./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.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/goblint-regression/28-race_reach_70-funloop_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --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 [2023-09-01 00:47:37,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 00:47:37,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 00:47:37,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 00:47:37,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 00:47:37,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 00:47:37,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 00:47:37,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 00:47:37,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 00:47:37,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 00:47:37,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 00:47:37,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 00:47:37,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 00:47:37,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 00:47:37,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 00:47:37,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 00:47:37,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 00:47:37,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 00:47:37,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 00:47:37,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 00:47:37,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 00:47:37,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 00:47:37,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 00:47:37,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 00:47:37,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 00:47:37,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 00:47:37,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 00:47:37,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 00:47:37,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 00:47:37,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 00:47:37,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 00:47:37,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 00:47:37,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 00:47:37,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 00:47:37,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 00:47:37,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 00:47:37,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 00:47:37,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 00:47:37,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 00:47:37,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 00:47:37,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 00:47:37,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 00:47:37,487 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 00:47:37,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 00:47:37,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 00:47:37,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 00:47:37,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 00:47:37,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 00:47:37,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 00:47:37,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 00:47:37,491 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 00:47:37,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 00:47:37,492 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 00:47:37,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 00:47:37,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 00:47:37,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 00:47:37,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 00:47:37,493 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 00:47:37,493 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 00:47:37,493 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 00:47:37,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 00:47:37,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 00:47:37,494 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 00:47:37,494 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 00:47:37,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 00:47:37,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 00:47:37,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 00:47:37,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:47:37,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 00:47:37,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 00:47:37,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 00:47:37,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 00:47:37,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 00:47:37,496 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 00:47:37,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 00:47:37,496 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 00:47:37,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 00:47:37,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 00:47:37,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 00:47:37,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 00:47:37,817 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 00:47:37,818 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 00:47:37,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-09-01 00:47:39,033 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 00:47:39,312 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 00:47:39,313 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-09-01 00:47:39,330 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7590b2644/ea829439bdd34971ae0644d900f7ab9d/FLAGd2178e93a [2023-09-01 00:47:39,342 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7590b2644/ea829439bdd34971ae0644d900f7ab9d [2023-09-01 00:47:39,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 00:47:39,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 00:47:39,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 00:47:39,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 00:47:39,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 00:47:39,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:47:39" (1/1) ... [2023-09-01 00:47:39,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12790ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:39, skipping insertion in model container [2023-09-01 00:47:39,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:47:39" (1/1) ... [2023-09-01 00:47:39,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 00:47:39,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 00:47:39,797 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-09-01 00:47:39,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:47:39,850 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 00:47:39,913 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-09-01 00:47:39,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 00:47:40,003 INFO L208 MainTranslator]: Completed translation [2023-09-01 00:47:40,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40 WrapperNode [2023-09-01 00:47:40,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 00:47:40,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 00:47:40,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 00:47:40,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 00:47:40,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,075 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-09-01 00:47:40,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 00:47:40,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 00:47:40,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 00:47:40,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 00:47:40,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,132 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 00:47:40,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 00:47:40,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 00:47:40,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 00:47:40,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (1/1) ... [2023-09-01 00:47:40,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 00:47:40,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:47:40,174 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) [2023-09-01 00:47:40,182 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 [2023-09-01 00:47:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 00:47:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 00:47:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 00:47:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 00:47:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 00:47:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 00:47:40,211 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 00:47:40,212 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 00:47:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 00:47:40,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 00:47:40,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 00:47:40,214 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 00:47:40,330 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 00:47:40,331 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 00:47:40,711 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 00:47:40,718 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 00:47:40,721 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-09-01 00:47:40,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:47:40 BoogieIcfgContainer [2023-09-01 00:47:40,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 00:47:40,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 00:47:40,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 00:47:40,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 00:47:40,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:47:39" (1/3) ... [2023-09-01 00:47:40,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b0cd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:47:40, skipping insertion in model container [2023-09-01 00:47:40,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:47:40" (2/3) ... [2023-09-01 00:47:40,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b0cd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:47:40, skipping insertion in model container [2023-09-01 00:47:40,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:47:40" (3/3) ... [2023-09-01 00:47:40,732 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-09-01 00:47:40,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 00:47:40,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-09-01 00:47:40,748 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 00:47:40,856 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 00:47:40,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 220 transitions, 448 flow [2023-09-01 00:47:41,024 INFO L130 PetriNetUnfolder]: 49/318 cut-off events. [2023-09-01 00:47:41,025 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 00:47:41,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 49/318 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1325 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-09-01 00:47:41,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 220 transitions, 448 flow [2023-09-01 00:47:41,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 215 transitions, 435 flow [2023-09-01 00:47:41,048 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:41,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 215 transitions, 435 flow [2023-09-01 00:47:41,063 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 215 transitions, 435 flow [2023-09-01 00:47:41,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 215 transitions, 435 flow [2023-09-01 00:47:41,113 INFO L130 PetriNetUnfolder]: 48/313 cut-off events. [2023-09-01 00:47:41,113 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:47:41,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 313 events. 48/313 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1266 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 182. Up to 8 conditions per place. [2023-09-01 00:47:41,125 INFO L119 LiptonReduction]: Number of co-enabled transitions 16432 [2023-09-01 00:47:44,492 INFO L134 LiptonReduction]: Checked pairs total: 30587 [2023-09-01 00:47:44,492 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-09-01 00:47:44,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:44,511 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;@72449d35, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:44,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:44,518 INFO L130 PetriNetUnfolder]: 11/55 cut-off events. [2023-09-01 00:47:44,518 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:47:44,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:44,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 00:47:44,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:44,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1830792111, now seen corresponding path program 1 times [2023-09-01 00:47:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:44,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172547621] [2023-09-01 00:47:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:44,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:47:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172547621] [2023-09-01 00:47:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172547621] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:47:44,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:47:44,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:47:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835850112] [2023-09-01 00:47:44,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:47:44,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:47:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:47:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:47:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:47:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 411 [2023-09-01 00:47:44,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:44,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:47:44,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 411 [2023-09-01 00:47:44,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:47:45,027 INFO L130 PetriNetUnfolder]: 617/1369 cut-off events. [2023-09-01 00:47:45,027 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:47:45,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2541 conditions, 1369 events. 617/1369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8413 event pairs, 520 based on Foata normal form. 98/1031 useless extension candidates. Maximal degree in co-relation 2465. Up to 1165 conditions per place. [2023-09-01 00:47:45,031 INFO L137 encePairwiseOnDemand]: 379/411 looper letters, 29 selfloop transitions, 2 changer transitions 27/66 dead transitions. [2023-09-01 00:47:45,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 243 flow [2023-09-01 00:47:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:47:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:47:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-09-01 00:47:45,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174371451743714 [2023-09-01 00:47:45,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-09-01 00:47:45,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-09-01 00:47:45,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:47:45,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-09-01 00:47:45,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,071 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 193 flow. Second operand 3 states and 638 transitions. [2023-09-01 00:47:45,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 243 flow [2023-09-01 00:47:45,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:47:45,076 INFO L231 Difference]: Finished difference. Result has 66 places, 39 transitions, 93 flow [2023-09-01 00:47:45,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=66, PETRI_TRANSITIONS=39} [2023-09-01 00:47:45,080 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-09-01 00:47:45,080 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 39 transitions, 93 flow [2023-09-01 00:47:45,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:45,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:45,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 00:47:45,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:45,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1695493148, now seen corresponding path program 1 times [2023-09-01 00:47:45,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:45,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494773586] [2023-09-01 00:47:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:45,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:45,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:47:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494773586] [2023-09-01 00:47:45,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494773586] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:47:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931288689] [2023-09-01 00:47:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:45,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:47:45,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:47:45,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 00:47:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:45,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:47:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:47:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:45,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:47:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:45,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931288689] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:47:45,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:47:45,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:47:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167161292] [2023-09-01 00:47:45,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:47:45,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:47:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:47:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:47:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:47:45,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 411 [2023-09-01 00:47:45,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 39 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 185.57142857142858) internal successors, (1299), 7 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:47:45,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 411 [2023-09-01 00:47:45,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:47:45,547 INFO L130 PetriNetUnfolder]: 113/287 cut-off events. [2023-09-01 00:47:45,548 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 00:47:45,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 287 events. 113/287 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1178 event pairs, 100 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 535. Up to 240 conditions per place. [2023-09-01 00:47:45,549 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 29 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-09-01 00:47:45,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 173 flow [2023-09-01 00:47:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:47:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:47:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1141 transitions. [2023-09-01 00:47:45,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626926196269262 [2023-09-01 00:47:45,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1141 transitions. [2023-09-01 00:47:45,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1141 transitions. [2023-09-01 00:47:45,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:47:45,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1141 transitions. [2023-09-01 00:47:45,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.16666666666666) internal successors, (1141), 6 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,562 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,562 INFO L175 Difference]: Start difference. First operand has 66 places, 39 transitions, 93 flow. Second operand 6 states and 1141 transitions. [2023-09-01 00:47:45,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 173 flow [2023-09-01 00:47:45,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 169 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 00:47:45,564 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 125 flow [2023-09-01 00:47:45,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-09-01 00:47:45,565 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -23 predicate places. [2023-09-01 00:47:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 125 flow [2023-09-01 00:47:45,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 185.57142857142858) internal successors, (1299), 7 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:45,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:45,567 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 00:47:45,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 00:47:45,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:45,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:45,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:45,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1389175057, now seen corresponding path program 2 times [2023-09-01 00:47:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:45,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418918441] [2023-09-01 00:47:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:45,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:45,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:47:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418918441] [2023-09-01 00:47:45,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418918441] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:47:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429223279] [2023-09-01 00:47:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:47:45,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:45,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:47:45,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:47:45,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 00:47:45,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:47:45,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:47:45,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:47:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:47:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:45,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:47:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 00:47:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429223279] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:47:46,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:47:46,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:47:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233407840] [2023-09-01 00:47:46,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:47:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:47:46,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:47:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:47:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:47:46,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 411 [2023-09-01 00:47:46,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:46,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:47:46,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 411 [2023-09-01 00:47:46,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:47:46,217 INFO L130 PetriNetUnfolder]: 113/293 cut-off events. [2023-09-01 00:47:46,218 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 00:47:46,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 293 events. 113/293 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1184 event pairs, 100 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 526. Up to 240 conditions per place. [2023-09-01 00:47:46,219 INFO L137 encePairwiseOnDemand]: 408/411 looper letters, 29 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2023-09-01 00:47:46,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 241 flow [2023-09-01 00:47:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:47:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:47:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2254 transitions. [2023-09-01 00:47:46,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570154095701541 [2023-09-01 00:47:46,226 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2254 transitions. [2023-09-01 00:47:46,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2254 transitions. [2023-09-01 00:47:46,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:47:46,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2254 transitions. [2023-09-01 00:47:46,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.83333333333334) internal successors, (2254), 12 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:46,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:46,244 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:46,244 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 125 flow. Second operand 12 states and 2254 transitions. [2023-09-01 00:47:46,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 241 flow [2023-09-01 00:47:46,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 227 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:47:46,248 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 195 flow [2023-09-01 00:47:46,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=195, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-09-01 00:47:46,249 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-09-01 00:47:46,249 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 195 flow [2023-09-01 00:47:46,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.30769230769232) internal successors, (2409), 13 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:46,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:46,251 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 00:47:46,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 00:47:46,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 00:47:46,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:46,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1336746033, now seen corresponding path program 3 times [2023-09-01 00:47:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:46,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724500460] [2023-09-01 00:47:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:46,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:46,559 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:46,559 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:46,563 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:46,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 00:47:46,565 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:47:46,566 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:46,567 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:46,567 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 00:47:46,600 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 00:47:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 301 transitions, 620 flow [2023-09-01 00:47:46,668 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-09-01 00:47:46,669 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:47:46,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2615 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-09-01 00:47:46,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 301 transitions, 620 flow [2023-09-01 00:47:46,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 301 transitions, 620 flow [2023-09-01 00:47:46,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:46,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 301 transitions, 620 flow [2023-09-01 00:47:46,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 301 transitions, 620 flow [2023-09-01 00:47:46,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 301 transitions, 620 flow [2023-09-01 00:47:46,728 INFO L130 PetriNetUnfolder]: 82/526 cut-off events. [2023-09-01 00:47:46,729 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 00:47:46,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 526 events. 82/526 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2615 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-09-01 00:47:46,757 INFO L119 LiptonReduction]: Number of co-enabled transitions 47084 [2023-09-01 00:47:50,776 INFO L134 LiptonReduction]: Checked pairs total: 96350 [2023-09-01 00:47:50,777 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-09-01 00:47:50,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:47:50,780 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;@72449d35, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:47:50,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:47:50,792 INFO L130 PetriNetUnfolder]: 36/151 cut-off events. [2023-09-01 00:47:50,792 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 00:47:50,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:50,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:47:50,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:50,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -163940300, now seen corresponding path program 1 times [2023-09-01 00:47:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:50,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805751219] [2023-09-01 00:47:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:50,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:47:50,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805751219] [2023-09-01 00:47:50,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805751219] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:47:50,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:47:50,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:47:50,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698025616] [2023-09-01 00:47:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:47:50,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:47:50,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:47:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:47:50,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:47:50,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 567 [2023-09-01 00:47:50,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:50,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:47:50,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 567 [2023-09-01 00:47:50,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:47:54,723 INFO L130 PetriNetUnfolder]: 31460/50386 cut-off events. [2023-09-01 00:47:54,724 INFO L131 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2023-09-01 00:47:54,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95798 conditions, 50386 events. 31460/50386 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 1836. Compared 412054 event pairs, 28000 based on Foata normal form. 3730/36598 useless extension candidates. Maximal degree in co-relation 38606. Up to 45273 conditions per place. [2023-09-01 00:47:54,858 INFO L137 encePairwiseOnDemand]: 524/567 looper letters, 53 selfloop transitions, 2 changer transitions 34/103 dead transitions. [2023-09-01 00:47:54,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 390 flow [2023-09-01 00:47:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:47:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:47:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 877 transitions. [2023-09-01 00:47:54,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155790711346266 [2023-09-01 00:47:54,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 877 transitions. [2023-09-01 00:47:54,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 877 transitions. [2023-09-01 00:47:54,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:47:54,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 877 transitions. [2023-09-01 00:47:54,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 292.3333333333333) internal successors, (877), 3 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:54,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:54,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 567.0) internal successors, (2268), 4 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:54,869 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 302 flow. Second operand 3 states and 877 transitions. [2023-09-01 00:47:54,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 390 flow [2023-09-01 00:47:54,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:47:54,875 INFO L231 Difference]: Finished difference. Result has 101 places, 69 transitions, 160 flow [2023-09-01 00:47:54,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=101, PETRI_TRANSITIONS=69} [2023-09-01 00:47:54,876 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -5 predicate places. [2023-09-01 00:47:54,876 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 69 transitions, 160 flow [2023-09-01 00:47:54,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:54,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:54,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 00:47:54,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 00:47:54,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:54,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash -985534772, now seen corresponding path program 1 times [2023-09-01 00:47:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709374915] [2023-09-01 00:47:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:54,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:47:54,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709374915] [2023-09-01 00:47:54,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709374915] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:47:54,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222228249] [2023-09-01 00:47:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:54,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:47:54,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:47:54,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 00:47:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:47:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:47:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:55,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:47:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:55,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222228249] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:47:55,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:47:55,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:47:55,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651281666] [2023-09-01 00:47:55,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:47:55,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:47:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:47:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:47:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:47:55,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-09-01 00:47:55,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 69 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 251.71428571428572) internal successors, (1762), 7 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:55,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:47:55,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-09-01 00:47:55,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:47:55,804 INFO L130 PetriNetUnfolder]: 5705/9484 cut-off events. [2023-09-01 00:47:55,805 INFO L131 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2023-09-01 00:47:55,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 9484 events. 5705/9484 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 64877 event pairs, 5182 based on Foata normal form. 0/5810 useless extension candidates. Maximal degree in co-relation 18073. Up to 8496 conditions per place. [2023-09-01 00:47:55,843 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 53 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2023-09-01 00:47:55,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 288 flow [2023-09-01 00:47:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:47:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:47:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1561 transitions. [2023-09-01 00:47:55,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588477366255144 [2023-09-01 00:47:55,850 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1561 transitions. [2023-09-01 00:47:55,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1561 transitions. [2023-09-01 00:47:55,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:47:55,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1561 transitions. [2023-09-01 00:47:55,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.1666666666667) internal successors, (1561), 6 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:55,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:55,862 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 567.0) internal successors, (3969), 7 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:55,862 INFO L175 Difference]: Start difference. First operand has 101 places, 69 transitions, 160 flow. Second operand 6 states and 1561 transitions. [2023-09-01 00:47:55,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 288 flow [2023-09-01 00:47:55,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 282 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 00:47:55,865 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 190 flow [2023-09-01 00:47:55,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-09-01 00:47:55,866 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -28 predicate places. [2023-09-01 00:47:55,866 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 190 flow [2023-09-01 00:47:55,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 251.71428571428572) internal successors, (1762), 7 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:55,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:55,867 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:47:55,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 00:47:56,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:56,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:56,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash 934239796, now seen corresponding path program 2 times [2023-09-01 00:47:56,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:56,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645341139] [2023-09-01 00:47:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:47:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:47:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645341139] [2023-09-01 00:47:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645341139] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:47:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518013131] [2023-09-01 00:47:56,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:47:56,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:56,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:47:56,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:47:56,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 00:47:56,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:47:56,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:47:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:47:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:47:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:56,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:47:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 00:47:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518013131] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:47:56,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:47:56,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:47:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524668366] [2023-09-01 00:47:56,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:47:56,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:47:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:47:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:47:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:47:56,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 567 [2023-09-01 00:47:56,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 251.3846153846154) internal successors, (3268), 13 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:56,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:47:56,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 567 [2023-09-01 00:47:56,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:47:56,907 INFO L130 PetriNetUnfolder]: 5705/9490 cut-off events. [2023-09-01 00:47:56,907 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2023-09-01 00:47:56,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18114 conditions, 9490 events. 5705/9490 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 64804 event pairs, 5182 based on Foata normal form. 6/5823 useless extension candidates. Maximal degree in co-relation 18055. Up to 8496 conditions per place. [2023-09-01 00:47:56,944 INFO L137 encePairwiseOnDemand]: 564/567 looper letters, 53 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2023-09-01 00:47:56,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 354 flow [2023-09-01 00:47:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:47:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:47:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3070 transitions. [2023-09-01 00:47:56,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45120517342739563 [2023-09-01 00:47:56,953 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3070 transitions. [2023-09-01 00:47:56,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3070 transitions. [2023-09-01 00:47:56,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:47:56,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3070 transitions. [2023-09-01 00:47:56,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 255.83333333333334) internal successors, (3070), 12 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:56,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:56,973 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 567.0) internal successors, (7371), 13 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:56,973 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 190 flow. Second operand 12 states and 3070 transitions. [2023-09-01 00:47:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 354 flow [2023-09-01 00:47:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 340 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:47:56,976 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 260 flow [2023-09-01 00:47:56,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=567, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=260, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-09-01 00:47:56,977 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -12 predicate places. [2023-09-01 00:47:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 260 flow [2023-09-01 00:47:56,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 251.3846153846154) internal successors, (3268), 13 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:47:56,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:47:56,978 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 00:47:56,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 00:47:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:47:57,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:47:57,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:47:57,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1028843724, now seen corresponding path program 3 times [2023-09-01 00:47:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:47:57,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975774817] [2023-09-01 00:47:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:47:57,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:47:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:57,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:47:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:47:57,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:47:57,230 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:47:57,230 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:47:57,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 00:47:57,231 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:47:57,231 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:47:57,232 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:47:57,232 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 00:47:57,278 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 00:47:57,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 382 transitions, 794 flow [2023-09-01 00:47:57,369 INFO L130 PetriNetUnfolder]: 120/775 cut-off events. [2023-09-01 00:47:57,370 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:47:57,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 775 events. 120/775 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4144 event pairs, 1 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-09-01 00:47:57,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 382 transitions, 794 flow [2023-09-01 00:47:57,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 326 places, 382 transitions, 794 flow [2023-09-01 00:47:57,387 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:47:57,387 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 382 transitions, 794 flow [2023-09-01 00:47:57,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 382 transitions, 794 flow [2023-09-01 00:47:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 382 transitions, 794 flow [2023-09-01 00:47:57,487 INFO L130 PetriNetUnfolder]: 120/775 cut-off events. [2023-09-01 00:47:57,488 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 00:47:57,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 775 events. 120/775 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4144 event pairs, 1 based on Foata normal form. 0/542 useless extension candidates. Maximal degree in co-relation 534. Up to 16 conditions per place. [2023-09-01 00:47:57,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 90060 [2023-09-01 00:48:02,201 INFO L134 LiptonReduction]: Checked pairs total: 193606 [2023-09-01 00:48:02,201 INFO L136 LiptonReduction]: Total number of compositions: 332 [2023-09-01 00:48:02,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:48:02,204 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@72449d35, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:48:02,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:48:02,227 INFO L130 PetriNetUnfolder]: 62/247 cut-off events. [2023-09-01 00:48:02,227 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 00:48:02,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:48:02,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:48:02,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:48:02,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:48:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -639209087, now seen corresponding path program 1 times [2023-09-01 00:48:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:48:02,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444008275] [2023-09-01 00:48:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:48:02,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:48:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:48:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:48:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:48:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444008275] [2023-09-01 00:48:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444008275] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:48:02,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:48:02,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:48:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959023699] [2023-09-01 00:48:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:48:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:48:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:48:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:48:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:48:02,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 714 [2023-09-01 00:48:02,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:48:02,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:48:02,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 714 [2023-09-01 00:48:02,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:49:42,796 INFO L130 PetriNetUnfolder]: 1037103/1456331 cut-off events. [2023-09-01 00:49:42,797 INFO L131 PetriNetUnfolder]: For 7419/7419 co-relation queries the response was YES. [2023-09-01 00:49:46,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2803820 conditions, 1456331 events. 1037103/1456331 cut-off events. For 7419/7419 co-relation queries the response was YES. Maximal size of possible extension queue 39753. Compared 13383354 event pairs, 944694 based on Foata normal form. 113376/1048534 useless extension candidates. Maximal degree in co-relation 377140. Up to 1343511 conditions per place. [2023-09-01 00:49:48,695 INFO L137 encePairwiseOnDemand]: 660/714 looper letters, 76 selfloop transitions, 2 changer transitions 35/133 dead transitions. [2023-09-01 00:49:48,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 133 transitions, 510 flow [2023-09-01 00:49:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 00:49:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 00:49:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1110 transitions. [2023-09-01 00:49:48,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2023-09-01 00:49:48,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1110 transitions. [2023-09-01 00:49:48,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1110 transitions. [2023-09-01 00:49:48,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:49:48,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1110 transitions. [2023-09-01 00:49:48,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:49:48,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:49:48,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 714.0) internal successors, (2856), 4 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:49:48,719 INFO L175 Difference]: Start difference. First operand has 137 places, 183 transitions, 396 flow. Second operand 3 states and 1110 transitions. [2023-09-01 00:49:48,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 133 transitions, 510 flow [2023-09-01 00:49:48,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 510 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 00:49:48,732 INFO L231 Difference]: Finished difference. Result has 130 places, 98 transitions, 227 flow [2023-09-01 00:49:48,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=130, PETRI_TRANSITIONS=98} [2023-09-01 00:49:48,734 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -7 predicate places. [2023-09-01 00:49:48,734 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 98 transitions, 227 flow [2023-09-01 00:49:48,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:49:48,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:49:48,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:49:48,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 00:49:48,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:49:48,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:49:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1095688896, now seen corresponding path program 1 times [2023-09-01 00:49:48,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:49:48,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852785841] [2023-09-01 00:49:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:48,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:49:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:49:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:49:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852785841] [2023-09-01 00:49:48,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852785841] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:49:48,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321763881] [2023-09-01 00:49:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:49:48,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:49:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:49:48,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:49:48,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 00:49:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:49:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 00:49:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:49:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:49:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:49:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:49:48,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321763881] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:49:48,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:49:48,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 00:49:48,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461569813] [2023-09-01 00:49:48,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:49:48,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 00:49:48,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:49:48,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 00:49:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 00:49:49,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 714 [2023-09-01 00:49:49,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 98 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 317.85714285714283) internal successors, (2225), 7 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:49:49,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:49:49,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 714 [2023-09-01 00:49:49,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:07,818 INFO L130 PetriNetUnfolder]: 193352/275447 cut-off events. [2023-09-01 00:50:07,819 INFO L131 PetriNetUnfolder]: For 3313/3313 co-relation queries the response was YES. [2023-09-01 00:50:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531229 conditions, 275447 events. 193352/275447 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 8332. Compared 2235680 event pairs, 177601 based on Foata normal form. 0/168697 useless extension candidates. Maximal degree in co-relation 531215. Up to 253377 conditions per place. [2023-09-01 00:50:08,803 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 76 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-09-01 00:50:08,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 401 flow [2023-09-01 00:50:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 00:50:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 00:50:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1980 transitions. [2023-09-01 00:50:08,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2023-09-01 00:50:08,808 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1980 transitions. [2023-09-01 00:50:08,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1980 transitions. [2023-09-01 00:50:08,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:08,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1980 transitions. [2023-09-01 00:50:08,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:08,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:08,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 714.0) internal successors, (4998), 7 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:08,823 INFO L175 Difference]: Start difference. First operand has 130 places, 98 transitions, 227 flow. Second operand 6 states and 1980 transitions. [2023-09-01 00:50:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 401 flow [2023-09-01 00:50:08,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 101 transitions, 391 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 00:50:08,829 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 253 flow [2023-09-01 00:50:08,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=253, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2023-09-01 00:50:08,832 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -30 predicate places. [2023-09-01 00:50:08,832 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 253 flow [2023-09-01 00:50:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 317.85714285714283) internal successors, (2225), 7 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:08,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:08,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:50:08,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 00:50:09,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 00:50:09,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:09,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1458026175, now seen corresponding path program 2 times [2023-09-01 00:50:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:09,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787600443] [2023-09-01 00:50:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:50:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:09,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787600443] [2023-09-01 00:50:09,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787600443] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 00:50:09,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442527909] [2023-09-01 00:50:09,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 00:50:09,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:50:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 00:50:09,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 00:50:09,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 00:50:09,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 00:50:09,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 00:50:09,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 00:50:09,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 00:50:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:50:09,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 00:50:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 00:50:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442527909] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 00:50:09,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 00:50:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 00:50:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658947305] [2023-09-01 00:50:09,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 00:50:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 00:50:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 00:50:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 00:50:09,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 714 [2023-09-01 00:50:09,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 253 flow. Second operand has 13 states, 13 states have (on average 317.46153846153845) internal successors, (4127), 13 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:09,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:09,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 714 [2023-09-01 00:50:09,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 00:50:25,930 INFO L130 PetriNetUnfolder]: 193352/275453 cut-off events. [2023-09-01 00:50:25,930 INFO L131 PetriNetUnfolder]: For 1512/1512 co-relation queries the response was YES. [2023-09-01 00:50:26,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530527 conditions, 275453 events. 193352/275453 cut-off events. For 1512/1512 co-relation queries the response was YES. Maximal size of possible extension queue 8332. Compared 2235735 event pairs, 177601 based on Foata normal form. 6/168710 useless extension candidates. Maximal degree in co-relation 530467. Up to 253377 conditions per place. [2023-09-01 00:50:27,314 INFO L137 encePairwiseOnDemand]: 711/714 looper letters, 76 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2023-09-01 00:50:27,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 107 transitions, 463 flow [2023-09-01 00:50:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 00:50:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 00:50:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3885 transitions. [2023-09-01 00:50:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534313725490196 [2023-09-01 00:50:27,322 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3885 transitions. [2023-09-01 00:50:27,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3885 transitions. [2023-09-01 00:50:27,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 00:50:27,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3885 transitions. [2023-09-01 00:50:27,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 323.75) internal successors, (3885), 12 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:27,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 714.0) internal successors, (9282), 13 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:27,341 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 714.0) internal successors, (9282), 13 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:27,342 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 253 flow. Second operand 12 states and 3885 transitions. [2023-09-01 00:50:27,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 107 transitions, 463 flow [2023-09-01 00:50:27,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 107 transitions, 449 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 00:50:27,346 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 323 flow [2023-09-01 00:50:27,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=714, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=323, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-09-01 00:50:27,347 INFO L281 CegarLoopForPetriNet]: 137 programPoint places, -14 predicate places. [2023-09-01 00:50:27,347 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 323 flow [2023-09-01 00:50:27,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 317.46153846153845) internal successors, (4127), 13 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:27,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:27,349 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 00:50:27,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 00:50:27,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 00:50:27,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:27,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2146470113, now seen corresponding path program 3 times [2023-09-01 00:50:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:27,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109447986] [2023-09-01 00:50:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:27,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:50:27,580 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 00:50:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 00:50:27,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 00:50:27,598 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 00:50:27,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 00:50:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 00:50:27,598 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 00:50:27,599 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 00:50:27,599 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 00:50:27,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 00:50:27,637 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 00:50:27,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 463 transitions, 970 flow [2023-09-01 00:50:27,791 INFO L130 PetriNetUnfolder]: 170/1108 cut-off events. [2023-09-01 00:50:27,791 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:50:27,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 1108 events. 170/1108 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6291 event pairs, 6 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 795. Up to 32 conditions per place. [2023-09-01 00:50:27,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 394 places, 463 transitions, 970 flow [2023-09-01 00:50:27,823 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 394 places, 463 transitions, 970 flow [2023-09-01 00:50:27,824 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 00:50:27,824 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 394 places, 463 transitions, 970 flow [2023-09-01 00:50:27,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 394 places, 463 transitions, 970 flow [2023-09-01 00:50:27,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 394 places, 463 transitions, 970 flow [2023-09-01 00:50:27,971 INFO L130 PetriNetUnfolder]: 170/1108 cut-off events. [2023-09-01 00:50:27,972 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 00:50:27,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 1108 events. 170/1108 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6291 event pairs, 6 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 795. Up to 32 conditions per place. [2023-09-01 00:50:28,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 145992 [2023-09-01 00:50:33,338 INFO L134 LiptonReduction]: Checked pairs total: 314583 [2023-09-01 00:50:33,338 INFO L136 LiptonReduction]: Total number of compositions: 390 [2023-09-01 00:50:33,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 00:50:33,340 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@72449d35, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 00:50:33,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 00:50:33,360 INFO L130 PetriNetUnfolder]: 89/352 cut-off events. [2023-09-01 00:50:33,360 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 00:50:33,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 00:50:33,360 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 00:50:33,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 00:50:33,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 00:50:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash 572908163, now seen corresponding path program 1 times [2023-09-01 00:50:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 00:50:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680821319] [2023-09-01 00:50:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 00:50:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 00:50:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 00:50:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 00:50:33,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 00:50:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680821319] [2023-09-01 00:50:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680821319] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 00:50:33,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 00:50:33,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 00:50:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979888051] [2023-09-01 00:50:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 00:50:33,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 00:50:33,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 00:50:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 00:50:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 00:50:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 383 out of 853 [2023-09-01 00:50:33,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 225 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 385.6666666666667) internal successors, (1157), 3 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 00:50:33,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 00:50:33,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 383 of 853 [2023-09-01 00:50:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand