./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 f4b24e32 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-?-f4b24e3 [2022-07-13 21:35:32,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:35:32,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:35:32,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:35:32,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:35:32,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:35:32,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:35:32,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:35:32,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:35:32,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:35:32,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:35:32,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:35:32,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:35:32,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:35:32,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:35:32,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:35:32,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:35:32,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:35:32,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:35:32,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:35:32,659 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:35:32,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:35:32,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:35:32,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:35:32,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:35:32,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:35:32,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:35:32,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:35:32,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:35:32,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:35:32,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:35:32,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:35:32,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:35:32,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:35:32,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:35:32,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:35:32,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:35:32,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:35:32,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:35:32,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:35:32,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:35:32,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:35:32,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:35:32,706 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:35:32,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:35:32,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:35:32,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:35:32,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:35:32,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:35:32,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:35:32,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:35:32,709 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:35:32,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:35:32,710 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:35:32,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:35:32,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:35:32,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:35:32,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:35:32,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:35:32,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:35:32,711 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:35:32,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:35:32,711 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:35:32,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:35:32,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:35:32,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:35:32,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:35:32,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:35:32,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:35:32,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:35:32,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:35:32,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:35:32,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:35:32,713 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:35:32,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:35:32,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:35:32,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c [2022-07-13 21:35:32,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:35:32,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:35:32,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:35:32,950 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:35:32,951 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:35:32,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/indexer.i [2022-07-13 21:35:33,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4623019ac/d46de3853e0e4635aef7d8d98ac56304/FLAG878aa75c9 [2022-07-13 21:35:33,404 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:35:33,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/indexer.i [2022-07-13 21:35:33,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4623019ac/d46de3853e0e4635aef7d8d98ac56304/FLAG878aa75c9 [2022-07-13 21:35:33,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4623019ac/d46de3853e0e4635aef7d8d98ac56304 [2022-07-13 21:35:33,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:35:33,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:35:33,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:35:33,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:35:33,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:35:33,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:35:33" (1/1) ... [2022-07-13 21:35:33,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e21f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:33, skipping insertion in model container [2022-07-13 21:35:33,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:35:33" (1/1) ... [2022-07-13 21:35:33,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:35:33,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:35:34,135 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] [2022-07-13 21:35:34,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:35:34,173 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:35:34,202 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] [2022-07-13 21:35:34,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:35:34,254 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:35:34,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34 WrapperNode [2022-07-13 21:35:34,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:35:34,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:35:34,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:35:34,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:35:34,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,299 INFO L137 Inliner]: procedures = 269, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2022-07-13 21:35:34,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:35:34,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:35:34,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:35:34,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:35:34,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:35:34,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:35:34,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:35:34,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:35:34,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (1/1) ... [2022-07-13 21:35:34,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:35:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:34,350 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) [2022-07-13 21:35:34,391 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 [2022-07-13 21:35:34,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:35:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:35:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:35:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2022-07-13 21:35:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2022-07-13 21:35:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:35:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:35:34,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:35:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:35:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:35:34,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:35:34,416 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:35:34,507 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:35:34,508 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:35:34,665 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:35:34,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:35:34,670 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 21:35:34,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:35:34 BoogieIcfgContainer [2022-07-13 21:35:34,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:35:34,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:35:34,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:35:34,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:35:34,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:35:33" (1/3) ... [2022-07-13 21:35:34,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c45e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:35:34, skipping insertion in model container [2022-07-13 21:35:34,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:35:34" (2/3) ... [2022-07-13 21:35:34,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c45e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:35:34, skipping insertion in model container [2022-07-13 21:35:34,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:35:34" (3/3) ... [2022-07-13 21:35:34,683 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2022-07-13 21:35:34,686 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:35:34,693 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:35:34,693 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:35:34,693 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:35:34,755 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:35:34,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 252 flow [2022-07-13 21:35:34,818 INFO L129 PetriNetUnfolder]: 18/146 cut-off events. [2022-07-13 21:35:34,818 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:35:34,823 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. [2022-07-13 21:35:34,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 252 flow [2022-07-13 21:35:34,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 117 transitions, 239 flow [2022-07-13 21:35:34,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:35:34,838 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@325b3026, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7aaa271 [2022-07-13 21:35:34,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 21:35:34,852 INFO L129 PetriNetUnfolder]: 11/95 cut-off events. [2022-07-13 21:35:34,852 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:35:34,852 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:34,853 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] [2022-07-13 21:35:34,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1973979282, now seen corresponding path program 1 times [2022-07-13 21:35:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:34,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203470917] [2022-07-13 21:35:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203470917] [2022-07-13 21:35:34,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203470917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:35:34,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:35:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:35:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404889555] [2022-07-13 21:35:34,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:35:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:35:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:35:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:35:35,009 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 122 [2022-07-13 21:35:35,014 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) [2022-07-13 21:35:35,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:35,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 122 [2022-07-13 21:35:35,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:35,064 INFO L129 PetriNetUnfolder]: 6/129 cut-off events. [2022-07-13 21:35:35,065 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:35:35,067 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. [2022-07-13 21:35:35,068 INFO L132 encePairwiseOnDemand]: 114/122 looper letters, 1 selfloop transitions, 0 changer transitions 0/108 dead transitions. [2022-07-13 21:35:35,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 223 flow [2022-07-13 21:35:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:35:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:35:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 231 transitions. [2022-07-13 21:35:35,082 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9467213114754098 [2022-07-13 21:35:35,083 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 231 transitions. [2022-07-13 21:35:35,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 231 transitions. [2022-07-13 21:35:35,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:35,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 231 transitions. [2022-07-13 21:35:35,091 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) [2022-07-13 21:35:35,093 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) [2022-07-13 21:35:35,094 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) [2022-07-13 21:35:35,095 INFO L186 Difference]: Start difference. First operand has 107 places, 117 transitions, 239 flow. Second operand 2 states and 231 transitions. [2022-07-13 21:35:35,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 223 flow [2022-07-13 21:35:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 108 transitions, 223 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:35:35,100 INFO L242 Difference]: Finished difference. Result has 107 places, 108 transitions, 221 flow [2022-07-13 21:35:35,102 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} [2022-07-13 21:35:35,106 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 0 predicate places. [2022-07-13 21:35:35,107 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 221 flow [2022-07-13 21:35:35,107 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) [2022-07-13 21:35:35,107 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:35,108 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] [2022-07-13 21:35:35,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:35:35,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1129507411, now seen corresponding path program 1 times [2022-07-13 21:35:35,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612793972] [2022-07-13 21:35:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:35,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:35,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:35,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612793972] [2022-07-13 21:35:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612793972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:35:35,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:35:35,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:35:35,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61020748] [2022-07-13 21:35:35,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:35:35,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:35:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:35:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:35:35,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 122 [2022-07-13 21:35:35,192 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) [2022-07-13 21:35:35,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:35,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 122 [2022-07-13 21:35:35,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:35,237 INFO L129 PetriNetUnfolder]: 4/105 cut-off events. [2022-07-13 21:35:35,238 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:35:35,238 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. [2022-07-13 21:35:35,238 INFO L132 encePairwiseOnDemand]: 114/122 looper letters, 21 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-07-13 21:35:35,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 263 flow [2022-07-13 21:35:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:35:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:35:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2022-07-13 21:35:35,245 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7759562841530054 [2022-07-13 21:35:35,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2022-07-13 21:35:35,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2022-07-13 21:35:35,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:35,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2022-07-13 21:35:35,246 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) [2022-07-13 21:35:35,249 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) [2022-07-13 21:35:35,249 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) [2022-07-13 21:35:35,250 INFO L186 Difference]: Start difference. First operand has 107 places, 108 transitions, 221 flow. Second operand 3 states and 284 transitions. [2022-07-13 21:35:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 263 flow [2022-07-13 21:35:35,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 103 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:35:35,252 INFO L242 Difference]: Finished difference. Result has 99 places, 97 transitions, 220 flow [2022-07-13 21:35:35,253 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} [2022-07-13 21:35:35,254 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -8 predicate places. [2022-07-13 21:35:35,254 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 220 flow [2022-07-13 21:35:35,255 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) [2022-07-13 21:35:35,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:35,256 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] [2022-07-13 21:35:35,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:35:35,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1175273194, now seen corresponding path program 1 times [2022-07-13 21:35:35,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:35,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080123956] [2022-07-13 21:35:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:35,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080123956] [2022-07-13 21:35:35,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080123956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:35:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379991871] [2022-07-13 21:35:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:35:35,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:35,371 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) [2022-07-13 21:35:35,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:35:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:35:35,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:35:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:35,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:35:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:35,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379991871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:35:35,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:35:35,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:35:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042769187] [2022-07-13 21:35:35,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:35:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:35:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:35:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:35:35,575 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-13 21:35:35,576 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) [2022-07-13 21:35:35,576 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:35,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-13 21:35:35,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:35,645 INFO L129 PetriNetUnfolder]: 4/112 cut-off events. [2022-07-13 21:35:35,646 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 21:35:35,646 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. [2022-07-13 21:35:35,647 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 21 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2022-07-13 21:35:35,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 316 flow [2022-07-13 21:35:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:35:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 21:35:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 876 transitions. [2022-07-13 21:35:35,651 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180327868852459 [2022-07-13 21:35:35,651 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 876 transitions. [2022-07-13 21:35:35,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 876 transitions. [2022-07-13 21:35:35,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:35,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 876 transitions. [2022-07-13 21:35:35,662 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) [2022-07-13 21:35:35,664 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) [2022-07-13 21:35:35,665 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) [2022-07-13 21:35:35,665 INFO L186 Difference]: Start difference. First operand has 99 places, 97 transitions, 220 flow. Second operand 10 states and 876 transitions. [2022-07-13 21:35:35,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 316 flow [2022-07-13 21:35:35,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:35:35,668 INFO L242 Difference]: Finished difference. Result has 110 places, 104 transitions, 281 flow [2022-07-13 21:35:35,680 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} [2022-07-13 21:35:35,681 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2022-07-13 21:35:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 281 flow [2022-07-13 21:35:35,682 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) [2022-07-13 21:35:35,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:35,682 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] [2022-07-13 21:35:35,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:35:35,898 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 [2022-07-13 21:35:35,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1677055178, now seen corresponding path program 2 times [2022-07-13 21:35:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639373457] [2022-07-13 21:35:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:35,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:36,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:36,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639373457] [2022-07-13 21:35:36,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639373457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:35:36,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078540568] [2022-07-13 21:35:36,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 21:35:36,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:35:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:36,059 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) [2022-07-13 21:35:36,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:35:36,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 21:35:36,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:35:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:35:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:35:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:36,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:35:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:36,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078540568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:35:36,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:35:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:35:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264641860] [2022-07-13 21:35:36,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:35:36,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:35:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:35:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:35:36,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-13 21:35:36,351 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) [2022-07-13 21:35:36,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:36,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-13 21:35:36,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:36,532 INFO L129 PetriNetUnfolder]: 4/132 cut-off events. [2022-07-13 21:35:36,532 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-13 21:35:36,533 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. [2022-07-13 21:35:36,533 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 29 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2022-07-13 21:35:36,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 130 transitions, 501 flow [2022-07-13 21:35:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:35:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 21:35:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1906 transitions. [2022-07-13 21:35:36,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.710134128166915 [2022-07-13 21:35:36,537 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1906 transitions. [2022-07-13 21:35:36,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1906 transitions. [2022-07-13 21:35:36,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:36,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1906 transitions. [2022-07-13 21:35:36,541 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) [2022-07-13 21:35:36,545 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) [2022-07-13 21:35:36,546 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) [2022-07-13 21:35:36,546 INFO L186 Difference]: Start difference. First operand has 110 places, 104 transitions, 281 flow. Second operand 22 states and 1906 transitions. [2022-07-13 21:35:36,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 130 transitions, 501 flow [2022-07-13 21:35:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 130 transitions, 484 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:35:36,550 INFO L242 Difference]: Finished difference. Result has 135 places, 117 transitions, 414 flow [2022-07-13 21:35:36,551 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} [2022-07-13 21:35:36,551 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 28 predicate places. [2022-07-13 21:35:36,551 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 414 flow [2022-07-13 21:35:36,552 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) [2022-07-13 21:35:36,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:36,552 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] [2022-07-13 21:35:36,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:35:36,769 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 [2022-07-13 21:35:36,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 894994294, now seen corresponding path program 3 times [2022-07-13 21:35:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:36,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243028238] [2022-07-13 21:35:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:36,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243028238] [2022-07-13 21:35:36,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243028238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:35:36,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50140798] [2022-07-13 21:35:36,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 21:35:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:35:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:36,955 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) [2022-07-13 21:35:36,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:35:37,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 21:35:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:35:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 21:35:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:35:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:37,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:35:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:37,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50140798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:35:37,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:35:37,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-13 21:35:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216503239] [2022-07-13 21:35:37,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:35:37,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 21:35:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 21:35:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:35:37,416 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-13 21:35:37,418 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) [2022-07-13 21:35:37,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:37,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-13 21:35:37,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:37,877 INFO L129 PetriNetUnfolder]: 4/172 cut-off events. [2022-07-13 21:35:37,877 INFO L130 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2022-07-13 21:35:37,878 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. [2022-07-13 21:35:37,878 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 45 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2022-07-13 21:35:37,878 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 922 flow [2022-07-13 21:35:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 21:35:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-13 21:35:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3966 transitions. [2022-07-13 21:35:37,901 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7066999287241625 [2022-07-13 21:35:37,901 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3966 transitions. [2022-07-13 21:35:37,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3966 transitions. [2022-07-13 21:35:37,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:37,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3966 transitions. [2022-07-13 21:35:37,910 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) [2022-07-13 21:35:37,917 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) [2022-07-13 21:35:37,918 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) [2022-07-13 21:35:37,918 INFO L186 Difference]: Start difference. First operand has 135 places, 117 transitions, 414 flow. Second operand 46 states and 3966 transitions. [2022-07-13 21:35:37,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 922 flow [2022-07-13 21:35:37,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 170 transitions, 879 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-13 21:35:37,924 INFO L242 Difference]: Finished difference. Result has 183 places, 142 transitions, 701 flow [2022-07-13 21:35:37,924 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} [2022-07-13 21:35:37,925 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 76 predicate places. [2022-07-13 21:35:37,925 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 142 transitions, 701 flow [2022-07-13 21:35:37,926 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) [2022-07-13 21:35:37,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:37,926 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] [2022-07-13 21:35:37,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:35:38,139 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 [2022-07-13 21:35:38,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1528078346, now seen corresponding path program 4 times [2022-07-13 21:35:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:38,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794458671] [2022-07-13 21:35:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:38,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794458671] [2022-07-13 21:35:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794458671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:35:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761378970] [2022-07-13 21:35:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 21:35:38,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:35:38,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:38,551 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) [2022-07-13 21:35:38,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:35:38,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 21:35:38,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:35:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 21:35:38,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:35:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:38,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:35:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761378970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:35:39,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:35:39,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-13 21:35:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670348366] [2022-07-13 21:35:39,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:35:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-13 21:35:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-13 21:35:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 21:35:39,462 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-13 21:35:39,465 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) [2022-07-13 21:35:39,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:39,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-13 21:35:39,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:40,872 INFO L129 PetriNetUnfolder]: 4/252 cut-off events. [2022-07-13 21:35:40,872 INFO L130 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-07-13 21:35:40,872 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. [2022-07-13 21:35:40,873 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 77 selfloop transitions, 97 changer transitions 0/250 dead transitions. [2022-07-13 21:35:40,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 250 transitions, 1901 flow [2022-07-13 21:35:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-13 21:35:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-13 21:35:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8002 transitions. [2022-07-13 21:35:40,882 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.705270579940067 [2022-07-13 21:35:40,882 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8002 transitions. [2022-07-13 21:35:40,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8002 transitions. [2022-07-13 21:35:40,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:40,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8002 transitions. [2022-07-13 21:35:40,893 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) [2022-07-13 21:35:40,906 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) [2022-07-13 21:35:40,909 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) [2022-07-13 21:35:40,909 INFO L186 Difference]: Start difference. First operand has 183 places, 142 transitions, 701 flow. Second operand 93 states and 8002 transitions. [2022-07-13 21:35:40,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 250 transitions, 1901 flow [2022-07-13 21:35:40,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 250 transitions, 1810 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-13 21:35:40,918 INFO L242 Difference]: Finished difference. Result has 274 places, 191 transitions, 1344 flow [2022-07-13 21:35:40,918 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} [2022-07-13 21:35:40,919 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 167 predicate places. [2022-07-13 21:35:40,919 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 191 transitions, 1344 flow [2022-07-13 21:35:40,921 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) [2022-07-13 21:35:40,921 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:40,921 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] [2022-07-13 21:35:40,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:35:41,137 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 [2022-07-13 21:35:41,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 665424118, now seen corresponding path program 5 times [2022-07-13 21:35:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:41,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981713197] [2022-07-13 21:35:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:42,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981713197] [2022-07-13 21:35:42,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981713197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:35:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482699818] [2022-07-13 21:35:42,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 21:35:42,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:35:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:42,167 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) [2022-07-13 21:35:42,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:35:46,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-13 21:35:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 21:35:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-13 21:35:46,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:35:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:47,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:35:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:49,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482699818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:35:49,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:35:49,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-13 21:35:49,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093847269] [2022-07-13 21:35:49,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:35:49,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-13 21:35:49,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:35:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-13 21:35:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-13 21:35:49,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-13 21:35:49,380 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) [2022-07-13 21:35:49,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:35:49,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-13 21:35:49,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:35:53,618 INFO L129 PetriNetUnfolder]: 4/412 cut-off events. [2022-07-13 21:35:53,618 INFO L130 PetriNetUnfolder]: For 16833/16833 co-relation queries the response was YES. [2022-07-13 21:35:53,619 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. [2022-07-13 21:35:53,621 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 141 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2022-07-13 21:35:53,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 410 transitions, 4160 flow [2022-07-13 21:35:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-07-13 21:35:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2022-07-13 21:35:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 16242 transitions. [2022-07-13 21:35:53,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7043976060369503 [2022-07-13 21:35:53,633 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 16242 transitions. [2022-07-13 21:35:53,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 16242 transitions. [2022-07-13 21:35:53,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:35:53,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 16242 transitions. [2022-07-13 21:35:53,676 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) [2022-07-13 21:35:53,702 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) [2022-07-13 21:35:53,709 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) [2022-07-13 21:35:53,709 INFO L186 Difference]: Start difference. First operand has 274 places, 191 transitions, 1344 flow. Second operand 189 states and 16242 transitions. [2022-07-13 21:35:53,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 410 transitions, 4160 flow [2022-07-13 21:35:53,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 410 transitions, 3972 flow, removed 50 selfloop flow, removed 42 redundant places. [2022-07-13 21:35:53,734 INFO L242 Difference]: Finished difference. Result has 453 places, 288 transitions, 2790 flow [2022-07-13 21:35:53,735 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} [2022-07-13 21:35:53,735 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 346 predicate places. [2022-07-13 21:35:53,736 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 288 transitions, 2790 flow [2022-07-13 21:35:53,738 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) [2022-07-13 21:35:53,738 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:35:53,738 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] [2022-07-13 21:35:53,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 21:35:53,974 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 [2022-07-13 21:35:53,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:35:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:35:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -108530954, now seen corresponding path program 6 times [2022-07-13 21:35:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:35:53,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831699432] [2022-07-13 21:35:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:35:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:35:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:35:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9834 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 21:35:56,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:35:56,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831699432] [2022-07-13 21:35:56,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831699432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:35:56,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218131818] [2022-07-13 21:35:56,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 21:35:56,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:35:56,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:35:56,914 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) [2022-07-13 21:35:56,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process