./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for 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_70-funloop_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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 20:58:29,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 20:58:29,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 20:58:29,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 20:58:29,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 20:58:29,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 20:58:29,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 20:58:29,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 20:58:29,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 20:58:29,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 20:58:29,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 20:58:29,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 20:58:29,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 20:58:29,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 20:58:29,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 20:58:29,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 20:58:29,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 20:58:29,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 20:58:29,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 20:58:29,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 20:58:29,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 20:58:29,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 20:58:29,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 20:58:29,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 20:58:29,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 20:58:29,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 20:58:29,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 20:58:29,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 20:58:29,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 20:58:29,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 20:58:29,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 20:58:29,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 20:58:29,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 20:58:29,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 20:58:29,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 20:58:29,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 20:58:29,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 20:58:29,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 20:58:29,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 20:58:29,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 20:58:29,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 20:58:29,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 20:58:29,350 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 20:58:29,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 20:58:29,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 20:58:29,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 20:58:29,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 20:58:29,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 20:58:29,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 20:58:29,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 20:58:29,353 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 20:58:29,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 20:58:29,354 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 20:58:29,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 20:58:29,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 20:58:29,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 20:58:29,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 20:58:29,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 20:58:29,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 20:58:29,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 20:58:29,356 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 20:58:29,356 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 20:58:29,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 20:58:29,356 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 20:58:29,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 20:58:29,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 20:58:29,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 20:58:29,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 20:58:29,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:58:29,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 20:58:29,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 20:58:29,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 20:58:29,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 20:58:29,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 20:58:29,359 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 20:58:29,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 20:58:29,359 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 20:58:29,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 20:58:29,359 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 20:58:29,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 20:58:29,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 20:58:29,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 20:58:29,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 20:58:29,721 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 20:58:29,721 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 20:58:29,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-31 20:58:30,923 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 20:58:31,227 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 20:58:31,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-08-31 20:58:31,247 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb805777/c10761d85d27486ca8bb2cf10e2f0eff/FLAG4133f319d [2023-08-31 20:58:31,269 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb805777/c10761d85d27486ca8bb2cf10e2f0eff [2023-08-31 20:58:31,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 20:58:31,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 20:58:31,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 20:58:31,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 20:58:31,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 20:58:31,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:31,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ced94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31, skipping insertion in model container [2023-08-31 20:58:31,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:31,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 20:58:31,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 20:58:31,733 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-31 20:58:31,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:58:31,803 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 20:58:31,849 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-08-31 20:58:31,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:58:31,948 INFO L208 MainTranslator]: Completed translation [2023-08-31 20:58:31,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31 WrapperNode [2023-08-31 20:58:31,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 20:58:31,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 20:58:31,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 20:58:31,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 20:58:31,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:31,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,020 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 258 [2023-08-31 20:58:32,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 20:58:32,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 20:58:32,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 20:58:32,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 20:58:32,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 20:58:32,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 20:58:32,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 20:58:32,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 20:58:32,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (1/1) ... [2023-08-31 20:58:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:58:32,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:58:32,158 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 20:58:32,183 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 20:58:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 20:58:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 20:58:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 20:58:32,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 20:58:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 20:58:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 20:58:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 20:58:32,206 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 20:58:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 20:58:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 20:58:32,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 20:58:32,208 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 20:58:32,386 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 20:58:32,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 20:58:32,837 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 20:58:32,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 20:58:32,845 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-08-31 20:58:32,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:58:32 BoogieIcfgContainer [2023-08-31 20:58:32,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 20:58:32,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 20:58:32,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 20:58:32,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 20:58:32,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 08:58:31" (1/3) ... [2023-08-31 20:58:32,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3541d684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:58:32, skipping insertion in model container [2023-08-31 20:58:32,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:58:31" (2/3) ... [2023-08-31 20:58:32,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3541d684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:58:32, skipping insertion in model container [2023-08-31 20:58:32,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:58:32" (3/3) ... [2023-08-31 20:58:32,855 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-08-31 20:58:32,861 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 20:58:32,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 20:58:32,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-31 20:58:32,870 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 20:58:32,952 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 20:58:33,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 264 transitions, 536 flow [2023-08-31 20:58:33,164 INFO L130 PetriNetUnfolder]: 49/384 cut-off events. [2023-08-31 20:58:33,164 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 20:58:33,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 384 events. 49/384 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1614 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-31 20:58:33,175 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 264 transitions, 536 flow [2023-08-31 20:58:33,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 259 transitions, 523 flow [2023-08-31 20:58:33,192 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:58:33,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 259 transitions, 523 flow [2023-08-31 20:58:33,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 259 transitions, 523 flow [2023-08-31 20:58:33,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 259 transitions, 523 flow [2023-08-31 20:58:33,285 INFO L130 PetriNetUnfolder]: 48/379 cut-off events. [2023-08-31 20:58:33,285 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:58:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 379 events. 48/379 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1561 event pairs, 0 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2023-08-31 20:58:33,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 25704 [2023-08-31 20:58:35,970 INFO L134 LiptonReduction]: Checked pairs total: 98839 [2023-08-31 20:58:35,971 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-31 20:58:35,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:58:36,001 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;@254ffbef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:58:36,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:58:36,007 INFO L130 PetriNetUnfolder]: 8/38 cut-off events. [2023-08-31 20:58:36,007 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:58:36,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:36,008 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-31 20:58:36,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:36,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1541384093, now seen corresponding path program 1 times [2023-08-31 20:58:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:36,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058032453] [2023-08-31 20:58:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:36,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:36,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:36,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058032453] [2023-08-31 20:58:36,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058032453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 20:58:36,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 20:58:36,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 20:58:36,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90640894] [2023-08-31 20:58:36,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 20:58:36,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 20:58:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 20:58:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 20:58:36,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 419 [2023-08-31 20:58:36,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:36,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:36,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 419 [2023-08-31 20:58:36,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 20:58:36,607 INFO L130 PetriNetUnfolder]: 442/1574 cut-off events. [2023-08-31 20:58:36,607 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:58:36,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 1574 events. 442/1574 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 10563 event pairs, 360 based on Foata normal form. 199/1621 useless extension candidates. Maximal degree in co-relation 2309. Up to 823 conditions per place. [2023-08-31 20:58:36,612 INFO L137 encePairwiseOnDemand]: 393/419 looper letters, 25 selfloop transitions, 2 changer transitions 54/112 dead transitions. [2023-08-31 20:58:36,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 112 transitions, 319 flow [2023-08-31 20:58:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 20:58:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 20:58:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 756 transitions. [2023-08-31 20:58:36,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014319809069213 [2023-08-31 20:58:36,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 756 transitions. [2023-08-31 20:58:36,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 756 transitions. [2023-08-31 20:58:36,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 20:58:36,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 756 transitions. [2023-08-31 20:58:36,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:36,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:36,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 419.0) internal successors, (1676), 4 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:36,653 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 273 flow. Second operand 3 states and 756 transitions. [2023-08-31 20:58:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 112 transitions, 319 flow [2023-08-31 20:58:36,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 112 transitions, 319 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 20:58:36,658 INFO L231 Difference]: Finished difference. Result has 112 places, 58 transitions, 131 flow [2023-08-31 20:58:36,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=112, PETRI_TRANSITIONS=58} [2023-08-31 20:58:36,662 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2023-08-31 20:58:36,663 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 58 transitions, 131 flow [2023-08-31 20:58:36,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:36,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:36,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-31 20:58:36,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 20:58:36,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:36,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1025875551, now seen corresponding path program 1 times [2023-08-31 20:58:36,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:36,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984898561] [2023-08-31 20:58:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:36,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:36,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:36,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984898561] [2023-08-31 20:58:36,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984898561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 20:58:36,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849673204] [2023-08-31 20:58:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:36,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:58:36,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 20:58:36,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 20:58:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:36,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 20:58:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 20:58:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:36,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 20:58:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:36,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849673204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 20:58:36,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 20:58:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 20:58:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215581760] [2023-08-31 20:58:36,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 20:58:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 20:58:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:36,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 20:58:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 20:58:36,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 419 [2023-08-31 20:58:36,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 58 transitions, 131 flow. Second operand has 7 states, 7 states have (on average 229.57142857142858) internal successors, (1607), 7 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:36,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:36,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 419 [2023-08-31 20:58:36,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 20:58:37,026 INFO L130 PetriNetUnfolder]: 63/265 cut-off events. [2023-08-31 20:58:37,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:58:37,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425 conditions, 265 events. 63/265 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 886 event pairs, 54 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 413. Up to 140 conditions per place. [2023-08-31 20:58:37,028 INFO L137 encePairwiseOnDemand]: 416/419 looper letters, 25 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2023-08-31 20:58:37,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 203 flow [2023-08-31 20:58:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 20:58:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 20:58:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1401 transitions. [2023-08-31 20:58:37,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5572792362768496 [2023-08-31 20:58:37,031 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1401 transitions. [2023-08-31 20:58:37,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1401 transitions. [2023-08-31 20:58:37,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 20:58:37,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1401 transitions. [2023-08-31 20:58:37,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.5) internal successors, (1401), 6 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,041 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 419.0) internal successors, (2933), 7 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,041 INFO L175 Difference]: Start difference. First operand has 112 places, 58 transitions, 131 flow. Second operand 6 states and 1401 transitions. [2023-08-31 20:58:37,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 203 flow [2023-08-31 20:58:37,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 199 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 20:58:37,043 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 163 flow [2023-08-31 20:58:37,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-31 20:58:37,044 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -43 predicate places. [2023-08-31 20:58:37,045 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 163 flow [2023-08-31 20:58:37,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 229.57142857142858) internal successors, (1607), 7 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:37,046 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-31 20:58:37,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 20:58:37,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:37,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:37,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1581250403, now seen corresponding path program 2 times [2023-08-31 20:58:37,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:37,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685912823] [2023-08-31 20:58:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:37,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685912823] [2023-08-31 20:58:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685912823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 20:58:37,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229508913] [2023-08-31 20:58:37,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 20:58:37,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:58:37,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 20:58:37,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 20:58:37,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 20:58:37,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 20:58:37,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 20:58:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 20:58:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 20:58:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 20:58:37,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229508913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 20:58:37,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 20:58:37,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 20:58:37,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039705192] [2023-08-31 20:58:37,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 20:58:37,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 20:58:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 20:58:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 20:58:37,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 419 [2023-08-31 20:58:37,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 163 flow. Second operand has 13 states, 13 states have (on average 229.30769230769232) internal successors, (2981), 13 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:37,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 419 [2023-08-31 20:58:37,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 20:58:37,707 INFO L130 PetriNetUnfolder]: 63/271 cut-off events. [2023-08-31 20:58:37,707 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-08-31 20:58:37,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 271 events. 63/271 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 896 event pairs, 54 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 404. Up to 140 conditions per place. [2023-08-31 20:58:37,709 INFO L137 encePairwiseOnDemand]: 416/419 looper letters, 25 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2023-08-31 20:58:37,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 271 flow [2023-08-31 20:58:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 20:58:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 20:58:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2778 transitions. [2023-08-31 20:58:37,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525059665871122 [2023-08-31 20:58:37,715 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2778 transitions. [2023-08-31 20:58:37,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2778 transitions. [2023-08-31 20:58:37,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 20:58:37,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2778 transitions. [2023-08-31 20:58:37,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.5) internal successors, (2778), 12 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 419.0) internal successors, (5447), 13 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,736 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 419.0) internal successors, (5447), 13 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,736 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 163 flow. Second operand 12 states and 2778 transitions. [2023-08-31 20:58:37,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 271 flow [2023-08-31 20:58:37,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 257 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 20:58:37,741 INFO L231 Difference]: Finished difference. Result has 83 places, 67 transitions, 233 flow [2023-08-31 20:58:37,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=419, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=233, PETRI_PLACES=83, PETRI_TRANSITIONS=67} [2023-08-31 20:58:37,742 INFO L281 CegarLoopForPetriNet]: 110 programPoint places, -27 predicate places. [2023-08-31 20:58:37,742 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 67 transitions, 233 flow [2023-08-31 20:58:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 229.30769230769232) internal successors, (2981), 13 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:37,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:37,746 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-31 20:58:37,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 20:58:37,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-31 20:58:37,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:37,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash -618048029, now seen corresponding path program 3 times [2023-08-31 20:58:37,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:37,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46397256] [2023-08-31 20:58:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:37,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:58:37,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:58:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:58:38,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:58:38,022 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:58:38,022 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:58:38,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 20:58:38,024 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 20:58:38,026 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:58:38,026 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:58:38,027 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 20:58:38,081 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 20:58:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 368 transitions, 754 flow [2023-08-31 20:58:38,163 INFO L130 PetriNetUnfolder]: 82/638 cut-off events. [2023-08-31 20:58:38,163 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 20:58:38,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 638 events. 82/638 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3356 event pairs, 0 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 386. Up to 12 conditions per place. [2023-08-31 20:58:38,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 368 transitions, 754 flow [2023-08-31 20:58:38,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 368 transitions, 754 flow [2023-08-31 20:58:38,179 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:58:38,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 325 places, 368 transitions, 754 flow [2023-08-31 20:58:38,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 325 places, 368 transitions, 754 flow [2023-08-31 20:58:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 368 transitions, 754 flow [2023-08-31 20:58:38,280 INFO L130 PetriNetUnfolder]: 82/638 cut-off events. [2023-08-31 20:58:38,281 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 20:58:38,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 638 events. 82/638 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3356 event pairs, 0 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 386. Up to 12 conditions per place. [2023-08-31 20:58:38,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 74460 [2023-08-31 20:58:41,368 INFO L134 LiptonReduction]: Checked pairs total: 295048 [2023-08-31 20:58:41,369 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-31 20:58:41,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:58:41,372 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;@254ffbef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:58:41,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:58:41,395 INFO L130 PetriNetUnfolder]: 25/118 cut-off events. [2023-08-31 20:58:41,396 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 20:58:41,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:41,396 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 20:58:41,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:41,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1878368134, now seen corresponding path program 1 times [2023-08-31 20:58:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:41,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639738766] [2023-08-31 20:58:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639738766] [2023-08-31 20:58:41,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639738766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 20:58:41,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 20:58:41,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 20:58:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084474232] [2023-08-31 20:58:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 20:58:41,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 20:58:41,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 20:58:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 20:58:41,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 578 [2023-08-31 20:58:41,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 200 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:41,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:41,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 578 [2023-08-31 20:58:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 20:58:45,290 INFO L130 PetriNetUnfolder]: 18367/41883 cut-off events. [2023-08-31 20:58:45,291 INFO L131 PetriNetUnfolder]: For 236/310 co-relation queries the response was YES. [2023-08-31 20:58:45,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68043 conditions, 41883 events. 18367/41883 cut-off events. For 236/310 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 441821 event pairs, 15876 based on Foata normal form. 4544/41662 useless extension candidates. Maximal degree in co-relation 30382. Up to 26041 conditions per place. [2023-08-31 20:58:45,424 INFO L137 encePairwiseOnDemand]: 543/578 looper letters, 45 selfloop transitions, 2 changer transitions 60/169 dead transitions. [2023-08-31 20:58:45,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 169 transitions, 496 flow [2023-08-31 20:58:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 20:58:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 20:58:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-31 20:58:45,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095732410611303 [2023-08-31 20:58:45,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-31 20:58:45,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-31 20:58:45,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 20:58:45,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-31 20:58:45,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:45,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:45,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:45,434 INFO L175 Difference]: Start difference. First operand has 164 places, 200 transitions, 418 flow. Second operand 3 states and 1057 transitions. [2023-08-31 20:58:45,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 169 transitions, 496 flow [2023-08-31 20:58:45,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 169 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 20:58:45,438 INFO L231 Difference]: Finished difference. Result has 167 places, 109 transitions, 240 flow [2023-08-31 20:58:45,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=167, PETRI_TRANSITIONS=109} [2023-08-31 20:58:45,439 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 3 predicate places. [2023-08-31 20:58:45,439 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 109 transitions, 240 flow [2023-08-31 20:58:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:45,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:45,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-31 20:58:45,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 20:58:45,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:45,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash 418106744, now seen corresponding path program 1 times [2023-08-31 20:58:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:45,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125692332] [2023-08-31 20:58:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:45,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:45,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:45,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125692332] [2023-08-31 20:58:45,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125692332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 20:58:45,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263913679] [2023-08-31 20:58:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:45,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:58:45,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 20:58:45,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 20:58:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:45,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 20:58:45,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 20:58:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:45,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 20:58:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263913679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 20:58:45,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 20:58:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 20:58:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838511419] [2023-08-31 20:58:45,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 20:58:45,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 20:58:45,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 20:58:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 20:58:45,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 578 [2023-08-31 20:58:45,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 109 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 318.7142857142857) internal successors, (2231), 7 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:45,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:45,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 578 [2023-08-31 20:58:45,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 20:58:46,097 INFO L130 PetriNetUnfolder]: 2757/6774 cut-off events. [2023-08-31 20:58:46,097 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-31 20:58:46,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10996 conditions, 6774 events. 2757/6774 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 54731 event pairs, 2448 based on Foata normal form. 0/5889 useless extension candidates. Maximal degree in co-relation 10983. Up to 4130 conditions per place. [2023-08-31 20:58:46,145 INFO L137 encePairwiseOnDemand]: 575/578 looper letters, 45 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2023-08-31 20:58:46,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 352 flow [2023-08-31 20:58:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 20:58:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 20:58:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1955 transitions. [2023-08-31 20:58:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-08-31 20:58:46,159 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1955 transitions. [2023-08-31 20:58:46,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1955 transitions. [2023-08-31 20:58:46,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 20:58:46,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1955 transitions. [2023-08-31 20:58:46,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 325.8333333333333) internal successors, (1955), 6 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:46,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:46,171 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 578.0) internal successors, (4046), 7 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:46,171 INFO L175 Difference]: Start difference. First operand has 167 places, 109 transitions, 240 flow. Second operand 6 states and 1955 transitions. [2023-08-31 20:58:46,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 352 flow [2023-08-31 20:58:46,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 112 transitions, 346 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-31 20:58:46,175 INFO L231 Difference]: Finished difference. Result has 118 places, 112 transitions, 270 flow [2023-08-31 20:58:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=118, PETRI_TRANSITIONS=112} [2023-08-31 20:58:46,180 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, -46 predicate places. [2023-08-31 20:58:46,180 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 112 transitions, 270 flow [2023-08-31 20:58:46,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 318.7142857142857) internal successors, (2231), 7 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:46,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:46,182 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 20:58:46,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 20:58:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:46,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:46,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1937551354, now seen corresponding path program 2 times [2023-08-31 20:58:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388075678] [2023-08-31 20:58:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:46,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:46,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388075678] [2023-08-31 20:58:46,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388075678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 20:58:46,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8676812] [2023-08-31 20:58:46,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 20:58:46,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:46,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:58:46,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 20:58:46,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 20:58:46,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 20:58:46,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 20:58:46,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 20:58:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 20:58:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:46,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 20:58:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-31 20:58:46,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8676812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 20:58:46,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 20:58:46,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 20:58:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145707832] [2023-08-31 20:58:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 20:58:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 20:58:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 20:58:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 20:58:46,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 578 [2023-08-31 20:58:46,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 112 transitions, 270 flow. Second operand has 13 states, 13 states have (on average 318.38461538461536) internal successors, (4139), 13 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:46,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:46,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 578 [2023-08-31 20:58:46,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 20:58:47,327 INFO L130 PetriNetUnfolder]: 2757/6780 cut-off events. [2023-08-31 20:58:47,327 INFO L131 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2023-08-31 20:58:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 6780 events. 2757/6780 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 54648 event pairs, 2448 based on Foata normal form. 6/5902 useless extension candidates. Maximal degree in co-relation 10966. Up to 4130 conditions per place. [2023-08-31 20:58:47,358 INFO L137 encePairwiseOnDemand]: 575/578 looper letters, 45 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2023-08-31 20:58:47,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 118 transitions, 418 flow [2023-08-31 20:58:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 20:58:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 20:58:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3866 transitions. [2023-08-31 20:58:47,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573817762399077 [2023-08-31 20:58:47,369 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3866 transitions. [2023-08-31 20:58:47,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3866 transitions. [2023-08-31 20:58:47,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 20:58:47,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3866 transitions. [2023-08-31 20:58:47,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 322.1666666666667) internal successors, (3866), 12 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:47,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 578.0) internal successors, (7514), 13 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:47,390 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 578.0) internal successors, (7514), 13 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:47,390 INFO L175 Difference]: Start difference. First operand has 118 places, 112 transitions, 270 flow. Second operand 12 states and 3866 transitions. [2023-08-31 20:58:47,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 118 transitions, 418 flow [2023-08-31 20:58:47,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 118 transitions, 404 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 20:58:47,393 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 340 flow [2023-08-31 20:58:47,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=340, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2023-08-31 20:58:47,394 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, -30 predicate places. [2023-08-31 20:58:47,395 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 340 flow [2023-08-31 20:58:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 318.38461538461536) internal successors, (4139), 13 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:47,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:47,396 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-31 20:58:47,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 20:58:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 20:58:47,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:47,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 28122938, now seen corresponding path program 3 times [2023-08-31 20:58:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:47,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742168267] [2023-08-31 20:58:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:58:47,630 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:58:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:58:47,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:58:47,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:58:47,660 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:58:47,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 20:58:47,660 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 20:58:47,661 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:58:47,661 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:58:47,661 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 20:58:47,725 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 20:58:47,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 472 transitions, 974 flow [2023-08-31 20:58:47,919 INFO L130 PetriNetUnfolder]: 120/935 cut-off events. [2023-08-31 20:58:47,919 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 20:58:47,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 935 events. 120/935 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5435 event pairs, 1 based on Foata normal form. 0/768 useless extension candidates. Maximal degree in co-relation 646. Up to 16 conditions per place. [2023-08-31 20:58:47,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 416 places, 472 transitions, 974 flow [2023-08-31 20:58:47,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 416 places, 472 transitions, 974 flow [2023-08-31 20:58:47,938 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:58:47,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 416 places, 472 transitions, 974 flow [2023-08-31 20:58:47,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 416 places, 472 transitions, 974 flow [2023-08-31 20:58:47,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 416 places, 472 transitions, 974 flow [2023-08-31 20:58:48,044 INFO L130 PetriNetUnfolder]: 120/935 cut-off events. [2023-08-31 20:58:48,045 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 20:58:48,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 935 events. 120/935 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5435 event pairs, 1 based on Foata normal form. 0/768 useless extension candidates. Maximal degree in co-relation 646. Up to 16 conditions per place. [2023-08-31 20:58:48,113 INFO L119 LiptonReduction]: Number of co-enabled transitions 143820 [2023-08-31 20:58:51,372 INFO L134 LiptonReduction]: Checked pairs total: 575299 [2023-08-31 20:58:51,372 INFO L136 LiptonReduction]: Total number of compositions: 263 [2023-08-31 20:58:51,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:58:51,374 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;@254ffbef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:58:51,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:58:51,388 INFO L130 PetriNetUnfolder]: 42/216 cut-off events. [2023-08-31 20:58:51,388 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-08-31 20:58:51,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:58:51,389 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 20:58:51,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:58:51,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:58:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1027943567, now seen corresponding path program 1 times [2023-08-31 20:58:51,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:58:51,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395149387] [2023-08-31 20:58:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:58:51,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:58:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:58:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 20:58:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:58:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395149387] [2023-08-31 20:58:51,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395149387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 20:58:51,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 20:58:51,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 20:58:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842967250] [2023-08-31 20:58:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 20:58:51,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 20:58:51,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:58:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 20:58:51,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 20:58:51,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 407 out of 735 [2023-08-31 20:58:51,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 262 transitions, 554 flow. Second operand has 3 states, 3 states have (on average 409.3333333333333) internal successors, (1228), 3 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:58:51,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:58:51,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 407 of 735 [2023-08-31 20:58:51,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:00:13,377 INFO L130 PetriNetUnfolder]: 527334/976797 cut-off events. [2023-08-31 21:00:13,378 INFO L131 PetriNetUnfolder]: For 6152/7380 co-relation queries the response was YES. [2023-08-31 21:00:16,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1647553 conditions, 976797 events. 527334/976797 cut-off events. For 6152/7380 co-relation queries the response was YES. Maximal size of possible extension queue 18071. Compared 12610710 event pairs, 463987 based on Foata normal form. 113478/979478 useless extension candidates. Maximal degree in co-relation 258765. Up to 667748 conditions per place. [2023-08-31 21:00:17,991 INFO L137 encePairwiseOnDemand]: 689/735 looper letters, 65 selfloop transitions, 2 changer transitions 61/220 dead transitions. [2023-08-31 21:00:17,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 220 transitions, 652 flow [2023-08-31 21:00:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 21:00:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 21:00:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1356 transitions. [2023-08-31 21:00:17,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149659863945578 [2023-08-31 21:00:17,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1356 transitions. [2023-08-31 21:00:17,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1356 transitions. [2023-08-31 21:00:18,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:00:18,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1356 transitions. [2023-08-31 21:00:18,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:18,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:18,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:18,009 INFO L175 Difference]: Start difference. First operand has 214 places, 262 transitions, 554 flow. Second operand 3 states and 1356 transitions. [2023-08-31 21:00:18,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 220 transitions, 652 flow [2023-08-31 21:00:18,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 220 transitions, 652 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 21:00:18,018 INFO L231 Difference]: Finished difference. Result has 217 places, 159 transitions, 349 flow [2023-08-31 21:00:18,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=217, PETRI_TRANSITIONS=159} [2023-08-31 21:00:18,019 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, 3 predicate places. [2023-08-31 21:00:18,019 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 159 transitions, 349 flow [2023-08-31 21:00:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 409.3333333333333) internal successors, (1228), 3 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:00:18,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:00:18,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 21:00:18,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:00:18,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:00:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1687641713, now seen corresponding path program 1 times [2023-08-31 21:00:18,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:00:18,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361096726] [2023-08-31 21:00:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:00:18,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:00:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:00:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:00:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:00:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361096726] [2023-08-31 21:00:18,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361096726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:00:18,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636742492] [2023-08-31 21:00:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:00:18,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:00:18,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:00:18,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:00:18,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 21:00:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:00:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 21:00:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:00:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:00:18,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:00:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:00:18,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636742492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:00:18,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:00:18,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-31 21:00:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031513356] [2023-08-31 21:00:18,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:00:18,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 21:00:18,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:00:18,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 21:00:18,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 21:00:18,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 406 out of 735 [2023-08-31 21:00:18,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 159 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 407.85714285714283) internal successors, (2855), 7 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:18,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:00:18,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 406 of 735 [2023-08-31 21:00:18,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:00:34,736 INFO L130 PetriNetUnfolder]: 82531/159126 cut-off events. [2023-08-31 21:00:34,737 INFO L131 PetriNetUnfolder]: For 2491/2491 co-relation queries the response was YES. [2023-08-31 21:00:35,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268323 conditions, 159126 events. 82531/159126 cut-off events. For 2491/2491 co-relation queries the response was YES. Maximal size of possible extension queue 3301. Compared 1755469 event pairs, 73926 based on Foata normal form. 0/139028 useless extension candidates. Maximal degree in co-relation 268309. Up to 107376 conditions per place. [2023-08-31 21:00:35,779 INFO L137 encePairwiseOnDemand]: 732/735 looper letters, 65 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2023-08-31 21:00:35,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 162 transitions, 501 flow [2023-08-31 21:00:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 21:00:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 21:00:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2509 transitions. [2023-08-31 21:00:35,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689342403628118 [2023-08-31 21:00:35,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2509 transitions. [2023-08-31 21:00:35,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2509 transitions. [2023-08-31 21:00:35,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:00:35,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2509 transitions. [2023-08-31 21:00:35,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 418.1666666666667) internal successors, (2509), 6 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:35,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 735.0) internal successors, (5145), 7 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:35,831 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 735.0) internal successors, (5145), 7 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:35,831 INFO L175 Difference]: Start difference. First operand has 217 places, 159 transitions, 349 flow. Second operand 6 states and 2509 transitions. [2023-08-31 21:00:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 162 transitions, 501 flow [2023-08-31 21:00:35,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 162 transitions, 491 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 21:00:35,851 INFO L231 Difference]: Finished difference. Result has 168 places, 162 transitions, 375 flow [2023-08-31 21:00:35,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2023-08-31 21:00:35,854 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, -46 predicate places. [2023-08-31 21:00:35,854 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 375 flow [2023-08-31 21:00:35,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 407.85714285714283) internal successors, (2855), 7 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:35,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:00:35,855 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:00:35,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 21:00:36,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 21:00:36,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:00:36,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:00:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1694133391, now seen corresponding path program 2 times [2023-08-31 21:00:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:00:36,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657240007] [2023-08-31 21:00:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:00:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:00:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:00:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:00:36,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:00:36,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657240007] [2023-08-31 21:00:36,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657240007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 21:00:36,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949951920] [2023-08-31 21:00:36,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 21:00:36,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:00:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 21:00:36,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 21:00:36,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 21:00:36,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 21:00:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 21:00:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 21:00:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 21:00:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:00:36,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 21:00:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-31 21:00:36,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949951920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 21:00:36,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 21:00:36,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 21:00:36,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126734427] [2023-08-31 21:00:36,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 21:00:36,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 21:00:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:00:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 21:00:36,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-31 21:00:36,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 406 out of 735 [2023-08-31 21:00:36,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 162 transitions, 375 flow. Second operand has 13 states, 13 states have (on average 407.46153846153845) internal successors, (5297), 13 states have internal predecessors, (5297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:36,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:00:36,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 406 of 735 [2023-08-31 21:00:36,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 21:00:52,039 INFO L130 PetriNetUnfolder]: 82531/159132 cut-off events. [2023-08-31 21:00:52,040 INFO L131 PetriNetUnfolder]: For 1138/1138 co-relation queries the response was YES. [2023-08-31 21:00:52,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267799 conditions, 159132 events. 82531/159132 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 3301. Compared 1755892 event pairs, 73926 based on Foata normal form. 6/139041 useless extension candidates. Maximal degree in co-relation 267739. Up to 107376 conditions per place. [2023-08-31 21:00:53,192 INFO L137 encePairwiseOnDemand]: 732/735 looper letters, 65 selfloop transitions, 11 changer transitions 0/168 dead transitions. [2023-08-31 21:00:53,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 168 transitions, 563 flow [2023-08-31 21:00:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 21:00:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 21:00:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4954 transitions. [2023-08-31 21:00:53,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616780045351474 [2023-08-31 21:00:53,204 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4954 transitions. [2023-08-31 21:00:53,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4954 transitions. [2023-08-31 21:00:53,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 21:00:53,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4954 transitions. [2023-08-31 21:00:53,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 412.8333333333333) internal successors, (4954), 12 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:53,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 735.0) internal successors, (9555), 13 states have internal predecessors, (9555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:53,228 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 735.0) internal successors, (9555), 13 states have internal predecessors, (9555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:53,228 INFO L175 Difference]: Start difference. First operand has 168 places, 162 transitions, 375 flow. Second operand 12 states and 4954 transitions. [2023-08-31 21:00:53,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 168 transitions, 563 flow [2023-08-31 21:00:53,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 168 transitions, 549 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-31 21:00:53,233 INFO L231 Difference]: Finished difference. Result has 184 places, 168 transitions, 445 flow [2023-08-31 21:00:53,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=445, PETRI_PLACES=184, PETRI_TRANSITIONS=168} [2023-08-31 21:00:53,234 INFO L281 CegarLoopForPetriNet]: 214 programPoint places, -30 predicate places. [2023-08-31 21:00:53,234 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 168 transitions, 445 flow [2023-08-31 21:00:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 407.46153846153845) internal successors, (5297), 13 states have internal predecessors, (5297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:53,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:00:53,235 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-31 21:00:53,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 21:00:53,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 21:00:53,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:00:53,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:00:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1809730703, now seen corresponding path program 3 times [2023-08-31 21:00:53,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:00:53,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774682953] [2023-08-31 21:00:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:00:53,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:00:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:00:53,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 21:00:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 21:00:53,533 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 21:00:53,535 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 21:00:53,535 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 21:00:53,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 21:00:53,536 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-31 21:00:53,537 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 21:00:53,538 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 21:00:53,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 21:00:53,594 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 21:00:53,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 507 places, 576 transitions, 1196 flow [2023-08-31 21:00:53,891 INFO L130 PetriNetUnfolder]: 170/1320 cut-off events. [2023-08-31 21:00:53,892 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:00:53,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 1320 events. 170/1320 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8068 event pairs, 6 based on Foata normal form. 0/1089 useless extension candidates. Maximal degree in co-relation 955. Up to 32 conditions per place. [2023-08-31 21:00:53,941 INFO L82 GeneralOperation]: Start removeDead. Operand has 507 places, 576 transitions, 1196 flow [2023-08-31 21:00:53,955 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 507 places, 576 transitions, 1196 flow [2023-08-31 21:00:53,955 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 21:00:53,955 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 507 places, 576 transitions, 1196 flow [2023-08-31 21:00:53,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 507 places, 576 transitions, 1196 flow [2023-08-31 21:00:53,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 507 places, 576 transitions, 1196 flow [2023-08-31 21:00:54,220 INFO L130 PetriNetUnfolder]: 170/1320 cut-off events. [2023-08-31 21:00:54,221 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 21:00:54,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 1320 events. 170/1320 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8068 event pairs, 6 based on Foata normal form. 0/1089 useless extension candidates. Maximal degree in co-relation 955. Up to 32 conditions per place. [2023-08-31 21:00:54,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 234600 [2023-08-31 21:00:59,249 INFO L134 LiptonReduction]: Checked pairs total: 946189 [2023-08-31 21:00:59,249 INFO L136 LiptonReduction]: Total number of compositions: 319 [2023-08-31 21:00:59,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 21:00:59,252 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;@254ffbef, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 21:00:59,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 21:00:59,276 INFO L130 PetriNetUnfolder]: 61/336 cut-off events. [2023-08-31 21:00:59,276 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 21:00:59,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 21:00:59,276 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 21:00:59,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 21:00:59,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 21:00:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1521328923, now seen corresponding path program 1 times [2023-08-31 21:00:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 21:00:59,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733438150] [2023-08-31 21:00:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 21:00:59,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 21:00:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 21:00:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-31 21:00:59,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 21:00:59,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733438150] [2023-08-31 21:00:59,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733438150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 21:00:59,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 21:00:59,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 21:00:59,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911984758] [2023-08-31 21:00:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 21:00:59,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 21:00:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 21:00:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 21:00:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 21:00:59,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 496 out of 895 [2023-08-31 21:00:59,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 320 transitions, 684 flow. Second operand has 3 states, 3 states have (on average 498.6666666666667) internal successors, (1496), 3 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 21:00:59,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 21:00:59,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 496 of 895 [2023-08-31 21:00:59,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand