./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --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 11:02:31,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:02:31,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:02:31,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:02:31,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:02:31,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:02:31,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:02:31,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:02:31,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:02:31,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:02:31,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:02:31,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:02:31,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:02:31,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:02:31,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:02:31,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:02:31,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:02:31,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:02:31,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:02:31,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:02:31,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:02:31,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:02:31,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:02:31,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:02:31,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:02:31,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:02:31,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:02:31,377 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:02:31,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:02:31,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:02:31,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:02:31,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:02:31,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:02:31,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:02:31,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:02:31,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:02:31,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:02:31,386 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:02:31,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:02:31,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:02:31,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:02:31,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:02:31,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:02:31,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:02:31,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:02:31,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:02:31,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:02:31,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:02:31,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:02:31,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:02:31,434 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:02:31,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:02:31,435 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:02:31,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:02:31,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:02:31,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:02:31,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:02:31,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:02:31,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:02:31,436 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:02:31,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:02:31,436 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:02:31,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:02:31,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:02:31,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:02:31,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:02:31,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:02:31,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:02:31,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:02:31,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:02:31,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:02:31,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:02:31,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:02:31,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:02:31,439 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:02:31,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:02:31,439 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:02:31,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:02:31,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:02:31,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:02:31,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:02:31,745 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:02:31,746 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:02:31,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-09-01 11:02:32,953 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:02:33,178 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:02:33,179 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-09-01 11:02:33,194 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9ab5854/b3448feb06c44dfa9aa80ecca214370f/FLAGc55d503b3 [2023-09-01 11:02:33,205 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9ab5854/b3448feb06c44dfa9aa80ecca214370f [2023-09-01 11:02:33,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:02:33,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:02:33,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:02:33,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:02:33,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:02:33,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35545347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33, skipping insertion in model container [2023-09-01 11:02:33,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:02:33,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:02:33,525 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_41-trylock_racefree.i[30176,30189] [2023-09-01 11:02:33,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:02:33,556 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:02:33,607 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_41-trylock_racefree.i[30176,30189] [2023-09-01 11:02:33,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:02:33,671 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:02:33,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33 WrapperNode [2023-09-01 11:02:33,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:02:33,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:02:33,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:02:33,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:02:33,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,716 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-09-01 11:02:33,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:02:33,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:02:33,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:02:33,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:02:33,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:02:33,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:02:33,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:02:33,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:02:33,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (1/1) ... [2023-09-01 11:02:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:02:33,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:02:33,767 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 11:02:33,787 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 11:02:33,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:02:33,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:02:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:02:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:02:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:02:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:02:33,800 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:02:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:02:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-09-01 11:02:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:02:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:02:33,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:02:33,802 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 11:02:33,917 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:02:33,918 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:02:34,175 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:02:34,180 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:02:34,180 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-09-01 11:02:34,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:02:34 BoogieIcfgContainer [2023-09-01 11:02:34,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:02:34,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:02:34,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:02:34,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:02:34,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:02:33" (1/3) ... [2023-09-01 11:02:34,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5358643f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:02:34, skipping insertion in model container [2023-09-01 11:02:34,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:02:33" (2/3) ... [2023-09-01 11:02:34,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5358643f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:02:34, skipping insertion in model container [2023-09-01 11:02:34,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:02:34" (3/3) ... [2023-09-01 11:02:34,190 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-09-01 11:02:34,196 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:02:34,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:02:34,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 11:02:34,203 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:02:34,266 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:02:34,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-09-01 11:02:34,322 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-09-01 11:02:34,322 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 11:02:34,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-09-01 11:02:34,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-09-01 11:02:34,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-09-01 11:02:34,332 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:34,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-09-01 11:02:34,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-09-01 11:02:34,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-09-01 11:02:34,368 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-09-01 11:02:34,369 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:02:34,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-09-01 11:02:34,371 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-09-01 11:02:36,321 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-09-01 11:02:36,321 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-09-01 11:02:36,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:36,345 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:36,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:36,358 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2023-09-01 11:02:36,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:02:36,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:36,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 11:02:36,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:36,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash -981753351, now seen corresponding path program 1 times [2023-09-01 11:02:36,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:36,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120212877] [2023-09-01 11:02:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:36,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:36,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:36,527 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:36,528 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:36,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:02:36,530 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:36,534 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:36,534 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:36,534 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:02:36,563 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:02:36,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-09-01 11:02:36,598 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-09-01 11:02:36,598 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:02:36,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-09-01 11:02:36,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-09-01 11:02:36,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-09-01 11:02:36,602 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:36,602 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-09-01 11:02:36,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-09-01 11:02:36,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-09-01 11:02:36,621 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-09-01 11:02:36,623 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:02:36,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-09-01 11:02:36,631 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-09-01 11:02:38,383 INFO L134 LiptonReduction]: Checked pairs total: 14688 [2023-09-01 11:02:38,383 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-09-01 11:02:38,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:38,386 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:38,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:38,391 INFO L130 PetriNetUnfolder]: 13/59 cut-off events. [2023-09-01 11:02:38,394 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:02:38,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:38,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 11:02:38,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:38,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1871727149, now seen corresponding path program 1 times [2023-09-01 11:02:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:38,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533817435] [2023-09-01 11:02:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:38,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:38,482 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:38,483 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:38,483 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:38,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 11:02:38,486 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:38,487 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:38,487 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:38,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:02:38,511 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:02:38,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-09-01 11:02:38,563 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-09-01 11:02:38,564 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:02:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-09-01 11:02:38,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-09-01 11:02:38,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-09-01 11:02:38,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:38,576 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-09-01 11:02:38,576 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-09-01 11:02:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-09-01 11:02:38,630 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-09-01 11:02:38,631 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:02:38,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-09-01 11:02:38,642 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-09-01 11:02:39,884 INFO L134 LiptonReduction]: Checked pairs total: 29489 [2023-09-01 11:02:39,887 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-09-01 11:02:39,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:39,889 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:39,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:39,894 INFO L130 PetriNetUnfolder]: 26/101 cut-off events. [2023-09-01 11:02:39,908 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:02:39,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:39,909 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 11:02:39,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:39,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1520084466, now seen corresponding path program 1 times [2023-09-01 11:02:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:39,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972616633] [2023-09-01 11:02:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:39,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:39,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:39,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:39,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 11:02:39,976 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:39,977 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:39,977 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:39,977 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:02:39,993 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:02:39,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-09-01 11:02:40,052 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-09-01 11:02:40,053 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:02:40,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-09-01 11:02:40,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-09-01 11:02:40,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-09-01 11:02:40,059 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:40,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-09-01 11:02:40,059 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-09-01 11:02:40,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-09-01 11:02:40,098 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-09-01 11:02:40,098 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:02:40,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-09-01 11:02:40,111 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-09-01 11:02:41,900 INFO L134 LiptonReduction]: Checked pairs total: 51303 [2023-09-01 11:02:41,900 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-09-01 11:02:41,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:41,902 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:41,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:41,911 INFO L130 PetriNetUnfolder]: 38/145 cut-off events. [2023-09-01 11:02:41,911 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:02:41,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:41,911 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 11:02:41,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:41,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash 732234382, now seen corresponding path program 1 times [2023-09-01 11:02:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729796835] [2023-09-01 11:02:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:41,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:41,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:41,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:41,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:41,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:02:41,955 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:41,956 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:41,956 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:41,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 11:02:41,977 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 11:02:41,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-09-01 11:02:42,049 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-09-01 11:02:42,049 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 11:02:42,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-09-01 11:02:42,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 223 transitions, 506 flow [2023-09-01 11:02:42,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 223 transitions, 506 flow [2023-09-01 11:02:42,101 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:42,101 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 223 transitions, 506 flow [2023-09-01 11:02:42,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 223 transitions, 506 flow [2023-09-01 11:02:42,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-09-01 11:02:42,179 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-09-01 11:02:42,179 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 11:02:42,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-09-01 11:02:42,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 30520 [2023-09-01 11:02:44,292 INFO L134 LiptonReduction]: Checked pairs total: 84639 [2023-09-01 11:02:44,293 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-09-01 11:02:44,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:44,294 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:44,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:44,306 INFO L130 PetriNetUnfolder]: 52/196 cut-off events. [2023-09-01 11:02:44,306 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 11:02:44,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:44,307 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:02:44,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:44,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash 225543043, now seen corresponding path program 1 times [2023-09-01 11:02:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:44,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588489500] [2023-09-01 11:02:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:44,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:44,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:44,369 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:44,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:44,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:02:44,369 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:44,370 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:44,372 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:44,372 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 11:02:44,392 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 11:02:44,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 253 transitions, 584 flow [2023-09-01 11:02:44,560 INFO L130 PetriNetUnfolder]: 277/1447 cut-off events. [2023-09-01 11:02:44,560 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 11:02:44,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 1447 events. 277/1447 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7800 event pairs, 72 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 956. Up to 192 conditions per place. [2023-09-01 11:02:44,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 253 transitions, 584 flow [2023-09-01 11:02:44,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 253 transitions, 584 flow [2023-09-01 11:02:44,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:44,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 253 transitions, 584 flow [2023-09-01 11:02:44,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 253 transitions, 584 flow [2023-09-01 11:02:44,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 253 transitions, 584 flow [2023-09-01 11:02:44,738 INFO L130 PetriNetUnfolder]: 277/1447 cut-off events. [2023-09-01 11:02:44,739 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 11:02:44,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 1447 events. 277/1447 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7800 event pairs, 72 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 956. Up to 192 conditions per place. [2023-09-01 11:02:44,782 INFO L119 LiptonReduction]: Number of co-enabled transitions 41832 [2023-09-01 11:02:46,828 INFO L134 LiptonReduction]: Checked pairs total: 120240 [2023-09-01 11:02:46,829 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-09-01 11:02:46,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:46,830 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:46,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:46,844 INFO L130 PetriNetUnfolder]: 69/257 cut-off events. [2023-09-01 11:02:46,844 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 11:02:46,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:46,844 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:02:46,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:46,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -240060719, now seen corresponding path program 1 times [2023-09-01 11:02:46,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:46,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90470142] [2023-09-01 11:02:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:46,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:46,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:46,896 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:46,896 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:46,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 11:02:46,897 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:46,899 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:46,899 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:46,900 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 11:02:46,922 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 11:02:46,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 283 transitions, 664 flow [2023-09-01 11:02:47,343 INFO L130 PetriNetUnfolder]: 546/2597 cut-off events. [2023-09-01 11:02:47,343 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 11:02:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3095 conditions, 2597 events. 546/2597 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 16944 event pairs, 201 based on Foata normal form. 0/2235 useless extension candidates. Maximal degree in co-relation 1665. Up to 448 conditions per place. [2023-09-01 11:02:47,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 283 transitions, 664 flow [2023-09-01 11:02:47,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 283 transitions, 664 flow [2023-09-01 11:02:47,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:47,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 283 transitions, 664 flow [2023-09-01 11:02:47,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 283 transitions, 664 flow [2023-09-01 11:02:47,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 283 transitions, 664 flow [2023-09-01 11:02:47,747 INFO L130 PetriNetUnfolder]: 546/2597 cut-off events. [2023-09-01 11:02:47,747 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 11:02:47,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3095 conditions, 2597 events. 546/2597 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 16944 event pairs, 201 based on Foata normal form. 0/2235 useless extension candidates. Maximal degree in co-relation 1665. Up to 448 conditions per place. [2023-09-01 11:02:47,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 54880 [2023-09-01 11:02:49,773 INFO L134 LiptonReduction]: Checked pairs total: 158761 [2023-09-01 11:02:49,773 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-09-01 11:02:49,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:49,778 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:49,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:49,796 INFO L130 PetriNetUnfolder]: 84/321 cut-off events. [2023-09-01 11:02:49,797 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 11:02:49,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:49,797 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:02:49,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:49,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1624175329, now seen corresponding path program 1 times [2023-09-01 11:02:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186515735] [2023-09-01 11:02:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:49,826 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:49,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:49,839 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:49,840 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:49,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 11:02:49,840 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:49,840 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:49,840 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:49,840 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 11:02:49,857 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 11:02:49,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 313 transitions, 746 flow [2023-09-01 11:02:50,596 INFO L130 PetriNetUnfolder]: 1135/4899 cut-off events. [2023-09-01 11:02:50,597 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 11:02:50,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5984 conditions, 4899 events. 1135/4899 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 37958 event pairs, 522 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 3079. Up to 1024 conditions per place. [2023-09-01 11:02:50,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 313 transitions, 746 flow [2023-09-01 11:02:50,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 313 transitions, 746 flow [2023-09-01 11:02:50,695 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:50,695 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 313 transitions, 746 flow [2023-09-01 11:02:50,695 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 313 transitions, 746 flow [2023-09-01 11:02:50,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 313 transitions, 746 flow [2023-09-01 11:02:51,467 INFO L130 PetriNetUnfolder]: 1135/4899 cut-off events. [2023-09-01 11:02:51,468 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 11:02:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5984 conditions, 4899 events. 1135/4899 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 37958 event pairs, 522 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 3079. Up to 1024 conditions per place. [2023-09-01 11:02:51,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 69664 [2023-09-01 11:02:53,495 INFO L134 LiptonReduction]: Checked pairs total: 208968 [2023-09-01 11:02:53,496 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-09-01 11:02:53,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:53,502 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:53,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:53,556 INFO L130 PetriNetUnfolder]: 122/439 cut-off events. [2023-09-01 11:02:53,572 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 11:02:53,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:53,573 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:02:53,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:53,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash 117412337, now seen corresponding path program 1 times [2023-09-01 11:02:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322696869] [2023-09-01 11:02:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:53,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:53,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:53,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:53,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:53,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:02:53,611 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:53,612 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:53,612 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:53,612 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 11:02:53,632 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 11:02:53,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 343 transitions, 830 flow [2023-09-01 11:02:55,162 INFO L130 PetriNetUnfolder]: 2428/9569 cut-off events. [2023-09-01 11:02:55,163 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 11:02:55,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11946 conditions, 9569 events. 2428/9569 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 87401 event pairs, 1291 based on Foata normal form. 0/8411 useless extension candidates. Maximal degree in co-relation 5966. Up to 2304 conditions per place. [2023-09-01 11:02:55,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 343 transitions, 830 flow [2023-09-01 11:02:55,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 343 transitions, 830 flow [2023-09-01 11:02:55,322 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:02:55,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 292 places, 343 transitions, 830 flow [2023-09-01 11:02:55,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 292 places, 343 transitions, 830 flow [2023-09-01 11:02:55,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 343 transitions, 830 flow [2023-09-01 11:02:56,859 INFO L130 PetriNetUnfolder]: 2428/9569 cut-off events. [2023-09-01 11:02:56,860 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 11:02:56,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11946 conditions, 9569 events. 2428/9569 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 87401 event pairs, 1291 based on Foata normal form. 0/8411 useless extension candidates. Maximal degree in co-relation 5966. Up to 2304 conditions per place. [2023-09-01 11:02:57,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 86184 [2023-09-01 11:02:58,792 INFO L134 LiptonReduction]: Checked pairs total: 257419 [2023-09-01 11:02:58,792 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-09-01 11:02:58,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:02:58,799 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:02:58,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:02:58,863 INFO L130 PetriNetUnfolder]: 169/586 cut-off events. [2023-09-01 11:02:58,864 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 11:02:58,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:02:58,864 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:02:58,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:02:58,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:02:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 389941388, now seen corresponding path program 1 times [2023-09-01 11:02:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:02:58,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284287357] [2023-09-01 11:02:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:02:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:02:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:58,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:02:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:02:58,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:02:58,931 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:02:58,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:02:58,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:02:58,932 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:02:58,934 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:02:58,934 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:02:58,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 11:02:58,959 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 11:02:58,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 373 transitions, 916 flow [2023-09-01 11:03:02,574 INFO L130 PetriNetUnfolder]: 5257/19103 cut-off events. [2023-09-01 11:03:02,574 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 11:03:02,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24309 conditions, 19103 events. 5257/19103 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 194767 event pairs, 3084 based on Foata normal form. 0/16907 useless extension candidates. Maximal degree in co-relation 11926. Up to 5120 conditions per place. [2023-09-01 11:03:02,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 317 places, 373 transitions, 916 flow [2023-09-01 11:03:02,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 373 transitions, 916 flow [2023-09-01 11:03:02,940 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:03:02,940 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 373 transitions, 916 flow [2023-09-01 11:03:02,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 373 transitions, 916 flow [2023-09-01 11:03:02,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 373 transitions, 916 flow [2023-09-01 11:03:06,997 INFO L130 PetriNetUnfolder]: 5257/19103 cut-off events. [2023-09-01 11:03:06,997 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 11:03:07,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24309 conditions, 19103 events. 5257/19103 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 194767 event pairs, 3084 based on Foata normal form. 0/16907 useless extension candidates. Maximal degree in co-relation 11926. Up to 5120 conditions per place. [2023-09-01 11:03:08,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 104440 [2023-09-01 11:03:10,392 INFO L134 LiptonReduction]: Checked pairs total: 318219 [2023-09-01 11:03:10,392 INFO L136 LiptonReduction]: Total number of compositions: 211 [2023-09-01 11:03:10,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:03:10,394 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:03:10,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:03:10,464 INFO L130 PetriNetUnfolder]: 245/804 cut-off events. [2023-09-01 11:03:10,464 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 11:03:10,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:03:10,464 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:03:10,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:03:10,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:03:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1114350296, now seen corresponding path program 1 times [2023-09-01 11:03:10,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:03:10,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592130363] [2023-09-01 11:03:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:03:10,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:03:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:03:10,491 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:03:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:03:10,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:03:10,505 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:03:10,505 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:03:10,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 11:03:10,506 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:03:10,506 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:03:10,506 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:03:10,506 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 11:03:10,533 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 11:03:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 403 transitions, 1004 flow [2023-09-01 11:03:18,810 INFO L130 PetriNetUnfolder]: 11414/38621 cut-off events. [2023-09-01 11:03:18,811 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 11:03:19,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49985 conditions, 38621 events. 11414/38621 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 440326 event pairs, 7181 based on Foata normal form. 0/34363 useless extension candidates. Maximal degree in co-relation 24288. Up to 11264 conditions per place. [2023-09-01 11:03:19,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 403 transitions, 1004 flow [2023-09-01 11:03:19,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 403 transitions, 1004 flow [2023-09-01 11:03:19,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:03:19,859 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 403 transitions, 1004 flow [2023-09-01 11:03:19,859 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 403 transitions, 1004 flow [2023-09-01 11:03:19,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 403 transitions, 1004 flow [2023-09-01 11:03:27,717 INFO L130 PetriNetUnfolder]: 11414/38621 cut-off events. [2023-09-01 11:03:27,717 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 11:03:28,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49985 conditions, 38621 events. 11414/38621 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 440326 event pairs, 7181 based on Foata normal form. 0/34363 useless extension candidates. Maximal degree in co-relation 24288. Up to 11264 conditions per place. [2023-09-01 11:03:30,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 124432 [2023-09-01 11:03:32,807 INFO L134 LiptonReduction]: Checked pairs total: 372873 [2023-09-01 11:03:32,807 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-09-01 11:03:32,808 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:03:32,808 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:03:32,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:03:32,889 INFO L130 PetriNetUnfolder]: 372/1137 cut-off events. [2023-09-01 11:03:32,889 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 11:03:32,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:03:32,890 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:03:32,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:03:32,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:03:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1721307958, now seen corresponding path program 1 times [2023-09-01 11:03:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:03:32,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430989601] [2023-09-01 11:03:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:03:32,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:03:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:03:32,905 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:03:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:03:32,917 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:03:32,917 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:03:32,918 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:03:32,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 11:03:32,918 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:03:32,918 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:03:32,918 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:03:32,918 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 11:03:32,940 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 11:03:32,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 367 places, 433 transitions, 1094 flow [2023-09-01 11:03:49,962 INFO L130 PetriNetUnfolder]: 24739/78619 cut-off events. [2023-09-01 11:03:49,962 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 11:03:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103310 conditions, 78619 events. 24739/78619 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 976796 event pairs, 16398 based on Foata normal form. 0/70251 useless extension candidates. Maximal degree in co-relation 49964. Up to 24576 conditions per place. [2023-09-01 11:03:51,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 367 places, 433 transitions, 1094 flow [2023-09-01 11:03:52,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 367 places, 433 transitions, 1094 flow [2023-09-01 11:03:52,762 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:03:52,762 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 367 places, 433 transitions, 1094 flow [2023-09-01 11:03:52,762 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 367 places, 433 transitions, 1094 flow [2023-09-01 11:03:52,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 367 places, 433 transitions, 1094 flow [2023-09-01 11:04:09,592 INFO L130 PetriNetUnfolder]: 24739/78619 cut-off events. [2023-09-01 11:04:09,593 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 11:04:11,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103310 conditions, 78619 events. 24739/78619 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 976796 event pairs, 16398 based on Foata normal form. 0/70251 useless extension candidates. Maximal degree in co-relation 49964. Up to 24576 conditions per place. [2023-09-01 11:04:14,789 INFO L119 LiptonReduction]: Number of co-enabled transitions 146160 [2023-09-01 11:04:17,047 INFO L134 LiptonReduction]: Checked pairs total: 454115 [2023-09-01 11:04:17,047 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-09-01 11:04:17,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:04:17,051 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:04:17,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:04:17,224 INFO L130 PetriNetUnfolder]: 573/1630 cut-off events. [2023-09-01 11:04:17,225 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 11:04:17,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:04:17,225 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:04:17,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:04:17,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:04:17,225 INFO L85 PathProgramCache]: Analyzing trace with hash 989857211, now seen corresponding path program 1 times [2023-09-01 11:04:17,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:04:17,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002880321] [2023-09-01 11:04:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:04:17,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:04:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:04:17,257 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:04:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:04:17,271 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:04:17,271 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:04:17,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:04:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:04:17,272 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:04:17,272 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:04:17,272 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:04:17,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 11:04:17,295 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 11:04:17,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 463 transitions, 1186 flow [2023-09-01 11:04:57,537 INFO L130 PetriNetUnfolder]: 53424/160601 cut-off events. [2023-09-01 11:04:57,537 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 11:05:02,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213980 conditions, 160601 events. 53424/160601 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 2165384 event pairs, 36879 based on Foata normal form. 0/144027 useless extension candidates. Maximal degree in co-relation 103289. Up to 53248 conditions per place. [2023-09-01 11:05:02,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 392 places, 463 transitions, 1186 flow [2023-09-01 11:05:05,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 392 places, 463 transitions, 1186 flow [2023-09-01 11:05:05,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:05:05,536 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 392 places, 463 transitions, 1186 flow [2023-09-01 11:05:05,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 392 places, 463 transitions, 1186 flow [2023-09-01 11:05:05,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 463 transitions, 1186 flow [2023-09-01 11:05:44,834 INFO L130 PetriNetUnfolder]: 53424/160601 cut-off events. [2023-09-01 11:05:44,835 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 11:05:50,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213980 conditions, 160601 events. 53424/160601 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 2165384 event pairs, 36879 based on Foata normal form. 0/144027 useless extension candidates. Maximal degree in co-relation 103289. Up to 53248 conditions per place. [2023-09-01 11:06:07,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 169624 [2023-09-01 11:06:10,026 INFO L134 LiptonReduction]: Checked pairs total: 527681 [2023-09-01 11:06:10,027 INFO L136 LiptonReduction]: Total number of compositions: 257 [2023-09-01 11:06:10,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:06:10,039 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f4efc3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:06:10,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:06:10,341 INFO L130 PetriNetUnfolder]: 927/2436 cut-off events. [2023-09-01 11:06:10,341 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 11:06:10,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:06:10,342 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:06:10,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:06:10,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:06:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2076018442, now seen corresponding path program 1 times [2023-09-01 11:06:10,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:06:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386123434] [2023-09-01 11:06:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:06:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:06:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:06:10,410 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:06:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:06:10,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:06:10,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:06:10,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:06:10,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 11:06:10,447 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 11:06:10,447 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:06:10,447 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:06:10,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 11:06:10,474 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 11:06:10,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 417 places, 493 transitions, 1280 flow