./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/03_incdec.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-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 ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 11:28:42,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 11:28:42,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 11:28:42,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 11:28:42,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 11:28:42,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 11:28:42,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 11:28:42,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 11:28:42,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 11:28:42,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 11:28:42,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 11:28:42,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 11:28:42,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 11:28:42,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 11:28:42,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 11:28:42,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 11:28:42,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 11:28:42,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 11:28:42,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 11:28:42,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 11:28:42,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 11:28:42,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 11:28:42,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 11:28:42,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 11:28:42,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 11:28:42,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 11:28:42,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 11:28:42,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 11:28:42,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 11:28:42,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 11:28:42,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 11:28:42,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 11:28:42,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 11:28:42,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 11:28:42,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 11:28:42,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 11:28:42,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 11:28:42,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 11:28:42,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 11:28:42,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 11:28:42,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 11:28:42,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 11:28:42,433 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 11:28:42,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 11:28:42,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 11:28:42,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 11:28:42,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 11:28:42,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 11:28:42,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 11:28:42,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 11:28:42,436 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 11:28:42,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 11:28:42,437 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 11:28:42,437 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 11:28:42,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 11:28:42,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 11:28:42,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 11:28:42,438 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 11:28:42,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 11:28:42,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 11:28:42,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 11:28:42,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 11:28:42,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:28:42,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 11:28:42,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 11:28:42,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 11:28:42,441 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 11:28:42,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 11:28:42,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 11:28:42,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 11:28:42,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 11:28:42,698 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 11:28:42,698 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 11:28:42,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-31 11:28:43,635 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 11:28:43,834 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 11:28:43,834 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i [2023-08-31 11:28:43,841 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1879617e0/b68b72ac50294ac0a50b1ccd785e75b1/FLAG4054e4f94 [2023-08-31 11:28:43,851 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1879617e0/b68b72ac50294ac0a50b1ccd785e75b1 [2023-08-31 11:28:43,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 11:28:43,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 11:28:43,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 11:28:43,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 11:28:43,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 11:28:43,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:28:43" (1/1) ... [2023-08-31 11:28:43,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368bbf41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:43, skipping insertion in model container [2023-08-31 11:28:43,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:28:43" (1/1) ... [2023-08-31 11:28:43,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 11:28:43,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 11:28:44,135 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30534,30547] [2023-08-31 11:28:44,140 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30928,30941] [2023-08-31 11:28:44,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:28:44,152 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 11:28:44,182 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30534,30547] [2023-08-31 11:28:44,186 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/03_incdec.i[30928,30941] [2023-08-31 11:28:44,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:28:44,219 INFO L208 MainTranslator]: Completed translation [2023-08-31 11:28:44,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44 WrapperNode [2023-08-31 11:28:44,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 11:28:44,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 11:28:44,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 11:28:44,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 11:28:44,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,256 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 236 [2023-08-31 11:28:44,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 11:28:44,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 11:28:44,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 11:28:44,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 11:28:44,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,278 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 11:28:44,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 11:28:44,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 11:28:44,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 11:28:44,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (1/1) ... [2023-08-31 11:28:44,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:28:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 11:28:44,305 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) [2023-08-31 11:28:44,328 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 [2023-08-31 11:28:44,339 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 11:28:44,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 11:28:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 11:28:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 11:28:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 11:28:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 11:28:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 11:28:44,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 11:28:44,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 11:28:44,341 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 11:28:44,464 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 11:28:44,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 11:28:44,716 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 11:28:44,863 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 11:28:44,864 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-31 11:28:44,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:28:44 BoogieIcfgContainer [2023-08-31 11:28:44,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 11:28:44,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 11:28:44,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 11:28:44,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 11:28:44,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:28:43" (1/3) ... [2023-08-31 11:28:44,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653d64ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:28:44, skipping insertion in model container [2023-08-31 11:28:44,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:28:44" (2/3) ... [2023-08-31 11:28:44,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653d64ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:28:44, skipping insertion in model container [2023-08-31 11:28:44,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:28:44" (3/3) ... [2023-08-31 11:28:44,872 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-08-31 11:28:44,877 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 11:28:44,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 11:28:44,884 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-31 11:28:44,884 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 11:28:44,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:28:44,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 155 transitions, 315 flow [2023-08-31 11:28:45,014 INFO L130 PetriNetUnfolder]: 9/165 cut-off events. [2023-08-31 11:28:45,014 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:28:45,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 165 events. 9/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2023-08-31 11:28:45,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 155 transitions, 315 flow [2023-08-31 11:28:45,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 155 transitions, 315 flow [2023-08-31 11:28:45,028 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:28:45,036 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 155 transitions, 315 flow [2023-08-31 11:28:45,039 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 155 transitions, 315 flow [2023-08-31 11:28:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 155 transitions, 315 flow [2023-08-31 11:28:45,072 INFO L130 PetriNetUnfolder]: 9/165 cut-off events. [2023-08-31 11:28:45,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:28:45,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 165 events. 9/165 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 398 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 139. Up to 4 conditions per place. [2023-08-31 11:28:45,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 3302 [2023-08-31 11:28:50,485 INFO L134 LiptonReduction]: Checked pairs total: 3528 [2023-08-31 11:28:50,485 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-08-31 11:28:50,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:28:50,499 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:28:50,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:28:50,507 INFO L130 PetriNetUnfolder]: 0/40 cut-off events. [2023-08-31 11:28:50,507 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:28:50,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:28:50,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 11:28:50,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:28:50,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:28:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 740919031, now seen corresponding path program 1 times [2023-08-31 11:28:50,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:28:50,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942571033] [2023-08-31 11:28:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:28:50,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:28:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:28:50,600 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:28:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:28:50,646 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:28:50,647 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:28:50,648 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:28:50,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 11:28:50,650 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:28:50,653 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:28:50,654 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:28:50,654 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 11:28:50,692 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:28:50,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 283 transitions, 578 flow [2023-08-31 11:28:50,749 INFO L130 PetriNetUnfolder]: 17/305 cut-off events. [2023-08-31 11:28:50,749 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:28:50,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 305 events. 17/305 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1200 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 266. Up to 6 conditions per place. [2023-08-31 11:28:50,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 283 transitions, 578 flow [2023-08-31 11:28:50,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 283 transitions, 578 flow [2023-08-31 11:28:50,753 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:28:50,753 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 283 transitions, 578 flow [2023-08-31 11:28:50,753 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 283 transitions, 578 flow [2023-08-31 11:28:50,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 283 transitions, 578 flow [2023-08-31 11:28:50,781 INFO L130 PetriNetUnfolder]: 17/305 cut-off events. [2023-08-31 11:28:50,782 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:28:50,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 305 events. 17/305 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1200 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 266. Up to 6 conditions per place. [2023-08-31 11:28:50,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 39116 [2023-08-31 11:28:53,301 INFO L134 LiptonReduction]: Checked pairs total: 181083 [2023-08-31 11:28:53,302 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-31 11:28:53,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:28:53,304 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:28:53,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:28:53,308 INFO L130 PetriNetUnfolder]: 1/57 cut-off events. [2023-08-31 11:28:53,308 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:28:53,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:28:53,308 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 11:28:53,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:28:53,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:28:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash 808750042, now seen corresponding path program 1 times [2023-08-31 11:28:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:28:53,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176523938] [2023-08-31 11:28:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:28:53,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:28:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:28:53,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:28:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:28:53,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:28:53,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:28:53,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:28:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 11:28:53,333 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:28:53,333 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:28:53,334 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:28:53,334 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 11:28:53,358 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:28:53,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 411 transitions, 843 flow [2023-08-31 11:28:53,414 INFO L130 PetriNetUnfolder]: 25/445 cut-off events. [2023-08-31 11:28:53,414 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:28:53,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 445 events. 25/445 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2149 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 393. Up to 8 conditions per place. [2023-08-31 11:28:53,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 396 places, 411 transitions, 843 flow [2023-08-31 11:28:53,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 396 places, 411 transitions, 843 flow [2023-08-31 11:28:53,422 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:28:53,422 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 396 places, 411 transitions, 843 flow [2023-08-31 11:28:53,422 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 396 places, 411 transitions, 843 flow [2023-08-31 11:28:53,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 411 transitions, 843 flow [2023-08-31 11:28:53,467 INFO L130 PetriNetUnfolder]: 25/445 cut-off events. [2023-08-31 11:28:53,467 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:28:53,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 445 events. 25/445 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2149 event pairs, 0 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 393. Up to 8 conditions per place. [2023-08-31 11:28:53,490 INFO L119 LiptonReduction]: Number of co-enabled transitions 107442 [2023-08-31 11:28:56,951 INFO L134 LiptonReduction]: Checked pairs total: 519251 [2023-08-31 11:28:56,952 INFO L136 LiptonReduction]: Total number of compositions: 264 [2023-08-31 11:28:56,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:28:56,954 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:28:56,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:28:56,964 INFO L130 PetriNetUnfolder]: 2/102 cut-off events. [2023-08-31 11:28:56,964 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:28:56,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:28:56,964 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 11:28:56,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:28:56,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:28:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1992474264, now seen corresponding path program 1 times [2023-08-31 11:28:56,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:28:56,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430095388] [2023-08-31 11:28:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:28:56,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:28:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:28:56,996 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:28:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:28:57,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:28:57,025 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:28:57,025 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:28:57,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 11:28:57,026 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:28:57,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:28:57,026 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:28:57,026 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 11:28:57,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:28:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 519 places, 539 transitions, 1110 flow [2023-08-31 11:28:57,147 INFO L130 PetriNetUnfolder]: 33/585 cut-off events. [2023-08-31 11:28:57,147 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:28:57,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 585 events. 33/585 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3117 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 520. Up to 10 conditions per place. [2023-08-31 11:28:57,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 519 places, 539 transitions, 1110 flow [2023-08-31 11:28:57,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 519 places, 539 transitions, 1110 flow [2023-08-31 11:28:57,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:28:57,164 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 519 places, 539 transitions, 1110 flow [2023-08-31 11:28:57,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 519 places, 539 transitions, 1110 flow [2023-08-31 11:28:57,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 519 places, 539 transitions, 1110 flow [2023-08-31 11:28:57,248 INFO L130 PetriNetUnfolder]: 33/585 cut-off events. [2023-08-31 11:28:57,249 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:28:57,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 585 events. 33/585 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3117 event pairs, 0 based on Foata normal form. 0/419 useless extension candidates. Maximal degree in co-relation 520. Up to 10 conditions per place. [2023-08-31 11:28:57,290 INFO L119 LiptonReduction]: Number of co-enabled transitions 208280 [2023-08-31 11:29:01,762 INFO L134 LiptonReduction]: Checked pairs total: 883721 [2023-08-31 11:29:01,762 INFO L136 LiptonReduction]: Total number of compositions: 362 [2023-08-31 11:29:01,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:01,764 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:01,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:01,777 INFO L130 PetriNetUnfolder]: 3/165 cut-off events. [2023-08-31 11:29:01,777 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:29:01,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:01,778 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:01,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:01,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1271376183, now seen corresponding path program 1 times [2023-08-31 11:29:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:01,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236346818] [2023-08-31 11:29:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:01,825 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:01,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:01,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:01,844 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 11:29:01,844 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:01,845 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:01,845 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:01,845 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 11:29:01,877 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:01,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 642 places, 667 transitions, 1379 flow [2023-08-31 11:29:02,003 INFO L130 PetriNetUnfolder]: 41/725 cut-off events. [2023-08-31 11:29:02,003 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:29:02,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 725 events. 41/725 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4114 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 647. Up to 12 conditions per place. [2023-08-31 11:29:02,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 642 places, 667 transitions, 1379 flow [2023-08-31 11:29:02,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 642 places, 667 transitions, 1379 flow [2023-08-31 11:29:02,027 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:02,027 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 642 places, 667 transitions, 1379 flow [2023-08-31 11:29:02,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 642 places, 667 transitions, 1379 flow [2023-08-31 11:29:02,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 642 places, 667 transitions, 1379 flow [2023-08-31 11:29:02,167 INFO L130 PetriNetUnfolder]: 41/725 cut-off events. [2023-08-31 11:29:02,167 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:29:02,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 725 events. 41/725 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4114 event pairs, 0 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 647. Up to 12 conditions per place. [2023-08-31 11:29:02,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 341630 [2023-08-31 11:29:08,039 INFO L134 LiptonReduction]: Checked pairs total: 1434199 [2023-08-31 11:29:08,039 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-31 11:29:08,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:08,043 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:08,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:08,061 INFO L130 PetriNetUnfolder]: 6/246 cut-off events. [2023-08-31 11:29:08,062 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:29:08,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:08,062 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:08,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:08,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 313533929, now seen corresponding path program 1 times [2023-08-31 11:29:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:08,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525014931] [2023-08-31 11:29:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:08,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:08,095 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:08,106 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:08,106 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:08,106 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:08,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 11:29:08,106 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:08,107 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:08,107 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:08,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 11:29:08,139 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:08,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 765 places, 795 transitions, 1650 flow [2023-08-31 11:29:08,331 INFO L130 PetriNetUnfolder]: 49/865 cut-off events. [2023-08-31 11:29:08,331 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:29:08,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 865 events. 49/865 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5126 event pairs, 0 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 774. Up to 14 conditions per place. [2023-08-31 11:29:08,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 765 places, 795 transitions, 1650 flow [2023-08-31 11:29:08,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 765 places, 795 transitions, 1650 flow [2023-08-31 11:29:08,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:08,363 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 765 places, 795 transitions, 1650 flow [2023-08-31 11:29:08,364 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 765 places, 795 transitions, 1650 flow [2023-08-31 11:29:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 765 places, 795 transitions, 1650 flow [2023-08-31 11:29:08,560 INFO L130 PetriNetUnfolder]: 49/865 cut-off events. [2023-08-31 11:29:08,560 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:29:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 865 events. 49/865 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5126 event pairs, 0 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 774. Up to 14 conditions per place. [2023-08-31 11:29:08,644 INFO L119 LiptonReduction]: Number of co-enabled transitions 507492 [2023-08-31 11:29:15,117 INFO L134 LiptonReduction]: Checked pairs total: 2526994 [2023-08-31 11:29:15,117 INFO L136 LiptonReduction]: Total number of compositions: 507 [2023-08-31 11:29:15,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:15,119 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:15,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:15,160 INFO L130 PetriNetUnfolder]: 11/333 cut-off events. [2023-08-31 11:29:15,160 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:29:15,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:15,161 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:15,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:15,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash 133171506, now seen corresponding path program 1 times [2023-08-31 11:29:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:15,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139801248] [2023-08-31 11:29:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:15,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:15,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:15,210 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:15,210 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:15,210 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 11:29:15,211 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:15,211 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:15,211 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:15,211 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 11:29:15,250 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 888 places, 923 transitions, 1923 flow [2023-08-31 11:29:15,514 INFO L130 PetriNetUnfolder]: 57/1005 cut-off events. [2023-08-31 11:29:15,515 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:29:15,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 1005 events. 57/1005 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6139 event pairs, 0 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 901. Up to 16 conditions per place. [2023-08-31 11:29:15,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 888 places, 923 transitions, 1923 flow [2023-08-31 11:29:15,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 888 places, 923 transitions, 1923 flow [2023-08-31 11:29:15,548 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:15,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 888 places, 923 transitions, 1923 flow [2023-08-31 11:29:15,548 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 888 places, 923 transitions, 1923 flow [2023-08-31 11:29:15,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 888 places, 923 transitions, 1923 flow [2023-08-31 11:29:15,793 INFO L130 PetriNetUnfolder]: 57/1005 cut-off events. [2023-08-31 11:29:15,794 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:29:15,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 1005 events. 57/1005 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6139 event pairs, 0 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 901. Up to 16 conditions per place. [2023-08-31 11:29:15,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 705866 [2023-08-31 11:29:23,623 INFO L134 LiptonReduction]: Checked pairs total: 3517889 [2023-08-31 11:29:23,623 INFO L136 LiptonReduction]: Total number of compositions: 595 [2023-08-31 11:29:23,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:23,625 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:23,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:23,668 INFO L130 PetriNetUnfolder]: 16/420 cut-off events. [2023-08-31 11:29:23,668 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:29:23,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:23,668 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:23,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:23,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 495826452, now seen corresponding path program 1 times [2023-08-31 11:29:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:23,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407103528] [2023-08-31 11:29:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:23,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:23,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:23,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:23,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:23,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 11:29:23,713 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:23,713 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:23,714 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:23,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 11:29:23,783 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:23,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1011 places, 1051 transitions, 2198 flow [2023-08-31 11:29:24,170 INFO L130 PetriNetUnfolder]: 65/1145 cut-off events. [2023-08-31 11:29:24,170 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:29:24,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 1145 events. 65/1145 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7153 event pairs, 0 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 1043. Up to 18 conditions per place. [2023-08-31 11:29:24,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 1011 places, 1051 transitions, 2198 flow [2023-08-31 11:29:24,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1011 places, 1051 transitions, 2198 flow [2023-08-31 11:29:24,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:24,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1011 places, 1051 transitions, 2198 flow [2023-08-31 11:29:24,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1011 places, 1051 transitions, 2198 flow [2023-08-31 11:29:24,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1011 places, 1051 transitions, 2198 flow [2023-08-31 11:29:24,568 INFO L130 PetriNetUnfolder]: 65/1145 cut-off events. [2023-08-31 11:29:24,568 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:29:24,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 1145 events. 65/1145 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7153 event pairs, 0 based on Foata normal form. 0/815 useless extension candidates. Maximal degree in co-relation 1043. Up to 18 conditions per place. [2023-08-31 11:29:24,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 936752 [2023-08-31 11:29:33,577 INFO L134 LiptonReduction]: Checked pairs total: 4648140 [2023-08-31 11:29:33,577 INFO L136 LiptonReduction]: Total number of compositions: 682 [2023-08-31 11:29:33,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:33,579 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:33,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:33,647 INFO L130 PetriNetUnfolder]: 21/507 cut-off events. [2023-08-31 11:29:33,647 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:29:33,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:33,648 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:33,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:33,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash -934841393, now seen corresponding path program 1 times [2023-08-31 11:29:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:33,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348234218] [2023-08-31 11:29:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:33,694 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:33,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:33,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:33,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:33,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 11:29:33,706 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:33,706 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:33,706 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:33,706 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 11:29:33,748 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:33,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1134 places, 1179 transitions, 2475 flow [2023-08-31 11:29:34,151 INFO L130 PetriNetUnfolder]: 73/1285 cut-off events. [2023-08-31 11:29:34,151 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:29:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1285 events. 73/1285 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8215 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1194. Up to 20 conditions per place. [2023-08-31 11:29:34,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 1134 places, 1179 transitions, 2475 flow [2023-08-31 11:29:34,232 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1134 places, 1179 transitions, 2475 flow [2023-08-31 11:29:34,232 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:34,232 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1134 places, 1179 transitions, 2475 flow [2023-08-31 11:29:34,233 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1134 places, 1179 transitions, 2475 flow [2023-08-31 11:29:34,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1134 places, 1179 transitions, 2475 flow [2023-08-31 11:29:34,654 INFO L130 PetriNetUnfolder]: 73/1285 cut-off events. [2023-08-31 11:29:34,654 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:29:34,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1285 events. 73/1285 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8215 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1194. Up to 20 conditions per place. [2023-08-31 11:29:34,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 1200150 [2023-08-31 11:29:45,001 INFO L134 LiptonReduction]: Checked pairs total: 6007204 [2023-08-31 11:29:45,002 INFO L136 LiptonReduction]: Total number of compositions: 757 [2023-08-31 11:29:45,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:45,006 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:45,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:45,121 INFO L130 PetriNetUnfolder]: 26/594 cut-off events. [2023-08-31 11:29:45,121 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:29:45,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:45,121 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:45,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:45,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:45,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1236666549, now seen corresponding path program 1 times [2023-08-31 11:29:45,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:45,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786578879] [2023-08-31 11:29:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:45,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:45,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:45,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:45,158 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:45,158 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:45,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 11:29:45,158 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:45,159 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:45,159 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:45,159 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 11:29:45,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:45,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1257 places, 1307 transitions, 2754 flow [2023-08-31 11:29:45,759 INFO L130 PetriNetUnfolder]: 81/1425 cut-off events. [2023-08-31 11:29:45,759 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:29:45,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1511 conditions, 1425 events. 81/1425 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 9209 event pairs, 0 based on Foata normal form. 0/1013 useless extension candidates. Maximal degree in co-relation 1346. Up to 22 conditions per place. [2023-08-31 11:29:45,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 1257 places, 1307 transitions, 2754 flow [2023-08-31 11:29:45,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1257 places, 1307 transitions, 2754 flow [2023-08-31 11:29:45,858 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:45,858 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1257 places, 1307 transitions, 2754 flow [2023-08-31 11:29:45,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1257 places, 1307 transitions, 2754 flow [2023-08-31 11:29:45,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1257 places, 1307 transitions, 2754 flow [2023-08-31 11:29:46,336 INFO L130 PetriNetUnfolder]: 81/1425 cut-off events. [2023-08-31 11:29:46,337 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:29:46,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1511 conditions, 1425 events. 81/1425 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 9209 event pairs, 0 based on Foata normal form. 0/1013 useless extension candidates. Maximal degree in co-relation 1346. Up to 22 conditions per place. [2023-08-31 11:29:46,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 1496060 [2023-08-31 11:29:57,942 INFO L134 LiptonReduction]: Checked pairs total: 7504027 [2023-08-31 11:29:57,943 INFO L136 LiptonReduction]: Total number of compositions: 852 [2023-08-31 11:29:57,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:57,945 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:57,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:58,054 INFO L130 PetriNetUnfolder]: 31/681 cut-off events. [2023-08-31 11:29:58,054 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:29:58,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:58,055 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:58,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:58,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:58,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1600176133, now seen corresponding path program 1 times [2023-08-31 11:29:58,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:58,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998554822] [2023-08-31 11:29:58,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:58,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:58,070 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:58,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:58,081 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:58,081 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 11:29:58,082 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:58,082 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:58,082 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:58,082 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 11:29:58,140 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:58,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1380 places, 1435 transitions, 3035 flow [2023-08-31 11:29:58,807 INFO L130 PetriNetUnfolder]: 89/1565 cut-off events. [2023-08-31 11:29:58,807 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:29:58,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1665 conditions, 1565 events. 89/1565 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10171 event pairs, 0 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 1499. Up to 24 conditions per place. [2023-08-31 11:29:58,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 1380 places, 1435 transitions, 3035 flow [2023-08-31 11:29:58,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1380 places, 1435 transitions, 3035 flow [2023-08-31 11:29:58,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:58,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1380 places, 1435 transitions, 3035 flow [2023-08-31 11:29:58,877 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1380 places, 1435 transitions, 3035 flow [2023-08-31 11:29:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1380 places, 1435 transitions, 3035 flow [2023-08-31 11:29:59,447 INFO L130 PetriNetUnfolder]: 89/1565 cut-off events. [2023-08-31 11:29:59,448 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:29:59,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1665 conditions, 1565 events. 89/1565 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 10171 event pairs, 0 based on Foata normal form. 0/1112 useless extension candidates. Maximal degree in co-relation 1499. Up to 24 conditions per place. [2023-08-31 11:29:59,893 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824482 [2023-08-31 11:30:12,715 INFO L134 LiptonReduction]: Checked pairs total: 9180416 [2023-08-31 11:30:12,715 INFO L136 LiptonReduction]: Total number of compositions: 915 [2023-08-31 11:30:12,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:12,717 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:12,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:12,897 INFO L130 PetriNetUnfolder]: 36/768 cut-off events. [2023-08-31 11:30:12,897 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:30:12,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:12,897 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:30:12,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:12,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -844341877, now seen corresponding path program 1 times [2023-08-31 11:30:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561357404] [2023-08-31 11:30:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:12,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:12,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:12,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:12,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 11:30:12,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:12,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:12,940 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:12,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 11:30:13,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:13,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1503 places, 1563 transitions, 3318 flow [2023-08-31 11:30:13,697 INFO L130 PetriNetUnfolder]: 97/1705 cut-off events. [2023-08-31 11:30:13,697 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:30:13,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1820 conditions, 1705 events. 97/1705 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11194 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1653. Up to 26 conditions per place. [2023-08-31 11:30:13,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 1503 places, 1563 transitions, 3318 flow [2023-08-31 11:30:13,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1503 places, 1563 transitions, 3318 flow [2023-08-31 11:30:13,847 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:13,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1503 places, 1563 transitions, 3318 flow [2023-08-31 11:30:13,847 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1503 places, 1563 transitions, 3318 flow [2023-08-31 11:30:13,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1503 places, 1563 transitions, 3318 flow [2023-08-31 11:30:14,512 INFO L130 PetriNetUnfolder]: 97/1705 cut-off events. [2023-08-31 11:30:14,512 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:30:14,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1820 conditions, 1705 events. 97/1705 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11194 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1653. Up to 26 conditions per place. [2023-08-31 11:30:14,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 2185416 [2023-08-31 11:30:28,858 INFO L134 LiptonReduction]: Checked pairs total: 11022109 [2023-08-31 11:30:28,858 INFO L136 LiptonReduction]: Total number of compositions: 1005 [2023-08-31 11:30:28,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:28,860 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:28,860 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:29,068 INFO L130 PetriNetUnfolder]: 41/855 cut-off events. [2023-08-31 11:30:29,068 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:30:29,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:29,068 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:30:29,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:29,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1161186188, now seen corresponding path program 1 times [2023-08-31 11:30:29,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:29,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232639886] [2023-08-31 11:30:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:29,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:29,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:29,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:29,132 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:29,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:29,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 11:30:29,132 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:29,134 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:29,134 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:29,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 11:30:29,200 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:29,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1626 places, 1691 transitions, 3603 flow [2023-08-31 11:30:30,086 INFO L130 PetriNetUnfolder]: 105/1845 cut-off events. [2023-08-31 11:30:30,086 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:30:30,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 1845 events. 105/1845 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 12127 event pairs, 0 based on Foata normal form. 0/1310 useless extension candidates. Maximal degree in co-relation 1808. Up to 28 conditions per place. [2023-08-31 11:30:30,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 1626 places, 1691 transitions, 3603 flow [2023-08-31 11:30:30,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1626 places, 1691 transitions, 3603 flow [2023-08-31 11:30:30,207 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:30,207 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1626 places, 1691 transitions, 3603 flow [2023-08-31 11:30:30,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1626 places, 1691 transitions, 3603 flow [2023-08-31 11:30:30,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1626 places, 1691 transitions, 3603 flow [2023-08-31 11:30:31,155 INFO L130 PetriNetUnfolder]: 105/1845 cut-off events. [2023-08-31 11:30:31,155 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:30:31,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 1845 events. 105/1845 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 12127 event pairs, 0 based on Foata normal form. 0/1310 useless extension candidates. Maximal degree in co-relation 1808. Up to 28 conditions per place. [2023-08-31 11:30:31,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 2578862 [2023-08-31 11:30:46,914 INFO L134 LiptonReduction]: Checked pairs total: 12902777 [2023-08-31 11:30:46,914 INFO L136 LiptonReduction]: Total number of compositions: 1103 [2023-08-31 11:30:46,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:46,916 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:46,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:47,203 INFO L130 PetriNetUnfolder]: 46/942 cut-off events. [2023-08-31 11:30:47,203 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:30:47,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:47,204 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:30:47,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:47,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1212859103, now seen corresponding path program 1 times [2023-08-31 11:30:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:47,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149743285] [2023-08-31 11:30:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:47,221 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:47,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:47,237 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:47,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:47,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 11:30:47,237 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:47,237 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:47,237 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:47,237 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 11:30:47,299 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:47,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1749 places, 1819 transitions, 3890 flow [2023-08-31 11:30:48,340 INFO L130 PetriNetUnfolder]: 113/1985 cut-off events. [2023-08-31 11:30:48,340 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:30:48,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 1985 events. 113/1985 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 13119 event pairs, 0 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 1964. Up to 30 conditions per place. [2023-08-31 11:30:48,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 1749 places, 1819 transitions, 3890 flow [2023-08-31 11:30:48,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1749 places, 1819 transitions, 3890 flow [2023-08-31 11:30:48,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:48,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1749 places, 1819 transitions, 3890 flow [2023-08-31 11:30:48,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1749 places, 1819 transitions, 3890 flow [2023-08-31 11:30:48,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1749 places, 1819 transitions, 3890 flow [2023-08-31 11:30:49,635 INFO L130 PetriNetUnfolder]: 113/1985 cut-off events. [2023-08-31 11:30:49,636 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:30:49,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2133 conditions, 1985 events. 113/1985 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 13119 event pairs, 0 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 1964. Up to 30 conditions per place. [2023-08-31 11:30:50,240 INFO L119 LiptonReduction]: Number of co-enabled transitions 3004820 [2023-08-31 11:31:07,777 INFO L134 LiptonReduction]: Checked pairs total: 15050347 [2023-08-31 11:31:07,778 INFO L136 LiptonReduction]: Total number of compositions: 1211 [2023-08-31 11:31:07,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:07,779 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:07,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:08,053 INFO L130 PetriNetUnfolder]: 51/1029 cut-off events. [2023-08-31 11:31:08,053 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:31:08,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:08,053 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:31:08,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:08,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:08,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1337835322, now seen corresponding path program 1 times [2023-08-31 11:31:08,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:08,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640902327] [2023-08-31 11:31:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:08,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:08,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:08,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:08,088 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:08,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 11:31:08,088 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:08,088 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:08,088 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:08,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 11:31:08,158 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:08,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1872 places, 1947 transitions, 4179 flow [2023-08-31 11:31:09,331 INFO L130 PetriNetUnfolder]: 121/2125 cut-off events. [2023-08-31 11:31:09,331 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:31:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 2125 events. 121/2125 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 14110 event pairs, 0 based on Foata normal form. 0/1508 useless extension candidates. Maximal degree in co-relation 2121. Up to 32 conditions per place. [2023-08-31 11:31:09,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 1872 places, 1947 transitions, 4179 flow [2023-08-31 11:31:09,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1872 places, 1947 transitions, 4179 flow [2023-08-31 11:31:09,528 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:09,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1872 places, 1947 transitions, 4179 flow [2023-08-31 11:31:09,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1872 places, 1947 transitions, 4179 flow [2023-08-31 11:31:09,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1872 places, 1947 transitions, 4179 flow [2023-08-31 11:31:10,674 INFO L130 PetriNetUnfolder]: 121/2125 cut-off events. [2023-08-31 11:31:10,674 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:31:10,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 2125 events. 121/2125 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 14110 event pairs, 0 based on Foata normal form. 0/1508 useless extension candidates. Maximal degree in co-relation 2121. Up to 32 conditions per place. [2023-08-31 11:31:11,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 3463290 [2023-08-31 11:31:30,074 INFO L134 LiptonReduction]: Checked pairs total: 17567641 [2023-08-31 11:31:30,074 INFO L136 LiptonReduction]: Total number of compositions: 1232 [2023-08-31 11:31:30,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:30,076 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:30,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:30,396 INFO L130 PetriNetUnfolder]: 56/1116 cut-off events. [2023-08-31 11:31:30,396 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:31:30,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:30,396 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:31:30,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:30,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1970489178, now seen corresponding path program 1 times [2023-08-31 11:31:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:30,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284043766] [2023-08-31 11:31:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:30,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:30,434 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:30,434 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:30,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:30,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 11:31:30,434 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:30,435 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:30,435 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:30,435 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 11:31:30,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:30,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1995 places, 2075 transitions, 4470 flow [2023-08-31 11:31:31,828 INFO L130 PetriNetUnfolder]: 129/2265 cut-off events. [2023-08-31 11:31:31,829 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:31:32,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 2265 events. 129/2265 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 15142 event pairs, 0 based on Foata normal form. 0/1607 useless extension candidates. Maximal degree in co-relation 2279. Up to 34 conditions per place. [2023-08-31 11:31:32,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 1995 places, 2075 transitions, 4470 flow [2023-08-31 11:31:32,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1995 places, 2075 transitions, 4470 flow [2023-08-31 11:31:32,061 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:32,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1995 places, 2075 transitions, 4470 flow [2023-08-31 11:31:32,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1995 places, 2075 transitions, 4470 flow [2023-08-31 11:31:32,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1995 places, 2075 transitions, 4470 flow [2023-08-31 11:31:33,370 INFO L130 PetriNetUnfolder]: 129/2265 cut-off events. [2023-08-31 11:31:33,370 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:31:33,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 2265 events. 129/2265 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 15142 event pairs, 0 based on Foata normal form. 0/1607 useless extension candidates. Maximal degree in co-relation 2279. Up to 34 conditions per place. [2023-08-31 11:31:34,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 3954272 [2023-08-31 11:31:54,417 INFO L134 LiptonReduction]: Checked pairs total: 19848595 [2023-08-31 11:31:54,417 INFO L136 LiptonReduction]: Total number of compositions: 1354 [2023-08-31 11:31:54,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:54,419 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:54,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:54,791 INFO L130 PetriNetUnfolder]: 61/1203 cut-off events. [2023-08-31 11:31:54,791 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:31:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:54,791 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:31:54,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:54,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 536619995, now seen corresponding path program 1 times [2023-08-31 11:31:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:54,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005834978] [2023-08-31 11:31:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:54,813 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:54,831 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:54,831 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:54,831 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 11:31:54,831 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:54,832 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:54,832 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:54,832 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 11:31:54,925 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2118 places, 2203 transitions, 4763 flow [2023-08-31 11:31:56,537 INFO L130 PetriNetUnfolder]: 137/2405 cut-off events. [2023-08-31 11:31:56,537 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:31:56,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2610 conditions, 2405 events. 137/2405 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 16144 event pairs, 0 based on Foata normal form. 0/1706 useless extension candidates. Maximal degree in co-relation 2438. Up to 36 conditions per place. [2023-08-31 11:31:56,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 2118 places, 2203 transitions, 4763 flow [2023-08-31 11:31:56,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2118 places, 2203 transitions, 4763 flow [2023-08-31 11:31:56,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:56,772 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2118 places, 2203 transitions, 4763 flow [2023-08-31 11:31:56,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2118 places, 2203 transitions, 4763 flow [2023-08-31 11:31:56,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2118 places, 2203 transitions, 4763 flow [2023-08-31 11:31:58,445 INFO L130 PetriNetUnfolder]: 137/2405 cut-off events. [2023-08-31 11:31:58,445 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:31:58,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2610 conditions, 2405 events. 137/2405 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 16144 event pairs, 0 based on Foata normal form. 0/1706 useless extension candidates. Maximal degree in co-relation 2438. Up to 36 conditions per place. [2023-08-31 11:31:59,181 INFO L119 LiptonReduction]: Number of co-enabled transitions 4477766 [2023-08-31 11:32:20,491 INFO L134 LiptonReduction]: Checked pairs total: 22541728 [2023-08-31 11:32:20,491 INFO L136 LiptonReduction]: Total number of compositions: 1422 [2023-08-31 11:32:20,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:32:20,493 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:32:20,493 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:32:20,916 INFO L130 PetriNetUnfolder]: 66/1290 cut-off events. [2023-08-31 11:32:20,916 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:32:20,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:32:20,916 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:32:20,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:32:20,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:32:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1686161714, now seen corresponding path program 1 times [2023-08-31 11:32:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:32:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546125804] [2023-08-31 11:32:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:32:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:32:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:20,937 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:32:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:20,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:32:20,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:32:20,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:32:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 11:32:20,955 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:32:20,956 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:32:20,956 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:32:20,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 11:32:21,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:32:21,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2241 places, 2331 transitions, 5058 flow [2023-08-31 11:32:22,892 INFO L130 PetriNetUnfolder]: 145/2545 cut-off events. [2023-08-31 11:32:22,892 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:32:23,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2771 conditions, 2545 events. 145/2545 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 17112 event pairs, 0 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 2598. Up to 38 conditions per place. [2023-08-31 11:32:23,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 2241 places, 2331 transitions, 5058 flow [2023-08-31 11:32:23,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2241 places, 2331 transitions, 5058 flow [2023-08-31 11:32:23,152 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:32:23,152 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2241 places, 2331 transitions, 5058 flow [2023-08-31 11:32:23,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2241 places, 2331 transitions, 5058 flow [2023-08-31 11:32:23,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2241 places, 2331 transitions, 5058 flow [2023-08-31 11:32:25,000 INFO L130 PetriNetUnfolder]: 145/2545 cut-off events. [2023-08-31 11:32:25,001 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:32:25,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2771 conditions, 2545 events. 145/2545 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 17112 event pairs, 0 based on Foata normal form. 0/1805 useless extension candidates. Maximal degree in co-relation 2598. Up to 38 conditions per place. [2023-08-31 11:32:25,904 INFO L119 LiptonReduction]: Number of co-enabled transitions 5033772 [2023-08-31 11:32:48,866 INFO L134 LiptonReduction]: Checked pairs total: 25349089 [2023-08-31 11:32:48,866 INFO L136 LiptonReduction]: Total number of compositions: 1499 [2023-08-31 11:32:48,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:32:48,868 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:32:48,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:32:49,363 INFO L130 PetriNetUnfolder]: 71/1377 cut-off events. [2023-08-31 11:32:49,363 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:32:49,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:32:49,363 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:32:49,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:32:49,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:32:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash 836097357, now seen corresponding path program 1 times [2023-08-31 11:32:49,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:32:49,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000840626] [2023-08-31 11:32:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:32:49,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:32:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:49,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:32:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:49,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:32:49,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:32:49,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:32:49,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 11:32:49,406 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:32:49,407 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:32:49,407 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:32:49,407 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 11:32:49,494 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:32:49,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2364 places, 2459 transitions, 5355 flow [2023-08-31 11:32:51,344 INFO L130 PetriNetUnfolder]: 153/2685 cut-off events. [2023-08-31 11:32:51,344 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:32:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 2685 events. 153/2685 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 18158 event pairs, 0 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 2759. Up to 40 conditions per place. [2023-08-31 11:32:51,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 2364 places, 2459 transitions, 5355 flow [2023-08-31 11:32:51,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2364 places, 2459 transitions, 5355 flow [2023-08-31 11:32:51,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:32:51,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2364 places, 2459 transitions, 5355 flow [2023-08-31 11:32:51,693 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2364 places, 2459 transitions, 5355 flow [2023-08-31 11:32:51,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2364 places, 2459 transitions, 5355 flow [2023-08-31 11:32:53,874 INFO L130 PetriNetUnfolder]: 153/2685 cut-off events. [2023-08-31 11:32:53,875 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:32:54,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 2685 events. 153/2685 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 18158 event pairs, 0 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 2759. Up to 40 conditions per place. [2023-08-31 11:32:54,968 INFO L119 LiptonReduction]: Number of co-enabled transitions 5622290 [2023-08-31 11:33:19,985 INFO L134 LiptonReduction]: Checked pairs total: 28269874 [2023-08-31 11:33:19,985 INFO L136 LiptonReduction]: Total number of compositions: 1597 [2023-08-31 11:33:19,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:33:19,986 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:33:19,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:33:20,617 INFO L130 PetriNetUnfolder]: 76/1464 cut-off events. [2023-08-31 11:33:20,617 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:33:20,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:33:20,617 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:33:20,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:33:20,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:33:20,617 INFO L85 PathProgramCache]: Analyzing trace with hash 3547100, now seen corresponding path program 1 times [2023-08-31 11:33:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:33:20,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913542587] [2023-08-31 11:33:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:33:20,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:33:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:20,646 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:33:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:20,667 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:33:20,667 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:33:20,667 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:33:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 11:33:20,667 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:33:20,668 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:33:20,668 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:33:20,668 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 11:33:20,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:33:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2487 places, 2587 transitions, 5654 flow [2023-08-31 11:33:22,956 INFO L130 PetriNetUnfolder]: 161/2825 cut-off events. [2023-08-31 11:33:22,956 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:33:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 2825 events. 161/2825 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 19093 event pairs, 0 based on Foata normal form. 0/2003 useless extension candidates. Maximal degree in co-relation 2921. Up to 42 conditions per place. [2023-08-31 11:33:23,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 2487 places, 2587 transitions, 5654 flow [2023-08-31 11:33:23,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2487 places, 2587 transitions, 5654 flow [2023-08-31 11:33:23,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:33:23,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2487 places, 2587 transitions, 5654 flow [2023-08-31 11:33:23,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2487 places, 2587 transitions, 5654 flow [2023-08-31 11:33:23,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2487 places, 2587 transitions, 5654 flow [2023-08-31 11:33:25,472 INFO L130 PetriNetUnfolder]: 161/2825 cut-off events. [2023-08-31 11:33:25,472 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:33:25,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 2825 events. 161/2825 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 19093 event pairs, 0 based on Foata normal form. 0/2003 useless extension candidates. Maximal degree in co-relation 2921. Up to 42 conditions per place. [2023-08-31 11:33:26,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 6243320 [2023-08-31 11:33:54,211 INFO L134 LiptonReduction]: Checked pairs total: 31431819 [2023-08-31 11:33:54,211 INFO L136 LiptonReduction]: Total number of compositions: 1671 [2023-08-31 11:33:54,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:33:54,213 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:33:54,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:33:54,946 INFO L130 PetriNetUnfolder]: 81/1551 cut-off events. [2023-08-31 11:33:54,946 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:33:54,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:33:54,947 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:33:54,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:33:54,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:33:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1401263635, now seen corresponding path program 1 times [2023-08-31 11:33:54,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:33:54,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529834628] [2023-08-31 11:33:54,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:33:54,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:33:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:54,986 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:33:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:55,009 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:33:55,009 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:33:55,009 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:33:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 11:33:55,009 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:33:55,010 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:33:55,010 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:33:55,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 11:33:55,133 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:33:55,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2610 places, 2715 transitions, 5955 flow [2023-08-31 11:33:57,600 INFO L130 PetriNetUnfolder]: 169/2965 cut-off events. [2023-08-31 11:33:57,600 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:33:57,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2965 events. 169/2965 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 20076 event pairs, 0 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 3084. Up to 44 conditions per place. [2023-08-31 11:33:57,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 2610 places, 2715 transitions, 5955 flow [2023-08-31 11:33:57,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2610 places, 2715 transitions, 5955 flow [2023-08-31 11:33:57,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:33:57,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2610 places, 2715 transitions, 5955 flow [2023-08-31 11:33:57,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2610 places, 2715 transitions, 5955 flow [2023-08-31 11:33:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2610 places, 2715 transitions, 5955 flow [2023-08-31 11:34:00,470 INFO L130 PetriNetUnfolder]: 169/2965 cut-off events. [2023-08-31 11:34:00,471 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:34:00,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2965 events. 169/2965 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 20076 event pairs, 0 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 3084. Up to 44 conditions per place. [2023-08-31 11:34:01,763 INFO L119 LiptonReduction]: Number of co-enabled transitions 6896862 [2023-08-31 11:34:30,266 INFO L134 LiptonReduction]: Checked pairs total: 34809969 [2023-08-31 11:34:30,266 INFO L136 LiptonReduction]: Total number of compositions: 1719 [2023-08-31 11:34:30,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:34:30,268 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:34:30,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:34:30,979 INFO L130 PetriNetUnfolder]: 86/1638 cut-off events. [2023-08-31 11:34:30,980 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:34:30,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:34:30,980 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:34:30,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:34:30,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:34:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 196317247, now seen corresponding path program 1 times [2023-08-31 11:34:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:34:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87274864] [2023-08-31 11:34:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:34:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:34:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:31,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:34:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:31,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:34:31,027 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:34:31,027 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:34:31,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 11:34:31,027 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:34:31,027 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:34:31,027 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:34:31,028 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 11:34:31,129 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:34:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2733 places, 2843 transitions, 6258 flow [2023-08-31 11:34:33,807 INFO L130 PetriNetUnfolder]: 177/3105 cut-off events. [2023-08-31 11:34:33,807 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:34:34,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 3105 events. 177/3105 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 21120 event pairs, 0 based on Foata normal form. 0/2201 useless extension candidates. Maximal degree in co-relation 3248. Up to 46 conditions per place. [2023-08-31 11:34:34,128 INFO L82 GeneralOperation]: Start removeDead. Operand has 2733 places, 2843 transitions, 6258 flow [2023-08-31 11:34:34,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2733 places, 2843 transitions, 6258 flow [2023-08-31 11:34:34,167 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:34:34,168 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2733 places, 2843 transitions, 6258 flow [2023-08-31 11:34:34,168 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2733 places, 2843 transitions, 6258 flow [2023-08-31 11:34:34,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2733 places, 2843 transitions, 6258 flow [2023-08-31 11:34:36,964 INFO L130 PetriNetUnfolder]: 177/3105 cut-off events. [2023-08-31 11:34:36,964 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:34:37,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 3105 events. 177/3105 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 21120 event pairs, 0 based on Foata normal form. 0/2201 useless extension candidates. Maximal degree in co-relation 3248. Up to 46 conditions per place. [2023-08-31 11:34:38,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 7582916 [2023-08-31 11:35:09,367 INFO L134 LiptonReduction]: Checked pairs total: 38215545 [2023-08-31 11:35:09,368 INFO L136 LiptonReduction]: Total number of compositions: 1811 [2023-08-31 11:35:09,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:35:09,369 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:35:09,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:35:10,289 INFO L130 PetriNetUnfolder]: 91/1725 cut-off events. [2023-08-31 11:35:10,290 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:35:10,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:35:10,290 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:35:10,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:35:10,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:35:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1488335945, now seen corresponding path program 1 times [2023-08-31 11:35:10,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:35:10,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947428214] [2023-08-31 11:35:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:35:10,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:35:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:10,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:35:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:10,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:35:10,341 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:35:10,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:35:10,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 11:35:10,341 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:35:10,342 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:35:10,342 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:35:10,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 11:35:10,460 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:35:10,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2856 places, 2971 transitions, 6563 flow [2023-08-31 11:35:13,374 INFO L130 PetriNetUnfolder]: 185/3245 cut-off events. [2023-08-31 11:35:13,374 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:35:13,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 3245 events. 185/3245 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 22112 event pairs, 0 based on Foata normal form. 0/2300 useless extension candidates. Maximal degree in co-relation 3413. Up to 48 conditions per place. [2023-08-31 11:35:13,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 2856 places, 2971 transitions, 6563 flow [2023-08-31 11:35:13,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2856 places, 2971 transitions, 6563 flow [2023-08-31 11:35:13,740 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:35:13,740 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2856 places, 2971 transitions, 6563 flow [2023-08-31 11:35:13,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2856 places, 2971 transitions, 6563 flow [2023-08-31 11:35:13,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2856 places, 2971 transitions, 6563 flow [2023-08-31 11:35:16,696 INFO L130 PetriNetUnfolder]: 185/3245 cut-off events. [2023-08-31 11:35:16,696 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:35:17,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 3245 events. 185/3245 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 22112 event pairs, 0 based on Foata normal form. 0/2300 useless extension candidates. Maximal degree in co-relation 3413. Up to 48 conditions per place. [2023-08-31 11:35:18,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 8301482 [2023-08-31 11:35:50,339 INFO L134 LiptonReduction]: Checked pairs total: 41936538 [2023-08-31 11:35:50,339 INFO L136 LiptonReduction]: Total number of compositions: 1905 [2023-08-31 11:35:50,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:35:50,340 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:35:50,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:35:51,312 INFO L130 PetriNetUnfolder]: 96/1812 cut-off events. [2023-08-31 11:35:51,313 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:35:51,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:35:51,313 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:35:51,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:35:51,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:35:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash -272963128, now seen corresponding path program 1 times [2023-08-31 11:35:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:35:51,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396064559] [2023-08-31 11:35:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:35:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:35:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:51,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:35:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:51,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:35:51,364 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:35:51,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:35:51,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 11:35:51,364 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:35:51,365 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:35:51,365 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:35:51,365 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 11:35:51,519 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:35:51,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2979 places, 3099 transitions, 6870 flow [2023-08-31 11:35:54,858 INFO L130 PetriNetUnfolder]: 193/3385 cut-off events. [2023-08-31 11:35:54,858 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:35:55,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3758 conditions, 3385 events. 193/3385 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 23115 event pairs, 0 based on Foata normal form. 0/2399 useless extension candidates. Maximal degree in co-relation 3579. Up to 50 conditions per place. [2023-08-31 11:35:55,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 2979 places, 3099 transitions, 6870 flow [2023-08-31 11:35:55,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2979 places, 3099 transitions, 6870 flow [2023-08-31 11:35:55,248 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:35:55,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2979 places, 3099 transitions, 6870 flow [2023-08-31 11:35:55,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2979 places, 3099 transitions, 6870 flow [2023-08-31 11:35:55,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2979 places, 3099 transitions, 6870 flow [2023-08-31 11:35:58,344 INFO L130 PetriNetUnfolder]: 193/3385 cut-off events. [2023-08-31 11:35:58,344 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:35:58,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3758 conditions, 3385 events. 193/3385 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 23115 event pairs, 0 based on Foata normal form. 0/2399 useless extension candidates. Maximal degree in co-relation 3579. Up to 50 conditions per place. [2023-08-31 11:36:00,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 9052560 [2023-08-31 11:36:34,870 INFO L134 LiptonReduction]: Checked pairs total: 45574005 [2023-08-31 11:36:34,870 INFO L136 LiptonReduction]: Total number of compositions: 2016 [2023-08-31 11:36:34,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:36:34,872 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:36:34,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:36:35,946 INFO L130 PetriNetUnfolder]: 101/1899 cut-off events. [2023-08-31 11:36:35,946 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:36:35,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:36:35,946 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:36:35,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:36:35,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:36:35,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1735047312, now seen corresponding path program 1 times [2023-08-31 11:36:35,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:36:35,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019900866] [2023-08-31 11:36:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:36:35,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:36:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:36:35,975 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:36:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:36:36,002 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:36:36,002 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:36:36,002 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:36:36,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 11:36:36,002 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:36:36,003 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:36:36,003 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:36:36,003 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 11:36:36,134 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:36:36,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3102 places, 3227 transitions, 7179 flow [2023-08-31 11:36:39,760 INFO L130 PetriNetUnfolder]: 201/3525 cut-off events. [2023-08-31 11:36:39,761 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:36:40,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 3525 events. 201/3525 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 24140 event pairs, 0 based on Foata normal form. 0/2498 useless extension candidates. Maximal degree in co-relation 3746. Up to 52 conditions per place. [2023-08-31 11:36:40,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 3102 places, 3227 transitions, 7179 flow [2023-08-31 11:36:40,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3102 places, 3227 transitions, 7179 flow [2023-08-31 11:36:40,193 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:36:40,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3102 places, 3227 transitions, 7179 flow [2023-08-31 11:36:40,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3102 places, 3227 transitions, 7179 flow [2023-08-31 11:36:40,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3102 places, 3227 transitions, 7179 flow [2023-08-31 11:36:43,685 INFO L130 PetriNetUnfolder]: 201/3525 cut-off events. [2023-08-31 11:36:43,685 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:36:44,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 3525 events. 201/3525 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 24140 event pairs, 0 based on Foata normal form. 0/2498 useless extension candidates. Maximal degree in co-relation 3746. Up to 52 conditions per place. [2023-08-31 11:36:45,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 9836150 [2023-08-31 11:37:22,540 INFO L134 LiptonReduction]: Checked pairs total: 49483775 [2023-08-31 11:37:22,540 INFO L136 LiptonReduction]: Total number of compositions: 2076 [2023-08-31 11:37:22,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:37:22,542 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:37:22,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:37:23,831 INFO L130 PetriNetUnfolder]: 106/1986 cut-off events. [2023-08-31 11:37:23,832 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:37:23,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:37:23,832 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:37:23,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:37:23,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:37:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 840920404, now seen corresponding path program 1 times [2023-08-31 11:37:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:37:23,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822504525] [2023-08-31 11:37:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:37:23,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:37:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:37:23,863 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:37:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:37:23,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:37:23,891 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:37:23,892 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:37:23,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 11:37:23,892 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:37:23,892 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:37:23,892 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:37:23,892 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 11:37:24,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:37:24,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3225 places, 3355 transitions, 7490 flow [2023-08-31 11:37:27,963 INFO L130 PetriNetUnfolder]: 209/3665 cut-off events. [2023-08-31 11:37:27,963 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:37:28,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4095 conditions, 3665 events. 209/3665 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 25163 event pairs, 0 based on Foata normal form. 0/2597 useless extension candidates. Maximal degree in co-relation 3914. Up to 54 conditions per place. [2023-08-31 11:37:28,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 3225 places, 3355 transitions, 7490 flow [2023-08-31 11:37:28,482 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3225 places, 3355 transitions, 7490 flow [2023-08-31 11:37:28,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:37:28,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3225 places, 3355 transitions, 7490 flow [2023-08-31 11:37:28,482 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3225 places, 3355 transitions, 7490 flow [2023-08-31 11:37:28,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3225 places, 3355 transitions, 7490 flow [2023-08-31 11:37:32,507 INFO L130 PetriNetUnfolder]: 209/3665 cut-off events. [2023-08-31 11:37:32,508 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:37:32,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4095 conditions, 3665 events. 209/3665 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 25163 event pairs, 0 based on Foata normal form. 0/2597 useless extension candidates. Maximal degree in co-relation 3914. Up to 54 conditions per place. [2023-08-31 11:37:34,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 10652252 [2023-08-31 11:38:13,082 INFO L134 LiptonReduction]: Checked pairs total: 53534153 [2023-08-31 11:38:13,082 INFO L136 LiptonReduction]: Total number of compositions: 2175 [2023-08-31 11:38:13,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:38:13,084 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:38:13,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:38:14,332 INFO L130 PetriNetUnfolder]: 111/2073 cut-off events. [2023-08-31 11:38:14,332 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:38:14,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:38:14,332 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:38:14,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:38:14,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:38:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2058330974, now seen corresponding path program 1 times [2023-08-31 11:38:14,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:38:14,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023680849] [2023-08-31 11:38:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:38:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:38:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:38:14,367 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:38:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:38:14,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:38:14,394 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:38:14,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:38:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 11:38:14,394 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:38:14,395 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:38:14,395 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:38:14,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 11:38:14,526 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:38:14,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3348 places, 3483 transitions, 7803 flow [2023-08-31 11:38:18,877 INFO L130 PetriNetUnfolder]: 217/3805 cut-off events. [2023-08-31 11:38:18,877 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:38:19,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 3805 events. 217/3805 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 26153 event pairs, 0 based on Foata normal form. 0/2696 useless extension candidates. Maximal degree in co-relation 4083. Up to 56 conditions per place. [2023-08-31 11:38:19,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 3348 places, 3483 transitions, 7803 flow [2023-08-31 11:38:19,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3348 places, 3483 transitions, 7803 flow [2023-08-31 11:38:19,438 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:38:19,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3348 places, 3483 transitions, 7803 flow [2023-08-31 11:38:19,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3348 places, 3483 transitions, 7803 flow [2023-08-31 11:38:19,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3348 places, 3483 transitions, 7803 flow [2023-08-31 11:38:23,763 INFO L130 PetriNetUnfolder]: 217/3805 cut-off events. [2023-08-31 11:38:23,763 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:38:24,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 3805 events. 217/3805 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 26153 event pairs, 0 based on Foata normal form. 0/2696 useless extension candidates. Maximal degree in co-relation 4083. Up to 56 conditions per place. [2023-08-31 11:38:26,235 INFO L119 LiptonReduction]: Number of co-enabled transitions 11500866 [2023-08-31 11:39:06,410 INFO L134 LiptonReduction]: Checked pairs total: 57848631 [2023-08-31 11:39:06,410 INFO L136 LiptonReduction]: Total number of compositions: 2256 [2023-08-31 11:39:06,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:39:06,412 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:39:06,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:39:07,763 INFO L130 PetriNetUnfolder]: 116/2160 cut-off events. [2023-08-31 11:39:07,763 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:39:07,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:39:07,763 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:39:07,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:39:07,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:39:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1173173756, now seen corresponding path program 1 times [2023-08-31 11:39:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:39:07,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670106908] [2023-08-31 11:39:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:39:07,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:39:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:39:07,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:39:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:39:07,832 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:39:07,832 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:39:07,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:39:07,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 11:39:07,833 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:39:07,833 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:39:07,833 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:39:07,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 11:39:07,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:39:07,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3471 places, 3611 transitions, 8118 flow [2023-08-31 11:39:12,711 INFO L130 PetriNetUnfolder]: 225/3945 cut-off events. [2023-08-31 11:39:12,711 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:39:13,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 3945 events. 225/3945 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 27165 event pairs, 0 based on Foata normal form. 0/2795 useless extension candidates. Maximal degree in co-relation 4253. Up to 58 conditions per place. [2023-08-31 11:39:13,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 3471 places, 3611 transitions, 8118 flow [2023-08-31 11:39:13,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3471 places, 3611 transitions, 8118 flow [2023-08-31 11:39:13,303 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:39:13,303 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3471 places, 3611 transitions, 8118 flow [2023-08-31 11:39:13,303 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3471 places, 3611 transitions, 8118 flow [2023-08-31 11:39:13,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3471 places, 3611 transitions, 8118 flow [2023-08-31 11:39:18,025 INFO L130 PetriNetUnfolder]: 225/3945 cut-off events. [2023-08-31 11:39:18,025 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:39:18,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 3945 events. 225/3945 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 27165 event pairs, 0 based on Foata normal form. 0/2795 useless extension candidates. Maximal degree in co-relation 4253. Up to 58 conditions per place. [2023-08-31 11:39:20,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 12381992 [2023-08-31 11:40:04,203 INFO L134 LiptonReduction]: Checked pairs total: 62520568 [2023-08-31 11:40:04,203 INFO L136 LiptonReduction]: Total number of compositions: 2317 [2023-08-31 11:40:04,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:40:04,204 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@48432562, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:40:04,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:40:05,792 INFO L130 PetriNetUnfolder]: 121/2247 cut-off events. [2023-08-31 11:40:05,792 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:40:05,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:40:05,792 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:40:05,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:40:05,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:40:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 924504233, now seen corresponding path program 1 times [2023-08-31 11:40:05,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:40:05,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344220410] [2023-08-31 11:40:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:40:05,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:40:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:05,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:40:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:05,862 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:40:05,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:40:05,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:40:05,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 11:40:05,863 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:40:05,863 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:40:05,863 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:40:05,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 11:40:06,012 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:40:06,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3594 places, 3739 transitions, 8435 flow [2023-08-31 11:40:11,170 INFO L130 PetriNetUnfolder]: 233/4085 cut-off events. [2023-08-31 11:40:11,171 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:40:11,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4608 conditions, 4085 events. 233/4085 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 28159 event pairs, 0 based on Foata normal form. 0/2894 useless extension candidates. Maximal degree in co-relation 4424. Up to 60 conditions per place. [2023-08-31 11:40:11,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 3594 places, 3739 transitions, 8435 flow [2023-08-31 11:40:11,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 3594 places, 3739 transitions, 8435 flow [2023-08-31 11:40:11,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:40:11,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 3594 places, 3739 transitions, 8435 flow [2023-08-31 11:40:11,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 3594 places, 3739 transitions, 8435 flow [2023-08-31 11:40:11,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 3594 places, 3739 transitions, 8435 flow [2023-08-31 11:40:16,815 INFO L130 PetriNetUnfolder]: 233/4085 cut-off events. [2023-08-31 11:40:16,816 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:40:17,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4608 conditions, 4085 events. 233/4085 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 28159 event pairs, 0 based on Foata normal form. 0/2894 useless extension candidates. Maximal degree in co-relation 4424. Up to 60 conditions per place. [2023-08-31 11:40:19,607 INFO L119 LiptonReduction]: Number of co-enabled transitions 13295630