./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --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 22:45:14,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:45:14,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:45:14,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:45:14,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:45:14,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:45:14,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:45:14,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:45:14,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:45:14,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:45:14,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:45:14,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:45:14,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:45:14,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:45:14,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:45:14,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:45:14,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:45:14,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:45:14,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:45:14,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:45:14,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:45:14,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:45:14,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:45:14,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:45:14,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:45:14,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:45:14,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:45:14,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:45:14,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:45:14,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:45:14,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:45:14,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:45:14,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:45:14,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:45:14,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:45:14,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:45:14,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:45:14,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:45:14,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:45:14,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:45:14,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:45:14,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:45:14,408 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:45:14,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:45:14,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:45:14,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:45:14,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:45:14,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:45:14,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:45:14,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:45:14,412 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:45:14,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:45:14,413 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:45:14,413 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:45:14,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:45:14,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:45:14,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:45:14,414 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:45:14,414 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:45:14,414 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:45:14,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:45:14,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:45:14,415 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:45:14,415 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:45:14,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:45:14,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:45:14,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:45:14,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:45:14,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:45:14,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:45:14,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:45:14,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:45:14,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:45:14,418 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:45:14,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:45:14,418 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:45:14,418 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:45:14,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:45:14,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:45:14,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:45:14,744 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:45:14,744 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:45:14,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-31 22:45:15,860 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:45:16,118 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:45:16,121 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-31 22:45:16,139 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f4657c6a/d24dcd8e9bf04f8fb1e53b12ad0157c1/FLAG115461ce7 [2023-08-31 22:45:16,163 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f4657c6a/d24dcd8e9bf04f8fb1e53b12ad0157c1 [2023-08-31 22:45:16,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:45:16,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:45:16,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:45:16,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:45:16,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:45:16,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e4e352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16, skipping insertion in model container [2023-08-31 22:45:16,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:45:16,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:45:16,457 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/28_buggy_simple_loop1_vf.i[30287,30300] [2023-08-31 22:45:16,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:45:16,475 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:45:16,526 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/28_buggy_simple_loop1_vf.i[30287,30300] [2023-08-31 22:45:16,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:45:16,570 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:45:16,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16 WrapperNode [2023-08-31 22:45:16,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:45:16,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:45:16,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:45:16,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:45:16,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,637 INFO L138 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-08-31 22:45:16,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:45:16,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:45:16,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:45:16,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:45:16,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:45:16,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:45:16,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:45:16,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:45:16,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (1/1) ... [2023-08-31 22:45:16,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:45:16,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:45:16,702 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 22:45:16,711 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 22:45:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 22:45:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 22:45:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:45:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:45:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:45:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:45:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:45:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:45:16,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:45:16,735 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 22:45:16,840 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:45:16,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:45:17,055 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:45:17,060 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:45:17,060 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-31 22:45:17,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:45:17 BoogieIcfgContainer [2023-08-31 22:45:17,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:45:17,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:45:17,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:45:17,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:45:17,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:45:16" (1/3) ... [2023-08-31 22:45:17,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4731c715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:45:17, skipping insertion in model container [2023-08-31 22:45:17,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:45:16" (2/3) ... [2023-08-31 22:45:17,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4731c715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:45:17, skipping insertion in model container [2023-08-31 22:45:17,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:45:17" (3/3) ... [2023-08-31 22:45:17,075 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-08-31 22:45:17,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:45:17,089 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-31 22:45:17,089 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:45:17,165 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:17,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 73 transitions, 151 flow [2023-08-31 22:45:17,275 INFO L130 PetriNetUnfolder]: 10/88 cut-off events. [2023-08-31 22:45:17,275 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:45:17,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 88 events. 10/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-08-31 22:45:17,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 73 transitions, 151 flow [2023-08-31 22:45:17,300 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 73 transitions, 151 flow [2023-08-31 22:45:17,304 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:17,324 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 73 transitions, 151 flow [2023-08-31 22:45:17,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 73 transitions, 151 flow [2023-08-31 22:45:17,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 73 transitions, 151 flow [2023-08-31 22:45:17,348 INFO L130 PetriNetUnfolder]: 10/88 cut-off events. [2023-08-31 22:45:17,348 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:45:17,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 88 events. 10/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-08-31 22:45:17,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 1548 [2023-08-31 22:45:19,129 INFO L134 LiptonReduction]: Checked pairs total: 1220 [2023-08-31 22:45:19,129 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-31 22:45:19,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:19,146 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:19,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:19,151 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2023-08-31 22:45:19,152 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:45:19,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:19,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 22:45:19,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:19,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash 960901054, now seen corresponding path program 1 times [2023-08-31 22:45:19,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:19,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468912538] [2023-08-31 22:45:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:19,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:19,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:19,283 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:19,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:19,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:19,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:45:19,288 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:19,295 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:19,296 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:19,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 22:45:19,341 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:19,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 117 transitions, 246 flow [2023-08-31 22:45:19,380 INFO L130 PetriNetUnfolder]: 19/149 cut-off events. [2023-08-31 22:45:19,383 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:45:19,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 149 events. 19/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 344 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-31 22:45:19,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 117 transitions, 246 flow [2023-08-31 22:45:19,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 117 transitions, 246 flow [2023-08-31 22:45:19,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:19,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 117 transitions, 246 flow [2023-08-31 22:45:19,389 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 117 transitions, 246 flow [2023-08-31 22:45:19,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 117 transitions, 246 flow [2023-08-31 22:45:19,416 INFO L130 PetriNetUnfolder]: 19/149 cut-off events. [2023-08-31 22:45:19,416 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:45:19,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 149 events. 19/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 344 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 103. Up to 6 conditions per place. [2023-08-31 22:45:19,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 6880 [2023-08-31 22:45:21,622 INFO L134 LiptonReduction]: Checked pairs total: 5118 [2023-08-31 22:45:21,622 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-31 22:45:21,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:21,625 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:21,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:21,631 INFO L130 PetriNetUnfolder]: 10/44 cut-off events. [2023-08-31 22:45:21,631 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:45:21,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:21,632 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 22:45:21,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:21,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash 159921334, now seen corresponding path program 1 times [2023-08-31 22:45:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771659828] [2023-08-31 22:45:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:21,656 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:21,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:21,675 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:21,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:45:21,676 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:21,676 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:21,677 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:21,677 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 22:45:21,707 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:21,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 161 transitions, 343 flow [2023-08-31 22:45:21,735 INFO L130 PetriNetUnfolder]: 28/210 cut-off events. [2023-08-31 22:45:21,735 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:45:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 210 events. 28/210 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 615 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-31 22:45:21,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 161 transitions, 343 flow [2023-08-31 22:45:21,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 161 transitions, 343 flow [2023-08-31 22:45:21,739 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:21,739 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 161 transitions, 343 flow [2023-08-31 22:45:21,740 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 161 transitions, 343 flow [2023-08-31 22:45:21,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 161 transitions, 343 flow [2023-08-31 22:45:21,763 INFO L130 PetriNetUnfolder]: 28/210 cut-off events. [2023-08-31 22:45:21,763 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:45:21,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 210 events. 28/210 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 615 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-31 22:45:21,773 INFO L119 LiptonReduction]: Number of co-enabled transitions 15996 [2023-08-31 22:45:24,676 INFO L134 LiptonReduction]: Checked pairs total: 11740 [2023-08-31 22:45:24,676 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-31 22:45:24,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:24,678 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:24,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:24,684 INFO L130 PetriNetUnfolder]: 15/63 cut-off events. [2023-08-31 22:45:24,684 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 22:45:24,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:24,694 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 22:45:24,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:24,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -216194262, now seen corresponding path program 1 times [2023-08-31 22:45:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:24,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463881324] [2023-08-31 22:45:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:24,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:24,719 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:24,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:24,740 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:24,740 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:24,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:45:24,741 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:24,741 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:24,741 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:24,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 22:45:24,777 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:24,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 205 transitions, 442 flow [2023-08-31 22:45:24,811 INFO L130 PetriNetUnfolder]: 37/271 cut-off events. [2023-08-31 22:45:24,812 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:45:24,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 271 events. 37/271 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 874 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 218. Up to 10 conditions per place. [2023-08-31 22:45:24,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 205 transitions, 442 flow [2023-08-31 22:45:24,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 205 transitions, 442 flow [2023-08-31 22:45:24,818 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:24,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 205 transitions, 442 flow [2023-08-31 22:45:24,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 205 transitions, 442 flow [2023-08-31 22:45:24,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 205 transitions, 442 flow [2023-08-31 22:45:24,847 INFO L130 PetriNetUnfolder]: 37/271 cut-off events. [2023-08-31 22:45:24,847 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:45:24,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 271 events. 37/271 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 874 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 218. Up to 10 conditions per place. [2023-08-31 22:45:24,863 INFO L119 LiptonReduction]: Number of co-enabled transitions 28896 [2023-08-31 22:45:28,395 INFO L134 LiptonReduction]: Checked pairs total: 21062 [2023-08-31 22:45:28,395 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-08-31 22:45:28,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:28,398 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:28,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:28,404 INFO L130 PetriNetUnfolder]: 20/82 cut-off events. [2023-08-31 22:45:28,405 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 22:45:28,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:28,416 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:28,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:28,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -621278597, now seen corresponding path program 1 times [2023-08-31 22:45:28,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765447920] [2023-08-31 22:45:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:28,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:28,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:28,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:28,471 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:28,472 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:45:28,472 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:28,473 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:28,473 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:28,473 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 22:45:28,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:28,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 249 transitions, 543 flow [2023-08-31 22:45:28,567 INFO L130 PetriNetUnfolder]: 46/332 cut-off events. [2023-08-31 22:45:28,568 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:45:28,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 332 events. 46/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1135 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 285. Up to 12 conditions per place. [2023-08-31 22:45:28,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 249 transitions, 543 flow [2023-08-31 22:45:28,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 249 transitions, 543 flow [2023-08-31 22:45:28,577 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:28,577 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 249 transitions, 543 flow [2023-08-31 22:45:28,578 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 249 transitions, 543 flow [2023-08-31 22:45:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 249 transitions, 543 flow [2023-08-31 22:45:28,617 INFO L130 PetriNetUnfolder]: 46/332 cut-off events. [2023-08-31 22:45:28,617 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:45:28,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 332 events. 46/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1135 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 285. Up to 12 conditions per place. [2023-08-31 22:45:28,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 45580 [2023-08-31 22:45:32,782 INFO L134 LiptonReduction]: Checked pairs total: 33614 [2023-08-31 22:45:32,782 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 22:45:32,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:32,784 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:32,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:32,796 INFO L130 PetriNetUnfolder]: 25/101 cut-off events. [2023-08-31 22:45:32,796 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 22:45:32,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:32,796 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:32,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:32,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2004522664, now seen corresponding path program 1 times [2023-08-31 22:45:32,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315777546] [2023-08-31 22:45:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:32,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:32,868 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:32,869 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:32,869 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:32,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:45:32,869 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:32,870 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:32,870 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:32,870 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 22:45:32,910 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:32,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 293 transitions, 646 flow [2023-08-31 22:45:32,980 INFO L130 PetriNetUnfolder]: 55/393 cut-off events. [2023-08-31 22:45:32,983 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:45:32,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 393 events. 55/393 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1396 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 354. Up to 14 conditions per place. [2023-08-31 22:45:32,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 293 transitions, 646 flow [2023-08-31 22:45:32,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 293 transitions, 646 flow [2023-08-31 22:45:32,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:32,993 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 293 transitions, 646 flow [2023-08-31 22:45:32,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 293 transitions, 646 flow [2023-08-31 22:45:32,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 293 transitions, 646 flow [2023-08-31 22:45:33,041 INFO L130 PetriNetUnfolder]: 55/393 cut-off events. [2023-08-31 22:45:33,041 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:45:33,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 393 events. 55/393 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1396 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 354. Up to 14 conditions per place. [2023-08-31 22:45:33,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 66048 [2023-08-31 22:45:37,625 INFO L134 LiptonReduction]: Checked pairs total: 48012 [2023-08-31 22:45:37,626 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-08-31 22:45:37,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:37,628 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:37,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:37,637 INFO L130 PetriNetUnfolder]: 30/120 cut-off events. [2023-08-31 22:45:37,637 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 22:45:37,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:37,638 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:37,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:37,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1968532760, now seen corresponding path program 1 times [2023-08-31 22:45:37,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:37,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343951897] [2023-08-31 22:45:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:37,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:37,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:37,710 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:37,716 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:37,716 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:45:37,717 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:37,717 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:37,721 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:37,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 22:45:37,757 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 337 transitions, 751 flow [2023-08-31 22:45:37,825 INFO L130 PetriNetUnfolder]: 64/454 cut-off events. [2023-08-31 22:45:37,825 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:45:37,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 454 events. 64/454 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1646 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-31 22:45:37,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 337 transitions, 751 flow [2023-08-31 22:45:37,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 337 transitions, 751 flow [2023-08-31 22:45:37,839 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:37,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 337 transitions, 751 flow [2023-08-31 22:45:37,839 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 337 transitions, 751 flow [2023-08-31 22:45:37,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 337 transitions, 751 flow [2023-08-31 22:45:37,903 INFO L130 PetriNetUnfolder]: 64/454 cut-off events. [2023-08-31 22:45:37,903 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:45:37,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 454 events. 64/454 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1646 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-31 22:45:37,954 INFO L119 LiptonReduction]: Number of co-enabled transitions 90300 [2023-08-31 22:45:43,208 INFO L134 LiptonReduction]: Checked pairs total: 65299 [2023-08-31 22:45:43,209 INFO L136 LiptonReduction]: Total number of compositions: 291 [2023-08-31 22:45:43,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:43,210 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:43,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:43,227 INFO L130 PetriNetUnfolder]: 35/139 cut-off events. [2023-08-31 22:45:43,227 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 22:45:43,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:43,227 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:43,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:43,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -690192119, now seen corresponding path program 1 times [2023-08-31 22:45:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:43,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399138473] [2023-08-31 22:45:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:43,275 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:43,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:43,306 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:43,306 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:43,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:45:43,307 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:43,307 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:43,308 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:43,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 22:45:43,347 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:43,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 381 transitions, 858 flow [2023-08-31 22:45:43,447 INFO L130 PetriNetUnfolder]: 73/515 cut-off events. [2023-08-31 22:45:43,448 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:45:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 515 events. 73/515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1927 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 495. Up to 18 conditions per place. [2023-08-31 22:45:43,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 381 transitions, 858 flow [2023-08-31 22:45:43,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 381 transitions, 858 flow [2023-08-31 22:45:43,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:43,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 381 transitions, 858 flow [2023-08-31 22:45:43,465 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 381 transitions, 858 flow [2023-08-31 22:45:43,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 381 transitions, 858 flow [2023-08-31 22:45:43,553 INFO L130 PetriNetUnfolder]: 73/515 cut-off events. [2023-08-31 22:45:43,554 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:45:43,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 515 events. 73/515 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1927 event pairs, 0 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 495. Up to 18 conditions per place. [2023-08-31 22:45:43,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 118336 [2023-08-31 22:45:49,359 INFO L134 LiptonReduction]: Checked pairs total: 86743 [2023-08-31 22:45:49,359 INFO L136 LiptonReduction]: Total number of compositions: 329 [2023-08-31 22:45:49,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:49,361 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:49,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:49,374 INFO L130 PetriNetUnfolder]: 40/158 cut-off events. [2023-08-31 22:45:49,375 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 22:45:49,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:49,375 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:49,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:49,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:49,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1392029998, now seen corresponding path program 1 times [2023-08-31 22:45:49,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:49,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432227198] [2023-08-31 22:45:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:49,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:49,391 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:49,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:49,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:49,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:45:49,407 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:49,407 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:49,407 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:49,407 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 22:45:49,448 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 425 transitions, 967 flow [2023-08-31 22:45:49,566 INFO L130 PetriNetUnfolder]: 82/576 cut-off events. [2023-08-31 22:45:49,566 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:45:49,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 576 events. 82/576 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2178 event pairs, 0 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 567. Up to 20 conditions per place. [2023-08-31 22:45:49,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 425 transitions, 967 flow [2023-08-31 22:45:49,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 371 places, 425 transitions, 967 flow [2023-08-31 22:45:49,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:49,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 371 places, 425 transitions, 967 flow [2023-08-31 22:45:49,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 371 places, 425 transitions, 967 flow [2023-08-31 22:45:49,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 425 transitions, 967 flow [2023-08-31 22:45:49,681 INFO L130 PetriNetUnfolder]: 82/576 cut-off events. [2023-08-31 22:45:49,681 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:45:49,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 576 events. 82/576 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 2178 event pairs, 0 based on Foata normal form. 0/445 useless extension candidates. Maximal degree in co-relation 567. Up to 20 conditions per place. [2023-08-31 22:45:49,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 150156 [2023-08-31 22:45:56,183 INFO L134 LiptonReduction]: Checked pairs total: 108409 [2023-08-31 22:45:56,184 INFO L136 LiptonReduction]: Total number of compositions: 367 [2023-08-31 22:45:56,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:45:56,186 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:45:56,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:45:56,199 INFO L130 PetriNetUnfolder]: 45/177 cut-off events. [2023-08-31 22:45:56,199 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:45:56,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:45:56,199 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:45:56,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:45:56,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:45:56,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1947650452, now seen corresponding path program 1 times [2023-08-31 22:45:56,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:45:56,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713345567] [2023-08-31 22:45:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:45:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:45:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:56,217 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:45:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:45:56,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:45:56,237 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:45:56,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:45:56,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:45:56,237 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:45:56,240 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:45:56,241 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:45:56,241 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 22:45:56,284 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:45:56,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 469 transitions, 1078 flow [2023-08-31 22:45:56,393 INFO L130 PetriNetUnfolder]: 91/637 cut-off events. [2023-08-31 22:45:56,394 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:45:56,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 637 events. 91/637 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2401 event pairs, 0 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 640. Up to 22 conditions per place. [2023-08-31 22:45:56,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 409 places, 469 transitions, 1078 flow [2023-08-31 22:45:56,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 409 places, 469 transitions, 1078 flow [2023-08-31 22:45:56,412 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:45:56,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 409 places, 469 transitions, 1078 flow [2023-08-31 22:45:56,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 409 places, 469 transitions, 1078 flow [2023-08-31 22:45:56,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 469 transitions, 1078 flow [2023-08-31 22:45:56,531 INFO L130 PetriNetUnfolder]: 91/637 cut-off events. [2023-08-31 22:45:56,531 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:45:56,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 637 events. 91/637 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2401 event pairs, 0 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 640. Up to 22 conditions per place. [2023-08-31 22:45:56,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 185760 [2023-08-31 22:46:03,682 INFO L134 LiptonReduction]: Checked pairs total: 134153 [2023-08-31 22:46:03,683 INFO L136 LiptonReduction]: Total number of compositions: 405 [2023-08-31 22:46:03,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:03,684 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:03,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:03,702 INFO L130 PetriNetUnfolder]: 50/196 cut-off events. [2023-08-31 22:46:03,702 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 22:46:03,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:03,702 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:03,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:03,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash -16056157, now seen corresponding path program 1 times [2023-08-31 22:46:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:03,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854144043] [2023-08-31 22:46:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:03,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:03,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:03,769 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:03,769 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:03,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:46:03,770 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:03,771 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:03,771 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:03,771 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 22:46:03,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:03,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 447 places, 513 transitions, 1191 flow [2023-08-31 22:46:03,980 INFO L130 PetriNetUnfolder]: 100/698 cut-off events. [2023-08-31 22:46:03,981 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:46:03,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 698 events. 100/698 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2678 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 714. Up to 24 conditions per place. [2023-08-31 22:46:03,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 513 transitions, 1191 flow [2023-08-31 22:46:04,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 513 transitions, 1191 flow [2023-08-31 22:46:04,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:04,006 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 447 places, 513 transitions, 1191 flow [2023-08-31 22:46:04,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 447 places, 513 transitions, 1191 flow [2023-08-31 22:46:04,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 447 places, 513 transitions, 1191 flow [2023-08-31 22:46:04,144 INFO L130 PetriNetUnfolder]: 100/698 cut-off events. [2023-08-31 22:46:04,144 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:46:04,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 698 events. 100/698 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2678 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 714. Up to 24 conditions per place. [2023-08-31 22:46:04,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 225148 [2023-08-31 22:46:12,025 INFO L134 LiptonReduction]: Checked pairs total: 162566 [2023-08-31 22:46:12,025 INFO L136 LiptonReduction]: Total number of compositions: 443 [2023-08-31 22:46:12,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:12,026 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:12,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:12,046 INFO L130 PetriNetUnfolder]: 55/215 cut-off events. [2023-08-31 22:46:12,047 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 22:46:12,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:12,047 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:46:12,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:12,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2030443539, now seen corresponding path program 1 times [2023-08-31 22:46:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:12,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694982910] [2023-08-31 22:46:12,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:12,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:12,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:12,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:12,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:12,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:12,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:46:12,087 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:12,088 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:12,088 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:12,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 22:46:12,149 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:12,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 485 places, 557 transitions, 1306 flow [2023-08-31 22:46:12,341 INFO L130 PetriNetUnfolder]: 109/759 cut-off events. [2023-08-31 22:46:12,342 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:46:12,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 759 events. 109/759 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2917 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 789. Up to 26 conditions per place. [2023-08-31 22:46:12,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 485 places, 557 transitions, 1306 flow [2023-08-31 22:46:12,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 485 places, 557 transitions, 1306 flow [2023-08-31 22:46:12,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:12,370 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 485 places, 557 transitions, 1306 flow [2023-08-31 22:46:12,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 485 places, 557 transitions, 1306 flow [2023-08-31 22:46:12,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 485 places, 557 transitions, 1306 flow [2023-08-31 22:46:12,539 INFO L130 PetriNetUnfolder]: 109/759 cut-off events. [2023-08-31 22:46:12,539 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:46:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 759 events. 109/759 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2917 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 789. Up to 26 conditions per place. [2023-08-31 22:46:12,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 268320 [2023-08-31 22:46:20,943 INFO L134 LiptonReduction]: Checked pairs total: 193645 [2023-08-31 22:46:20,943 INFO L136 LiptonReduction]: Total number of compositions: 481 [2023-08-31 22:46:20,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:20,945 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:20,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:20,967 INFO L130 PetriNetUnfolder]: 60/234 cut-off events. [2023-08-31 22:46:20,968 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 22:46:20,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:20,968 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 22:46:20,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:20,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1248360798, now seen corresponding path program 1 times [2023-08-31 22:46:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:20,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520518129] [2023-08-31 22:46:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:20,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:20,988 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:21,007 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:21,008 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:21,008 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:46:21,008 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:21,009 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:21,009 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:21,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 22:46:21,067 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:21,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 523 places, 601 transitions, 1423 flow [2023-08-31 22:46:21,254 INFO L130 PetriNetUnfolder]: 118/820 cut-off events. [2023-08-31 22:46:21,254 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:46:21,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 820 events. 118/820 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3158 event pairs, 0 based on Foata normal form. 0/633 useless extension candidates. Maximal degree in co-relation 865. Up to 28 conditions per place. [2023-08-31 22:46:21,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 523 places, 601 transitions, 1423 flow [2023-08-31 22:46:21,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 523 places, 601 transitions, 1423 flow [2023-08-31 22:46:21,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:21,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 523 places, 601 transitions, 1423 flow [2023-08-31 22:46:21,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 523 places, 601 transitions, 1423 flow [2023-08-31 22:46:21,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 523 places, 601 transitions, 1423 flow [2023-08-31 22:46:21,436 INFO L130 PetriNetUnfolder]: 118/820 cut-off events. [2023-08-31 22:46:21,437 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:46:21,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 820 events. 118/820 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3158 event pairs, 0 based on Foata normal form. 0/633 useless extension candidates. Maximal degree in co-relation 865. Up to 28 conditions per place. [2023-08-31 22:46:21,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 315276 [2023-08-31 22:46:30,727 INFO L134 LiptonReduction]: Checked pairs total: 230282 [2023-08-31 22:46:30,727 INFO L136 LiptonReduction]: Total number of compositions: 519 [2023-08-31 22:46:30,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:30,729 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:30,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:30,752 INFO L130 PetriNetUnfolder]: 65/253 cut-off events. [2023-08-31 22:46:30,752 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 22:46:30,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:30,752 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 22:46:30,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:30,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1011131023, now seen corresponding path program 1 times [2023-08-31 22:46:30,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:30,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835155426] [2023-08-31 22:46:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:30,775 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:30,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:30,795 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:30,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:30,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:46:30,796 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:30,796 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:30,797 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:30,797 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 22:46:30,871 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:30,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 561 places, 645 transitions, 1542 flow [2023-08-31 22:46:31,094 INFO L130 PetriNetUnfolder]: 127/881 cut-off events. [2023-08-31 22:46:31,094 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:46:31,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 881 events. 127/881 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3442 event pairs, 0 based on Foata normal form. 0/680 useless extension candidates. Maximal degree in co-relation 942. Up to 30 conditions per place. [2023-08-31 22:46:31,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 561 places, 645 transitions, 1542 flow [2023-08-31 22:46:31,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 561 places, 645 transitions, 1542 flow [2023-08-31 22:46:31,129 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:31,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 561 places, 645 transitions, 1542 flow [2023-08-31 22:46:31,130 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 561 places, 645 transitions, 1542 flow [2023-08-31 22:46:31,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 561 places, 645 transitions, 1542 flow [2023-08-31 22:46:31,367 INFO L130 PetriNetUnfolder]: 127/881 cut-off events. [2023-08-31 22:46:31,367 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:46:31,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 881 events. 127/881 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3442 event pairs, 0 based on Foata normal form. 0/680 useless extension candidates. Maximal degree in co-relation 942. Up to 30 conditions per place. [2023-08-31 22:46:31,436 INFO L119 LiptonReduction]: Number of co-enabled transitions 366016 [2023-08-31 22:46:41,047 INFO L134 LiptonReduction]: Checked pairs total: 263757 [2023-08-31 22:46:41,047 INFO L136 LiptonReduction]: Total number of compositions: 557 [2023-08-31 22:46:41,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:41,048 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:41,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:41,068 INFO L130 PetriNetUnfolder]: 70/272 cut-off events. [2023-08-31 22:46:41,068 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 22:46:41,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:41,069 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 22:46:41,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:41,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1529690143, now seen corresponding path program 1 times [2023-08-31 22:46:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472040342] [2023-08-31 22:46:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:41,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:41,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:41,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:41,112 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:41,112 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:41,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:46:41,112 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:41,112 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:41,113 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:41,113 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 22:46:41,175 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:41,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 599 places, 689 transitions, 1663 flow [2023-08-31 22:46:41,424 INFO L130 PetriNetUnfolder]: 136/942 cut-off events. [2023-08-31 22:46:41,424 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:46:41,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108 conditions, 942 events. 136/942 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3701 event pairs, 0 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 1020. Up to 32 conditions per place. [2023-08-31 22:46:41,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 599 places, 689 transitions, 1663 flow [2023-08-31 22:46:41,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 599 places, 689 transitions, 1663 flow [2023-08-31 22:46:41,453 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:41,453 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 599 places, 689 transitions, 1663 flow [2023-08-31 22:46:41,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 599 places, 689 transitions, 1663 flow [2023-08-31 22:46:41,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 599 places, 689 transitions, 1663 flow [2023-08-31 22:46:41,640 INFO L130 PetriNetUnfolder]: 136/942 cut-off events. [2023-08-31 22:46:41,640 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:46:41,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108 conditions, 942 events. 136/942 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3701 event pairs, 0 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 1020. Up to 32 conditions per place. [2023-08-31 22:46:41,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 420540 [2023-08-31 22:46:52,225 INFO L134 LiptonReduction]: Checked pairs total: 306865 [2023-08-31 22:46:52,225 INFO L136 LiptonReduction]: Total number of compositions: 595 [2023-08-31 22:46:52,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:46:52,227 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:46:52,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:46:52,249 INFO L130 PetriNetUnfolder]: 75/291 cut-off events. [2023-08-31 22:46:52,249 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 22:46:52,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:46:52,249 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 22:46:52,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:46:52,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:46:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1663102389, now seen corresponding path program 1 times [2023-08-31 22:46:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:46:52,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752132716] [2023-08-31 22:46:52,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:46:52,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:46:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:52,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:46:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:46:52,296 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:46:52,296 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:46:52,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:46:52,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:46:52,297 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:46:52,297 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:46:52,297 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:46:52,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 22:46:52,366 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:46:52,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 637 places, 733 transitions, 1786 flow [2023-08-31 22:46:52,635 INFO L130 PetriNetUnfolder]: 145/1003 cut-off events. [2023-08-31 22:46:52,635 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:46:52,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1003 events. 145/1003 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3938 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 1099. Up to 34 conditions per place. [2023-08-31 22:46:52,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 637 places, 733 transitions, 1786 flow [2023-08-31 22:46:52,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 637 places, 733 transitions, 1786 flow [2023-08-31 22:46:52,679 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:46:52,679 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 637 places, 733 transitions, 1786 flow [2023-08-31 22:46:52,679 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 637 places, 733 transitions, 1786 flow [2023-08-31 22:46:52,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 637 places, 733 transitions, 1786 flow [2023-08-31 22:46:52,902 INFO L130 PetriNetUnfolder]: 145/1003 cut-off events. [2023-08-31 22:46:52,902 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:46:52,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 1003 events. 145/1003 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3938 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 1099. Up to 34 conditions per place. [2023-08-31 22:46:52,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 478848 [2023-08-31 22:47:04,124 INFO L134 LiptonReduction]: Checked pairs total: 345122 [2023-08-31 22:47:04,124 INFO L136 LiptonReduction]: Total number of compositions: 633 [2023-08-31 22:47:04,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:04,126 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:04,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:04,154 INFO L130 PetriNetUnfolder]: 80/310 cut-off events. [2023-08-31 22:47:04,155 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 22:47:04,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:04,155 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 22:47:04,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:04,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash 476300132, now seen corresponding path program 1 times [2023-08-31 22:47:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:04,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764844671] [2023-08-31 22:47:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:04,178 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:04,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:04,205 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:04,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:04,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:47:04,205 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:04,205 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:04,206 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:04,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 22:47:04,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:04,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 675 places, 777 transitions, 1911 flow [2023-08-31 22:47:04,644 INFO L130 PetriNetUnfolder]: 154/1064 cut-off events. [2023-08-31 22:47:04,644 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:47:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 1064 events. 154/1064 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4225 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 1179. Up to 36 conditions per place. [2023-08-31 22:47:04,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 675 places, 777 transitions, 1911 flow [2023-08-31 22:47:04,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 675 places, 777 transitions, 1911 flow [2023-08-31 22:47:04,692 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:04,692 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 675 places, 777 transitions, 1911 flow [2023-08-31 22:47:04,692 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 675 places, 777 transitions, 1911 flow [2023-08-31 22:47:04,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 675 places, 777 transitions, 1911 flow [2023-08-31 22:47:04,925 INFO L130 PetriNetUnfolder]: 154/1064 cut-off events. [2023-08-31 22:47:04,925 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:47:04,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 1064 events. 154/1064 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4225 event pairs, 0 based on Foata normal form. 0/821 useless extension candidates. Maximal degree in co-relation 1179. Up to 36 conditions per place. [2023-08-31 22:47:05,052 INFO L119 LiptonReduction]: Number of co-enabled transitions 540940 [2023-08-31 22:47:17,093 INFO L134 LiptonReduction]: Checked pairs total: 389799 [2023-08-31 22:47:17,093 INFO L136 LiptonReduction]: Total number of compositions: 671 [2023-08-31 22:47:17,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:17,095 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:17,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:17,132 INFO L130 PetriNetUnfolder]: 85/329 cut-off events. [2023-08-31 22:47:17,132 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 22:47:17,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:17,133 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 22:47:17,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:17,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2068718597, now seen corresponding path program 1 times [2023-08-31 22:47:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:17,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406851230] [2023-08-31 22:47:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:17,160 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:17,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:17,191 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:17,191 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:17,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:47:17,192 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:17,192 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:17,192 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:17,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 22:47:17,295 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 821 transitions, 2038 flow [2023-08-31 22:47:17,665 INFO L130 PetriNetUnfolder]: 163/1125 cut-off events. [2023-08-31 22:47:17,665 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:47:17,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 1125 events. 163/1125 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4454 event pairs, 0 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 1260. Up to 38 conditions per place. [2023-08-31 22:47:17,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 713 places, 821 transitions, 2038 flow [2023-08-31 22:47:17,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 713 places, 821 transitions, 2038 flow [2023-08-31 22:47:17,720 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:17,720 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 713 places, 821 transitions, 2038 flow [2023-08-31 22:47:17,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 713 places, 821 transitions, 2038 flow [2023-08-31 22:47:17,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 713 places, 821 transitions, 2038 flow [2023-08-31 22:47:18,039 INFO L130 PetriNetUnfolder]: 163/1125 cut-off events. [2023-08-31 22:47:18,039 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:47:18,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 1125 events. 163/1125 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4454 event pairs, 0 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 1260. Up to 38 conditions per place. [2023-08-31 22:47:18,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 606816 [2023-08-31 22:47:30,683 INFO L134 LiptonReduction]: Checked pairs total: 436944 [2023-08-31 22:47:30,683 INFO L136 LiptonReduction]: Total number of compositions: 709 [2023-08-31 22:47:30,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:30,685 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:30,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:30,715 INFO L130 PetriNetUnfolder]: 90/348 cut-off events. [2023-08-31 22:47:30,715 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 22:47:30,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:30,715 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 22:47:30,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:30,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1699137171, now seen corresponding path program 1 times [2023-08-31 22:47:30,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:30,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407657773] [2023-08-31 22:47:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:30,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:30,742 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:30,773 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:30,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:30,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:47:30,774 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:30,774 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:30,775 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:30,775 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 22:47:30,861 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:30,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 751 places, 865 transitions, 2167 flow [2023-08-31 22:47:31,237 INFO L130 PetriNetUnfolder]: 172/1186 cut-off events. [2023-08-31 22:47:31,238 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:31,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1434 conditions, 1186 events. 172/1186 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4722 event pairs, 0 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 1342. Up to 40 conditions per place. [2023-08-31 22:47:31,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 751 places, 865 transitions, 2167 flow [2023-08-31 22:47:31,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 751 places, 865 transitions, 2167 flow [2023-08-31 22:47:31,296 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:31,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 751 places, 865 transitions, 2167 flow [2023-08-31 22:47:31,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 751 places, 865 transitions, 2167 flow [2023-08-31 22:47:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 751 places, 865 transitions, 2167 flow [2023-08-31 22:47:31,597 INFO L130 PetriNetUnfolder]: 172/1186 cut-off events. [2023-08-31 22:47:31,597 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:31,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1434 conditions, 1186 events. 172/1186 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4722 event pairs, 0 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 1342. Up to 40 conditions per place. [2023-08-31 22:47:31,751 INFO L119 LiptonReduction]: Number of co-enabled transitions 676476 [2023-08-31 22:47:45,057 INFO L134 LiptonReduction]: Checked pairs total: 487009 [2023-08-31 22:47:45,057 INFO L136 LiptonReduction]: Total number of compositions: 747 [2023-08-31 22:47:45,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:47:45,059 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:47:45,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:47:45,092 INFO L130 PetriNetUnfolder]: 95/367 cut-off events. [2023-08-31 22:47:45,092 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 22:47:45,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:47:45,092 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 22:47:45,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:47:45,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:47:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1640117061, now seen corresponding path program 1 times [2023-08-31 22:47:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:47:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985392131] [2023-08-31 22:47:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:47:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:47:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:45,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:47:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:47:45,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:47:45,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:47:45,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:47:45,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:47:45,151 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:47:45,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:47:45,151 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:47:45,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 22:47:45,242 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:47:45,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 789 places, 909 transitions, 2298 flow [2023-08-31 22:47:45,573 INFO L130 PetriNetUnfolder]: 181/1247 cut-off events. [2023-08-31 22:47:45,573 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:47:45,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 1247 events. 181/1247 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4967 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1425. Up to 42 conditions per place. [2023-08-31 22:47:45,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 789 places, 909 transitions, 2298 flow [2023-08-31 22:47:45,641 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 789 places, 909 transitions, 2298 flow [2023-08-31 22:47:45,641 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:47:45,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 789 places, 909 transitions, 2298 flow [2023-08-31 22:47:45,641 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 789 places, 909 transitions, 2298 flow [2023-08-31 22:47:45,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 789 places, 909 transitions, 2298 flow [2023-08-31 22:47:45,972 INFO L130 PetriNetUnfolder]: 181/1247 cut-off events. [2023-08-31 22:47:45,972 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:47:46,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 1247 events. 181/1247 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4967 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1425. Up to 42 conditions per place. [2023-08-31 22:47:46,153 INFO L119 LiptonReduction]: Number of co-enabled transitions 749920 [2023-08-31 22:48:00,144 INFO L134 LiptonReduction]: Checked pairs total: 539520 [2023-08-31 22:48:00,145 INFO L136 LiptonReduction]: Total number of compositions: 785 [2023-08-31 22:48:00,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:00,146 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:00,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:00,182 INFO L130 PetriNetUnfolder]: 100/386 cut-off events. [2023-08-31 22:48:00,182 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 22:48:00,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:00,182 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 22:48:00,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:00,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1205105505, now seen corresponding path program 1 times [2023-08-31 22:48:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:00,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986389680] [2023-08-31 22:48:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:00,209 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:00,241 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:00,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:00,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:48:00,242 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:00,242 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:00,242 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:00,243 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 22:48:00,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:00,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 953 transitions, 2431 flow [2023-08-31 22:48:00,690 INFO L130 PetriNetUnfolder]: 190/1308 cut-off events. [2023-08-31 22:48:00,691 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:48:00,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 1308 events. 190/1308 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5211 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 1509. Up to 44 conditions per place. [2023-08-31 22:48:00,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 827 places, 953 transitions, 2431 flow [2023-08-31 22:48:00,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 827 places, 953 transitions, 2431 flow [2023-08-31 22:48:00,767 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:00,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 827 places, 953 transitions, 2431 flow [2023-08-31 22:48:00,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 827 places, 953 transitions, 2431 flow [2023-08-31 22:48:00,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 827 places, 953 transitions, 2431 flow [2023-08-31 22:48:01,128 INFO L130 PetriNetUnfolder]: 190/1308 cut-off events. [2023-08-31 22:48:01,128 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:48:01,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 1308 events. 190/1308 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5211 event pairs, 0 based on Foata normal form. 0/1009 useless extension candidates. Maximal degree in co-relation 1509. Up to 44 conditions per place. [2023-08-31 22:48:01,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 827148 [2023-08-31 22:48:16,067 INFO L134 LiptonReduction]: Checked pairs total: 565330 [2023-08-31 22:48:16,067 INFO L136 LiptonReduction]: Total number of compositions: 825 [2023-08-31 22:48:16,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:16,068 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:16,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:16,130 INFO L130 PetriNetUnfolder]: 105/405 cut-off events. [2023-08-31 22:48:16,130 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 22:48:16,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:16,130 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 22:48:16,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:16,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash 490871875, now seen corresponding path program 1 times [2023-08-31 22:48:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:16,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315574388] [2023-08-31 22:48:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:16,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:16,156 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:16,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:16,192 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:16,192 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:48:16,193 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:16,193 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:16,193 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:16,193 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 22:48:16,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:16,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 865 places, 997 transitions, 2566 flow [2023-08-31 22:48:16,669 INFO L130 PetriNetUnfolder]: 199/1369 cut-off events. [2023-08-31 22:48:16,669 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:48:16,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 1369 events. 199/1369 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5457 event pairs, 0 based on Foata normal form. 0/1056 useless extension candidates. Maximal degree in co-relation 1594. Up to 46 conditions per place. [2023-08-31 22:48:16,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 865 places, 997 transitions, 2566 flow [2023-08-31 22:48:16,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 865 places, 997 transitions, 2566 flow [2023-08-31 22:48:16,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:16,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 865 places, 997 transitions, 2566 flow [2023-08-31 22:48:16,755 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 865 places, 997 transitions, 2566 flow [2023-08-31 22:48:16,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 865 places, 997 transitions, 2566 flow [2023-08-31 22:48:17,182 INFO L130 PetriNetUnfolder]: 199/1369 cut-off events. [2023-08-31 22:48:17,183 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:48:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 1369 events. 199/1369 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5457 event pairs, 0 based on Foata normal form. 0/1056 useless extension candidates. Maximal degree in co-relation 1594. Up to 46 conditions per place. [2023-08-31 22:48:17,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 908160 [2023-08-31 22:48:32,930 INFO L134 LiptonReduction]: Checked pairs total: 634256 [2023-08-31 22:48:32,931 INFO L136 LiptonReduction]: Total number of compositions: 863 [2023-08-31 22:48:32,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:32,932 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:32,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:32,979 INFO L130 PetriNetUnfolder]: 110/424 cut-off events. [2023-08-31 22:48:32,980 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 22:48:32,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:32,980 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 22:48:32,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:32,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2015208765, now seen corresponding path program 1 times [2023-08-31 22:48:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570618100] [2023-08-31 22:48:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:33,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:33,047 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:33,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:33,048 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:48:33,048 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:33,049 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:33,049 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:33,049 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 22:48:33,161 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:33,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 903 places, 1041 transitions, 2703 flow [2023-08-31 22:48:33,660 INFO L130 PetriNetUnfolder]: 208/1430 cut-off events. [2023-08-31 22:48:33,660 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:48:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 1430 events. 208/1430 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5729 event pairs, 0 based on Foata normal form. 0/1103 useless extension candidates. Maximal degree in co-relation 1680. Up to 48 conditions per place. [2023-08-31 22:48:33,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 903 places, 1041 transitions, 2703 flow [2023-08-31 22:48:33,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 903 places, 1041 transitions, 2703 flow [2023-08-31 22:48:33,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:33,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 903 places, 1041 transitions, 2703 flow [2023-08-31 22:48:33,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 903 places, 1041 transitions, 2703 flow [2023-08-31 22:48:33,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 903 places, 1041 transitions, 2703 flow [2023-08-31 22:48:34,268 INFO L130 PetriNetUnfolder]: 208/1430 cut-off events. [2023-08-31 22:48:34,268 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:48:34,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 1430 events. 208/1430 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5729 event pairs, 0 based on Foata normal form. 0/1103 useless extension candidates. Maximal degree in co-relation 1680. Up to 48 conditions per place. [2023-08-31 22:48:34,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 992956 [2023-08-31 22:48:50,805 INFO L134 LiptonReduction]: Checked pairs total: 678904 [2023-08-31 22:48:50,805 INFO L136 LiptonReduction]: Total number of compositions: 901 [2023-08-31 22:48:50,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:48:50,807 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:48:50,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:48:50,858 INFO L130 PetriNetUnfolder]: 115/443 cut-off events. [2023-08-31 22:48:50,858 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 22:48:50,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:48:50,858 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 22:48:50,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:48:50,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:48:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2146424525, now seen corresponding path program 1 times [2023-08-31 22:48:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:48:50,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406409439] [2023-08-31 22:48:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:48:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:48:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:50,891 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:48:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:48:50,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:48:50,933 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:48:50,933 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:48:50,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:48:50,933 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:48:50,934 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:48:50,934 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:48:50,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 22:48:51,030 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:48:51,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 941 places, 1085 transitions, 2842 flow [2023-08-31 22:48:51,533 INFO L130 PetriNetUnfolder]: 217/1491 cut-off events. [2023-08-31 22:48:51,533 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:48:51,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 1491 events. 217/1491 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5992 event pairs, 0 based on Foata normal form. 0/1150 useless extension candidates. Maximal degree in co-relation 1767. Up to 50 conditions per place. [2023-08-31 22:48:51,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 941 places, 1085 transitions, 2842 flow [2023-08-31 22:48:51,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 941 places, 1085 transitions, 2842 flow [2023-08-31 22:48:51,637 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:48:51,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 941 places, 1085 transitions, 2842 flow [2023-08-31 22:48:51,637 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 941 places, 1085 transitions, 2842 flow [2023-08-31 22:48:51,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 941 places, 1085 transitions, 2842 flow [2023-08-31 22:48:52,132 INFO L130 PetriNetUnfolder]: 217/1491 cut-off events. [2023-08-31 22:48:52,132 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:48:52,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 1491 events. 217/1491 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 5992 event pairs, 0 based on Foata normal form. 0/1150 useless extension candidates. Maximal degree in co-relation 1767. Up to 50 conditions per place. [2023-08-31 22:48:52,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 1081536 [2023-08-31 22:49:09,686 INFO L134 LiptonReduction]: Checked pairs total: 749486 [2023-08-31 22:49:09,686 INFO L136 LiptonReduction]: Total number of compositions: 939 [2023-08-31 22:49:09,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:49:09,688 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:49:09,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:49:09,751 INFO L130 PetriNetUnfolder]: 120/462 cut-off events. [2023-08-31 22:49:09,751 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 22:49:09,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:49:09,751 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 22:49:09,752 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:49:09,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:49:09,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1001801472, now seen corresponding path program 1 times [2023-08-31 22:49:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:49:09,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63769968] [2023-08-31 22:49:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:49:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:49:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:09,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:49:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:09,836 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:49:09,836 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:49:09,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:49:09,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 22:49:09,837 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:49:09,837 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:49:09,837 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:49:09,837 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 22:49:09,956 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:49:09,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 979 places, 1129 transitions, 2983 flow [2023-08-31 22:49:10,532 INFO L130 PetriNetUnfolder]: 226/1552 cut-off events. [2023-08-31 22:49:10,533 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:49:10,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 1552 events. 226/1552 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6227 event pairs, 0 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 1855. Up to 52 conditions per place. [2023-08-31 22:49:10,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 979 places, 1129 transitions, 2983 flow [2023-08-31 22:49:10,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 979 places, 1129 transitions, 2983 flow [2023-08-31 22:49:10,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:49:10,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 979 places, 1129 transitions, 2983 flow [2023-08-31 22:49:10,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 979 places, 1129 transitions, 2983 flow [2023-08-31 22:49:10,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 979 places, 1129 transitions, 2983 flow [2023-08-31 22:49:11,200 INFO L130 PetriNetUnfolder]: 226/1552 cut-off events. [2023-08-31 22:49:11,200 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:49:11,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 1552 events. 226/1552 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 6227 event pairs, 0 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 1855. Up to 52 conditions per place. [2023-08-31 22:49:11,468 INFO L119 LiptonReduction]: Number of co-enabled transitions 1173900 [2023-08-31 22:49:29,168 INFO L134 LiptonReduction]: Checked pairs total: 802842 [2023-08-31 22:49:29,168 INFO L136 LiptonReduction]: Total number of compositions: 977 [2023-08-31 22:49:29,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:49:29,170 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:49:29,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:49:29,223 INFO L130 PetriNetUnfolder]: 125/481 cut-off events. [2023-08-31 22:49:29,223 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 22:49:29,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:49:29,224 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 22:49:29,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:49:29,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:49:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash -26156822, now seen corresponding path program 1 times [2023-08-31 22:49:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:49:29,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251553315] [2023-08-31 22:49:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:49:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:49:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:29,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:49:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:29,312 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:49:29,313 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:49:29,313 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:49:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 22:49:29,313 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:49:29,314 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:49:29,314 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:49:29,314 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 22:49:29,415 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:49:29,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1017 places, 1173 transitions, 3126 flow [2023-08-31 22:49:30,017 INFO L130 PetriNetUnfolder]: 235/1613 cut-off events. [2023-08-31 22:49:30,017 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:49:30,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1613 events. 235/1613 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6490 event pairs, 0 based on Foata normal form. 0/1244 useless extension candidates. Maximal degree in co-relation 1944. Up to 54 conditions per place. [2023-08-31 22:49:30,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 1017 places, 1173 transitions, 3126 flow [2023-08-31 22:49:30,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1017 places, 1173 transitions, 3126 flow [2023-08-31 22:49:30,117 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:49:30,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1017 places, 1173 transitions, 3126 flow [2023-08-31 22:49:30,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1017 places, 1173 transitions, 3126 flow [2023-08-31 22:49:30,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1017 places, 1173 transitions, 3126 flow [2023-08-31 22:49:30,648 INFO L130 PetriNetUnfolder]: 235/1613 cut-off events. [2023-08-31 22:49:30,649 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:49:30,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 1613 events. 235/1613 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6490 event pairs, 0 based on Foata normal form. 0/1244 useless extension candidates. Maximal degree in co-relation 1944. Up to 54 conditions per place. [2023-08-31 22:49:30,990 INFO L119 LiptonReduction]: Number of co-enabled transitions 1270048 [2023-08-31 22:49:49,508 INFO L134 LiptonReduction]: Checked pairs total: 868136 [2023-08-31 22:49:49,508 INFO L136 LiptonReduction]: Total number of compositions: 1015 [2023-08-31 22:49:49,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:49:49,509 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:49:49,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:49:49,567 INFO L130 PetriNetUnfolder]: 130/500 cut-off events. [2023-08-31 22:49:49,567 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 22:49:49,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:49:49,567 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 22:49:49,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:49:49,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:49:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash -842545968, now seen corresponding path program 1 times [2023-08-31 22:49:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:49:49,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69113887] [2023-08-31 22:49:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:49:49,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:49:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:49,600 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:49:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:49:49,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:49:49,646 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:49:49,646 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:49:49,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 22:49:49,646 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:49:49,647 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:49:49,647 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:49:49,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 22:49:49,755 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:49:49,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1055 places, 1217 transitions, 3271 flow [2023-08-31 22:49:50,414 INFO L130 PetriNetUnfolder]: 244/1674 cut-off events. [2023-08-31 22:49:50,414 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 22:49:50,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134 conditions, 1674 events. 244/1674 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6763 event pairs, 0 based on Foata normal form. 0/1291 useless extension candidates. Maximal degree in co-relation 2034. Up to 56 conditions per place. [2023-08-31 22:49:50,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 1055 places, 1217 transitions, 3271 flow [2023-08-31 22:49:50,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1055 places, 1217 transitions, 3271 flow [2023-08-31 22:49:50,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:49:50,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1055 places, 1217 transitions, 3271 flow [2023-08-31 22:49:50,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1055 places, 1217 transitions, 3271 flow [2023-08-31 22:49:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1055 places, 1217 transitions, 3271 flow [2023-08-31 22:49:51,108 INFO L130 PetriNetUnfolder]: 244/1674 cut-off events. [2023-08-31 22:49:51,109 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 22:49:51,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134 conditions, 1674 events. 244/1674 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 6763 event pairs, 0 based on Foata normal form. 0/1291 useless extension candidates. Maximal degree in co-relation 2034. Up to 56 conditions per place. [2023-08-31 22:49:51,559 INFO L119 LiptonReduction]: Number of co-enabled transitions 1369980 [2023-08-31 22:50:10,978 INFO L134 LiptonReduction]: Checked pairs total: 937073 [2023-08-31 22:50:10,978 INFO L136 LiptonReduction]: Total number of compositions: 1053 [2023-08-31 22:50:10,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:50:10,980 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:50:10,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:50:11,042 INFO L130 PetriNetUnfolder]: 135/519 cut-off events. [2023-08-31 22:50:11,042 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 22:50:11,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:50:11,042 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 22:50:11,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:50:11,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:50:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1939751109, now seen corresponding path program 1 times [2023-08-31 22:50:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:50:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079855549] [2023-08-31 22:50:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:50:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:50:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:11,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:50:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:11,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:50:11,136 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:50:11,136 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:50:11,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 22:50:11,136 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:50:11,137 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:50:11,137 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:50:11,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 22:50:11,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:50:11,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1093 places, 1261 transitions, 3418 flow [2023-08-31 22:50:12,028 INFO L130 PetriNetUnfolder]: 253/1735 cut-off events. [2023-08-31 22:50:12,029 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 22:50:12,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2226 conditions, 1735 events. 253/1735 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7080 event pairs, 0 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 2125. Up to 58 conditions per place. [2023-08-31 22:50:12,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 1093 places, 1261 transitions, 3418 flow [2023-08-31 22:50:12,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1093 places, 1261 transitions, 3418 flow [2023-08-31 22:50:12,159 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:50:12,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1093 places, 1261 transitions, 3418 flow [2023-08-31 22:50:12,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1093 places, 1261 transitions, 3418 flow [2023-08-31 22:50:12,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1093 places, 1261 transitions, 3418 flow [2023-08-31 22:50:12,773 INFO L130 PetriNetUnfolder]: 253/1735 cut-off events. [2023-08-31 22:50:12,773 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 22:50:12,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2226 conditions, 1735 events. 253/1735 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7080 event pairs, 0 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 2125. Up to 58 conditions per place. [2023-08-31 22:50:13,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 1473696 [2023-08-31 22:50:33,461 INFO L134 LiptonReduction]: Checked pairs total: 1040947 [2023-08-31 22:50:33,462 INFO L136 LiptonReduction]: Total number of compositions: 1091 [2023-08-31 22:50:33,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:50:33,463 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:50:33,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:50:33,536 INFO L130 PetriNetUnfolder]: 140/538 cut-off events. [2023-08-31 22:50:33,536 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 22:50:33,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:50:33,536 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 22:50:33,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:50:33,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:50:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1994127501, now seen corresponding path program 1 times [2023-08-31 22:50:33,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:50:33,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907228138] [2023-08-31 22:50:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:50:33,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:50:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:33,572 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:50:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:33,625 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:50:33,625 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:50:33,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:50:33,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 22:50:33,626 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:50:33,626 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:50:33,626 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:50:33,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 22:50:33,736 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:50:33,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1131 places, 1305 transitions, 3567 flow [2023-08-31 22:50:34,409 INFO L130 PetriNetUnfolder]: 262/1796 cut-off events. [2023-08-31 22:50:34,410 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 22:50:34,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2319 conditions, 1796 events. 262/1796 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7245 event pairs, 0 based on Foata normal form. 0/1385 useless extension candidates. Maximal degree in co-relation 2217. Up to 60 conditions per place. [2023-08-31 22:50:34,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 1131 places, 1305 transitions, 3567 flow [2023-08-31 22:50:34,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1131 places, 1305 transitions, 3567 flow [2023-08-31 22:50:34,566 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:50:34,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1131 places, 1305 transitions, 3567 flow [2023-08-31 22:50:34,566 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1131 places, 1305 transitions, 3567 flow [2023-08-31 22:50:34,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1131 places, 1305 transitions, 3567 flow [2023-08-31 22:50:35,253 INFO L130 PetriNetUnfolder]: 262/1796 cut-off events. [2023-08-31 22:50:35,253 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 22:50:35,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2319 conditions, 1796 events. 262/1796 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 7245 event pairs, 0 based on Foata normal form. 0/1385 useless extension candidates. Maximal degree in co-relation 2217. Up to 60 conditions per place. [2023-08-31 22:50:35,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 1581196 [2023-08-31 22:50:56,678 INFO L134 LiptonReduction]: Checked pairs total: 1081291 [2023-08-31 22:50:56,678 INFO L136 LiptonReduction]: Total number of compositions: 1129 [2023-08-31 22:50:56,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:50:56,680 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:50:56,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:50:56,749 INFO L130 PetriNetUnfolder]: 145/557 cut-off events. [2023-08-31 22:50:56,749 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 22:50:56,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:50:56,749 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 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, 1] [2023-08-31 22:50:56,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:50:56,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:50:56,750 INFO L85 PathProgramCache]: Analyzing trace with hash -461078660, now seen corresponding path program 1 times [2023-08-31 22:50:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:50:56,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159626358] [2023-08-31 22:50:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:50:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:50:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:56,785 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:50:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:50:56,837 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:50:56,837 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:50:56,838 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:50:56,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 22:50:56,838 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:50:56,838 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:50:56,838 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:50:56,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-31 22:50:56,954 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:50:56,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1169 places, 1349 transitions, 3718 flow [2023-08-31 22:50:57,667 INFO L130 PetriNetUnfolder]: 271/1857 cut-off events. [2023-08-31 22:50:57,668 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 22:50:57,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 1857 events. 271/1857 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7508 event pairs, 0 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 2310. Up to 62 conditions per place. [2023-08-31 22:50:57,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 1169 places, 1349 transitions, 3718 flow [2023-08-31 22:50:57,837 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1169 places, 1349 transitions, 3718 flow [2023-08-31 22:50:57,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:50:57,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1169 places, 1349 transitions, 3718 flow [2023-08-31 22:50:57,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1169 places, 1349 transitions, 3718 flow [2023-08-31 22:50:57,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1169 places, 1349 transitions, 3718 flow [2023-08-31 22:50:58,558 INFO L130 PetriNetUnfolder]: 271/1857 cut-off events. [2023-08-31 22:50:58,558 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 22:50:58,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 1857 events. 271/1857 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7508 event pairs, 0 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 2310. Up to 62 conditions per place. [2023-08-31 22:50:59,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 1692480 [2023-08-31 22:51:21,200 INFO L134 LiptonReduction]: Checked pairs total: 1195236 [2023-08-31 22:51:21,200 INFO L136 LiptonReduction]: Total number of compositions: 1167 [2023-08-31 22:51:21,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:51:21,202 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:51:21,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:51:21,282 INFO L130 PetriNetUnfolder]: 150/576 cut-off events. [2023-08-31 22:51:21,283 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 22:51:21,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:51:21,283 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 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, 1, 1] [2023-08-31 22:51:21,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:51:21,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:51:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1783269277, now seen corresponding path program 1 times [2023-08-31 22:51:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:51:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717905203] [2023-08-31 22:51:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:51:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:51:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:21,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:51:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:21,376 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:51:21,377 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:51:21,377 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:51:21,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 22:51:21,377 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:51:21,378 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:51:21,378 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:51:21,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-31 22:51:21,502 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:51:21,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1207 places, 1393 transitions, 3871 flow [2023-08-31 22:51:22,400 INFO L130 PetriNetUnfolder]: 280/1918 cut-off events. [2023-08-31 22:51:22,400 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 22:51:22,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1918 events. 280/1918 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7778 event pairs, 0 based on Foata normal form. 0/1479 useless extension candidates. Maximal degree in co-relation 2404. Up to 64 conditions per place. [2023-08-31 22:51:22,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 1207 places, 1393 transitions, 3871 flow [2023-08-31 22:51:22,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1207 places, 1393 transitions, 3871 flow [2023-08-31 22:51:22,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:51:22,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1207 places, 1393 transitions, 3871 flow [2023-08-31 22:51:22,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1207 places, 1393 transitions, 3871 flow [2023-08-31 22:51:22,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1207 places, 1393 transitions, 3871 flow [2023-08-31 22:51:23,425 INFO L130 PetriNetUnfolder]: 280/1918 cut-off events. [2023-08-31 22:51:23,426 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 22:51:23,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1918 events. 280/1918 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7778 event pairs, 0 based on Foata normal form. 0/1479 useless extension candidates. Maximal degree in co-relation 2404. Up to 64 conditions per place. [2023-08-31 22:51:23,883 INFO L119 LiptonReduction]: Number of co-enabled transitions 1807548 [2023-08-31 22:51:46,481 INFO L134 LiptonReduction]: Checked pairs total: 1236758 [2023-08-31 22:51:46,481 INFO L136 LiptonReduction]: Total number of compositions: 1205 [2023-08-31 22:51:46,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:51:46,483 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:51:46,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:51:46,562 INFO L130 PetriNetUnfolder]: 155/595 cut-off events. [2023-08-31 22:51:46,562 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 22:51:46,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:51:46,563 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 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, 1, 1, 1] [2023-08-31 22:51:46,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:51:46,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:51:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2141405881, now seen corresponding path program 1 times [2023-08-31 22:51:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:51:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332800008] [2023-08-31 22:51:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:51:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:51:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:46,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:51:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:51:46,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:51:46,687 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:51:46,687 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:51:46,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 22:51:46,688 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:51:46,688 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:51:46,688 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:51:46,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-31 22:51:46,817 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:51:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1245 places, 1437 transitions, 4026 flow [2023-08-31 22:51:47,757 INFO L130 PetriNetUnfolder]: 289/1979 cut-off events. [2023-08-31 22:51:47,757 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 22:51:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1979 events. 289/1979 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8045 event pairs, 0 based on Foata normal form. 0/1526 useless extension candidates. Maximal degree in co-relation 2499. Up to 66 conditions per place. [2023-08-31 22:51:47,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 1245 places, 1437 transitions, 4026 flow [2023-08-31 22:51:47,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1245 places, 1437 transitions, 4026 flow [2023-08-31 22:51:47,959 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:51:47,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1245 places, 1437 transitions, 4026 flow [2023-08-31 22:51:47,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1245 places, 1437 transitions, 4026 flow [2023-08-31 22:51:47,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1245 places, 1437 transitions, 4026 flow [2023-08-31 22:51:48,881 INFO L130 PetriNetUnfolder]: 289/1979 cut-off events. [2023-08-31 22:51:48,881 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 22:51:48,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1979 events. 289/1979 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8045 event pairs, 0 based on Foata normal form. 0/1526 useless extension candidates. Maximal degree in co-relation 2499. Up to 66 conditions per place. [2023-08-31 22:51:49,323 INFO L119 LiptonReduction]: Number of co-enabled transitions 1926400 [2023-08-31 22:52:12,710 INFO L134 LiptonReduction]: Checked pairs total: 1332921 [2023-08-31 22:52:12,711 INFO L136 LiptonReduction]: Total number of compositions: 1243 [2023-08-31 22:52:12,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:52:12,712 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:52:12,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:52:12,840 INFO L130 PetriNetUnfolder]: 160/614 cut-off events. [2023-08-31 22:52:12,840 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 22:52:12,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:52:12,841 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 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, 1, 1, 1, 1] [2023-08-31 22:52:12,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:52:12,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:52:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1557258235, now seen corresponding path program 1 times [2023-08-31 22:52:12,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:52:12,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010344413] [2023-08-31 22:52:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:52:12,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:52:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:52:12,887 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:52:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:52:12,967 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:52:12,967 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:52:12,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:52:12,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 22:52:12,968 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:52:12,968 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:52:12,968 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:52:12,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-31 22:52:13,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:52:13,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1283 places, 1481 transitions, 4183 flow [2023-08-31 22:52:14,036 INFO L130 PetriNetUnfolder]: 298/2040 cut-off events. [2023-08-31 22:52:14,036 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 22:52:14,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 2040 events. 298/2040 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8300 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 2595. Up to 68 conditions per place. [2023-08-31 22:52:14,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 1283 places, 1481 transitions, 4183 flow [2023-08-31 22:52:14,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1283 places, 1481 transitions, 4183 flow [2023-08-31 22:52:14,273 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:52:14,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1283 places, 1481 transitions, 4183 flow [2023-08-31 22:52:14,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1283 places, 1481 transitions, 4183 flow [2023-08-31 22:52:14,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1283 places, 1481 transitions, 4183 flow [2023-08-31 22:52:15,209 INFO L130 PetriNetUnfolder]: 298/2040 cut-off events. [2023-08-31 22:52:15,209 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 22:52:15,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 2040 events. 298/2040 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8300 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 2595. Up to 68 conditions per place. [2023-08-31 22:52:15,732 INFO L119 LiptonReduction]: Number of co-enabled transitions 2049036 [2023-08-31 22:52:40,059 INFO L134 LiptonReduction]: Checked pairs total: 1417240 [2023-08-31 22:52:40,059 INFO L136 LiptonReduction]: Total number of compositions: 1281 [2023-08-31 22:52:40,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:52:40,061 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:52:40,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:52:40,162 INFO L130 PetriNetUnfolder]: 165/633 cut-off events. [2023-08-31 22:52:40,162 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 22:52:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:52:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 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, 1, 1, 1, 1, 1] [2023-08-31 22:52:40,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:52:40,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:52:40,162 INFO L85 PathProgramCache]: Analyzing trace with hash 53644197, now seen corresponding path program 1 times [2023-08-31 22:52:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:52:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721778589] [2023-08-31 22:52:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:52:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:52:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:52:40,207 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:52:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:52:40,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:52:40,278 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:52:40,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:52:40,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 22:52:40,278 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:52:40,279 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:52:40,279 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:52:40,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-31 22:52:40,413 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:52:40,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1321 places, 1525 transitions, 4342 flow [2023-08-31 22:52:41,469 INFO L130 PetriNetUnfolder]: 307/2101 cut-off events. [2023-08-31 22:52:41,469 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 22:52:41,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 2101 events. 307/2101 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8596 event pairs, 0 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 2692. Up to 70 conditions per place. [2023-08-31 22:52:41,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 1321 places, 1525 transitions, 4342 flow [2023-08-31 22:52:41,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1321 places, 1525 transitions, 4342 flow [2023-08-31 22:52:41,644 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:52:41,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1321 places, 1525 transitions, 4342 flow [2023-08-31 22:52:41,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1321 places, 1525 transitions, 4342 flow [2023-08-31 22:52:41,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1321 places, 1525 transitions, 4342 flow [2023-08-31 22:52:42,743 INFO L130 PetriNetUnfolder]: 307/2101 cut-off events. [2023-08-31 22:52:42,743 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 22:52:42,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 2101 events. 307/2101 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8596 event pairs, 0 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 2692. Up to 70 conditions per place. [2023-08-31 22:52:43,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 2175456 [2023-08-31 22:53:08,431 INFO L134 LiptonReduction]: Checked pairs total: 1485560 [2023-08-31 22:53:08,431 INFO L136 LiptonReduction]: Total number of compositions: 1319 [2023-08-31 22:53:08,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:53:08,433 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:53:08,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:53:08,531 INFO L130 PetriNetUnfolder]: 170/652 cut-off events. [2023-08-31 22:53:08,531 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 22:53:08,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:53:08,531 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 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, 1, 1, 1, 1, 1, 1] [2023-08-31 22:53:08,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:53:08,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:53:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1237828880, now seen corresponding path program 1 times [2023-08-31 22:53:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:53:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691262985] [2023-08-31 22:53:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:53:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:53:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:53:08,638 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:53:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:53:08,712 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:53:08,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:53:08,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:53:08,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 22:53:08,713 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:53:08,713 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:53:08,714 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:53:08,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-31 22:53:08,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:53:08,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1359 places, 1569 transitions, 4503 flow [2023-08-31 22:53:10,116 INFO L130 PetriNetUnfolder]: 316/2162 cut-off events. [2023-08-31 22:53:10,116 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 22:53:10,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 2162 events. 316/2162 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8818 event pairs, 0 based on Foata normal form. 0/1667 useless extension candidates. Maximal degree in co-relation 2790. Up to 72 conditions per place. [2023-08-31 22:53:10,283 INFO L82 GeneralOperation]: Start removeDead. Operand has 1359 places, 1569 transitions, 4503 flow [2023-08-31 22:53:10,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1359 places, 1569 transitions, 4503 flow [2023-08-31 22:53:10,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:53:10,340 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1359 places, 1569 transitions, 4503 flow [2023-08-31 22:53:10,340 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1359 places, 1569 transitions, 4503 flow [2023-08-31 22:53:10,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1359 places, 1569 transitions, 4503 flow [2023-08-31 22:53:12,262 INFO L130 PetriNetUnfolder]: 316/2162 cut-off events. [2023-08-31 22:53:12,276 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 22:53:12,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 2162 events. 316/2162 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8818 event pairs, 0 based on Foata normal form. 0/1667 useless extension candidates. Maximal degree in co-relation 2790. Up to 72 conditions per place. [2023-08-31 22:53:13,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 2305660 [2023-08-31 22:53:39,508 INFO L134 LiptonReduction]: Checked pairs total: 1593856 [2023-08-31 22:53:39,508 INFO L136 LiptonReduction]: Total number of compositions: 1357 [2023-08-31 22:53:39,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:53:39,510 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:53:39,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:53:39,610 INFO L130 PetriNetUnfolder]: 175/671 cut-off events. [2023-08-31 22:53:39,610 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 22:53:39,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:53:39,610 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:53:39,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:53:39,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:53:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash 539249417, now seen corresponding path program 1 times [2023-08-31 22:53:39,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:53:39,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919024312] [2023-08-31 22:53:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:53:39,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:53:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:53:39,669 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:53:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:53:39,741 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:53:39,742 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:53:39,742 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:53:39,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 22:53:39,742 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:53:39,743 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:53:39,743 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:53:39,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-31 22:53:39,926 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:53:39,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1397 places, 1613 transitions, 4666 flow [2023-08-31 22:53:41,190 INFO L130 PetriNetUnfolder]: 325/2223 cut-off events. [2023-08-31 22:53:41,190 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 22:53:41,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2998 conditions, 2223 events. 325/2223 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9041 event pairs, 0 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 2889. Up to 74 conditions per place. [2023-08-31 22:53:41,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 1397 places, 1613 transitions, 4666 flow [2023-08-31 22:53:41,590 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1397 places, 1613 transitions, 4666 flow [2023-08-31 22:53:41,591 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:53:41,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1397 places, 1613 transitions, 4666 flow [2023-08-31 22:53:41,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1397 places, 1613 transitions, 4666 flow [2023-08-31 22:53:41,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1397 places, 1613 transitions, 4666 flow [2023-08-31 22:53:42,962 INFO L130 PetriNetUnfolder]: 325/2223 cut-off events. [2023-08-31 22:53:42,962 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 22:53:43,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2998 conditions, 2223 events. 325/2223 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9041 event pairs, 0 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 2889. Up to 74 conditions per place. [2023-08-31 22:53:43,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 2439648 [2023-08-31 22:54:10,772 INFO L134 LiptonReduction]: Checked pairs total: 1667314 [2023-08-31 22:54:10,772 INFO L136 LiptonReduction]: Total number of compositions: 1395 [2023-08-31 22:54:10,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:54:10,774 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:54:10,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:54:10,883 INFO L130 PetriNetUnfolder]: 180/690 cut-off events. [2023-08-31 22:54:10,883 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 22:54:10,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:54:10,884 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:54:10,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:54:10,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:54:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash -718217329, now seen corresponding path program 1 times [2023-08-31 22:54:10,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:54:10,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799791971] [2023-08-31 22:54:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:54:10,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:54:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:54:10,969 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:54:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:54:11,049 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:54:11,049 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:54:11,049 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:54:11,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 22:54:11,050 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:54:11,050 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:54:11,050 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:54:11,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-31 22:54:11,199 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:54:11,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1435 places, 1657 transitions, 4831 flow [2023-08-31 22:54:12,675 INFO L130 PetriNetUnfolder]: 334/2284 cut-off events. [2023-08-31 22:54:12,675 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 22:54:12,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3099 conditions, 2284 events. 334/2284 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9308 event pairs, 0 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 2989. Up to 76 conditions per place. [2023-08-31 22:54:12,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 1435 places, 1657 transitions, 4831 flow [2023-08-31 22:54:12,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1435 places, 1657 transitions, 4831 flow [2023-08-31 22:54:12,899 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:54:12,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1435 places, 1657 transitions, 4831 flow [2023-08-31 22:54:12,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1435 places, 1657 transitions, 4831 flow [2023-08-31 22:54:12,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1435 places, 1657 transitions, 4831 flow [2023-08-31 22:54:14,295 INFO L130 PetriNetUnfolder]: 334/2284 cut-off events. [2023-08-31 22:54:14,295 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 22:54:14,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3099 conditions, 2284 events. 334/2284 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9308 event pairs, 0 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 2989. Up to 76 conditions per place. [2023-08-31 22:54:15,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 2577420 [2023-08-31 22:54:42,749 INFO L134 LiptonReduction]: Checked pairs total: 1784061 [2023-08-31 22:54:42,749 INFO L136 LiptonReduction]: Total number of compositions: 1433 [2023-08-31 22:54:42,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:54:42,750 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:54:42,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:54:42,915 INFO L130 PetriNetUnfolder]: 185/709 cut-off events. [2023-08-31 22:54:42,915 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 22:54:42,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:54:42,915 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:54:42,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:54:42,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:54:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1725772338, now seen corresponding path program 1 times [2023-08-31 22:54:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:54:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447977065] [2023-08-31 22:54:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:54:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:54:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:54:42,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:54:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:54:43,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:54:43,051 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:54:43,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:54:43,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-31 22:54:43,052 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:54:43,052 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:54:43,052 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:54:43,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-08-31 22:54:43,211 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:54:43,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1473 places, 1701 transitions, 4998 flow [2023-08-31 22:54:44,683 INFO L130 PetriNetUnfolder]: 343/2345 cut-off events. [2023-08-31 22:54:44,683 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 22:54:44,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 2345 events. 343/2345 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9580 event pairs, 0 based on Foata normal form. 0/1808 useless extension candidates. Maximal degree in co-relation 3090. Up to 78 conditions per place. [2023-08-31 22:54:44,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 1473 places, 1701 transitions, 4998 flow [2023-08-31 22:54:44,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1473 places, 1701 transitions, 4998 flow [2023-08-31 22:54:44,893 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:54:44,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1473 places, 1701 transitions, 4998 flow [2023-08-31 22:54:44,893 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1473 places, 1701 transitions, 4998 flow [2023-08-31 22:54:44,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1473 places, 1701 transitions, 4998 flow [2023-08-31 22:54:46,388 INFO L130 PetriNetUnfolder]: 343/2345 cut-off events. [2023-08-31 22:54:46,388 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 22:54:46,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 2345 events. 343/2345 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 9580 event pairs, 0 based on Foata normal form. 0/1808 useless extension candidates. Maximal degree in co-relation 3090. Up to 78 conditions per place. [2023-08-31 22:54:47,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 2718976 [2023-08-31 22:55:15,879 INFO L134 LiptonReduction]: Checked pairs total: 1916200 [2023-08-31 22:55:15,880 INFO L136 LiptonReduction]: Total number of compositions: 1471 [2023-08-31 22:55:15,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:55:15,881 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:55:15,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:55:16,004 INFO L130 PetriNetUnfolder]: 190/728 cut-off events. [2023-08-31 22:55:16,004 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 22:55:16,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:55:16,004 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:55:16,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:55:16,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:55:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1061664085, now seen corresponding path program 1 times [2023-08-31 22:55:16,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:55:16,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025024003] [2023-08-31 22:55:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:55:16,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:55:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:55:16,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:55:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:55:16,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:55:16,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:55:16,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:55:16,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-31 22:55:16,153 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:55:16,153 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:55:16,153 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:55:16,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-08-31 22:55:16,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:55:16,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1511 places, 1745 transitions, 5167 flow [2023-08-31 22:55:18,183 INFO L130 PetriNetUnfolder]: 352/2406 cut-off events. [2023-08-31 22:55:18,183 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 22:55:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3304 conditions, 2406 events. 352/2406 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9868 event pairs, 0 based on Foata normal form. 0/1855 useless extension candidates. Maximal degree in co-relation 3192. Up to 80 conditions per place. [2023-08-31 22:55:18,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 1511 places, 1745 transitions, 5167 flow [2023-08-31 22:55:18,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1511 places, 1745 transitions, 5167 flow [2023-08-31 22:55:18,529 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:55:18,529 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1511 places, 1745 transitions, 5167 flow [2023-08-31 22:55:18,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1511 places, 1745 transitions, 5167 flow [2023-08-31 22:55:18,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1511 places, 1745 transitions, 5167 flow [2023-08-31 22:55:20,697 INFO L130 PetriNetUnfolder]: 352/2406 cut-off events. [2023-08-31 22:55:20,697 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 22:55:20,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3304 conditions, 2406 events. 352/2406 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9868 event pairs, 0 based on Foata normal form. 0/1855 useless extension candidates. Maximal degree in co-relation 3192. Up to 80 conditions per place. [2023-08-31 22:55:21,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 2864316 [2023-08-31 22:55:51,179 INFO L134 LiptonReduction]: Checked pairs total: 1956665 [2023-08-31 22:55:51,180 INFO L136 LiptonReduction]: Total number of compositions: 1509 [2023-08-31 22:55:51,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:55:51,182 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:55:51,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:55:51,311 INFO L130 PetriNetUnfolder]: 195/747 cut-off events. [2023-08-31 22:55:51,312 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 22:55:51,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:55:51,312 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:55:51,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:55:51,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:55:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 453979372, now seen corresponding path program 1 times [2023-08-31 22:55:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:55:51,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75744621] [2023-08-31 22:55:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:55:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:55:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:55:51,366 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:55:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:55:51,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:55:51,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:55:51,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:55:51,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-31 22:55:51,457 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:55:51,457 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:55:51,458 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:55:51,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-08-31 22:55:51,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:55:51,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1549 places, 1789 transitions, 5338 flow [2023-08-31 22:55:53,382 INFO L130 PetriNetUnfolder]: 361/2467 cut-off events. [2023-08-31 22:55:53,382 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 22:55:53,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 2467 events. 361/2467 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10081 event pairs, 0 based on Foata normal form. 0/1902 useless extension candidates. Maximal degree in co-relation 3295. Up to 82 conditions per place. [2023-08-31 22:55:53,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 1549 places, 1789 transitions, 5338 flow [2023-08-31 22:55:53,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1549 places, 1789 transitions, 5338 flow [2023-08-31 22:55:53,749 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:55:53,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1549 places, 1789 transitions, 5338 flow [2023-08-31 22:55:53,749 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1549 places, 1789 transitions, 5338 flow [2023-08-31 22:55:53,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1549 places, 1789 transitions, 5338 flow [2023-08-31 22:55:55,309 INFO L130 PetriNetUnfolder]: 361/2467 cut-off events. [2023-08-31 22:55:55,310 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 22:55:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 2467 events. 361/2467 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10081 event pairs, 0 based on Foata normal form. 0/1902 useless extension candidates. Maximal degree in co-relation 3295. Up to 82 conditions per place. [2023-08-31 22:55:56,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 3013440 [2023-08-31 22:56:26,445 INFO L134 LiptonReduction]: Checked pairs total: 2100422 [2023-08-31 22:56:26,445 INFO L136 LiptonReduction]: Total number of compositions: 1547 [2023-08-31 22:56:26,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 22:56:26,447 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@600d1d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:56:26,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 22:56:26,583 INFO L130 PetriNetUnfolder]: 200/766 cut-off events. [2023-08-31 22:56:26,583 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 22:56:26,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:56:26,583 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:56:26,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 22:56:26,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:56:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash -200679802, now seen corresponding path program 1 times [2023-08-31 22:56:26,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:56:26,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974329149] [2023-08-31 22:56:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:56:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:56:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:56:26,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 22:56:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 22:56:26,732 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 22:56:26,733 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 22:56:26,733 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 22:56:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-31 22:56:26,733 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 22:56:26,734 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 22:56:26,734 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 22:56:26,734 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-08-31 22:56:26,867 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 22:56:26,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1587 places, 1833 transitions, 5511 flow [2023-08-31 22:56:28,700 INFO L130 PetriNetUnfolder]: 370/2528 cut-off events. [2023-08-31 22:56:28,700 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 22:56:28,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3513 conditions, 2528 events. 370/2528 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10376 event pairs, 0 based on Foata normal form. 0/1949 useless extension candidates. Maximal degree in co-relation 3399. Up to 84 conditions per place. [2023-08-31 22:56:28,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 1587 places, 1833 transitions, 5511 flow [2023-08-31 22:56:28,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1587 places, 1833 transitions, 5511 flow [2023-08-31 22:56:28,960 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:56:28,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1587 places, 1833 transitions, 5511 flow [2023-08-31 22:56:28,960 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1587 places, 1833 transitions, 5511 flow [2023-08-31 22:56:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1587 places, 1833 transitions, 5511 flow [2023-08-31 22:56:30,682 INFO L130 PetriNetUnfolder]: 370/2528 cut-off events. [2023-08-31 22:56:30,682 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 22:56:30,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3513 conditions, 2528 events. 370/2528 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10376 event pairs, 0 based on Foata normal form. 0/1949 useless extension candidates. Maximal degree in co-relation 3399. Up to 84 conditions per place. [2023-08-31 22:56:31,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 3166348 Killed by 15