./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/indexer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/indexer.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 f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:12:03,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:12:03,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:12:03,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:12:03,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:12:03,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:12:03,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:12:03,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:12:03,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:12:03,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:12:03,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:12:03,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:12:03,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:12:03,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:12:03,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:12:03,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:12:03,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:12:03,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:12:03,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:12:03,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:12:03,896 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:12:03,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:12:03,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:12:03,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:12:03,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:12:03,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:12:03,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:12:03,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:12:03,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:12:03,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:12:03,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:12:03,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:12:03,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:12:03,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:12:03,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:12:03,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:12:03,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:12:03,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:12:03,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:12:03,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:12:03,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:12:03,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:12:03,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:12:03,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:12:03,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:12:03,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:12:03,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:12:03,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:12:03,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:12:03,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:12:03,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:12:03,938 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:12:03,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:12:03,939 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:12:03,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:12:03,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:12:03,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:12:03,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:12:03,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:12:03,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:12:03,940 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:12:03,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:12:03,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:12:03,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:12:03,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:12:03,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:12:03,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:12:03,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:12:03,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:12:03,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:12:03,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:12:03,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:12:03,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:12:03,943 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:12:03,944 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:12:03,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:12:03,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c [2022-07-22 21:12:04,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:12:04,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:12:04,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:12:04,155 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:12:04,156 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:12:04,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/indexer.i [2022-07-22 21:12:04,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e275257f5/8b9fba09b9f64fffbd08ffef0e02059f/FLAGc972917f6 [2022-07-22 21:12:04,596 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:12:04,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/indexer.i [2022-07-22 21:12:04,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e275257f5/8b9fba09b9f64fffbd08ffef0e02059f/FLAGc972917f6 [2022-07-22 21:12:04,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e275257f5/8b9fba09b9f64fffbd08ffef0e02059f [2022-07-22 21:12:04,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:12:04,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:12:04,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:12:04,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:12:04,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:12:04,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:12:04" (1/1) ... [2022-07-22 21:12:04,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a8d043e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:04, skipping insertion in model container [2022-07-22 21:12:04,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:12:04" (1/1) ... [2022-07-22 21:12:04,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:12:05,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:12:05,328 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/indexer.i[47556,47569] [2022-07-22 21:12:05,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:12:05,374 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:12:05,393 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/indexer.i[47556,47569] [2022-07-22 21:12:05,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:12:05,429 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:12:05,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05 WrapperNode [2022-07-22 21:12:05,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:12:05,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:12:05,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:12:05,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:12:05,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,463 INFO L137 Inliner]: procedures = 269, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2022-07-22 21:12:05,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:12:05,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:12:05,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:12:05,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:12:05,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:12:05,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:12:05,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:12:05,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:12:05,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (1/1) ... [2022-07-22 21:12:05,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:12:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:05,522 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) [2022-07-22 21:12:05,524 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 [2022-07-22 21:12:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:12:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:12:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:12:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2022-07-22 21:12:05,548 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2022-07-22 21:12:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:12:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:12:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:12:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:12:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:12:05,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:12:05,550 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:12:05,620 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:12:05,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:12:05,800 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:12:05,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:12:05,808 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:12:05,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:12:05 BoogieIcfgContainer [2022-07-22 21:12:05,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:12:05,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:12:05,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:12:05,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:12:05,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:12:04" (1/3) ... [2022-07-22 21:12:05,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a84b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:12:05, skipping insertion in model container [2022-07-22 21:12:05,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:12:05" (2/3) ... [2022-07-22 21:12:05,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a84b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:12:05, skipping insertion in model container [2022-07-22 21:12:05,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:12:05" (3/3) ... [2022-07-22 21:12:05,825 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2022-07-22 21:12:05,828 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:12:05,836 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:12:05,836 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:12:05,836 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:12:05,896 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:12:05,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 252 flow [2022-07-22 21:12:06,026 INFO L129 PetriNetUnfolder]: 18/146 cut-off events. [2022-07-22 21:12:06,027 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:12:06,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 146 events. 18/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 225 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-07-22 21:12:06,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 252 flow [2022-07-22 21:12:06,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 117 transitions, 239 flow [2022-07-22 21:12:06,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:12:06,056 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@681b1305, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5187f13 [2022-07-22 21:12:06,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:12:06,069 INFO L129 PetriNetUnfolder]: 11/95 cut-off events. [2022-07-22 21:12:06,070 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:12:06,070 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:06,071 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:12:06,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:06,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1973979282, now seen corresponding path program 1 times [2022-07-22 21:12:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:06,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985615907] [2022-07-22 21:12:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:06,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:06,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:06,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985615907] [2022-07-22 21:12:06,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985615907] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:12:06,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:12:06,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:12:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943271324] [2022-07-22 21:12:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:12:06,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:12:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:12:06,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:12:06,272 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 122 [2022-07-22 21:12:06,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 239 flow. Second operand has 2 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 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) [2022-07-22 21:12:06,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:06,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 122 [2022-07-22 21:12:06,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:06,298 INFO L129 PetriNetUnfolder]: 6/129 cut-off events. [2022-07-22 21:12:06,298 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:12:06,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 129 events. 6/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 179 event pairs, 0 based on Foata normal form. 10/128 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-07-22 21:12:06,300 INFO L132 encePairwiseOnDemand]: 114/122 looper letters, 1 selfloop transitions, 0 changer transitions 0/108 dead transitions. [2022-07-22 21:12:06,300 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 223 flow [2022-07-22 21:12:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:12:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:12:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 231 transitions. [2022-07-22 21:12:06,310 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9467213114754098 [2022-07-22 21:12:06,311 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 231 transitions. [2022-07-22 21:12:06,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 231 transitions. [2022-07-22 21:12:06,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:06,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 231 transitions. [2022-07-22 21:12:06,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 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) [2022-07-22 21:12:06,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2022-07-22 21:12:06,321 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 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) [2022-07-22 21:12:06,322 INFO L186 Difference]: Start difference. First operand has 107 places, 117 transitions, 239 flow. Second operand 2 states and 231 transitions. [2022-07-22 21:12:06,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 223 flow [2022-07-22 21:12:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 108 transitions, 223 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:12:06,328 INFO L242 Difference]: Finished difference. Result has 107 places, 108 transitions, 221 flow [2022-07-22 21:12:06,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=221, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2022-07-22 21:12:06,331 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 0 predicate places. [2022-07-22 21:12:06,332 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 221 flow [2022-07-22 21:12:06,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 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) [2022-07-22 21:12:06,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:06,340 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:12:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:12:06,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1129507411, now seen corresponding path program 1 times [2022-07-22 21:12:06,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:06,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528405643] [2022-07-22 21:12:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:06,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528405643] [2022-07-22 21:12:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528405643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:12:06,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:12:06,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:12:06,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881885276] [2022-07-22 21:12:06,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:12:06,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:12:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:06,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:12:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:12:06,417 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 122 [2022-07-22 21:12:06,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-07-22 21:12:06,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:06,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 122 [2022-07-22 21:12:06,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:06,453 INFO L129 PetriNetUnfolder]: 4/105 cut-off events. [2022-07-22 21:12:06,453 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:12:06,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 105 events. 4/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 134. Up to 14 conditions per place. [2022-07-22 21:12:06,454 INFO L132 encePairwiseOnDemand]: 114/122 looper letters, 21 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-07-22 21:12:06,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 263 flow [2022-07-22 21:12:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:12:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:12:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2022-07-22 21:12:06,456 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7759562841530054 [2022-07-22 21:12:06,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2022-07-22 21:12:06,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2022-07-22 21:12:06,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:06,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2022-07-22 21:12:06,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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) [2022-07-22 21:12:06,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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) [2022-07-22 21:12:06,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 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) [2022-07-22 21:12:06,460 INFO L186 Difference]: Start difference. First operand has 107 places, 108 transitions, 221 flow. Second operand 3 states and 284 transitions. [2022-07-22 21:12:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 263 flow [2022-07-22 21:12:06,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 103 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:12:06,463 INFO L242 Difference]: Finished difference. Result has 99 places, 97 transitions, 220 flow [2022-07-22 21:12:06,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2022-07-22 21:12:06,463 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -8 predicate places. [2022-07-22 21:12:06,464 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 220 flow [2022-07-22 21:12:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2022-07-22 21:12:06,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:06,464 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:12:06,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:12:06,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1175273194, now seen corresponding path program 1 times [2022-07-22 21:12:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:06,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444964300] [2022-07-22 21:12:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:06,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444964300] [2022-07-22 21:12:06,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444964300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:12:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711459467] [2022-07-22 21:12:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:06,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:06,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:06,546 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) [2022-07-22 21:12:06,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:12:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:06,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:12:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:12:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:06,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:12:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:06,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711459467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:12:06,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:12:06,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:12:06,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954300859] [2022-07-22 21:12:06,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:12:06,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:12:06,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:06,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:12:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:12:06,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-22 21:12:06,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 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) [2022-07-22 21:12:06,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:06,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-22 21:12:06,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:06,869 INFO L129 PetriNetUnfolder]: 4/112 cut-off events. [2022-07-22 21:12:06,871 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:12:06,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 112 events. 4/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 160. Up to 12 conditions per place. [2022-07-22 21:12:06,874 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 21 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2022-07-22 21:12:06,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 316 flow [2022-07-22 21:12:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:12:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:12:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 876 transitions. [2022-07-22 21:12:06,881 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180327868852459 [2022-07-22 21:12:06,883 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 876 transitions. [2022-07-22 21:12:06,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 876 transitions. [2022-07-22 21:12:06,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:06,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 876 transitions. [2022-07-22 21:12:06,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.6) internal successors, (876), 10 states have internal predecessors, (876), 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) [2022-07-22 21:12:06,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 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) [2022-07-22 21:12:06,892 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 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) [2022-07-22 21:12:06,892 INFO L186 Difference]: Start difference. First operand has 99 places, 97 transitions, 220 flow. Second operand 10 states and 876 transitions. [2022-07-22 21:12:06,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 316 flow [2022-07-22 21:12:06,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:12:06,898 INFO L242 Difference]: Finished difference. Result has 110 places, 104 transitions, 281 flow [2022-07-22 21:12:06,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2022-07-22 21:12:06,901 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2022-07-22 21:12:06,901 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 281 flow [2022-07-22 21:12:06,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 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) [2022-07-22 21:12:06,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:06,902 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-22 21:12:06,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:12:07,121 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 [2022-07-22 21:12:07,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1677055178, now seen corresponding path program 2 times [2022-07-22 21:12:07,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:07,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415583111] [2022-07-22 21:12:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:07,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:07,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415583111] [2022-07-22 21:12:07,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415583111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:12:07,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447001060] [2022-07-22 21:12:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:12:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:07,209 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) [2022-07-22 21:12:07,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:12:07,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:12:07,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:12:07,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:12:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:12:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:07,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:12:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:07,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447001060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:12:07,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:12:07,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-22 21:12:07,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608628196] [2022-07-22 21:12:07,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:12:07,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:12:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:12:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:12:07,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-22 21:12:07,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 281 flow. Second operand has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 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) [2022-07-22 21:12:07,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:07,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-22 21:12:07,389 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:07,577 INFO L129 PetriNetUnfolder]: 4/132 cut-off events. [2022-07-22 21:12:07,577 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-22 21:12:07,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 132 events. 4/132 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 4/132 useless extension candidates. Maximal degree in co-relation 254. Up to 13 conditions per place. [2022-07-22 21:12:07,580 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 29 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2022-07-22 21:12:07,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 130 transitions, 501 flow [2022-07-22 21:12:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:12:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:12:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1906 transitions. [2022-07-22 21:12:07,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.710134128166915 [2022-07-22 21:12:07,584 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1906 transitions. [2022-07-22 21:12:07,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1906 transitions. [2022-07-22 21:12:07,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:07,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1906 transitions. [2022-07-22 21:12:07,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.63636363636364) internal successors, (1906), 22 states have internal predecessors, (1906), 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) [2022-07-22 21:12:07,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 122.0) internal successors, (2806), 23 states have internal predecessors, (2806), 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) [2022-07-22 21:12:07,594 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 122.0) internal successors, (2806), 23 states have internal predecessors, (2806), 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) [2022-07-22 21:12:07,594 INFO L186 Difference]: Start difference. First operand has 110 places, 104 transitions, 281 flow. Second operand 22 states and 1906 transitions. [2022-07-22 21:12:07,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 130 transitions, 501 flow [2022-07-22 21:12:07,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 130 transitions, 484 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-22 21:12:07,602 INFO L242 Difference]: Finished difference. Result has 135 places, 117 transitions, 414 flow [2022-07-22 21:12:07,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=414, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2022-07-22 21:12:07,604 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 28 predicate places. [2022-07-22 21:12:07,604 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 414 flow [2022-07-22 21:12:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 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) [2022-07-22 21:12:07,605 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:07,605 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2022-07-22 21:12:07,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:12:07,838 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 [2022-07-22 21:12:07,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash 894994294, now seen corresponding path program 3 times [2022-07-22 21:12:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815162286] [2022-07-22 21:12:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:07,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:08,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815162286] [2022-07-22 21:12:08,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815162286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:12:08,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94293906] [2022-07-22 21:12:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:12:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:08,040 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) [2022-07-22 21:12:08,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:12:08,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 21:12:08,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:12:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 21:12:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:12:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:08,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:12:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:08,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94293906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:12:08,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:12:08,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-22 21:12:08,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3281631] [2022-07-22 21:12:08,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:12:08,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 21:12:08,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 21:12:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 21:12:08,468 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-22 21:12:08,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 414 flow. Second operand has 34 states, 34 states have (on average 86.58823529411765) internal successors, (2944), 34 states have internal predecessors, (2944), 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) [2022-07-22 21:12:08,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:08,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-22 21:12:08,470 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:08,897 INFO L129 PetriNetUnfolder]: 4/172 cut-off events. [2022-07-22 21:12:08,897 INFO L130 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2022-07-22 21:12:08,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 172 events. 4/172 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 8/176 useless extension candidates. Maximal degree in co-relation 465. Up to 28 conditions per place. [2022-07-22 21:12:08,899 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 45 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2022-07-22 21:12:08,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 922 flow [2022-07-22 21:12:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 21:12:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-22 21:12:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3966 transitions. [2022-07-22 21:12:08,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7066999287241625 [2022-07-22 21:12:08,905 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3966 transitions. [2022-07-22 21:12:08,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3966 transitions. [2022-07-22 21:12:08,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:08,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3966 transitions. [2022-07-22 21:12:08,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 86.21739130434783) internal successors, (3966), 46 states have internal predecessors, (3966), 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) [2022-07-22 21:12:08,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 122.0) internal successors, (5734), 47 states have internal predecessors, (5734), 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) [2022-07-22 21:12:08,921 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 122.0) internal successors, (5734), 47 states have internal predecessors, (5734), 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) [2022-07-22 21:12:08,921 INFO L186 Difference]: Start difference. First operand has 135 places, 117 transitions, 414 flow. Second operand 46 states and 3966 transitions. [2022-07-22 21:12:08,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 922 flow [2022-07-22 21:12:08,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 170 transitions, 879 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-22 21:12:08,927 INFO L242 Difference]: Finished difference. Result has 183 places, 142 transitions, 701 flow [2022-07-22 21:12:08,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=701, PETRI_PLACES=183, PETRI_TRANSITIONS=142} [2022-07-22 21:12:08,928 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 76 predicate places. [2022-07-22 21:12:08,928 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 142 transitions, 701 flow [2022-07-22 21:12:08,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 86.58823529411765) internal successors, (2944), 34 states have internal predecessors, (2944), 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) [2022-07-22 21:12:08,929 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:08,930 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 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] [2022-07-22 21:12:08,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:12:09,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:09,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1528078346, now seen corresponding path program 4 times [2022-07-22 21:12:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:09,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617174920] [2022-07-22 21:12:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:09,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617174920] [2022-07-22 21:12:09,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617174920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:12:09,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235876965] [2022-07-22 21:12:09,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:12:09,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:09,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:12:09,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:12:09,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:12:09,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:12:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 21:12:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:12:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:09,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:12:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:10,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235876965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:12:10,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:12:10,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-22 21:12:10,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996672957] [2022-07-22 21:12:10,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:12:10,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 21:12:10,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 21:12:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 21:12:10,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-22 21:12:10,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 142 transitions, 701 flow. Second operand has 66 states, 66 states have (on average 86.54545454545455) internal successors, (5712), 66 states have internal predecessors, (5712), 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) [2022-07-22 21:12:10,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:10,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-22 21:12:10,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:11,993 INFO L129 PetriNetUnfolder]: 4/252 cut-off events. [2022-07-22 21:12:11,994 INFO L130 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-07-22 21:12:11,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 252 events. 4/252 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 16/264 useless extension candidates. Maximal degree in co-relation 955. Up to 58 conditions per place. [2022-07-22 21:12:11,995 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 77 selfloop transitions, 97 changer transitions 0/250 dead transitions. [2022-07-22 21:12:11,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 250 transitions, 1901 flow [2022-07-22 21:12:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-22 21:12:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-22 21:12:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8002 transitions. [2022-07-22 21:12:12,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.705270579940067 [2022-07-22 21:12:12,003 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8002 transitions. [2022-07-22 21:12:12,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8002 transitions. [2022-07-22 21:12:12,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:12,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8002 transitions. [2022-07-22 21:12:12,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 86.04301075268818) internal successors, (8002), 93 states have internal predecessors, (8002), 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) [2022-07-22 21:12:12,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 122.0) internal successors, (11468), 94 states have internal predecessors, (11468), 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) [2022-07-22 21:12:12,029 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 122.0) internal successors, (11468), 94 states have internal predecessors, (11468), 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) [2022-07-22 21:12:12,029 INFO L186 Difference]: Start difference. First operand has 183 places, 142 transitions, 701 flow. Second operand 93 states and 8002 transitions. [2022-07-22 21:12:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 250 transitions, 1901 flow [2022-07-22 21:12:12,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 250 transitions, 1810 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-22 21:12:12,038 INFO L242 Difference]: Finished difference. Result has 274 places, 191 transitions, 1344 flow [2022-07-22 21:12:12,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1344, PETRI_PLACES=274, PETRI_TRANSITIONS=191} [2022-07-22 21:12:12,038 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 167 predicate places. [2022-07-22 21:12:12,039 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 191 transitions, 1344 flow [2022-07-22 21:12:12,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 86.54545454545455) internal successors, (5712), 66 states have internal predecessors, (5712), 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) [2022-07-22 21:12:12,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:12,041 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 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] [2022-07-22 21:12:12,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:12:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:12,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 665424118, now seen corresponding path program 5 times [2022-07-22 21:12:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:12,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44161076] [2022-07-22 21:12:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:13,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44161076] [2022-07-22 21:12:13,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44161076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:12:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762034958] [2022-07-22 21:12:13,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:12:13,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:13,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:12:13,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:12:17,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-22 21:12:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:12:17,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 21:12:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:12:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:17,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:12:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:20,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762034958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:12:20,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:12:20,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-22 21:12:20,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093272470] [2022-07-22 21:12:20,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:12:20,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-22 21:12:20,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:12:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-22 21:12:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-22 21:12:20,171 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-22 21:12:20,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 191 transitions, 1344 flow. Second operand has 130 states, 130 states have (on average 86.52307692307693) internal successors, (11248), 130 states have internal predecessors, (11248), 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) [2022-07-22 21:12:20,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:12:20,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-22 21:12:20,176 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:12:24,239 INFO L129 PetriNetUnfolder]: 4/412 cut-off events. [2022-07-22 21:12:24,239 INFO L130 PetriNetUnfolder]: For 16833/16833 co-relation queries the response was YES. [2022-07-22 21:12:24,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 412 events. 4/412 cut-off events. For 16833/16833 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 32/440 useless extension candidates. Maximal degree in co-relation 2085. Up to 122 conditions per place. [2022-07-22 21:12:24,241 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 141 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2022-07-22 21:12:24,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 410 transitions, 4160 flow [2022-07-22 21:12:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-07-22 21:12:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2022-07-22 21:12:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 16242 transitions. [2022-07-22 21:12:24,254 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7043976060369503 [2022-07-22 21:12:24,254 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 16242 transitions. [2022-07-22 21:12:24,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 16242 transitions. [2022-07-22 21:12:24,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:12:24,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 16242 transitions. [2022-07-22 21:12:24,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 190 states, 189 states have (on average 85.93650793650794) internal successors, (16242), 189 states have internal predecessors, (16242), 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) [2022-07-22 21:12:24,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 190 states, 190 states have (on average 122.0) internal successors, (23180), 190 states have internal predecessors, (23180), 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) [2022-07-22 21:12:24,303 INFO L81 ComplementDD]: Finished complementDD. Result has 190 states, 190 states have (on average 122.0) internal successors, (23180), 190 states have internal predecessors, (23180), 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) [2022-07-22 21:12:24,303 INFO L186 Difference]: Start difference. First operand has 274 places, 191 transitions, 1344 flow. Second operand 189 states and 16242 transitions. [2022-07-22 21:12:24,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 410 transitions, 4160 flow [2022-07-22 21:12:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 410 transitions, 3972 flow, removed 50 selfloop flow, removed 42 redundant places. [2022-07-22 21:12:24,329 INFO L242 Difference]: Finished difference. Result has 453 places, 288 transitions, 2790 flow [2022-07-22 21:12:24,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=189, PETRI_FLOW=2790, PETRI_PLACES=453, PETRI_TRANSITIONS=288} [2022-07-22 21:12:24,330 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 346 predicate places. [2022-07-22 21:12:24,330 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 288 transitions, 2790 flow [2022-07-22 21:12:24,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 86.52307692307693) internal successors, (11248), 130 states have internal predecessors, (11248), 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) [2022-07-22 21:12:24,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:12:24,333 INFO L200 CegarLoopForPetriNet]: trace histogram [63, 63, 63, 63, 63, 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] [2022-07-22 21:12:24,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:12:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:24,548 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 21:12:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:12:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash -108530954, now seen corresponding path program 6 times [2022-07-22 21:12:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:12:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615772229] [2022-07-22 21:12:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:12:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:12:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:12:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9834 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 21:12:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:12:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615772229] [2022-07-22 21:12:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615772229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:12:27,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329849984] [2022-07-22 21:12:27,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:12:27,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:12:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:12:27,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:12:27,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process