./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.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 3a1634bb3c8fd20e3116589f39b7439eb06d3d5864b5afee415eff1cf39cd7c4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:13:50,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:13:50,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:13:50,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:13:50,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:13:50,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:13:50,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:13:50,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:13:50,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:13:50,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:13:50,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:13:50,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:13:50,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:13:50,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:13:50,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:13:50,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:13:50,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:13:50,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:13:50,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:13:50,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:13:50,170 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:13:50,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:13:50,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:13:50,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:13:50,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:13:50,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:13:50,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:13:50,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:13:50,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:13:50,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:13:50,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:13:50,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:13:50,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:13:50,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:13:50,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:13:50,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:13:50,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:13:50,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:13:50,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:13:50,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:13:50,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:13:50,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:13:50,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:13:50,225 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:13:50,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:13:50,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:13:50,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:13:50,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:13:50,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:13:50,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:13:50,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:13:50,233 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:13:50,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:13:50,233 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:13:50,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:13:50,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:13:50,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:13:50,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:13:50,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:13:50,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:13:50,234 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:13:50,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:13:50,235 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:13:50,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:13:50,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:13:50,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:13:50,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:13:50,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:50,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:13:50,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:13:50,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:13:50,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:13:50,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:13:50,236 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:13:50,237 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:13:50,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:13:50,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1634bb3c8fd20e3116589f39b7439eb06d3d5864b5afee415eff1cf39cd7c4 [2022-07-19 21:13:50,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:13:50,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:13:50,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:13:50,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:13:50,493 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:13:50,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i [2022-07-19 21:13:50,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba77acf0/b387c33bf8614bbe83247d06d63a787d/FLAGf56647b27 [2022-07-19 21:13:51,017 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:13:51,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i [2022-07-19 21:13:51,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba77acf0/b387c33bf8614bbe83247d06d63a787d/FLAGf56647b27 [2022-07-19 21:13:51,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba77acf0/b387c33bf8614bbe83247d06d63a787d [2022-07-19 21:13:51,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:13:51,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:13:51,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:51,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:13:51,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:13:51,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfb654b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51, skipping insertion in model container [2022-07-19 21:13:51,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:13:51,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:13:51,552 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[76469,76482] [2022-07-19 21:13:51,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79042,79055] [2022-07-19 21:13:51,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79451,79464] [2022-07-19 21:13:51,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:51,631 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:13:51,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[76469,76482] [2022-07-19 21:13:51,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79042,79055] [2022-07-19 21:13:51,680 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-1.i[79451,79464] [2022-07-19 21:13:51,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:51,771 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:13:51,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51 WrapperNode [2022-07-19 21:13:51,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:51,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:51,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:13:51,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:13:51,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,869 INFO L137 Inliner]: procedures = 489, calls = 128, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1729 [2022-07-19 21:13:51,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:51,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:13:51,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:13:51,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:13:51,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:51,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:52,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:52,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:52,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:52,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:13:52,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:13:52,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:13:52,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:13:52,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (1/1) ... [2022-07-19 21:13:52,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:13:52,098 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) [2022-07-19 21:13:52,102 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 [2022-07-19 21:13:52,153 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2022-07-19 21:13:52,154 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2022-07-19 21:13:52,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:13:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:13:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:13:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:13:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:13:52,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:13:52,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:13:52,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:13:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:13:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:13:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:13:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:13:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:13:52,161 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:13:52,408 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:13:52,409 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:13:53,530 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:13:53,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:13:53,741 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-19 21:13:53,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:53 BoogieIcfgContainer [2022-07-19 21:13:53,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:13:53,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:13:53,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:13:53,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:13:53,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:13:51" (1/3) ... [2022-07-19 21:13:53,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483846b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:53, skipping insertion in model container [2022-07-19 21:13:53,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:51" (2/3) ... [2022-07-19 21:13:53,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483846b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:53, skipping insertion in model container [2022-07-19 21:13:53,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:53" (3/3) ... [2022-07-19 21:13:53,750 INFO L111 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-1.i [2022-07-19 21:13:53,754 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:13:53,760 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:13:53,760 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-19 21:13:53,761 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:13:53,837 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:13:53,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-19 21:13:54,550 INFO L129 PetriNetUnfolder]: 97/3125 cut-off events. [2022-07-19 21:13:54,551 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:13:54,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 3125 events. 97/3125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14514 event pairs, 0 based on Foata normal form. 0/3015 useless extension candidates. Maximal degree in co-relation 1594. Up to 10 conditions per place. [2022-07-19 21:13:54,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 1635 places, 1684 transitions, 3376 flow [2022-07-19 21:13:54,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1635 places, 1684 transitions, 3376 flow [2022-07-19 21:13:54,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:54,615 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2fd9e6d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5008905a [2022-07-19 21:13:54,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:13:54,627 INFO L129 PetriNetUnfolder]: 11/171 cut-off events. [2022-07-19 21:13:54,628 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:13:54,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:54,629 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:54,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1789532269, now seen corresponding path program 1 times [2022-07-19 21:13:54,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986892622] [2022-07-19 21:13:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:13:54,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:54,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986892622] [2022-07-19 21:13:54,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986892622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:54,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:54,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:13:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509082777] [2022-07-19 21:13:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:54,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:13:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:13:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:13:54,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1611 out of 1684 [2022-07-19 21:13:54,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 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) [2022-07-19 21:13:54,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:54,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1611 of 1684 [2022-07-19 21:13:54,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:56,833 INFO L129 PetriNetUnfolder]: 384/9309 cut-off events. [2022-07-19 21:13:56,834 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:13:56,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9783 conditions, 9309 events. 384/9309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 79211 event pairs, 176 based on Foata normal form. 161/9221 useless extension candidates. Maximal degree in co-relation 8217. Up to 468 conditions per place. [2022-07-19 21:13:56,897 INFO L132 encePairwiseOnDemand]: 1668/1684 looper letters, 52 selfloop transitions, 0 changer transitions 0/1663 dead transitions. [2022-07-19 21:13:56,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1631 places, 1663 transitions, 3438 flow [2022-07-19 21:13:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:13:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:13:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3290 transitions. [2022-07-19 21:13:56,915 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768408551068883 [2022-07-19 21:13:56,916 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3290 transitions. [2022-07-19 21:13:56,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3290 transitions. [2022-07-19 21:13:56,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:56,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3290 transitions. [2022-07-19 21:13:56,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1645.0) internal successors, (3290), 2 states have internal predecessors, (3290), 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) [2022-07-19 21:13:56,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 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) [2022-07-19 21:13:56,943 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 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) [2022-07-19 21:13:56,945 INFO L186 Difference]: Start difference. First operand has 1635 places, 1684 transitions, 3376 flow. Second operand 2 states and 3290 transitions. [2022-07-19 21:13:56,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1631 places, 1663 transitions, 3438 flow [2022-07-19 21:13:56,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1631 places, 1663 transitions, 3438 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:56,976 INFO L242 Difference]: Finished difference. Result has 1631 places, 1663 transitions, 3334 flow [2022-07-19 21:13:56,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3334, PETRI_PLACES=1631, PETRI_TRANSITIONS=1663} [2022-07-19 21:13:56,983 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -4 predicate places. [2022-07-19 21:13:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 1631 places, 1663 transitions, 3334 flow [2022-07-19 21:13:56,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1613.0) internal successors, (3226), 2 states have internal predecessors, (3226), 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) [2022-07-19 21:13:56,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:56,985 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:56,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:13:56,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:13:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1152125330, now seen corresponding path program 1 times [2022-07-19 21:13:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755612520] [2022-07-19 21:13:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:56,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:13:57,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:57,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755612520] [2022-07-19 21:13:57,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755612520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:57,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:57,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:13:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769390699] [2022-07-19 21:13:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:57,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:13:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:13:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:13:57,081 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1573 out of 1684 [2022-07-19 21:13:57,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 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) [2022-07-19 21:13:57,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:57,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1573 of 1684 [2022-07-19 21:13:57,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:00,995 INFO L129 PetriNetUnfolder]: 751/14656 cut-off events. [2022-07-19 21:14:00,996 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:14:01,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15742 conditions, 14656 events. 751/14656 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 130291 event pairs, 224 based on Foata normal form. 0/14284 useless extension candidates. Maximal degree in co-relation 15738. Up to 553 conditions per place. [2022-07-19 21:14:01,085 INFO L132 encePairwiseOnDemand]: 1666/1684 looper letters, 143 selfloop transitions, 12 changer transitions 9/1731 dead transitions. [2022-07-19 21:14:01,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1633 places, 1731 transitions, 3786 flow [2022-07-19 21:14:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:14:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:14:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4883 transitions. [2022-07-19 21:14:01,093 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.966547901821061 [2022-07-19 21:14:01,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 4883 transitions. [2022-07-19 21:14:01,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 4883 transitions. [2022-07-19 21:14:01,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:01,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 4883 transitions. [2022-07-19 21:14:01,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1627.6666666666667) internal successors, (4883), 3 states have internal predecessors, (4883), 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) [2022-07-19 21:14:01,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 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) [2022-07-19 21:14:01,113 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1684.0) internal successors, (6736), 4 states have internal predecessors, (6736), 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) [2022-07-19 21:14:01,113 INFO L186 Difference]: Start difference. First operand has 1631 places, 1663 transitions, 3334 flow. Second operand 3 states and 4883 transitions. [2022-07-19 21:14:01,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1633 places, 1731 transitions, 3786 flow [2022-07-19 21:14:01,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1633 places, 1731 transitions, 3786 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:14:01,135 INFO L242 Difference]: Finished difference. Result has 1634 places, 1660 transitions, 3382 flow [2022-07-19 21:14:01,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=1631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3382, PETRI_PLACES=1634, PETRI_TRANSITIONS=1660} [2022-07-19 21:14:01,138 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, -1 predicate places. [2022-07-19 21:14:01,139 INFO L495 AbstractCegarLoop]: Abstraction has has 1634 places, 1660 transitions, 3382 flow [2022-07-19 21:14:01,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1577.0) internal successors, (4731), 3 states have internal predecessors, (4731), 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) [2022-07-19 21:14:01,141 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:01,141 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:01,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:14:01,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 921428864, now seen corresponding path program 1 times [2022-07-19 21:14:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:01,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857793091] [2022-07-19 21:14:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:01,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:01,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857793091] [2022-07-19 21:14:01,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857793091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:14:01,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491956278] [2022-07-19 21:14:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:01,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:01,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:01,279 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) [2022-07-19 21:14:01,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:14:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:14:01,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:14:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:01,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:14:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:01,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491956278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:14:01,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:14:01,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:14:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115302408] [2022-07-19 21:14:01,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:14:01,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:14:01,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:14:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:14:01,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-19 21:14:01,612 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 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) [2022-07-19 21:14:01,612 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:01,612 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-19 21:14:01,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:05,679 INFO L129 PetriNetUnfolder]: 869/15024 cut-off events. [2022-07-19 21:14:05,679 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-19 21:14:05,755 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 15024 events. 869/15024 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 132378 event pairs, 174 based on Foata normal form. 2/14664 useless extension candidates. Maximal degree in co-relation 16312. Up to 577 conditions per place. [2022-07-19 21:14:05,779 INFO L132 encePairwiseOnDemand]: 1663/1684 looper letters, 141 selfloop transitions, 26 changer transitions 2/1735 dead transitions. [2022-07-19 21:14:05,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1635 places, 1735 transitions, 3872 flow [2022-07-19 21:14:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 21:14:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-19 21:14:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14319 transitions. [2022-07-19 21:14:05,798 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9447743467933492 [2022-07-19 21:14:05,798 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 14319 transitions. [2022-07-19 21:14:05,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14319 transitions. [2022-07-19 21:14:05,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:05,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 14319 transitions. [2022-07-19 21:14:05,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1591.0) internal successors, (14319), 9 states have internal predecessors, (14319), 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) [2022-07-19 21:14:05,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 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) [2022-07-19 21:14:05,841 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1684.0) internal successors, (16840), 10 states have internal predecessors, (16840), 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) [2022-07-19 21:14:05,841 INFO L186 Difference]: Start difference. First operand has 1634 places, 1660 transitions, 3382 flow. Second operand 9 states and 14319 transitions. [2022-07-19 21:14:05,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1635 places, 1735 transitions, 3872 flow [2022-07-19 21:14:05,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1634 places, 1735 transitions, 3860 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:14:05,863 INFO L242 Difference]: Finished difference. Result has 1637 places, 1670 transitions, 3496 flow [2022-07-19 21:14:05,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=1626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=1637, PETRI_TRANSITIONS=1670} [2022-07-19 21:14:05,865 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 2 predicate places. [2022-07-19 21:14:05,865 INFO L495 AbstractCegarLoop]: Abstraction has has 1637 places, 1670 transitions, 3496 flow [2022-07-19 21:14:05,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1574.9) internal successors, (15749), 10 states have internal predecessors, (15749), 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) [2022-07-19 21:14:05,868 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:05,869 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:05,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:14:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:06,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -613101020, now seen corresponding path program 2 times [2022-07-19 21:14:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118508266] [2022-07-19 21:14:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:06,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118508266] [2022-07-19 21:14:06,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118508266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:14:06,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552462016] [2022-07-19 21:14:06,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:14:06,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:14:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:06,220 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) [2022-07-19 21:14:06,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:14:06,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:14:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:14:06,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:14:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:14:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:06,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:14:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:14:06,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552462016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:14:06,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:14:06,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-19 21:14:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141349286] [2022-07-19 21:14:06,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:14:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:14:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:14:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:14:06,641 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1572 out of 1684 [2022-07-19 21:14:06,648 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 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) [2022-07-19 21:14:06,648 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:06,648 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1572 of 1684 [2022-07-19 21:14:06,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:11,426 INFO L129 PetriNetUnfolder]: 793/16490 cut-off events. [2022-07-19 21:14:11,427 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-19 21:14:11,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17857 conditions, 16490 events. 793/16490 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 148205 event pairs, 420 based on Foata normal form. 1/16097 useless extension candidates. Maximal degree in co-relation 17849. Up to 523 conditions per place. [2022-07-19 21:14:11,531 INFO L132 encePairwiseOnDemand]: 1664/1684 looper letters, 143 selfloop transitions, 29 changer transitions 0/1738 dead transitions. [2022-07-19 21:14:11,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1648 places, 1738 transitions, 3994 flow [2022-07-19 21:14:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:14:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:14:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 19037 transitions. [2022-07-19 21:14:11,557 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9420526524148852 [2022-07-19 21:14:11,558 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 19037 transitions. [2022-07-19 21:14:11,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 19037 transitions. [2022-07-19 21:14:11,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:11,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 19037 transitions. [2022-07-19 21:14:11,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 1586.4166666666667) internal successors, (19037), 12 states have internal predecessors, (19037), 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) [2022-07-19 21:14:11,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 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) [2022-07-19 21:14:11,623 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 1684.0) internal successors, (21892), 13 states have internal predecessors, (21892), 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) [2022-07-19 21:14:11,624 INFO L186 Difference]: Start difference. First operand has 1637 places, 1670 transitions, 3496 flow. Second operand 12 states and 19037 transitions. [2022-07-19 21:14:11,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1648 places, 1738 transitions, 3994 flow [2022-07-19 21:14:11,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1647 places, 1738 transitions, 3970 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:14:11,653 INFO L242 Difference]: Finished difference. Result has 1651 places, 1674 transitions, 3589 flow [2022-07-19 21:14:11,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1684, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=1636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3589, PETRI_PLACES=1651, PETRI_TRANSITIONS=1674} [2022-07-19 21:14:11,656 INFO L279 CegarLoopForPetriNet]: 1635 programPoint places, 16 predicate places. [2022-07-19 21:14:11,656 INFO L495 AbstractCegarLoop]: Abstraction has has 1651 places, 1674 transitions, 3589 flow [2022-07-19 21:14:11,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1574.909090909091) internal successors, (17324), 11 states have internal predecessors, (17324), 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) [2022-07-19 21:14:11,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:11,661 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:11,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:14:11,879 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,SelfDestructingSolverStorable3 [2022-07-19 21:14:11,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash 781063094, now seen corresponding path program 3 times [2022-07-19 21:14:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636806425] [2022-07-19 21:14:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:14:11,942 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:14:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:14:12,023 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:14:12,023 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:14:12,025 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:14:12,028 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:14:12,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:14:12,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:14:12,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:14:12,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:14:12,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:14:12,030 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-07-19 21:14:12,032 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:14:12,032 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:14:12,116 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:14:12,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-19 21:14:13,240 INFO L129 PetriNetUnfolder]: 152/4761 cut-off events. [2022-07-19 21:14:13,240 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:14:13,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 4761 events. 152/4761 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 27568 event pairs, 0 based on Foata normal form. 0/4589 useless extension candidates. Maximal degree in co-relation 3127. Up to 15 conditions per place. [2022-07-19 21:14:13,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 1782 places, 1834 transitions, 3686 flow [2022-07-19 21:14:13,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1782 places, 1834 transitions, 3686 flow [2022-07-19 21:14:13,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:14:13,354 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2fd9e6d5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5008905a [2022-07-19 21:14:13,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:14:13,362 INFO L129 PetriNetUnfolder]: 13/197 cut-off events. [2022-07-19 21:14:13,362 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:14:13,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:13,363 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:13,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:13,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1187252170, now seen corresponding path program 1 times [2022-07-19 21:14:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133882944] [2022-07-19 21:14:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:13,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:13,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133882944] [2022-07-19 21:14:13,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133882944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:13,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:13,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:14:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685557189] [2022-07-19 21:14:13,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:13,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:14:13,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:14:13,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:14:13,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1754 out of 1834 [2022-07-19 21:14:13,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand has 2 states, 2 states have (on average 1756.0) internal successors, (3512), 2 states have internal predecessors, (3512), 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) [2022-07-19 21:14:13,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:13,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1754 of 1834 [2022-07-19 21:14:13,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:25,820 INFO L129 PetriNetUnfolder]: 3062/49401 cut-off events. [2022-07-19 21:14:25,821 INFO L130 PetriNetUnfolder]: For 73/77 co-relation queries the response was YES. [2022-07-19 21:14:26,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52938 conditions, 49401 events. 3062/49401 cut-off events. For 73/77 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 640460 event pairs, 1964 based on Foata normal form. 1133/49213 useless extension candidates. Maximal degree in co-relation 9703. Up to 3491 conditions per place. [2022-07-19 21:14:26,380 INFO L132 encePairwiseOnDemand]: 1817/1834 looper letters, 58 selfloop transitions, 0 changer transitions 0/1812 dead transitions. [2022-07-19 21:14:26,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1778 places, 1812 transitions, 3758 flow [2022-07-19 21:14:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:14:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:14:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 3583 transitions. [2022-07-19 21:14:26,386 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9768266085059978 [2022-07-19 21:14:26,386 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 3583 transitions. [2022-07-19 21:14:26,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 3583 transitions. [2022-07-19 21:14:26,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:14:26,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 3583 transitions. [2022-07-19 21:14:26,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1791.5) internal successors, (3583), 2 states have internal predecessors, (3583), 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) [2022-07-19 21:14:26,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 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) [2022-07-19 21:14:26,394 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1834.0) internal successors, (5502), 3 states have internal predecessors, (5502), 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) [2022-07-19 21:14:26,394 INFO L186 Difference]: Start difference. First operand has 1782 places, 1834 transitions, 3686 flow. Second operand 2 states and 3583 transitions. [2022-07-19 21:14:26,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1778 places, 1812 transitions, 3758 flow [2022-07-19 21:14:26,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1778 places, 1812 transitions, 3758 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:14:26,420 INFO L242 Difference]: Finished difference. Result has 1778 places, 1812 transitions, 3642 flow [2022-07-19 21:14:26,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=3642, PETRI_PLACES=1778, PETRI_TRANSITIONS=1812} [2022-07-19 21:14:26,426 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -4 predicate places. [2022-07-19 21:14:26,429 INFO L495 AbstractCegarLoop]: Abstraction has has 1778 places, 1812 transitions, 3642 flow [2022-07-19 21:14:26,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1756.0) internal successors, (3512), 2 states have internal predecessors, (3512), 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) [2022-07-19 21:14:26,430 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:14:26,430 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:14:26,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:14:26,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:14:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:14:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -903102196, now seen corresponding path program 1 times [2022-07-19 21:14:26,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:14:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564293843] [2022-07-19 21:14:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:14:26,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:14:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:14:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:14:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:14:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564293843] [2022-07-19 21:14:26,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564293843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:14:26,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:14:26,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:14:26,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004640344] [2022-07-19 21:14:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:14:26,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:14:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:14:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:14:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:14:26,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1716 out of 1834 [2022-07-19 21:14:26,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 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) [2022-07-19 21:14:26,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:14:26,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1716 of 1834 [2022-07-19 21:14:26,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:14:59,271 INFO L129 PetriNetUnfolder]: 7534/98237 cut-off events. [2022-07-19 21:14:59,272 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-19 21:15:00,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107757 conditions, 98237 events. 7534/98237 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 1354653 event pairs, 3101 based on Foata normal form. 0/95615 useless extension candidates. Maximal degree in co-relation 107752. Up to 4939 conditions per place. [2022-07-19 21:15:00,522 INFO L132 encePairwiseOnDemand]: 1816/1834 looper letters, 162 selfloop transitions, 12 changer transitions 0/1890 dead transitions. [2022-07-19 21:15:00,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1780 places, 1890 transitions, 4152 flow [2022-07-19 21:15:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:15:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:15:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5328 transitions. [2022-07-19 21:15:00,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9683751363140676 [2022-07-19 21:15:00,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5328 transitions. [2022-07-19 21:15:00,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5328 transitions. [2022-07-19 21:15:00,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:00,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5328 transitions. [2022-07-19 21:15:00,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1776.0) internal successors, (5328), 3 states have internal predecessors, (5328), 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) [2022-07-19 21:15:00,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1834.0) internal successors, (7336), 4 states have internal predecessors, (7336), 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) [2022-07-19 21:15:00,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1834.0) internal successors, (7336), 4 states have internal predecessors, (7336), 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) [2022-07-19 21:15:00,540 INFO L186 Difference]: Start difference. First operand has 1778 places, 1812 transitions, 3642 flow. Second operand 3 states and 5328 transitions. [2022-07-19 21:15:00,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1780 places, 1890 transitions, 4152 flow [2022-07-19 21:15:00,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1780 places, 1890 transitions, 4152 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:00,561 INFO L242 Difference]: Finished difference. Result has 1781 places, 1818 transitions, 3714 flow [2022-07-19 21:15:00,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=1834, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=1778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3714, PETRI_PLACES=1781, PETRI_TRANSITIONS=1818} [2022-07-19 21:15:00,564 INFO L279 CegarLoopForPetriNet]: 1782 programPoint places, -1 predicate places. [2022-07-19 21:15:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 1781 places, 1818 transitions, 3714 flow [2022-07-19 21:15:00,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1721.6666666666667) internal successors, (5165), 3 states have internal predecessors, (5165), 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) [2022-07-19 21:15:00,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:00,565 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:00,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:15:00,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:15:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1501176274, now seen corresponding path program 1 times [2022-07-19 21:15:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643028076] [2022-07-19 21:15:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:00,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:15:00,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:00,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643028076] [2022-07-19 21:15:00,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643028076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:00,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771751445] [2022-07-19 21:15:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:00,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:00,624 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) [2022-07-19 21:15:00,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:15:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:15:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:15:00,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 21:15:00,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771751445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:00,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:00,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 21:15:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430256608] [2022-07-19 21:15:00,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 21:15:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 21:15:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 21:15:00,874 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 1715 out of 1834 [2022-07-19 21:15:00,893 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1781 places, 1818 transitions, 3714 flow. Second operand has 10 states, 10 states have (on average 1718.0) internal successors, (17180), 10 states have internal predecessors, (17180), 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) [2022-07-19 21:15:00,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:00,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1715 of 1834 [2022-07-19 21:15:00,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand