./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 11:09:15,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 11:09:15,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 11:09:15,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 11:09:15,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 11:09:15,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 11:09:15,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 11:09:15,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 11:09:15,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 11:09:15,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 11:09:15,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 11:09:15,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 11:09:15,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 11:09:15,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 11:09:15,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 11:09:15,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 11:09:15,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 11:09:15,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 11:09:15,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 11:09:15,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 11:09:15,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 11:09:15,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 11:09:15,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 11:09:15,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 11:09:15,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 11:09:15,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 11:09:15,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 11:09:15,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 11:09:15,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 11:09:15,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 11:09:15,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 11:09:15,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 11:09:15,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 11:09:15,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 11:09:15,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 11:09:15,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 11:09:15,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 11:09:15,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 11:09:15,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 11:09:15,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 11:09:15,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 11:09:15,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 11:09:15,301 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 11:09:15,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 11:09:15,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 11:09:15,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 11:09:15,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 11:09:15,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 11:09:15,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 11:09:15,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 11:09:15,305 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 11:09:15,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 11:09:15,306 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 11:09:15,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 11:09:15,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 11:09:15,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 11:09:15,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 11:09:15,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 11:09:15,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 11:09:15,307 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 11:09:15,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 11:09:15,308 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 11:09:15,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 11:09:15,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 11:09:15,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 11:09:15,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 11:09:15,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:09:15,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 11:09:15,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 11:09:15,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 11:09:15,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 11:09:15,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 11:09:15,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 11:09:15,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 11:09:15,311 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 11:09:15,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 11:09:15,311 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 11:09:15,311 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 11:09:15,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 11:09:15,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 11:09:15,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 11:09:15,671 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 11:09:15,671 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 11:09:15,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-09-01 11:09:16,854 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 11:09:17,125 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 11:09:17,125 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-09-01 11:09:17,136 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f568fd9/c5e30accc41c4578b804943fcaf6eaa5/FLAGd90c15f7d [2023-09-01 11:09:17,150 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f568fd9/c5e30accc41c4578b804943fcaf6eaa5 [2023-09-01 11:09:17,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 11:09:17,153 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 11:09:17,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 11:09:17,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 11:09:17,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 11:09:17,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8b351c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17, skipping insertion in model container [2023-09-01 11:09:17,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 11:09:17,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 11:09:17,521 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_73-funloop_hard_racefree.i[41323,41336] [2023-09-01 11:09:17,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:09:17,573 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 11:09:17,614 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_73-funloop_hard_racefree.i[41323,41336] [2023-09-01 11:09:17,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 11:09:17,687 INFO L208 MainTranslator]: Completed translation [2023-09-01 11:09:17,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17 WrapperNode [2023-09-01 11:09:17,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 11:09:17,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 11:09:17,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 11:09:17,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 11:09:17,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,758 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-09-01 11:09:17,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 11:09:17,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 11:09:17,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 11:09:17,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 11:09:17,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 11:09:17,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 11:09:17,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 11:09:17,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 11:09:17,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (1/1) ... [2023-09-01 11:09:17,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 11:09:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:17,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 11:09:17,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 11:09:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 11:09:17,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 11:09:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 11:09:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 11:09:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-09-01 11:09:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 11:09:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-09-01 11:09:17,897 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-09-01 11:09:17,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 11:09:17,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 11:09:17,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 11:09:17,899 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 11:09:18,056 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 11:09:18,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 11:09:18,323 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 11:09:18,329 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 11:09:18,329 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-09-01 11:09:18,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:09:18 BoogieIcfgContainer [2023-09-01 11:09:18,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 11:09:18,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 11:09:18,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 11:09:18,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 11:09:18,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 11:09:17" (1/3) ... [2023-09-01 11:09:18,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2882a6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:09:18, skipping insertion in model container [2023-09-01 11:09:18,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 11:09:17" (2/3) ... [2023-09-01 11:09:18,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2882a6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 11:09:18, skipping insertion in model container [2023-09-01 11:09:18,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 11:09:18" (3/3) ... [2023-09-01 11:09:18,338 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-09-01 11:09:18,344 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 11:09:18,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 11:09:18,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-09-01 11:09:18,352 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 11:09:18,407 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-09-01 11:09:18,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-09-01 11:09:18,556 INFO L130 PetriNetUnfolder]: 73/381 cut-off events. [2023-09-01 11:09:18,557 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-09-01 11:09:18,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 381 events. 73/381 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1706 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-09-01 11:09:18,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-09-01 11:09:18,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-09-01 11:09:18,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:18,591 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-09-01 11:09:18,594 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-09-01 11:09:18,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-09-01 11:09:18,642 INFO L130 PetriNetUnfolder]: 72/376 cut-off events. [2023-09-01 11:09:18,642 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:18,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 376 events. 72/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1659 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-09-01 11:09:18,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-09-01 11:09:21,049 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-09-01 11:09:21,049 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-09-01 11:09:21,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:21,063 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;@c5cc05f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:21,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:21,068 INFO L130 PetriNetUnfolder]: 15/53 cut-off events. [2023-09-01 11:09:21,068 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:21,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:21,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-09-01 11:09:21,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:21,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash -441889917, now seen corresponding path program 1 times [2023-09-01 11:09:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:21,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2282590] [2023-09-01 11:09:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:21,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:21,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2282590] [2023-09-01 11:09:21,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2282590] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:21,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:21,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:21,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177189634] [2023-09-01 11:09:21,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:21,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:21,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:21,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 430 [2023-09-01 11:09:21,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:21,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 430 [2023-09-01 11:09:21,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:21,469 INFO L130 PetriNetUnfolder]: 579/1212 cut-off events. [2023-09-01 11:09:21,469 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:21,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6864 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-09-01 11:09:21,473 INFO L137 encePairwiseOnDemand]: 396/430 looper letters, 22 selfloop transitions, 2 changer transitions 37/66 dead transitions. [2023-09-01 11:09:21,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-09-01 11:09:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:09:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:09:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-09-01 11:09:21,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286821705426357 [2023-09-01 11:09:21,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-09-01 11:09:21,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-09-01 11:09:21,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:21,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-09-01 11:09:21,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,497 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 682 transitions. [2023-09-01 11:09:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-09-01 11:09:21,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:09:21,501 INFO L231 Difference]: Finished difference. Result has 65 places, 29 transitions, 73 flow [2023-09-01 11:09:21,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=65, PETRI_TRANSITIONS=29} [2023-09-01 11:09:21,504 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-09-01 11:09:21,504 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 29 transitions, 73 flow [2023-09-01 11:09:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:21,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:21,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 11:09:21,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:21,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-09-01 11:09:21,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:21,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057664546] [2023-09-01 11:09:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:21,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057664546] [2023-09-01 11:09:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057664546] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734860259] [2023-09-01 11:09:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:21,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:09:21,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 11:09:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:09:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:21,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:21,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734860259] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:21,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:09:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532989426] [2023-09-01 11:09:21,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:21,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:09:21,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:09:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:09:21,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-09-01 11:09:21,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:21,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-09-01 11:09:21,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:21,775 INFO L130 PetriNetUnfolder]: 54/139 cut-off events. [2023-09-01 11:09:21,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 11:09:21,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 139 events. 54/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 379 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 265. Up to 119 conditions per place. [2023-09-01 11:09:21,777 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-09-01 11:09:21,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 139 flow [2023-09-01 11:09:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:09:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:09:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1218 transitions. [2023-09-01 11:09:21,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2023-09-01 11:09:21,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1218 transitions. [2023-09-01 11:09:21,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1218 transitions. [2023-09-01 11:09:21,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:21,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1218 transitions. [2023-09-01 11:09:21,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.0) internal successors, (1218), 6 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,808 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,809 INFO L175 Difference]: Start difference. First operand has 65 places, 29 transitions, 73 flow. Second operand 6 states and 1218 transitions. [2023-09-01 11:09:21,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 139 flow [2023-09-01 11:09:21,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:21,810 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-09-01 11:09:21,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-09-01 11:09:21,811 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -25 predicate places. [2023-09-01 11:09:21,812 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-09-01 11:09:21,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.57142857142858) internal successors, (1397), 7 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:21,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:21,813 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:21,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 11:09:22,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:22,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:22,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-09-01 11:09:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:22,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75260902] [2023-09-01 11:09:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:22,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75260902] [2023-09-01 11:09:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75260902] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:22,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495619642] [2023-09-01 11:09:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:09:22,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:22,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:22,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:09:22,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 11:09:22,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:09:22,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:09:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:09:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:22,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 11:09:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495619642] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:22,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:09:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907678109] [2023-09-01 11:09:22,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:09:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:09:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:09:22,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 430 [2023-09-01 11:09:22,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:22,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:22,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 430 [2023-09-01 11:09:22,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:22,476 INFO L130 PetriNetUnfolder]: 54/145 cut-off events. [2023-09-01 11:09:22,477 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-09-01 11:09:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 145 events. 54/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 45 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 256. Up to 119 conditions per place. [2023-09-01 11:09:22,478 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 22 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-09-01 11:09:22,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 207 flow [2023-09-01 11:09:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:09:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:09:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2415 transitions. [2023-09-01 11:09:22,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2023-09-01 11:09:22,482 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2415 transitions. [2023-09-01 11:09:22,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2415 transitions. [2023-09-01 11:09:22,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:22,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2415 transitions. [2023-09-01 11:09:22,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 201.25) internal successors, (2415), 12 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:22,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:22,495 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:22,495 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 2415 transitions. [2023-09-01 11:09:22,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 207 flow [2023-09-01 11:09:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 193 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:22,497 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-09-01 11:09:22,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-09-01 11:09:22,498 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-09-01 11:09:22,498 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-09-01 11:09:22,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 199.30769230769232) internal successors, (2591), 13 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:22,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:22,499 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:22,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 11:09:22,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-09-01 11:09:22,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:22,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-09-01 11:09:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:22,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447899585] [2023-09-01 11:09:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:22,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:22,724 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:09:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:22,749 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:09:22,749 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:09:22,750 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:09:22,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 11:09:22,751 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:09:22,753 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:09:22,753 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:09:22,753 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-09-01 11:09:22,772 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 11:09:22,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-09-01 11:09:22,829 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-09-01 11:09:22,830 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:09:22,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-09-01 11:09:22,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-09-01 11:09:22,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-09-01 11:09:22,840 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:22,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-09-01 11:09:22,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-09-01 11:09:22,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-09-01 11:09:22,881 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-09-01 11:09:22,882 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-09-01 11:09:22,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-09-01 11:09:22,904 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-09-01 11:09:25,975 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-09-01 11:09:25,975 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-09-01 11:09:25,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:25,984 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;@c5cc05f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:25,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:25,996 INFO L130 PetriNetUnfolder]: 52/154 cut-off events. [2023-09-01 11:09:25,996 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 11:09:25,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:25,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:25,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:25,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 265766007, now seen corresponding path program 1 times [2023-09-01 11:09:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:25,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481351134] [2023-09-01 11:09:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:25,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:26,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:26,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481351134] [2023-09-01 11:09:26,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481351134] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:26,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:26,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:26,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234934681] [2023-09-01 11:09:26,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:26,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:26,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:26,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:26,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:26,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 559 [2023-09-01 11:09:26,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:26,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:26,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 559 [2023-09-01 11:09:26,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:28,487 INFO L130 PetriNetUnfolder]: 19961/30642 cut-off events. [2023-09-01 11:09:28,488 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-09-01 11:09:28,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 212680 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-09-01 11:09:28,566 INFO L137 encePairwiseOnDemand]: 516/559 looper letters, 40 selfloop transitions, 2 changer transitions 42/93 dead transitions. [2023-09-01 11:09:28,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-09-01 11:09:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:09:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:09:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 881 transitions. [2023-09-01 11:09:28,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253428741800835 [2023-09-01 11:09:28,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 881 transitions. [2023-09-01 11:09:28,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 881 transitions. [2023-09-01 11:09:28,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:28,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 881 transitions. [2023-09-01 11:09:28,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:28,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:28,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:28,579 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 881 transitions. [2023-09-01 11:09:28,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-09-01 11:09:28,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:09:28,584 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 124 flow [2023-09-01 11:09:28,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2023-09-01 11:09:28,585 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-09-01 11:09:28,586 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 124 flow [2023-09-01 11:09:28,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.0) internal successors, (771), 3 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:28,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:28,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 11:09:28,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:28,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1272874103, now seen corresponding path program 1 times [2023-09-01 11:09:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:28,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558960245] [2023-09-01 11:09:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:28,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:28,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558960245] [2023-09-01 11:09:28,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558960245] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:28,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995826044] [2023-09-01 11:09:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:28,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:28,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:09:28,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 11:09:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:28,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:09:28,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:28,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995826044] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:28,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:09:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367434413] [2023-09-01 11:09:28,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:09:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:09:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:09:28,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-09-01 11:09:28,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:28,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:28,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-09-01 11:09:28,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:29,104 INFO L130 PetriNetUnfolder]: 2090/3401 cut-off events. [2023-09-01 11:09:29,104 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-09-01 11:09:29,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 3401 events. 2090/3401 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18278 event pairs, 1833 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-09-01 11:09:29,123 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-09-01 11:09:29,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-09-01 11:09:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:09:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:09:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1572 transitions. [2023-09-01 11:09:29,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46869409660107336 [2023-09-01 11:09:29,133 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1572 transitions. [2023-09-01 11:09:29,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1572 transitions. [2023-09-01 11:09:29,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:29,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1572 transitions. [2023-09-01 11:09:29,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 262.0) internal successors, (1572), 6 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,143 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,144 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 124 flow. Second operand 6 states and 1572 transitions. [2023-09-01 11:09:29,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-09-01 11:09:29,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:29,146 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-09-01 11:09:29,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-09-01 11:09:29,150 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-09-01 11:09:29,150 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-09-01 11:09:29,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:29,151 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:29,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 11:09:29,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:29,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:29,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2007450743, now seen corresponding path program 2 times [2023-09-01 11:09:29,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:29,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565404687] [2023-09-01 11:09:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:29,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:29,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565404687] [2023-09-01 11:09:29,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565404687] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:09:29,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882547678] [2023-09-01 11:09:29,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:09:29,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:29,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:09:29,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:09:29,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 11:09:29,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:09:29,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:09:29,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:09:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:09:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:29,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:09:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-09-01 11:09:29,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882547678] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:09:29,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:09:29,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:09:29,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097124234] [2023-09-01 11:09:29,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:09:29,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:09:29,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:09:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:09:29,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 559 [2023-09-01 11:09:29,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 255.3846153846154) internal successors, (3320), 13 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:29,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 559 [2023-09-01 11:09:29,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:09:29,913 INFO L130 PetriNetUnfolder]: 2090/3407 cut-off events. [2023-09-01 11:09:29,913 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-09-01 11:09:29,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 3407 events. 2090/3407 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18322 event pairs, 1833 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-09-01 11:09:29,968 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-09-01 11:09:29,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-09-01 11:09:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:09:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:09:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3105 transitions. [2023-09-01 11:09:29,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46288014311270126 [2023-09-01 11:09:29,974 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3105 transitions. [2023-09-01 11:09:29,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3105 transitions. [2023-09-01 11:09:29,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:09:29,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3105 transitions. [2023-09-01 11:09:29,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 258.75) internal successors, (3105), 12 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,988 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 559.0) internal successors, (7267), 13 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,989 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 3105 transitions. [2023-09-01 11:09:29,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-09-01 11:09:29,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:09:29,991 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-09-01 11:09:29,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-09-01 11:09:29,991 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -11 predicate places. [2023-09-01 11:09:29,991 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-09-01 11:09:29,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 255.3846153846154) internal successors, (3320), 13 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:29,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:29,993 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-09-01 11:09:30,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 11:09:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:09:30,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:30,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:30,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 3 times [2023-09-01 11:09:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:30,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419118715] [2023-09-01 11:09:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:30,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:30,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:09:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:09:30,226 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:09:30,227 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:09:30,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:09:30,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 11:09:30,227 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:09:30,228 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:09:30,228 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:09:30,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-09-01 11:09:30,252 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 11:09:30,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-09-01 11:09:30,344 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-09-01 11:09:30,345 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:09:30,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-09-01 11:09:30,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 388 transitions, 806 flow [2023-09-01 11:09:30,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 388 transitions, 806 flow [2023-09-01 11:09:30,365 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:09:30,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 388 transitions, 806 flow [2023-09-01 11:09:30,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 388 transitions, 806 flow [2023-09-01 11:09:30,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-09-01 11:09:30,452 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-09-01 11:09:30,452 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-09-01 11:09:30,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-09-01 11:09:30,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 89838 [2023-09-01 11:09:33,786 INFO L134 LiptonReduction]: Checked pairs total: 142134 [2023-09-01 11:09:33,786 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-09-01 11:09:33,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:09:33,788 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;@c5cc05f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:09:33,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:09:33,806 INFO L130 PetriNetUnfolder]: 91/253 cut-off events. [2023-09-01 11:09:33,806 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-09-01 11:09:33,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:09:33,807 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:09:33,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:09:33,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:09:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 417231055, now seen corresponding path program 1 times [2023-09-01 11:09:33,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:09:33,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528685803] [2023-09-01 11:09:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:09:33,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:09:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:09:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:09:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:09:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528685803] [2023-09-01 11:09:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528685803] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:09:33,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:09:33,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:09:33,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624141663] [2023-09-01 11:09:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:09:33,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:09:33,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:09:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:09:33,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:09:33,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 682 [2023-09-01 11:09:33,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:09:33,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:09:33,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 682 [2023-09-01 11:09:33,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:14,778 INFO L130 PetriNetUnfolder]: 477490/661421 cut-off events. [2023-09-01 11:10:14,779 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-09-01 11:10:15,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274279 conditions, 661421 events. 477490/661421 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14829. Compared 5287189 event pairs, 422085 based on Foata normal form. 116547/658008 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-09-01 11:10:16,531 INFO L137 encePairwiseOnDemand]: 628/682 looper letters, 57 selfloop transitions, 2 changer transitions 43/115 dead transitions. [2023-09-01 11:10:16,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-09-01 11:10:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 11:10:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 11:10:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1078 transitions. [2023-09-01 11:10:16,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-09-01 11:10:16,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1078 transitions. [2023-09-01 11:10:16,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1078 transitions. [2023-09-01 11:10:16,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:16,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1078 transitions. [2023-09-01 11:10:16,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.3333333333333) internal successors, (1078), 3 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:16,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:16,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:16,539 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1078 transitions. [2023-09-01 11:10:16,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-09-01 11:10:16,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 11:10:16,542 INFO L231 Difference]: Finished difference. Result has 111 places, 72 transitions, 175 flow [2023-09-01 11:10:16,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=111, PETRI_TRANSITIONS=72} [2023-09-01 11:10:16,543 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-09-01 11:10:16,543 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 72 transitions, 175 flow [2023-09-01 11:10:16,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:16,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:16,544 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 11:10:16,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:16,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1916916671, now seen corresponding path program 1 times [2023-09-01 11:10:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738635368] [2023-09-01 11:10:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:16,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:16,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738635368] [2023-09-01 11:10:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738635368] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:16,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146646127] [2023-09-01 11:10:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:16,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:16,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:16,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:10:16,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 11:10:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-09-01 11:10:16,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:16,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146646127] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:16,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:16,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-09-01 11:10:16,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104725507] [2023-09-01 11:10:16,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:16,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 11:10:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 11:10:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-09-01 11:10:16,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-09-01 11:10:16,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 311.85714285714283) internal successors, (2183), 7 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:16,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:16,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-09-01 11:10:16,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:20,609 INFO L130 PetriNetUnfolder]: 52726/74726 cut-off events. [2023-09-01 11:10:20,610 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2023-09-01 11:10:20,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144813 conditions, 74726 events. 52726/74726 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 500650 event pairs, 46777 based on Foata normal form. 0/59675 useless extension candidates. Maximal degree in co-relation 144799. Up to 68679 conditions per place. [2023-09-01 11:10:20,928 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-09-01 11:10:20,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-09-01 11:10:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 11:10:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 11:10:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1925 transitions. [2023-09-01 11:10:20,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47043010752688175 [2023-09-01 11:10:20,932 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1925 transitions. [2023-09-01 11:10:20,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1925 transitions. [2023-09-01 11:10:20,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:20,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1925 transitions. [2023-09-01 11:10:20,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.8333333333333) internal successors, (1925), 6 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:20,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:20,940 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:20,940 INFO L175 Difference]: Start difference. First operand has 111 places, 72 transitions, 175 flow. Second operand 6 states and 1925 transitions. [2023-09-01 11:10:20,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-09-01 11:10:20,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 301 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:20,943 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-09-01 11:10:20,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-09-01 11:10:20,943 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -27 predicate places. [2023-09-01 11:10:20,944 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-09-01 11:10:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 311.85714285714283) internal successors, (2183), 7 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:20,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:20,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:20,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 11:10:21,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-09-01 11:10:21,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:21,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash 135769295, now seen corresponding path program 2 times [2023-09-01 11:10:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:21,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386942012] [2023-09-01 11:10:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:21,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:21,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386942012] [2023-09-01 11:10:21,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386942012] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 11:10:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687551078] [2023-09-01 11:10:21,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 11:10:21,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:21,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 11:10:21,218 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 11:10:21,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 11:10:21,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 11:10:21,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 11:10:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 11:10:21,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 11:10:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:21,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 11:10:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-09-01 11:10:21,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687551078] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 11:10:21,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 11:10:21,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-09-01 11:10:21,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433335961] [2023-09-01 11:10:21,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 11:10:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-09-01 11:10:21,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-09-01 11:10:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-09-01 11:10:21,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-09-01 11:10:21,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 311.46153846153845) internal successors, (4049), 13 states have internal predecessors, (4049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:21,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:21,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-09-01 11:10:21,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 11:10:26,728 INFO L130 PetriNetUnfolder]: 52726/74732 cut-off events. [2023-09-01 11:10:26,728 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-09-01 11:10:26,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144410 conditions, 74732 events. 52726/74732 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 500798 event pairs, 46777 based on Foata normal form. 6/59688 useless extension candidates. Maximal degree in co-relation 144350. Up to 68679 conditions per place. [2023-09-01 11:10:27,174 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-09-01 11:10:27,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-09-01 11:10:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 11:10:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 11:10:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3794 transitions. [2023-09-01 11:10:27,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46358748778103614 [2023-09-01 11:10:27,185 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3794 transitions. [2023-09-01 11:10:27,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3794 transitions. [2023-09-01 11:10:27,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 11:10:27,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3794 transitions. [2023-09-01 11:10:27,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 316.1666666666667) internal successors, (3794), 12 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:27,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:27,206 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 682.0) internal successors, (8866), 13 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:27,207 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3794 transitions. [2023-09-01 11:10:27,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-09-01 11:10:27,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 359 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-09-01 11:10:27,209 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-09-01 11:10:27,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=271, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-09-01 11:10:27,210 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -11 predicate places. [2023-09-01 11:10:27,211 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-09-01 11:10:27,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 311.46153846153845) internal successors, (4049), 13 states have internal predecessors, (4049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:27,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:27,212 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:27,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 11:10:27,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 11:10:27,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:27,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash 562120399, now seen corresponding path program 3 times [2023-09-01 11:10:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:27,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80293623] [2023-09-01 11:10:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:27,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-09-01 11:10:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-09-01 11:10:27,655 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-09-01 11:10:27,655 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-09-01 11:10:27,655 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-09-01 11:10:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 11:10:27,655 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-09-01 11:10:27,656 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-09-01 11:10:27,656 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-09-01 11:10:27,656 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-09-01 11:10:27,714 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 11:10:27,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-09-01 11:10:27,873 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-09-01 11:10:27,873 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:10:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-09-01 11:10:27,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 459 transitions, 962 flow [2023-09-01 11:10:27,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 459 transitions, 962 flow [2023-09-01 11:10:27,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 11:10:27,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 459 transitions, 962 flow [2023-09-01 11:10:27,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 459 transitions, 962 flow [2023-09-01 11:10:27,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-09-01 11:10:28,064 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-09-01 11:10:28,064 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-09-01 11:10:28,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-09-01 11:10:28,150 INFO L119 LiptonReduction]: Number of co-enabled transitions 139656 [2023-09-01 11:10:31,676 INFO L134 LiptonReduction]: Checked pairs total: 247744 [2023-09-01 11:10:31,677 INFO L136 LiptonReduction]: Total number of compositions: 348 [2023-09-01 11:10:31,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-09-01 11:10:31,682 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;@c5cc05f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 11:10:31,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-09-01 11:10:31,704 INFO L130 PetriNetUnfolder]: 130/357 cut-off events. [2023-09-01 11:10:31,704 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-09-01 11:10:31,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 11:10:31,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 11:10:31,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 11:10:31,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 11:10:31,706 INFO L85 PathProgramCache]: Analyzing trace with hash 711047105, now seen corresponding path program 1 times [2023-09-01 11:10:31,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 11:10:31,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417128483] [2023-09-01 11:10:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 11:10:31,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 11:10:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 11:10:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-09-01 11:10:31,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 11:10:31,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417128483] [2023-09-01 11:10:31,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417128483] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 11:10:31,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 11:10:31,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 11:10:31,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785861380] [2023-09-01 11:10:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 11:10:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 11:10:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 11:10:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 11:10:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 11:10:31,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 807 [2023-09-01 11:10:31,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 11:10:31,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 11:10:31,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 807 [2023-09-01 11:10:31,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand