./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/bounded_buffer.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/bounded_buffer.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 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:13:38,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:13:38,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:13:38,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:13:38,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:13:38,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:13:38,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:13:38,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:13:38,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:13:38,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:13:38,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:13:38,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:13:38,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:13:38,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:13:38,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:13:38,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:13:38,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:13:38,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:13:38,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:13:38,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:13:38,583 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:13:38,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:13:38,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:13:38,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:13:38,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:13:38,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:13:38,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:13:38,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:13:38,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:13:38,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:13:38,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:13:38,599 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:13:38,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:13:38,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:13:38,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:13:38,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:13:38,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:13:38,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:13:38,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:13:38,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:13:38,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:13:38,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:13:38,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:13:38,638 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:13:38,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:13:38,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:13:38,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:13:38,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:13:38,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:13:38,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:13:38,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:13:38,641 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:13:38,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:13:38,642 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:13:38,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:13:38,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:13:38,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:13:38,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:13:38,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:13:38,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:13:38,643 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:13:38,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:13:38,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:13:38,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:13:38,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:13:38,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:13:38,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:13:38,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:38,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:13:38,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:13:38,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:13:38,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:13:38,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:13:38,646 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:13:38,646 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:13:38,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:13:38,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6780d9b269575eab8bb01b5a192a21fa771f6fcc4c495cab5abe1df10d7681d5 [2022-07-19 21:13:38,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:13:38,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:13:38,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:13:38,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:13:38,907 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:13:38,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-07-19 21:13:38,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6e4d5df/828ebb34b3ed4bc5af730d4474b6f5da/FLAGcf298cb35 [2022-07-19 21:13:39,479 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:13:39,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/bounded_buffer.i [2022-07-19 21:13:39,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6e4d5df/828ebb34b3ed4bc5af730d4474b6f5da/FLAGcf298cb35 [2022-07-19 21:13:39,758 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6e4d5df/828ebb34b3ed4bc5af730d4474b6f5da [2022-07-19 21:13:39,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:13:39,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:13:39,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:39,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:13:39,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:13:39,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:39" (1/1) ... [2022-07-19 21:13:39,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c53f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:39, skipping insertion in model container [2022-07-19 21:13:39,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:39" (1/1) ... [2022-07-19 21:13:39,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:13:39,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:13:40,381 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/bounded_buffer.i[70002,70015] [2022-07-19 21:13:40,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:40,418 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:13:40,487 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/bounded_buffer.i[70002,70015] [2022-07-19 21:13:40,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:40,613 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:13:40,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40 WrapperNode [2022-07-19 21:13:40,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:40,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:40,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:13:40,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:13:40,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,726 INFO L137 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 478 [2022-07-19 21:13:40,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:40,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:13:40,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:13:40,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:13:40,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:13:40,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:13:40,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:13:40,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:13:40,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (1/1) ... [2022-07-19 21:13:40,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:13:40,825 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 21:13:40,827 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 21:13:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2022-07-19 21:13:40,867 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2022-07-19 21:13:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:13:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:13:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:13:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:13:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2022-07-19 21:13:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:13:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:13:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:13:40,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:13:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:13:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:13:40,868 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2022-07-19 21:13:40,868 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2022-07-19 21:13:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:13:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:13:40,871 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 21:13:40,999 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:13:41,001 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:13:41,568 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:13:41,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:13:41,577 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-19 21:13:41,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:41 BoogieIcfgContainer [2022-07-19 21:13:41,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:13:41,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:13:41,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:13:41,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:13:41,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:13:39" (1/3) ... [2022-07-19 21:13:41,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5330626f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:41, skipping insertion in model container [2022-07-19 21:13:41,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:40" (2/3) ... [2022-07-19 21:13:41,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5330626f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:41, skipping insertion in model container [2022-07-19 21:13:41,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:41" (3/3) ... [2022-07-19 21:13:41,587 INFO L111 eAbstractionObserver]: Analyzing ICFG bounded_buffer.i [2022-07-19 21:13:41,591 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:13:41,599 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:13:41,600 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:13:41,600 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:13:41,702 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:13:41,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 455 places, 504 transitions, 1030 flow [2022-07-19 21:13:42,048 INFO L129 PetriNetUnfolder]: 122/1098 cut-off events. [2022-07-19 21:13:42,048 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:13:42,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1118 conditions, 1098 events. 122/1098 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6668 event pairs, 0 based on Foata normal form. 0/968 useless extension candidates. Maximal degree in co-relation 578. Up to 16 conditions per place. [2022-07-19 21:13:42,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 455 places, 504 transitions, 1030 flow [2022-07-19 21:13:42,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 455 places, 504 transitions, 1030 flow [2022-07-19 21:13:42,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:42,118 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@3648e82f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c854fbe [2022-07-19 21:13:42,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:13:42,154 INFO L129 PetriNetUnfolder]: 19/184 cut-off events. [2022-07-19 21:13:42,155 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:13:42,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:42,156 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-07-19 21:13:42,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:13:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:42,165 INFO L85 PathProgramCache]: Analyzing trace with hash 13293357, now seen corresponding path program 1 times [2022-07-19 21:13:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:42,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009234491] [2022-07-19 21:13:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 21:13:42,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:42,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009234491] [2022-07-19 21:13:42,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009234491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:42,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:42,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:13:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094122888] [2022-07-19 21:13:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:42,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:13:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:13:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:13:42,547 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 461 out of 504 [2022-07-19 21:13:42,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 504 transitions, 1030 flow. Second operand has 5 states, 5 states have (on average 462.6) internal successors, (2313), 5 states have internal predecessors, (2313), 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 21:13:42,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:42,562 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 461 of 504 [2022-07-19 21:13:42,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:42,900 INFO L129 PetriNetUnfolder]: 87/1060 cut-off events. [2022-07-19 21:13:42,900 INFO L130 PetriNetUnfolder]: For 33/49 co-relation queries the response was YES. [2022-07-19 21:13:42,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 1060 events. 87/1060 cut-off events. For 33/49 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6480 event pairs, 0 based on Foata normal form. 63/1028 useless extension candidates. Maximal degree in co-relation 571. Up to 39 conditions per place. [2022-07-19 21:13:42,927 INFO L132 encePairwiseOnDemand]: 487/504 looper letters, 25 selfloop transitions, 4 changer transitions 0/489 dead transitions. [2022-07-19 21:13:42,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 489 transitions, 1058 flow [2022-07-19 21:13:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:13:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:13:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2352 transitions. [2022-07-19 21:13:42,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2022-07-19 21:13:42,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2352 transitions. [2022-07-19 21:13:42,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2352 transitions. [2022-07-19 21:13:42,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:42,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2352 transitions. [2022-07-19 21:13:42,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 470.4) internal successors, (2352), 5 states have internal predecessors, (2352), 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 21:13:42,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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 21:13:42,978 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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 21:13:42,980 INFO L186 Difference]: Start difference. First operand has 455 places, 504 transitions, 1030 flow. Second operand 5 states and 2352 transitions. [2022-07-19 21:13:42,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 489 transitions, 1058 flow [2022-07-19 21:13:42,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 489 transitions, 1058 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:42,997 INFO L242 Difference]: Finished difference. Result has 457 places, 489 transitions, 1008 flow [2022-07-19 21:13:43,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1008, PETRI_PLACES=457, PETRI_TRANSITIONS=489} [2022-07-19 21:13:43,004 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, 2 predicate places. [2022-07-19 21:13:43,004 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 489 transitions, 1008 flow [2022-07-19 21:13:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 462.6) internal successors, (2313), 5 states have internal predecessors, (2313), 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 21:13:43,006 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:43,007 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-07-19 21:13:43,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:13:43,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:13:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1703216025, now seen corresponding path program 1 times [2022-07-19 21:13:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:43,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566594078] [2022-07-19 21:13:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 21:13:43,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:43,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566594078] [2022-07-19 21:13:43,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566594078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:43,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:43,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:13:43,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043530156] [2022-07-19 21:13:43,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:43,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:13:43,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:13:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:13:43,108 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 471 out of 504 [2022-07-19 21:13:43,113 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 489 transitions, 1008 flow. Second operand has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 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 21:13:43,113 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:43,114 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 471 of 504 [2022-07-19 21:13:43,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:43,349 INFO L129 PetriNetUnfolder]: 84/1054 cut-off events. [2022-07-19 21:13:43,350 INFO L130 PetriNetUnfolder]: For 33/37 co-relation queries the response was YES. [2022-07-19 21:13:43,368 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 1054 events. 84/1054 cut-off events. For 33/37 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6385 event pairs, 0 based on Foata normal form. 0/962 useless extension candidates. Maximal degree in co-relation 1052. Up to 18 conditions per place. [2022-07-19 21:13:43,375 INFO L132 encePairwiseOnDemand]: 500/504 looper letters, 13 selfloop transitions, 1 changer transitions 0/483 dead transitions. [2022-07-19 21:13:43,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 483 transitions, 1024 flow [2022-07-19 21:13:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:13:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:13:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1430 transitions. [2022-07-19 21:13:43,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9457671957671958 [2022-07-19 21:13:43,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1430 transitions. [2022-07-19 21:13:43,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1430 transitions. [2022-07-19 21:13:43,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:43,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1430 transitions. [2022-07-19 21:13:43,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 476.6666666666667) internal successors, (1430), 3 states have internal predecessors, (1430), 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 21:13:43,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 21:13:43,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 21:13:43,387 INFO L186 Difference]: Start difference. First operand has 457 places, 489 transitions, 1008 flow. Second operand 3 states and 1430 transitions. [2022-07-19 21:13:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 483 transitions, 1024 flow [2022-07-19 21:13:43,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 483 transitions, 1016 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:13:43,398 INFO L242 Difference]: Finished difference. Result has 452 places, 483 transitions, 990 flow [2022-07-19 21:13:43,399 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=990, PETRI_PLACES=452, PETRI_TRANSITIONS=483} [2022-07-19 21:13:43,400 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, -3 predicate places. [2022-07-19 21:13:43,400 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 483 transitions, 990 flow [2022-07-19 21:13:43,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 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 21:13:43,401 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:43,402 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-07-19 21:13:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:13:43,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:13:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash 688471773, now seen corresponding path program 1 times [2022-07-19 21:13:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:43,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831855196] [2022-07-19 21:13:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:43,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 21:13:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831855196] [2022-07-19 21:13:43,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831855196] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:43,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:43,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:13:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85138473] [2022-07-19 21:13:43,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:43,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:13:43,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:13:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:13:43,524 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 504 [2022-07-19 21:13:43,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 483 transitions, 990 flow. Second operand has 5 states, 5 states have (on average 438.8) internal successors, (2194), 5 states have internal predecessors, (2194), 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 21:13:43,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:43,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 504 [2022-07-19 21:13:43,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:46,462 INFO L129 PetriNetUnfolder]: 2919/15709 cut-off events. [2022-07-19 21:13:46,463 INFO L130 PetriNetUnfolder]: For 140/228 co-relation queries the response was YES. [2022-07-19 21:13:46,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 15709 events. 2919/15709 cut-off events. For 140/228 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 182904 event pairs, 1464 based on Foata normal form. 0/14009 useless extension candidates. Maximal degree in co-relation 18760. Up to 2942 conditions per place. [2022-07-19 21:13:46,714 INFO L132 encePairwiseOnDemand]: 496/504 looper letters, 49 selfloop transitions, 6 changer transitions 1/483 dead transitions. [2022-07-19 21:13:46,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 483 transitions, 1102 flow [2022-07-19 21:13:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:13:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:13:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2232 transitions. [2022-07-19 21:13:46,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8857142857142857 [2022-07-19 21:13:46,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2232 transitions. [2022-07-19 21:13:46,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2232 transitions. [2022-07-19 21:13:46,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:46,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2232 transitions. [2022-07-19 21:13:46,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 446.4) internal successors, (2232), 5 states have internal predecessors, (2232), 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 21:13:46,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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 21:13:46,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 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 21:13:46,732 INFO L186 Difference]: Start difference. First operand has 452 places, 483 transitions, 990 flow. Second operand 5 states and 2232 transitions. [2022-07-19 21:13:46,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 483 transitions, 1102 flow [2022-07-19 21:13:46,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 483 transitions, 1101 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:13:46,741 INFO L242 Difference]: Finished difference. Result has 454 places, 482 transitions, 1010 flow [2022-07-19 21:13:46,742 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1010, PETRI_PLACES=454, PETRI_TRANSITIONS=482} [2022-07-19 21:13:46,743 INFO L279 CegarLoopForPetriNet]: 455 programPoint places, -1 predicate places. [2022-07-19 21:13:46,743 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 482 transitions, 1010 flow [2022-07-19 21:13:46,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 438.8) internal successors, (2194), 5 states have internal predecessors, (2194), 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 21:13:46,745 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:46,745 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-07-19 21:13:46,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:13:46,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:13:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1704620567, now seen corresponding path program 1 times [2022-07-19 21:13:46,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:46,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036745939] [2022-07-19 21:13:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:46,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:13:46,849 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:13:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:13:46,941 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:13:46,941 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:13:46,942 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:13:46,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:13:46,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-19 21:13:46,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:13:46,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:13:46,945 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:13:46,949 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:13:46,949 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:13:47,073 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-19 21:13:47,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 697 places, 774 transitions, 1596 flow [2022-07-19 21:13:48,097 INFO L129 PetriNetUnfolder]: 430/3582 cut-off events. [2022-07-19 21:13:48,098 INFO L130 PetriNetUnfolder]: For 72/84 co-relation queries the response was YES. [2022-07-19 21:13:48,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 3582 events. 430/3582 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 29170 event pairs, 2 based on Foata normal form. 0/3159 useless extension candidates. Maximal degree in co-relation 2004. Up to 64 conditions per place. [2022-07-19 21:13:48,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 697 places, 774 transitions, 1596 flow [2022-07-19 21:13:48,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 697 places, 774 transitions, 1596 flow [2022-07-19 21:13:48,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:48,377 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@3648e82f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c854fbe [2022-07-19 21:13:48,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:13:48,406 INFO L129 PetriNetUnfolder]: 39/412 cut-off events. [2022-07-19 21:13:48,406 INFO L130 PetriNetUnfolder]: For 11/13 co-relation queries the response was YES. [2022-07-19 21:13:48,406 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:48,407 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2022-07-19 21:13:48,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:13:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:48,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1094861806, now seen corresponding path program 1 times [2022-07-19 21:13:48,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:48,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210912632] [2022-07-19 21:13:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 21:13:48,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:48,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210912632] [2022-07-19 21:13:48,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210912632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:48,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:48,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:13:48,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816567197] [2022-07-19 21:13:48,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:48,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:13:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:13:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:13:48,515 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 719 out of 774 [2022-07-19 21:13:48,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 774 transitions, 1596 flow. Second operand has 5 states, 5 states have (on average 720.8) internal successors, (3604), 5 states have internal predecessors, (3604), 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 21:13:48,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:48,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 719 of 774 [2022-07-19 21:13:48,519 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:49,727 INFO L129 PetriNetUnfolder]: 315/3460 cut-off events. [2022-07-19 21:13:49,727 INFO L130 PetriNetUnfolder]: For 230/287 co-relation queries the response was YES. [2022-07-19 21:13:49,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 3460 events. 315/3460 cut-off events. For 230/287 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28761 event pairs, 1 based on Foata normal form. 411/3563 useless extension candidates. Maximal degree in co-relation 2017. Up to 130 conditions per place. [2022-07-19 21:13:49,920 INFO L132 encePairwiseOnDemand]: 752/774 looper letters, 31 selfloop transitions, 4 changer transitions 0/753 dead transitions. [2022-07-19 21:13:49,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 753 transitions, 1624 flow [2022-07-19 21:13:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:13:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:13:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3658 transitions. [2022-07-19 21:13:49,928 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.945219638242894 [2022-07-19 21:13:49,928 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3658 transitions. [2022-07-19 21:13:49,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3658 transitions. [2022-07-19 21:13:49,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:49,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3658 transitions. [2022-07-19 21:13:49,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 731.6) internal successors, (3658), 5 states have internal predecessors, (3658), 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 21:13:49,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 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 21:13:49,947 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 774.0) internal successors, (4644), 6 states have internal predecessors, (4644), 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 21:13:49,948 INFO L186 Difference]: Start difference. First operand has 697 places, 774 transitions, 1596 flow. Second operand 5 states and 3658 transitions. [2022-07-19 21:13:49,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 753 transitions, 1624 flow [2022-07-19 21:13:49,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 753 transitions, 1624 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:13:49,961 INFO L242 Difference]: Finished difference. Result has 698 places, 753 transitions, 1562 flow [2022-07-19 21:13:49,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1562, PETRI_PLACES=698, PETRI_TRANSITIONS=753} [2022-07-19 21:13:49,965 INFO L279 CegarLoopForPetriNet]: 697 programPoint places, 1 predicate places. [2022-07-19 21:13:49,965 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 753 transitions, 1562 flow [2022-07-19 21:13:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 720.8) internal successors, (3604), 5 states have internal predecessors, (3604), 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 21:13:49,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:49,967 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2022-07-19 21:13:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:13:49,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:13:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash -409247448, now seen corresponding path program 1 times [2022-07-19 21:13:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30310697] [2022-07-19 21:13:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 21:13:50,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30310697] [2022-07-19 21:13:50,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30310697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:50,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:50,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:13:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912834600] [2022-07-19 21:13:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:13:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:13:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:13:50,036 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 729 out of 774 [2022-07-19 21:13:50,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 753 transitions, 1562 flow. Second operand has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 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 21:13:50,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:50,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 729 of 774 [2022-07-19 21:13:50,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:13:51,048 INFO L129 PetriNetUnfolder]: 312/3454 cut-off events. [2022-07-19 21:13:51,048 INFO L130 PetriNetUnfolder]: For 224/245 co-relation queries the response was YES. [2022-07-19 21:13:51,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 3454 events. 312/3454 cut-off events. For 224/245 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 28734 event pairs, 1 based on Foata normal form. 0/3149 useless extension candidates. Maximal degree in co-relation 3540. Up to 79 conditions per place. [2022-07-19 21:13:51,258 INFO L132 encePairwiseOnDemand]: 770/774 looper letters, 19 selfloop transitions, 1 changer transitions 0/747 dead transitions. [2022-07-19 21:13:51,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 747 transitions, 1590 flow [2022-07-19 21:13:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:13:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:13:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2210 transitions. [2022-07-19 21:13:51,266 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9517657192075797 [2022-07-19 21:13:51,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2210 transitions. [2022-07-19 21:13:51,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2210 transitions. [2022-07-19 21:13:51,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:13:51,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2210 transitions. [2022-07-19 21:13:51,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 736.6666666666666) internal successors, (2210), 3 states have internal predecessors, (2210), 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 21:13:51,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 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 21:13:51,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 774.0) internal successors, (3096), 4 states have internal predecessors, (3096), 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 21:13:51,281 INFO L186 Difference]: Start difference. First operand has 698 places, 753 transitions, 1562 flow. Second operand 3 states and 2210 transitions. [2022-07-19 21:13:51,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 747 transitions, 1590 flow [2022-07-19 21:13:51,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 747 transitions, 1582 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:13:51,297 INFO L242 Difference]: Finished difference. Result has 693 places, 747 transitions, 1544 flow [2022-07-19 21:13:51,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=774, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=746, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1544, PETRI_PLACES=693, PETRI_TRANSITIONS=747} [2022-07-19 21:13:51,302 INFO L279 CegarLoopForPetriNet]: 697 programPoint places, -4 predicate places. [2022-07-19 21:13:51,303 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 747 transitions, 1544 flow [2022-07-19 21:13:51,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 731.3333333333334) internal successors, (2194), 3 states have internal predecessors, (2194), 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 21:13:51,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:51,311 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2022-07-19 21:13:51,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:13:51,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [consumer_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:13:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1207477274, now seen corresponding path program 1 times [2022-07-19 21:13:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:51,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598315386] [2022-07-19 21:13:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 21:13:51,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598315386] [2022-07-19 21:13:51,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598315386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:51,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:51,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:13:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903805063] [2022-07-19 21:13:51,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:51,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:13:51,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:13:51,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:13:51,399 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 679 out of 774 [2022-07-19 21:13:51,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 747 transitions, 1544 flow. Second operand has 5 states, 5 states have (on average 683.0) internal successors, (3415), 5 states have internal predecessors, (3415), 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 21:13:51,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:51,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 679 of 774 [2022-07-19 21:13:51,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand