./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 21:04:08,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 21:04:08,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 21:04:08,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 21:04:08,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 21:04:08,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 21:04:08,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 21:04:08,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 21:04:08,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 21:04:08,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 21:04:08,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 21:04:08,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 21:04:08,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 21:04:08,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 21:04:08,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 21:04:08,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 21:04:08,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 21:04:08,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 21:04:08,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 21:04:08,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 21:04:08,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 21:04:08,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 21:04:08,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 21:04:08,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 21:04:08,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 21:04:08,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 21:04:08,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 21:04:08,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 21:04:08,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 21:04:08,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 21:04:08,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 21:04:08,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 21:04:08,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 21:04:08,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 21:04:08,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 21:04:08,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 21:04:08,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 21:04:08,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 21:04:08,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 21:04:08,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 21:04:08,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 21:04:08,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 21:04:08,333 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 21:04:08,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 21:04:08,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 21:04:08,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 21:04:08,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 21:04:08,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 21:04:08,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 21:04:08,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 21:04:08,337 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 21:04:08,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 21:04:08,338 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 21:04:08,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 21:04:08,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 21:04:08,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 21:04:08,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 21:04:08,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 21:04:08,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 21:04:08,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 21:04:08,340 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 21:04:08,340 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 21:04:08,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 21:04:08,340 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 21:04:08,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 21:04:08,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 21:04:08,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 21:04:08,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 21:04:08,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:04:08,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 21:04:08,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 21:04:08,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 21:04:08,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 21:04:08,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 21:04:08,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 21:04:08,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 21:04:08,343 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 21:04:08,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 21:04:08,343 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 21:04:08,343 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 21:04:08,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 21:04:08,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 21:04:08,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 21:04:08,658 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 21:04:08,658 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 21:04:08,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-31 21:04:09,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 21:04:10,182 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 21:04:10,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-31 21:04:10,200 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a0ad3cc/8710dc5224b9479493f7a2b4b97263ba/FLAGbf3f26c9e [2023-08-31 21:04:10,216 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a0ad3cc/8710dc5224b9479493f7a2b4b97263ba [2023-08-31 21:04:10,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 21:04:10,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 21:04:10,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 21:04:10,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 21:04:10,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 21:04:10,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4152b752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10, skipping insertion in model container [2023-08-31 21:04:10,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 21:04:10,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 21:04:10,629 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_79-equ_racefree.i[47038,47051] [2023-08-31 21:04:10,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:04:10,682 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 21:04:10,741 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_79-equ_racefree.i[47038,47051] [2023-08-31 21:04:10,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 21:04:10,846 INFO L208 MainTranslator]: Completed translation [2023-08-31 21:04:10,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10 WrapperNode [2023-08-31 21:04:10,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 21:04:10,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 21:04:10,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 21:04:10,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 21:04:10,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,907 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 267 [2023-08-31 21:04:10,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 21:04:10,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 21:04:10,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 21:04:10,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 21:04:10,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,975 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 21:04:10,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 21:04:10,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 21:04:10,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 21:04:10,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (1/1) ... [2023-08-31 21:04:10,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 21:04:11,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:04:11,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 21:04:11,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 21:04:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 21:04:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 21:04:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 21:04:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 21:04:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 21:04:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 21:04:11,049 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 21:04:11,050 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 21:04:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 21:04:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 21:04:11,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 21:04:11,051 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 21:04:11,205 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 21:04:11,206 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 21:04:11,648 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 21:04:11,657 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 21:04:11,657 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-31 21:04:11,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:04:11 BoogieIcfgContainer [2023-08-31 21:04:11,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 21:04:11,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 21:04:11,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 21:04:11,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 21:04:11,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 09:04:10" (1/3) ... [2023-08-31 21:04:11,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f132d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:04:11, skipping insertion in model container [2023-08-31 21:04:11,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 09:04:10" (2/3) ... [2023-08-31 21:04:11,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f132d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 09:04:11, skipping insertion in model container [2023-08-31 21:04:11,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 09:04:11" (3/3) ... [2023-08-31 21:04:11,667 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-08-31 21:04:11,679 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 21:04:11,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 21:04:11,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-31 21:04:11,688 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 21:04:11,774 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 21:04:11,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 273 transitions, 554 flow [2023-08-31 21:04:11,918 INFO L130 PetriNetUnfolder]: 43/382 cut-off events. [2023-08-31 21:04:11,918 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 21:04:11,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 382 events. 43/382 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1513 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-31 21:04:11,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 273 transitions, 554 flow [2023-08-31 21:04:11,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 266 transitions, 537 flow [2023-08-31 21:04:11,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:11,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 266 transitions, 537 flow [2023-08-31 21:04:11,974 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 266 transitions, 537 flow [2023-08-31 21:04:11,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 266 transitions, 537 flow [2023-08-31 21:04:12,051 INFO L130 PetriNetUnfolder]: 41/375 cut-off events. [2023-08-31 21:04:12,052 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:04:12,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 375 events. 41/375 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1481 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-31 21:04:12,069 INFO L119 LiptonReduction]: Number of co-enabled transitions 20700 [2023-08-31 21:04:17,600 INFO L134 LiptonReduction]: Checked pairs total: 102344 [2023-08-31 21:04:17,600 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-31 21:04:17,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:17,627 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:17,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:17,640 INFO L130 PetriNetUnfolder]: 9/43 cut-off events. [2023-08-31 21:04:17,640 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 21:04:17,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:17,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 21:04:17,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:17,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2137298670, now seen corresponding path program 1 times [2023-08-31 21:04:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:17,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779028087] [2023-08-31 21:04:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:17,822 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:17,893 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:17,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:17,895 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 21:04:17,898 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:04:17,900 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:17,901 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:17,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 21:04:17,960 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 21:04:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 365 transitions, 748 flow [2023-08-31 21:04:18,065 INFO L130 PetriNetUnfolder]: 72/613 cut-off events. [2023-08-31 21:04:18,066 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:04:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 613 events. 72/613 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3007 event pairs, 0 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 384. Up to 12 conditions per place. [2023-08-31 21:04:18,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 365 transitions, 748 flow [2023-08-31 21:04:18,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 363 transitions, 744 flow [2023-08-31 21:04:18,079 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:18,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 327 places, 363 transitions, 744 flow [2023-08-31 21:04:18,080 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 327 places, 363 transitions, 744 flow [2023-08-31 21:04:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 363 transitions, 744 flow [2023-08-31 21:04:18,181 INFO L130 PetriNetUnfolder]: 71/611 cut-off events. [2023-08-31 21:04:18,181 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 21:04:18,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 71/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3018 event pairs, 0 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 382. Up to 12 conditions per place. [2023-08-31 21:04:18,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 59580 [2023-08-31 21:04:25,354 INFO L134 LiptonReduction]: Checked pairs total: 366503 [2023-08-31 21:04:25,354 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 21:04:25,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:25,357 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:25,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:25,366 INFO L130 PetriNetUnfolder]: 21/122 cut-off events. [2023-08-31 21:04:25,367 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 21:04:25,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:25,367 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 21:04:25,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:25,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash -456530707, now seen corresponding path program 1 times [2023-08-31 21:04:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:25,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545393033] [2023-08-31 21:04:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:25,400 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:25,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:25,434 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:25,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:25,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 21:04:25,435 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:04:25,435 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:25,436 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:25,436 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 21:04:25,471 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 21:04:25,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 457 transitions, 944 flow [2023-08-31 21:04:25,642 INFO L130 PetriNetUnfolder]: 106/887 cut-off events. [2023-08-31 21:04:25,642 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:04:25,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 887 events. 106/887 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4768 event pairs, 1 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 621. Up to 16 conditions per place. [2023-08-31 21:04:25,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 409 places, 457 transitions, 944 flow [2023-08-31 21:04:25,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 408 places, 455 transitions, 940 flow [2023-08-31 21:04:25,669 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:25,669 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 408 places, 455 transitions, 940 flow [2023-08-31 21:04:25,669 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 408 places, 455 transitions, 940 flow [2023-08-31 21:04:25,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 408 places, 455 transitions, 940 flow [2023-08-31 21:04:25,824 INFO L130 PetriNetUnfolder]: 105/885 cut-off events. [2023-08-31 21:04:25,825 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:04:25,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 885 events. 105/885 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4799 event pairs, 1 based on Foata normal form. 0/733 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-08-31 21:04:25,878 INFO L119 LiptonReduction]: Number of co-enabled transitions 114480 [2023-08-31 21:04:31,275 INFO L134 LiptonReduction]: Checked pairs total: 589743 [2023-08-31 21:04:31,275 INFO L136 LiptonReduction]: Total number of compositions: 254 [2023-08-31 21:04:31,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:31,278 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:31,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:31,297 INFO L130 PetriNetUnfolder]: 37/222 cut-off events. [2023-08-31 21:04:31,298 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 21:04:31,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:31,298 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 21:04:31,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:31,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:31,299 INFO L85 PathProgramCache]: Analyzing trace with hash 407657265, now seen corresponding path program 1 times [2023-08-31 21:04:31,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:31,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403183972] [2023-08-31 21:04:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:31,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:31,323 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:31,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:31,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:31,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 21:04:31,345 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:04:31,346 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:31,346 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:31,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 21:04:31,377 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:04:31,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 490 places, 549 transitions, 1142 flow [2023-08-31 21:04:31,721 INFO L130 PetriNetUnfolder]: 152/1249 cut-off events. [2023-08-31 21:04:31,721 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:04:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 1249 events. 152/1249 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 7117 event pairs, 6 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 907. Up to 32 conditions per place. [2023-08-31 21:04:31,747 INFO L82 GeneralOperation]: Start removeDead. Operand has 490 places, 549 transitions, 1142 flow [2023-08-31 21:04:31,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 489 places, 547 transitions, 1138 flow [2023-08-31 21:04:31,759 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:31,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 489 places, 547 transitions, 1138 flow [2023-08-31 21:04:31,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 489 places, 547 transitions, 1138 flow [2023-08-31 21:04:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 489 places, 547 transitions, 1138 flow [2023-08-31 21:04:32,048 INFO L130 PetriNetUnfolder]: 151/1247 cut-off events. [2023-08-31 21:04:32,049 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:04:32,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 1247 events. 151/1247 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 7177 event pairs, 6 based on Foata normal form. 0/1035 useless extension candidates. Maximal degree in co-relation 905. Up to 32 conditions per place. [2023-08-31 21:04:32,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 186120 [2023-08-31 21:04:37,968 INFO L134 LiptonReduction]: Checked pairs total: 1081355 [2023-08-31 21:04:37,969 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-08-31 21:04:37,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:37,971 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:37,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:37,998 INFO L130 PetriNetUnfolder]: 55/341 cut-off events. [2023-08-31 21:04:37,999 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:04:37,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:37,999 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:37,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:37,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 931640720, now seen corresponding path program 1 times [2023-08-31 21:04:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084261248] [2023-08-31 21:04:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:38,026 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:38,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:38,066 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:38,066 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:38,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 21:04:38,067 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:04:38,067 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:38,068 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:38,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 21:04:38,106 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 21:04:38,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 571 places, 641 transitions, 1342 flow [2023-08-31 21:04:38,576 INFO L130 PetriNetUnfolder]: 226/1791 cut-off events. [2023-08-31 21:04:38,577 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 21:04:38,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1902 conditions, 1791 events. 226/1791 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 10838 event pairs, 23 based on Foata normal form. 0/1494 useless extension candidates. Maximal degree in co-relation 1294. Up to 80 conditions per place. [2023-08-31 21:04:38,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 571 places, 641 transitions, 1342 flow [2023-08-31 21:04:38,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 570 places, 639 transitions, 1338 flow [2023-08-31 21:04:38,652 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:38,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 570 places, 639 transitions, 1338 flow [2023-08-31 21:04:38,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 570 places, 639 transitions, 1338 flow [2023-08-31 21:04:38,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 570 places, 639 transitions, 1338 flow [2023-08-31 21:04:39,162 INFO L130 PetriNetUnfolder]: 225/1789 cut-off events. [2023-08-31 21:04:39,163 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 21:04:39,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1900 conditions, 1789 events. 225/1789 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 10860 event pairs, 23 based on Foata normal form. 0/1493 useless extension candidates. Maximal degree in co-relation 1292. Up to 80 conditions per place. [2023-08-31 21:04:39,322 INFO L119 LiptonReduction]: Number of co-enabled transitions 274500 [2023-08-31 21:04:45,709 INFO L134 LiptonReduction]: Checked pairs total: 1438710 [2023-08-31 21:04:45,710 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-31 21:04:45,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:45,712 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:45,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:45,756 INFO L130 PetriNetUnfolder]: 79/476 cut-off events. [2023-08-31 21:04:45,757 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2023-08-31 21:04:45,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:45,757 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:45,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:45,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1867693320, now seen corresponding path program 1 times [2023-08-31 21:04:45,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:45,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10091032] [2023-08-31 21:04:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:45,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:45,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:45,805 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:45,805 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 21:04:45,806 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:04:45,806 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:45,806 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:45,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 21:04:45,852 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-31 21:04:45,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 652 places, 733 transitions, 1544 flow [2023-08-31 21:04:46,577 INFO L130 PetriNetUnfolder]: 364/2701 cut-off events. [2023-08-31 21:04:46,577 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-31 21:04:46,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 2701 events. 364/2701 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 18041 event pairs, 72 based on Foata normal form. 0/2272 useless extension candidates. Maximal degree in co-relation 1890. Up to 192 conditions per place. [2023-08-31 21:04:46,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 652 places, 733 transitions, 1544 flow [2023-08-31 21:04:46,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 651 places, 731 transitions, 1540 flow [2023-08-31 21:04:46,718 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:46,718 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 651 places, 731 transitions, 1540 flow [2023-08-31 21:04:46,719 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 651 places, 731 transitions, 1540 flow [2023-08-31 21:04:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 651 places, 731 transitions, 1540 flow [2023-08-31 21:04:47,552 INFO L130 PetriNetUnfolder]: 363/2699 cut-off events. [2023-08-31 21:04:47,553 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-31 21:04:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2931 conditions, 2699 events. 363/2699 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 18098 event pairs, 72 based on Foata normal form. 0/2271 useless extension candidates. Maximal degree in co-relation 1888. Up to 192 conditions per place. [2023-08-31 21:04:47,862 INFO L119 LiptonReduction]: Number of co-enabled transitions 379620 [2023-08-31 21:04:55,443 INFO L134 LiptonReduction]: Checked pairs total: 2221085 [2023-08-31 21:04:55,443 INFO L136 LiptonReduction]: Total number of compositions: 383 [2023-08-31 21:04:55,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:04:55,446 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:04:55,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:04:55,514 INFO L130 PetriNetUnfolder]: 100/617 cut-off events. [2023-08-31 21:04:55,514 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2023-08-31 21:04:55,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:04:55,515 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:04:55,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:04:55,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:04:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1200375547, now seen corresponding path program 1 times [2023-08-31 21:04:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:04:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138680934] [2023-08-31 21:04:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:04:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:04:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:55,565 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:04:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:04:55,612 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:04:55,612 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:04:55,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:04:55,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 21:04:55,613 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:04:55,613 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:04:55,613 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:04:55,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 21:04:55,680 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-31 21:04:55,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 733 places, 825 transitions, 1748 flow [2023-08-31 21:04:56,943 INFO L130 PetriNetUnfolder]: 646/4363 cut-off events. [2023-08-31 21:04:56,943 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-31 21:04:57,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4861 conditions, 4363 events. 646/4363 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 32879 event pairs, 201 based on Foata normal form. 0/3706 useless extension candidates. Maximal degree in co-relation 2919. Up to 448 conditions per place. [2023-08-31 21:04:57,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 733 places, 825 transitions, 1748 flow [2023-08-31 21:04:57,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 732 places, 823 transitions, 1744 flow [2023-08-31 21:04:57,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:04:57,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 732 places, 823 transitions, 1744 flow [2023-08-31 21:04:57,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 732 places, 823 transitions, 1744 flow [2023-08-31 21:04:57,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 732 places, 823 transitions, 1744 flow [2023-08-31 21:04:58,582 INFO L130 PetriNetUnfolder]: 645/4361 cut-off events. [2023-08-31 21:04:58,582 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-31 21:04:58,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 4361 events. 645/4361 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 32890 event pairs, 201 based on Foata normal form. 0/3705 useless extension candidates. Maximal degree in co-relation 2917. Up to 448 conditions per place. [2023-08-31 21:04:58,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 501480 [2023-08-31 21:05:06,584 INFO L134 LiptonReduction]: Checked pairs total: 2645390 [2023-08-31 21:05:06,584 INFO L136 LiptonReduction]: Total number of compositions: 418 [2023-08-31 21:05:06,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:05:06,586 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:05:06,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:05:06,685 INFO L130 PetriNetUnfolder]: 126/774 cut-off events. [2023-08-31 21:05:06,685 INFO L131 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2023-08-31 21:05:06,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:05:06,685 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:05:06,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:05:06,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:05:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash 54136088, now seen corresponding path program 1 times [2023-08-31 21:05:06,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:05:06,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600682213] [2023-08-31 21:05:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:05:06,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:05:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:06,711 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:05:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:06,735 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:05:06,735 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:05:06,735 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:05:06,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 21:05:06,736 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:05:06,736 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:05:06,736 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:05:06,736 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 21:05:06,800 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-31 21:05:06,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 814 places, 917 transitions, 1954 flow [2023-08-31 21:05:09,560 INFO L130 PetriNetUnfolder]: 1248/7561 cut-off events. [2023-08-31 21:05:09,560 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-08-31 21:05:09,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8646 conditions, 7561 events. 1248/7561 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 65383 event pairs, 522 based on Foata normal form. 0/6484 useless extension candidates. Maximal degree in co-relation 4845. Up to 1024 conditions per place. [2023-08-31 21:05:09,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 814 places, 917 transitions, 1954 flow [2023-08-31 21:05:09,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 813 places, 915 transitions, 1950 flow [2023-08-31 21:05:09,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:05:09,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 813 places, 915 transitions, 1950 flow [2023-08-31 21:05:09,875 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 813 places, 915 transitions, 1950 flow [2023-08-31 21:05:09,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 813 places, 915 transitions, 1950 flow [2023-08-31 21:05:12,497 INFO L130 PetriNetUnfolder]: 1247/7559 cut-off events. [2023-08-31 21:05:12,497 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-08-31 21:05:12,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8644 conditions, 7559 events. 1247/7559 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 65448 event pairs, 522 based on Foata normal form. 0/6483 useless extension candidates. Maximal degree in co-relation 4843. Up to 1024 conditions per place. [2023-08-31 21:05:13,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 640080 [2023-08-31 21:05:22,500 INFO L134 LiptonReduction]: Checked pairs total: 3761348 [2023-08-31 21:05:22,501 INFO L136 LiptonReduction]: Total number of compositions: 471 [2023-08-31 21:05:22,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:05:22,503 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:05:22,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:05:22,638 INFO L130 PetriNetUnfolder]: 152/943 cut-off events. [2023-08-31 21:05:22,638 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2023-08-31 21:05:22,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:05:22,638 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:05:22,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:05:22,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:05:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash 861910118, now seen corresponding path program 1 times [2023-08-31 21:05:22,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:05:22,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357119026] [2023-08-31 21:05:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:05:22,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:05:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:22,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:05:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:22,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:05:22,687 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:05:22,687 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:05:22,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 21:05:22,688 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:05:22,688 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:05:22,689 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:05:22,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 21:05:22,751 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-31 21:05:22,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 895 places, 1009 transitions, 2162 flow [2023-08-31 21:05:28,489 INFO L130 PetriNetUnfolder]: 2554/13895 cut-off events. [2023-08-31 21:05:28,489 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-08-31 21:05:29,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16272 conditions, 13895 events. 2554/13895 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 138497 event pairs, 1291 based on Foata normal form. 0/12014 useless extension candidates. Maximal degree in co-relation 8628. Up to 2304 conditions per place. [2023-08-31 21:05:29,027 INFO L82 GeneralOperation]: Start removeDead. Operand has 895 places, 1009 transitions, 2162 flow [2023-08-31 21:05:29,230 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 894 places, 1007 transitions, 2158 flow [2023-08-31 21:05:29,230 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:05:29,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 894 places, 1007 transitions, 2158 flow [2023-08-31 21:05:29,230 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 894 places, 1007 transitions, 2158 flow [2023-08-31 21:05:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 894 places, 1007 transitions, 2158 flow [2023-08-31 21:05:34,818 INFO L130 PetriNetUnfolder]: 2553/13893 cut-off events. [2023-08-31 21:05:34,818 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-08-31 21:05:35,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16270 conditions, 13893 events. 2553/13893 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 139205 event pairs, 1291 based on Foata normal form. 0/12013 useless extension candidates. Maximal degree in co-relation 8626. Up to 2304 conditions per place. [2023-08-31 21:05:36,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 795420 [2023-08-31 21:05:45,506 INFO L134 LiptonReduction]: Checked pairs total: 4686292 [2023-08-31 21:05:45,507 INFO L136 LiptonReduction]: Total number of compositions: 507 [2023-08-31 21:05:45,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:05:45,509 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:05:45,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:05:45,661 INFO L130 PetriNetUnfolder]: 190/1142 cut-off events. [2023-08-31 21:05:45,662 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2023-08-31 21:05:45,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:05:45,662 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:05:45,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:05:45,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:05:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -253259648, now seen corresponding path program 1 times [2023-08-31 21:05:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:05:45,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253651214] [2023-08-31 21:05:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:05:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:05:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:45,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:05:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:05:45,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:05:45,707 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:05:45,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:05:45,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 21:05:45,708 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:05:45,709 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:05:45,709 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:05:45,709 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 21:05:45,771 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-31 21:05:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 976 places, 1101 transitions, 2372 flow [2023-08-31 21:05:57,762 INFO L130 PetriNetUnfolder]: 5396/26629 cut-off events. [2023-08-31 21:05:57,762 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-08-31 21:05:59,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31835 conditions, 26629 events. 5396/26629 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 299408 event pairs, 3084 based on Foata normal form. 0/23176 useless extension candidates. Maximal degree in co-relation 16252. Up to 5120 conditions per place. [2023-08-31 21:05:59,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 976 places, 1101 transitions, 2372 flow [2023-08-31 21:06:00,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 975 places, 1099 transitions, 2368 flow [2023-08-31 21:06:00,061 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:06:00,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 975 places, 1099 transitions, 2368 flow [2023-08-31 21:06:00,061 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 975 places, 1099 transitions, 2368 flow [2023-08-31 21:06:00,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 975 places, 1099 transitions, 2368 flow [2023-08-31 21:06:12,350 INFO L130 PetriNetUnfolder]: 5395/26627 cut-off events. [2023-08-31 21:06:12,350 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-08-31 21:06:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31833 conditions, 26627 events. 5395/26627 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 299520 event pairs, 3084 based on Foata normal form. 0/23175 useless extension candidates. Maximal degree in co-relation 16250. Up to 5120 conditions per place. [2023-08-31 21:06:17,245 INFO L119 LiptonReduction]: Number of co-enabled transitions 967500 [2023-08-31 21:06:25,934 INFO L134 LiptonReduction]: Checked pairs total: 5192449 [2023-08-31 21:06:25,934 INFO L136 LiptonReduction]: Total number of compositions: 556 [2023-08-31 21:06:25,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:06:25,936 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:06:25,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:06:26,157 INFO L130 PetriNetUnfolder]: 216/1358 cut-off events. [2023-08-31 21:06:26,157 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2023-08-31 21:06:26,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:06:26,158 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:06:26,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:06:26,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:06:26,158 INFO L85 PathProgramCache]: Analyzing trace with hash -151745049, now seen corresponding path program 1 times [2023-08-31 21:06:26,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:06:26,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777021763] [2023-08-31 21:06:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:06:26,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:06:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:06:26,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:06:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:06:26,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:06:26,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:06:26,206 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:06:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 21:06:26,206 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:06:26,207 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:06:26,207 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:06:26,207 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 21:06:26,274 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-31 21:06:26,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1057 places, 1193 transitions, 2584 flow [2023-08-31 21:06:56,930 INFO L130 PetriNetUnfolder]: 11566/52419 cut-off events. [2023-08-31 21:06:56,930 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-08-31 21:07:03,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63783 conditions, 52419 events. 11566/52419 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 656732 event pairs, 7181 based on Foata normal form. 0/45858 useless extension candidates. Maximal degree in co-relation 31813. Up to 11264 conditions per place. [2023-08-31 21:07:03,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 1057 places, 1193 transitions, 2584 flow [2023-08-31 21:07:05,071 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1056 places, 1191 transitions, 2580 flow [2023-08-31 21:07:05,071 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:07:05,072 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1056 places, 1191 transitions, 2580 flow [2023-08-31 21:07:05,072 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1056 places, 1191 transitions, 2580 flow [2023-08-31 21:07:05,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1056 places, 1191 transitions, 2580 flow [2023-08-31 21:07:30,832 INFO L130 PetriNetUnfolder]: 11565/52417 cut-off events. [2023-08-31 21:07:30,833 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-08-31 21:07:34,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63781 conditions, 52417 events. 11565/52417 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 656994 event pairs, 7181 based on Foata normal form. 0/45857 useless extension candidates. Maximal degree in co-relation 31811. Up to 11264 conditions per place. [2023-08-31 21:07:41,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 1156320 [2023-08-31 21:07:50,396 INFO L134 LiptonReduction]: Checked pairs total: 6171966 [2023-08-31 21:07:50,396 INFO L136 LiptonReduction]: Total number of compositions: 590 [2023-08-31 21:07:50,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:07:50,397 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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:07:50,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:07:50,653 INFO L130 PetriNetUnfolder]: 256/1628 cut-off events. [2023-08-31 21:07:50,653 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2023-08-31 21:07:50,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:07:50,653 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:07:50,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:07:50,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:07:50,654 INFO L85 PathProgramCache]: Analyzing trace with hash -866869317, now seen corresponding path program 1 times [2023-08-31 21:07:50,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:07:50,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136503354] [2023-08-31 21:07:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:07:50,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:07:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:07:50,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:07:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:07:50,716 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:07:50,716 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:07:50,717 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:07:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 21:07:50,717 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:07:50,718 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:07:50,718 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:07:50,718 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 21:07:50,789 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-31 21:07:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1138 places, 1285 transitions, 2798 flow [2023-08-31 21:08:48,654 INFO L130 PetriNetUnfolder]: 24904/104833 cut-off events. [2023-08-31 21:08:48,654 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-08-31 21:09:02,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129524 conditions, 104833 events. 24904/104833 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 1453533 event pairs, 16398 based on Foata normal form. 0/92092 useless extension candidates. Maximal degree in co-relation 63759. Up to 24576 conditions per place. [2023-08-31 21:09:02,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 1138 places, 1285 transitions, 2798 flow [2023-08-31 21:09:06,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1137 places, 1283 transitions, 2794 flow [2023-08-31 21:09:06,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:09:06,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1137 places, 1283 transitions, 2794 flow [2023-08-31 21:09:06,509 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1137 places, 1283 transitions, 2794 flow [2023-08-31 21:09:06,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1137 places, 1283 transitions, 2794 flow [2023-08-31 21:10:03,451 INFO L130 PetriNetUnfolder]: 24903/104831 cut-off events. [2023-08-31 21:10:03,451 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-08-31 21:10:18,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129522 conditions, 104831 events. 24903/104831 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 1452975 event pairs, 16398 based on Foata normal form. 0/92091 useless extension candidates. Maximal degree in co-relation 63757. Up to 24576 conditions per place. [2023-08-31 21:10:46,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 1361880 [2023-08-31 21:10:56,057 INFO L134 LiptonReduction]: Checked pairs total: 7289128 [2023-08-31 21:10:56,057 INFO L136 LiptonReduction]: Total number of compositions: 644 [2023-08-31 21:10:56,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:10:56,059 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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;@7c50fca3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:10:56,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:10:56,415 INFO L130 PetriNetUnfolder]: 318/1973 cut-off events. [2023-08-31 21:10:56,416 INFO L131 PetriNetUnfolder]: For 523/523 co-relation queries the response was YES. [2023-08-31 21:10:56,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:10:56,416 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:10:56,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:10:56,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:10:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash -891739267, now seen corresponding path program 1 times [2023-08-31 21:10:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:10:56,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765308609] [2023-08-31 21:10:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:10:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:10:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:10:56,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:10:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:10:56,465 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:10:56,465 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:10:56,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:10:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 21:10:56,466 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 21:10:56,466 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:10:56,467 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:10:56,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 21:10:56,542 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-31 21:10:56,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1219 places, 1377 transitions, 3014 flow