./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-overflow.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_20-callback_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --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 06:40:28,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 06:40:28,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 06:40:28,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 06:40:28,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 06:40:28,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 06:40:28,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 06:40:28,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 06:40:28,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 06:40:28,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 06:40:28,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 06:40:28,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 06:40:28,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 06:40:28,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 06:40:28,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 06:40:28,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 06:40:29,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 06:40:29,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 06:40:29,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 06:40:29,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 06:40:29,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 06:40:29,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 06:40:29,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 06:40:29,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 06:40:29,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 06:40:29,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 06:40:29,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 06:40:29,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 06:40:29,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 06:40:29,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 06:40:29,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 06:40:29,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 06:40:29,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 06:40:29,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 06:40:29,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 06:40:29,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 06:40:29,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 06:40:29,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 06:40:29,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 06:40:29,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 06:40:29,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 06:40:29,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-09-01 06:40:29,047 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 06:40:29,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 06:40:29,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 06:40:29,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 06:40:29,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 06:40:29,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 06:40:29,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 06:40:29,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 06:40:29,055 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 06:40:29,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 06:40:29,056 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 06:40:29,056 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 06:40:29,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 06:40:29,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 06:40:29,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 06:40:29,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 06:40:29,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 06:40:29,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 06:40:29,058 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-09-01 06:40:29,058 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 06:40:29,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 06:40:29,058 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 06:40:29,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 06:40:29,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 06:40:29,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 06:40:29,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 06:40:29,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:40:29,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 06:40:29,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 06:40:29,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 06:40:29,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 06:40:29,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 06:40:29,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 06:40:29,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 06:40:29,061 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 06:40:29,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 06:40:29,062 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 06:40:29,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 06:40:29,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 06:40:29,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 06:40:29,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 06:40:29,423 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 06:40:29,424 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 06:40:29,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-09-01 06:40:30,590 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 06:40:30,879 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 06:40:30,880 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-09-01 06:40:30,895 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfadb91c9/77aa80ffe4934782beac14721d7fba58/FLAG434324405 [2023-09-01 06:40:30,908 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfadb91c9/77aa80ffe4934782beac14721d7fba58 [2023-09-01 06:40:30,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 06:40:30,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 06:40:30,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 06:40:30,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 06:40:30,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 06:40:30,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:40:30" (1/1) ... [2023-09-01 06:40:30,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@239a3686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:30, skipping insertion in model container [2023-09-01 06:40:30,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 06:40:30" (1/1) ... [2023-09-01 06:40:30,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 06:40:30,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 06:40:31,294 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_20-callback_racefree.i[30212,30225] [2023-09-01 06:40:31,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:40:31,343 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 06:40:31,381 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_20-callback_racefree.i[30212,30225] [2023-09-01 06:40:31,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 06:40:31,454 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 06:40:31,461 INFO L208 MainTranslator]: Completed translation [2023-09-01 06:40:31,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31 WrapperNode [2023-09-01 06:40:31,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 06:40:31,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 06:40:31,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 06:40:31,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 06:40:31,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,530 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 145 [2023-09-01 06:40:31,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 06:40:31,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 06:40:31,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 06:40:31,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 06:40:31,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 06:40:31,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 06:40:31,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 06:40:31,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 06:40:31,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (1/1) ... [2023-09-01 06:40:31,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 06:40:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 06:40:31,638 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 06:40:31,663 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 06:40:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 06:40:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 06:40:31,686 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 06:40:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 06:40:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 06:40:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 06:40:31,687 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 06:40:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 06:40:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 06:40:31,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 06:40:31,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 06:40:31,689 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 06:40:31,873 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 06:40:31,875 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 06:40:32,122 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 06:40:32,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 06:40:32,129 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-09-01 06:40:32,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:40:32 BoogieIcfgContainer [2023-09-01 06:40:32,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 06:40:32,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 06:40:32,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 06:40:32,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 06:40:32,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 06:40:30" (1/3) ... [2023-09-01 06:40:32,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f22363a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:40:32, skipping insertion in model container [2023-09-01 06:40:32,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 06:40:31" (2/3) ... [2023-09-01 06:40:32,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f22363a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 06:40:32, skipping insertion in model container [2023-09-01 06:40:32,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 06:40:32" (3/3) ... [2023-09-01 06:40:32,166 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-09-01 06:40:32,174 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 06:40:32,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 06:40:32,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-09-01 06:40:32,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 06:40:32,250 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 06:40:32,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 156 transitions, 320 flow [2023-09-01 06:40:32,362 INFO L130 PetriNetUnfolder]: 26/238 cut-off events. [2023-09-01 06:40:32,362 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 06:40:32,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 238 events. 26/238 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 690 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-09-01 06:40:32,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 156 transitions, 320 flow [2023-09-01 06:40:32,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 147 transitions, 299 flow [2023-09-01 06:40:32,386 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:32,395 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 147 transitions, 299 flow [2023-09-01 06:40:32,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 147 transitions, 299 flow [2023-09-01 06:40:32,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 147 transitions, 299 flow [2023-09-01 06:40:32,434 INFO L130 PetriNetUnfolder]: 25/229 cut-off events. [2023-09-01 06:40:32,434 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:40:32,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 229 events. 25/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 620 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 117. Up to 6 conditions per place. [2023-09-01 06:40:32,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 3496 [2023-09-01 06:40:35,899 INFO L134 LiptonReduction]: Checked pairs total: 4671 [2023-09-01 06:40:35,899 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-09-01 06:40:35,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:35,916 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:35,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:35,922 INFO L130 PetriNetUnfolder]: 3/27 cut-off events. [2023-09-01 06:40:35,922 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 06:40:35,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:35,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-09-01 06:40:35,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:35,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -421282954, now seen corresponding path program 1 times [2023-09-01 06:40:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:35,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85922284] [2023-09-01 06:40:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:36,039 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:36,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:36,095 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:36,096 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:36,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 06:40:36,099 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:36,104 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:36,105 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:36,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 06:40:36,136 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 06:40:36,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2023-09-01 06:40:36,186 INFO L130 PetriNetUnfolder]: 43/377 cut-off events. [2023-09-01 06:40:36,186 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:40:36,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 377 events. 43/377 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 240. Up to 9 conditions per place. [2023-09-01 06:40:36,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 177 transitions, 372 flow [2023-09-01 06:40:36,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 177 transitions, 372 flow [2023-09-01 06:40:36,192 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:36,192 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 177 transitions, 372 flow [2023-09-01 06:40:36,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 177 transitions, 372 flow [2023-09-01 06:40:36,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 177 transitions, 372 flow [2023-09-01 06:40:36,225 INFO L130 PetriNetUnfolder]: 43/377 cut-off events. [2023-09-01 06:40:36,226 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 06:40:36,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 377 events. 43/377 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1411 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 240. Up to 9 conditions per place. [2023-09-01 06:40:36,236 INFO L119 LiptonReduction]: Number of co-enabled transitions 8436 [2023-09-01 06:40:39,402 INFO L134 LiptonReduction]: Checked pairs total: 13272 [2023-09-01 06:40:39,402 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-09-01 06:40:39,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:39,406 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:39,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:39,413 INFO L130 PetriNetUnfolder]: 22/89 cut-off events. [2023-09-01 06:40:39,413 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 06:40:39,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:39,414 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-09-01 06:40:39,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:39,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash -828605184, now seen corresponding path program 1 times [2023-09-01 06:40:39,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:39,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736326436] [2023-09-01 06:40:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:39,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:39,440 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:39,462 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:39,462 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:39,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:39,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 06:40:39,463 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:39,464 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:39,464 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:39,464 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 06:40:39,480 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 06:40:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 426 flow [2023-09-01 06:40:39,537 INFO L130 PetriNetUnfolder]: 65/555 cut-off events. [2023-09-01 06:40:39,537 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:40:39,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 555 events. 65/555 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2309 event pairs, 1 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 385. Up to 16 conditions per place. [2023-09-01 06:40:39,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 198 transitions, 426 flow [2023-09-01 06:40:39,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 198 transitions, 426 flow [2023-09-01 06:40:39,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:39,544 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 198 transitions, 426 flow [2023-09-01 06:40:39,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 198 transitions, 426 flow [2023-09-01 06:40:39,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 426 flow [2023-09-01 06:40:39,591 INFO L130 PetriNetUnfolder]: 65/555 cut-off events. [2023-09-01 06:40:39,592 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 06:40:39,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 555 events. 65/555 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2309 event pairs, 1 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 385. Up to 16 conditions per place. [2023-09-01 06:40:39,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 13908 [2023-09-01 06:40:42,951 INFO L134 LiptonReduction]: Checked pairs total: 23850 [2023-09-01 06:40:42,952 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-09-01 06:40:42,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:42,957 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:42,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:42,971 INFO L130 PetriNetUnfolder]: 32/134 cut-off events. [2023-09-01 06:40:42,974 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 06:40:42,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:42,974 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-09-01 06:40:42,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:42,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 392236139, now seen corresponding path program 1 times [2023-09-01 06:40:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:42,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985683239] [2023-09-01 06:40:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:42,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:43,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:43,044 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:43,045 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:43,045 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:43,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 06:40:43,045 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:43,046 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:43,046 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:43,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 06:40:43,076 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 06:40:43,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 219 transitions, 482 flow [2023-09-01 06:40:43,174 INFO L130 PetriNetUnfolder]: 99/813 cut-off events. [2023-09-01 06:40:43,174 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:40:43,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 813 events. 99/813 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3723 event pairs, 6 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-09-01 06:40:43,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 219 transitions, 482 flow [2023-09-01 06:40:43,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 219 transitions, 482 flow [2023-09-01 06:40:43,185 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:43,185 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 219 transitions, 482 flow [2023-09-01 06:40:43,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 219 transitions, 482 flow [2023-09-01 06:40:43,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 219 transitions, 482 flow [2023-09-01 06:40:43,285 INFO L130 PetriNetUnfolder]: 99/813 cut-off events. [2023-09-01 06:40:43,285 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 06:40:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 813 events. 99/813 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3723 event pairs, 6 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 575. Up to 32 conditions per place. [2023-09-01 06:40:43,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 20216 [2023-09-01 06:40:46,596 INFO L134 LiptonReduction]: Checked pairs total: 33645 [2023-09-01 06:40:46,597 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 06:40:46,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:46,599 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:46,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:46,634 INFO L130 PetriNetUnfolder]: 49/197 cut-off events. [2023-09-01 06:40:46,634 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 06:40:46,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:46,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-09-01 06:40:46,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:46,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2091192549, now seen corresponding path program 1 times [2023-09-01 06:40:46,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:46,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986336367] [2023-09-01 06:40:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:46,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:46,697 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:46,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:46,746 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:46,746 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:46,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 06:40:46,746 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:46,747 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:46,747 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:46,747 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-09-01 06:40:46,775 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-09-01 06:40:46,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 240 transitions, 540 flow [2023-09-01 06:40:46,934 INFO L130 PetriNetUnfolder]: 161/1235 cut-off events. [2023-09-01 06:40:46,935 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 06:40:46,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 1235 events. 161/1235 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6346 event pairs, 23 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 858. Up to 80 conditions per place. [2023-09-01 06:40:46,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 240 transitions, 540 flow [2023-09-01 06:40:46,954 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 240 transitions, 540 flow [2023-09-01 06:40:46,954 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:46,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 240 transitions, 540 flow [2023-09-01 06:40:46,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 240 transitions, 540 flow [2023-09-01 06:40:46,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 240 transitions, 540 flow [2023-09-01 06:40:47,097 INFO L130 PetriNetUnfolder]: 161/1235 cut-off events. [2023-09-01 06:40:47,098 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-09-01 06:40:47,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 1235 events. 161/1235 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6346 event pairs, 23 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 858. Up to 80 conditions per place. [2023-09-01 06:40:47,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 27360 [2023-09-01 06:40:50,413 INFO L134 LiptonReduction]: Checked pairs total: 48934 [2023-09-01 06:40:50,413 INFO L136 LiptonReduction]: Total number of compositions: 202 [2023-09-01 06:40:50,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:50,415 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:50,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:50,430 INFO L130 PetriNetUnfolder]: 56/246 cut-off events. [2023-09-01 06:40:50,430 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-09-01 06:40:50,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:50,430 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:40:50,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:50,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1825653742, now seen corresponding path program 1 times [2023-09-01 06:40:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:50,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626195100] [2023-09-01 06:40:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:50,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:50,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:50,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:50,504 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:50,505 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 06:40:50,507 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:50,508 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:50,509 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:50,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-09-01 06:40:50,529 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-09-01 06:40:50,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 261 transitions, 600 flow [2023-09-01 06:40:50,797 INFO L130 PetriNetUnfolder]: 287/1993 cut-off events. [2023-09-01 06:40:50,798 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 06:40:50,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 1993 events. 287/1993 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11945 event pairs, 72 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 1334. Up to 192 conditions per place. [2023-09-01 06:40:50,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 261 transitions, 600 flow [2023-09-01 06:40:50,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 261 transitions, 600 flow [2023-09-01 06:40:50,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:50,835 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 261 transitions, 600 flow [2023-09-01 06:40:50,836 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 261 transitions, 600 flow [2023-09-01 06:40:50,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 261 transitions, 600 flow [2023-09-01 06:40:51,083 INFO L130 PetriNetUnfolder]: 287/1993 cut-off events. [2023-09-01 06:40:51,083 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-09-01 06:40:51,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 1993 events. 287/1993 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 11945 event pairs, 72 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 1334. Up to 192 conditions per place. [2023-09-01 06:40:51,192 INFO L119 LiptonReduction]: Number of co-enabled transitions 35340 [2023-09-01 06:40:54,617 INFO L134 LiptonReduction]: Checked pairs total: 61226 [2023-09-01 06:40:54,618 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-09-01 06:40:54,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:54,620 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:54,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:54,641 INFO L130 PetriNetUnfolder]: 79/336 cut-off events. [2023-09-01 06:40:54,641 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-09-01 06:40:54,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:54,641 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:40:54,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:54,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:54,642 INFO L85 PathProgramCache]: Analyzing trace with hash -790081166, now seen corresponding path program 1 times [2023-09-01 06:40:54,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:54,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990018810] [2023-09-01 06:40:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:54,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:54,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:54,708 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:54,709 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:54,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 06:40:54,709 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:54,710 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:54,710 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:54,710 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-09-01 06:40:54,732 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 06:40:54,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 282 transitions, 662 flow [2023-09-01 06:40:55,224 INFO L130 PetriNetUnfolder]: 557/3439 cut-off events. [2023-09-01 06:40:55,225 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 06:40:55,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 3439 events. 557/3439 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 24280 event pairs, 201 based on Foata normal form. 0/2758 useless extension candidates. Maximal degree in co-relation 2211. Up to 448 conditions per place. [2023-09-01 06:40:55,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 282 transitions, 662 flow [2023-09-01 06:40:55,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 282 transitions, 662 flow [2023-09-01 06:40:55,269 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:40:55,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 282 transitions, 662 flow [2023-09-01 06:40:55,269 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 282 transitions, 662 flow [2023-09-01 06:40:55,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 282 transitions, 662 flow [2023-09-01 06:40:55,804 INFO L130 PetriNetUnfolder]: 557/3439 cut-off events. [2023-09-01 06:40:55,804 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-09-01 06:40:55,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3937 conditions, 3439 events. 557/3439 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 24280 event pairs, 201 based on Foata normal form. 0/2758 useless extension candidates. Maximal degree in co-relation 2211. Up to 448 conditions per place. [2023-09-01 06:40:55,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 44156 [2023-09-01 06:40:59,461 INFO L134 LiptonReduction]: Checked pairs total: 80562 [2023-09-01 06:40:59,462 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-09-01 06:40:59,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:40:59,466 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:40:59,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:40:59,500 INFO L130 PetriNetUnfolder]: 101/439 cut-off events. [2023-09-01 06:40:59,501 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-09-01 06:40:59,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:40:59,501 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:40:59,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:40:59,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:40:59,502 INFO L85 PathProgramCache]: Analyzing trace with hash -873482528, now seen corresponding path program 1 times [2023-09-01 06:40:59,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:40:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098840303] [2023-09-01 06:40:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:40:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:40:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:59,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:40:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:40:59,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:40:59,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:40:59,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:40:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 06:40:59,582 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:40:59,582 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:40:59,583 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:40:59,583 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-09-01 06:40:59,609 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-09-01 06:40:59,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 303 transitions, 726 flow [2023-09-01 06:41:00,550 INFO L130 PetriNetUnfolder]: 1147/6293 cut-off events. [2023-09-01 06:41:00,550 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:41:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7378 conditions, 6293 events. 1147/6293 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 52723 event pairs, 522 based on Foata normal form. 0/5078 useless extension candidates. Maximal degree in co-relation 3921. Up to 1024 conditions per place. [2023-09-01 06:41:00,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 303 transitions, 726 flow [2023-09-01 06:41:00,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 303 transitions, 726 flow [2023-09-01 06:41:00,656 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:41:00,656 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 303 transitions, 726 flow [2023-09-01 06:41:00,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 303 transitions, 726 flow [2023-09-01 06:41:00,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 303 transitions, 726 flow [2023-09-01 06:41:01,788 INFO L130 PetriNetUnfolder]: 1147/6293 cut-off events. [2023-09-01 06:41:01,788 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-09-01 06:41:01,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7378 conditions, 6293 events. 1147/6293 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 52723 event pairs, 522 based on Foata normal form. 0/5078 useless extension candidates. Maximal degree in co-relation 3921. Up to 1024 conditions per place. [2023-09-01 06:41:01,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 53808 [2023-09-01 06:41:05,601 INFO L134 LiptonReduction]: Checked pairs total: 94196 [2023-09-01 06:41:05,602 INFO L136 LiptonReduction]: Total number of compositions: 247 [2023-09-01 06:41:05,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:41:05,608 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:41:05,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:41:05,647 INFO L130 PetriNetUnfolder]: 130/572 cut-off events. [2023-09-01 06:41:05,648 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-09-01 06:41:05,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:41:05,648 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:41:05,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:41:05,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:41:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2048049789, now seen corresponding path program 1 times [2023-09-01 06:41:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:41:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590389960] [2023-09-01 06:41:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:41:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:41:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:05,670 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:41:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:05,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:41:05,692 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:41:05,693 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:41:05,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 06:41:05,693 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:41:05,694 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:41:05,694 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:41:05,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-09-01 06:41:05,719 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-09-01 06:41:05,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 324 transitions, 792 flow [2023-09-01 06:41:07,649 INFO L130 PetriNetUnfolder]: 2441/12027 cut-off events. [2023-09-01 06:41:07,650 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 06:41:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14404 conditions, 12027 events. 2441/12027 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 116372 event pairs, 1291 based on Foata normal form. 0/9766 useless extension candidates. Maximal degree in co-relation 7360. Up to 2304 conditions per place. [2023-09-01 06:41:07,753 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 324 transitions, 792 flow [2023-09-01 06:41:07,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 296 places, 324 transitions, 792 flow [2023-09-01 06:41:07,929 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:41:07,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 296 places, 324 transitions, 792 flow [2023-09-01 06:41:07,930 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 296 places, 324 transitions, 792 flow [2023-09-01 06:41:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 324 transitions, 792 flow [2023-09-01 06:41:09,745 INFO L130 PetriNetUnfolder]: 2441/12027 cut-off events. [2023-09-01 06:41:09,745 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-09-01 06:41:09,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14404 conditions, 12027 events. 2441/12027 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 116372 event pairs, 1291 based on Foata normal form. 0/9766 useless extension candidates. Maximal degree in co-relation 7360. Up to 2304 conditions per place. [2023-09-01 06:41:10,213 INFO L119 LiptonReduction]: Number of co-enabled transitions 64296 [2023-09-01 06:41:13,922 INFO L134 LiptonReduction]: Checked pairs total: 117900 [2023-09-01 06:41:13,922 INFO L136 LiptonReduction]: Total number of compositions: 262 [2023-09-01 06:41:13,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:41:13,923 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:41:13,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:41:13,968 INFO L130 PetriNetUnfolder]: 182/778 cut-off events. [2023-09-01 06:41:13,968 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-09-01 06:41:13,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:41:13,968 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:41:13,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:41:13,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:41:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash 900490000, now seen corresponding path program 1 times [2023-09-01 06:41:13,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:41:13,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467043303] [2023-09-01 06:41:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:41:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:41:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:13,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:41:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:14,013 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:41:14,013 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:41:14,013 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:41:14,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 06:41:14,013 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:41:14,016 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:41:14,017 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:41:14,017 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-09-01 06:41:14,042 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 06:41:14,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 345 transitions, 860 flow [2023-09-01 06:41:17,966 INFO L130 PetriNetUnfolder]: 5271/23649 cut-off events. [2023-09-01 06:41:17,966 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 06:41:18,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28855 conditions, 23649 events. 5271/23649 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 260094 event pairs, 3084 based on Foata normal form. 0/19318 useless extension candidates. Maximal degree in co-relation 14384. Up to 5120 conditions per place. [2023-09-01 06:41:18,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 345 transitions, 860 flow [2023-09-01 06:41:18,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 315 places, 345 transitions, 860 flow [2023-09-01 06:41:18,601 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:41:18,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 315 places, 345 transitions, 860 flow [2023-09-01 06:41:18,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 315 places, 345 transitions, 860 flow [2023-09-01 06:41:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 345 transitions, 860 flow [2023-09-01 06:41:23,094 INFO L130 PetriNetUnfolder]: 5271/23649 cut-off events. [2023-09-01 06:41:23,094 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-09-01 06:41:23,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28855 conditions, 23649 events. 5271/23649 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 260094 event pairs, 3084 based on Foata normal form. 0/19318 useless extension candidates. Maximal degree in co-relation 14384. Up to 5120 conditions per place. [2023-09-01 06:41:23,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 75620 [2023-09-01 06:41:27,607 INFO L134 LiptonReduction]: Checked pairs total: 139280 [2023-09-01 06:41:27,608 INFO L136 LiptonReduction]: Total number of compositions: 280 [2023-09-01 06:41:27,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:41:27,609 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:41:27,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:41:27,705 INFO L130 PetriNetUnfolder]: 254/1059 cut-off events. [2023-09-01 06:41:27,705 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-09-01 06:41:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:41:27,706 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:41:27,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:41:27,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:41:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1159272503, now seen corresponding path program 1 times [2023-09-01 06:41:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:41:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295173017] [2023-09-01 06:41:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:41:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:41:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:27,734 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:41:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:27,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:41:27,755 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:41:27,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:41:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 06:41:27,756 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:41:27,756 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:41:27,756 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:41:27,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-09-01 06:41:27,784 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-09-01 06:41:27,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 366 transitions, 930 flow [2023-09-01 06:41:36,749 INFO L130 PetriNetUnfolder]: 11429/47303 cut-off events. [2023-09-01 06:41:36,749 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 06:41:37,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58667 conditions, 47303 events. 11429/47303 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 578783 event pairs, 7181 based on Foata normal form. 0/38854 useless extension candidates. Maximal degree in co-relation 28833. Up to 11264 conditions per place. [2023-09-01 06:41:37,291 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 366 transitions, 930 flow [2023-09-01 06:41:37,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 366 transitions, 930 flow [2023-09-01 06:41:37,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:41:37,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 366 transitions, 930 flow [2023-09-01 06:41:37,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 366 transitions, 930 flow [2023-09-01 06:41:37,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 366 transitions, 930 flow [2023-09-01 06:41:46,664 INFO L130 PetriNetUnfolder]: 11429/47303 cut-off events. [2023-09-01 06:41:46,665 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-09-01 06:41:47,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58667 conditions, 47303 events. 11429/47303 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 578783 event pairs, 7181 based on Foata normal form. 0/38854 useless extension candidates. Maximal degree in co-relation 28833. Up to 11264 conditions per place. [2023-09-01 06:41:49,164 INFO L119 LiptonReduction]: Number of co-enabled transitions 87780 [2023-09-01 06:41:53,310 INFO L134 LiptonReduction]: Checked pairs total: 167331 [2023-09-01 06:41:53,310 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-09-01 06:41:53,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:41:53,311 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:41:53,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:41:53,406 INFO L130 PetriNetUnfolder]: 385/1506 cut-off events. [2023-09-01 06:41:53,406 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-09-01 06:41:53,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:41:53,406 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 06:41:53,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:41:53,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:41:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 19224353, now seen corresponding path program 1 times [2023-09-01 06:41:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:41:53,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176356444] [2023-09-01 06:41:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:41:53,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:41:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:53,431 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:41:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:41:53,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:41:53,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:41:53,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:41:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 06:41:53,455 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:41:53,456 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:41:53,456 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:41:53,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-09-01 06:41:53,484 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-09-01 06:41:53,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 387 transitions, 1002 flow [2023-09-01 06:42:12,818 INFO L130 PetriNetUnfolder]: 24755/95533 cut-off events. [2023-09-01 06:42:12,819 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 06:42:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120224 conditions, 95533 events. 24755/95533 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 1280818 event pairs, 16398 based on Foata normal form. 0/78870 useless extension candidates. Maximal degree in co-relation 58643. Up to 24576 conditions per place. [2023-09-01 06:42:14,919 INFO L82 GeneralOperation]: Start removeDead. Operand has 353 places, 387 transitions, 1002 flow [2023-09-01 06:42:15,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 353 places, 387 transitions, 1002 flow [2023-09-01 06:42:15,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:42:15,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 353 places, 387 transitions, 1002 flow [2023-09-01 06:42:15,724 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 353 places, 387 transitions, 1002 flow [2023-09-01 06:42:15,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 353 places, 387 transitions, 1002 flow [2023-09-01 06:42:35,103 INFO L130 PetriNetUnfolder]: 24755/95533 cut-off events. [2023-09-01 06:42:35,104 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-09-01 06:42:37,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120224 conditions, 95533 events. 24755/95533 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 1280818 event pairs, 16398 based on Foata normal form. 0/78870 useless extension candidates. Maximal degree in co-relation 58643. Up to 24576 conditions per place. [2023-09-01 06:42:43,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 100776 [2023-09-01 06:42:47,143 INFO L134 LiptonReduction]: Checked pairs total: 184747 [2023-09-01 06:42:47,143 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-09-01 06:42:47,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:42:47,145 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:42:47,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:42:47,274 INFO L130 PetriNetUnfolder]: 602/2188 cut-off events. [2023-09-01 06:42:47,274 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-09-01 06:42:47,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:42:47,275 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 06:42:47,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:42:47,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:42:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash 105290625, now seen corresponding path program 1 times [2023-09-01 06:42:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:42:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413263579] [2023-09-01 06:42:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:42:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:42:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:42:47,300 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:42:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:42:47,334 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:42:47,335 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:42:47,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:42:47,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 06:42:47,335 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:42:47,338 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:42:47,338 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:42:47,338 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-09-01 06:42:47,372 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-09-01 06:42:47,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 372 places, 408 transitions, 1076 flow [2023-09-01 06:43:31,346 INFO L130 PetriNetUnfolder]: 53441/193939 cut-off events. [2023-09-01 06:43:31,347 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 06:43:36,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247318 conditions, 193939 events. 53441/193939 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2895. Compared 2843103 event pairs, 36879 based on Foata normal form. 0/160870 useless extension candidates. Maximal degree in co-relation 120198. Up to 53248 conditions per place. [2023-09-01 06:43:36,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 372 places, 408 transitions, 1076 flow [2023-09-01 06:43:39,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 372 places, 408 transitions, 1076 flow [2023-09-01 06:43:39,248 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 06:43:39,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 372 places, 408 transitions, 1076 flow [2023-09-01 06:43:39,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 372 places, 408 transitions, 1076 flow [2023-09-01 06:43:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 372 places, 408 transitions, 1076 flow [2023-09-01 06:44:26,601 INFO L130 PetriNetUnfolder]: 53441/193939 cut-off events. [2023-09-01 06:44:26,602 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-09-01 06:44:32,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247318 conditions, 193939 events. 53441/193939 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2895. Compared 2843103 event pairs, 36879 based on Foata normal form. 0/160870 useless extension candidates. Maximal degree in co-relation 120198. Up to 53248 conditions per place. [2023-09-01 06:44:45,561 INFO L119 LiptonReduction]: Number of co-enabled transitions 114608 [2023-09-01 06:44:49,645 INFO L134 LiptonReduction]: Checked pairs total: 218774 [2023-09-01 06:44:49,645 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-09-01 06:44:49,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 06:44:49,652 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;@10dedf58, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 06:44:49,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 06:44:49,885 INFO L130 PetriNetUnfolder]: 955/3233 cut-off events. [2023-09-01 06:44:49,885 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-09-01 06:44:49,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 06:44:49,886 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 06:44:49,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 06:44:49,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 06:44:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash -437100337, now seen corresponding path program 1 times [2023-09-01 06:44:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 06:44:49,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55238364] [2023-09-01 06:44:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 06:44:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 06:44:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:44:49,913 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 06:44:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 06:44:49,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 06:44:49,937 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 06:44:49,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 06:44:49,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 06:44:49,938 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-09-01 06:44:49,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 06:44:49,939 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 06:44:49,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-09-01 06:44:49,973 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-09-01 06:44:49,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 391 places, 429 transitions, 1152 flow