions. [2023-08-29 21:42:54,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1072 transitions. [2023-08-29 21:42:54,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 21:42:54,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1072 transitions. [2023-08-29 21:42:54,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.66666666666666) internal successors, (1072), 6 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,197 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,198 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 322 flow. Second operand 6 states and 1072 transitions. [2023-08-29 21:42:54,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 456 flow [2023-08-29 21:42:54,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 448 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-29 21:42:54,215 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-29 21:42:54,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-29 21:42:54,216 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -25 predicate places. [2023-08-29 21:42:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-29 21:42:54,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 166.33333333333334) internal successors, (1497), 9 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:42:54,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (37 of 38 remaining) [2023-08-29 21:42:54,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-29 21:42:54,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-29 21:42:54,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-29 21:42:54,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-29 21:42:54,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-29 21:42:54,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-29 21:42:54,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-29 21:42:54,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-29 21:42:54,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-29 21:42:54,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-29 21:42:54,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-29 21:42:54,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 38 remaining) [2023-08-29 21:42:54,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-29 21:42:54,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-29 21:42:54,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-29 21:42:54,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 38 remaining) [2023-08-29 21:42:54,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-29 21:42:54,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-29 21:42:54,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 38 remaining) [2023-08-29 21:42:54,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 21:42:54,429 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 [2023-08-29 21:42:54,430 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-29 21:42:54,430 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-29 21:42:54,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:54,456 INFO L130 PetriNetUnfolder]: 34/310 cut-off events. [2023-08-29 21:42:54,456 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:54,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 310 events. 34/310 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1098 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 233. Up to 8 conditions per place. [2023-08-29 21:42:54,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:54,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:54,460 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:54,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:54,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:54,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 195 transitions, 411 flow [2023-08-29 21:42:54,483 INFO L130 PetriNetUnfolder]: 34/310 cut-off events. [2023-08-29 21:42:54,484 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 310 events. 34/310 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1098 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 233. Up to 8 conditions per place. [2023-08-29 21:42:54,493 INFO L119 LiptonReduction]: Number of co-enabled transitions 19680 [2023-08-29 21:42:57,670 INFO L134 LiptonReduction]: Checked pairs total: 61620 [2023-08-29 21:42:57,670 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-29 21:42:57,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-29 21:42:57,671 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:42:57,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-29 21:42:57,680 INFO L130 PetriNetUnfolder]: 18/120 cut-off events. [2023-08-29 21:42:57,680 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-29 21:42:57,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:42:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-29 21:42:57,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-29 21:42:57,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:42:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1736527918, now seen corresponding path program 1 times [2023-08-29 21:42:57,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:42:57,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395354975] [2023-08-29 21:42:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:42:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:42:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:57,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-29 21:42:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-29 21:42:57,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-29 21:42:57,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-29 21:42:57,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-29 21:42:57,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 21:42:57,705 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-29 21:42:57,706 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-29 21:42:57,706 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-29 21:42:57,706 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-29 21:42:57,731 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 21:42:57,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 236 transitions, 504 flow [2023-08-29 21:42:57,773 INFO L130 PetriNetUnfolder]: 44/391 cut-off events. [2023-08-29 21:42:57,773 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 21:42:57,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 391 events. 44/391 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1442 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 318. Up to 10 conditions per place. [2023-08-29 21:42:57,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 236 transitions, 504 flow [2023-08-29 21:42:57,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 236 transitions, 504 flow [2023-08-29 21:42:57,781 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 21:42:57,781 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 236 transitions, 504 flow [2023-08-29 21:42:57,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 236 transitions, 504 flow [2023-08-29 21:42:57,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 236 transitions, 504 flow [2023-08-29 21:42:57,816 INFO L130 PetriNetUnfolder]: 44/391 cut-off events. [2023-08-29 21:42:57,817 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-29 21:42:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 391 events. 44/391 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1442 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 318. Up to 10 conditions per place. [2023-08-29 21:42:57,830 INFO L119 LiptonReduction]: Number of co-enabled transitions 32800 [2023-08-29 21:43:01,239 INFO L134 LiptonReduction]: Checked pairs total: 94131 [2023-08-29 21:43:01,239 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-08-29 21:43:01,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 21:43:01,241 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;@5ebc52bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 21:43:01,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2023-08-29 21:43:01,242 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2023-08-29 21:43:01,242 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 21:43:01,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 21:43:01,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 21:43:01,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2023-08-29 21:43:01,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 21:43:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 64981, now seen corresponding path program 1 times [2023-08-29 21:43:01,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 21:43:01,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110579148] [2023-08-29 21:43:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 21:43:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 21:43:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 21:43:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 21:43:01,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 21:43:01,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110579148] [2023-08-29 21:43:01,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110579148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 21:43:01,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 21:43:01,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 21:43:01,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527771799] [2023-08-29 21:43:01,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 21:43:01,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 21:43:01,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 21:43:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 21:43:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 21:43:01,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 429 [2023-08-29 21:43:01,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 21:43:01,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 21:43:01,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 429 [2023-08-29 21:43:01,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand