./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/weaver/bench-exp3x3.wvr.c -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 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:20:45,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:20:45,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:20:45,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:20:45,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:20:45,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:20:45,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:20:45,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:20:45,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:20:45,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:20:45,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:20:45,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:20:45,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:20:45,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:20:45,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:20:45,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:20:45,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:20:45,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:20:45,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:20:45,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:20:45,385 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:20:45,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:20:45,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:20:45,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:20:45,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:20:45,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:20:45,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:20:45,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:20:45,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:20:45,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:20:45,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:20:45,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:20:45,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:20:45,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:20:45,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:20:45,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:20:45,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:20:45,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:20:45,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:20:45,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:20:45,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:20:45,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:20:45,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:20:45,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:20:45,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:20:45,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:20:45,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:20:45,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:20:45,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:20:45,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:20:45,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:20:45,429 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:20:45,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:20:45,430 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:20:45,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:20:45,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:20:45,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:20:45,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:20:45,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:20:45,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:20:45,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:20:45,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:20:45,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:20:45,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:20:45,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:20:45,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:20:45,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:20:45,433 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:20:45,433 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:20:45,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:20:45,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2022-07-12 10:20:45,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:20:45,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:20:45,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:20:45,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:20:45,730 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:20:45,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-12 10:20:45,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a6532d7/34df5bee68834002843611ce0a49900a/FLAG782fb735d [2022-07-12 10:20:46,157 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:20:46,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-12 10:20:46,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a6532d7/34df5bee68834002843611ce0a49900a/FLAG782fb735d [2022-07-12 10:20:46,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a6532d7/34df5bee68834002843611ce0a49900a [2022-07-12 10:20:46,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:20:46,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:20:46,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:20:46,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:20:46,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:20:46,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d91e61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46, skipping insertion in model container [2022-07-12 10:20:46,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:20:46,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:20:46,727 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/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-12 10:20:46,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:20:46,734 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:20:46,749 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/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-12 10:20:46,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:20:46,758 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:20:46,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46 WrapperNode [2022-07-12 10:20:46,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:20:46,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:20:46,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:20:46,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:20:46,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,791 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-07-12 10:20:46,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:20:46,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:20:46,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:20:46,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:20:46,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:20:46,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:20:46,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:20:46,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:20:46,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (1/1) ... [2022-07-12 10:20:46,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:20:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:46,867 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) [2022-07-12 10:20:46,872 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 [2022-07-12 10:20:46,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:20:46,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:20:46,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:20:46,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:20:46,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:20:46,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:20:46,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:20:46,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-12 10:20:46,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-12 10:20:46,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:20:46,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-12 10:20:46,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-12 10:20:46,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-07-12 10:20:46,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-07-12 10:20:46,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:20:46,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:20:46,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:20:46,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:20:46,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:20:46,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:20:46,896 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:20:46,960 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:20:46,961 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:20:47,159 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:20:47,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:20:47,166 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:20:47,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:20:47 BoogieIcfgContainer [2022-07-12 10:20:47,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:20:47,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:20:47,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:20:47,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:20:47,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:20:46" (1/3) ... [2022-07-12 10:20:47,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8e2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:20:47, skipping insertion in model container [2022-07-12 10:20:47,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:20:46" (2/3) ... [2022-07-12 10:20:47,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8e2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:20:47, skipping insertion in model container [2022-07-12 10:20:47,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:20:47" (3/3) ... [2022-07-12 10:20:47,188 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2022-07-12 10:20:47,191 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:20:47,197 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:20:47,197 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:20:47,198 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:20:47,247 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-12 10:20:47,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-07-12 10:20:47,329 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-12 10:20:47,329 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:20:47,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-07-12 10:20:47,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2022-07-12 10:20:47,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2022-07-12 10:20:47,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:20:47,354 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@438232ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@747b8e4e [2022-07-12 10:20:47,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:20:47,397 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2022-07-12 10:20:47,397 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:20:47,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:47,398 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:47,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:20:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1805930400, now seen corresponding path program 1 times [2022-07-12 10:20:47,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:47,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014713938] [2022-07-12 10:20:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:47,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014713938] [2022-07-12 10:20:47,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014713938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:47,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:47,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:20:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875126480] [2022-07-12 10:20:47,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:20:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:20:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:20:47,722 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2022-07-12 10:20:47,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 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) [2022-07-12 10:20:47,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:47,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2022-07-12 10:20:47,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:47,777 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2022-07-12 10:20:47,777 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-12 10:20:47,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2022-07-12 10:20:47,780 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2022-07-12 10:20:47,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2022-07-12 10:20:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:20:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:20:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2022-07-12 10:20:47,791 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2022-07-12 10:20:47,791 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2022-07-12 10:20:47,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2022-07-12 10:20:47,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:47,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2022-07-12 10:20:47,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 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) [2022-07-12 10:20:47,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-07-12 10:20:47,805 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2022-07-12 10:20:47,806 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2022-07-12 10:20:47,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2022-07-12 10:20:47,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-07-12 10:20:47,812 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2022-07-12 10:20:47,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2022-07-12 10:20:47,816 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2022-07-12 10:20:47,816 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2022-07-12 10:20:47,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 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) [2022-07-12 10:20:47,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:47,817 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:20:47,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:20:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1921476920, now seen corresponding path program 1 times [2022-07-12 10:20:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014765048] [2022-07-12 10:20:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:48,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:48,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014765048] [2022-07-12 10:20:48,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014765048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:48,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:48,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:20:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979271944] [2022-07-12 10:20:48,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:48,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:20:48,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:20:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:20:48,317 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2022-07-12 10:20:48,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 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) [2022-07-12 10:20:48,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:48,318 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2022-07-12 10:20:48,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:50,190 INFO L129 PetriNetUnfolder]: 13855/19787 cut-off events. [2022-07-12 10:20:50,191 INFO L130 PetriNetUnfolder]: For 728/1092 co-relation queries the response was YES. [2022-07-12 10:20:50,228 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37307 conditions, 19787 events. 13855/19787 cut-off events. For 728/1092 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 113995 event pairs, 8752 based on Foata normal form. 1/13828 useless extension candidates. Maximal degree in co-relation 37304. Up to 10952 conditions per place. [2022-07-12 10:20:50,320 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2022-07-12 10:20:50,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2022-07-12 10:20:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:20:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:20:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2022-07-12 10:20:50,326 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2022-07-12 10:20:50,326 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2022-07-12 10:20:50,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2022-07-12 10:20:50,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:50,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2022-07-12 10:20:50,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 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) [2022-07-12 10:20:50,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 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) [2022-07-12 10:20:50,335 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 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) [2022-07-12 10:20:50,335 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2022-07-12 10:20:50,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2022-07-12 10:20:50,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:20:50,342 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2022-07-12 10:20:50,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2022-07-12 10:20:50,343 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2022-07-12 10:20:50,343 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2022-07-12 10:20:50,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 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) [2022-07-12 10:20:50,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:50,344 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:50,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:20:50,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:20:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:50,348 INFO L85 PathProgramCache]: Analyzing trace with hash 856396636, now seen corresponding path program 1 times [2022-07-12 10:20:50,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:50,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516134378] [2022-07-12 10:20:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:50,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:50,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:50,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516134378] [2022-07-12 10:20:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516134378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:20:50,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834278198] [2022-07-12 10:20:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:20:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:20:50,699 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) [2022-07-12 10:20:50,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:20:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:20:50,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:20:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:51,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:20:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:51,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834278198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:20:51,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:20:51,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:20:51,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010694729] [2022-07-12 10:20:51,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:20:51,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:20:51,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:20:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:20:51,278 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-12 10:20:51,279 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 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) [2022-07-12 10:20:51,279 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:51,279 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-12 10:20:51,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:54,651 INFO L129 PetriNetUnfolder]: 27630/39510 cut-off events. [2022-07-12 10:20:54,652 INFO L130 PetriNetUnfolder]: For 8413/8511 co-relation queries the response was YES. [2022-07-12 10:20:54,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87882 conditions, 39510 events. 27630/39510 cut-off events. For 8413/8511 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 252409 event pairs, 4983 based on Foata normal form. 0/28288 useless extension candidates. Maximal degree in co-relation 87875. Up to 10656 conditions per place. [2022-07-12 10:20:54,915 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 207 selfloop transitions, 30 changer transitions 1/322 dead transitions. [2022-07-12 10:20:54,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 1316 flow [2022-07-12 10:20:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:20:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:20:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1728 transitions. [2022-07-12 10:20:54,919 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7303465765004227 [2022-07-12 10:20:54,919 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1728 transitions. [2022-07-12 10:20:54,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1728 transitions. [2022-07-12 10:20:54,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:54,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1728 transitions. [2022-07-12 10:20:54,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.42857142857143) internal successors, (1728), 14 states have internal predecessors, (1728), 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) [2022-07-12 10:20:54,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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) [2022-07-12 10:20:54,929 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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) [2022-07-12 10:20:54,929 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 14 states and 1728 transitions. [2022-07-12 10:20:54,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 1316 flow [2022-07-12 10:20:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 322 transitions, 1289 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-12 10:20:54,940 INFO L242 Difference]: Finished difference. Result has 162 places, 160 transitions, 522 flow [2022-07-12 10:20:54,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-07-12 10:20:54,942 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 11 predicate places. [2022-07-12 10:20:54,942 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 522 flow [2022-07-12 10:20:54,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 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) [2022-07-12 10:20:54,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:54,945 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:54,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:20:55,155 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 [2022-07-12 10:20:55,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:20:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1314069844, now seen corresponding path program 2 times [2022-07-12 10:20:55,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:55,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642650874] [2022-07-12 10:20:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:55,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642650874] [2022-07-12 10:20:55,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642650874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:55,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:55,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:20:55,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852936136] [2022-07-12 10:20:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:55,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:20:55,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:20:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:20:55,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-12 10:20:55,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:20:55,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:55,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-12 10:20:55,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:20:58,035 INFO L129 PetriNetUnfolder]: 25967/37698 cut-off events. [2022-07-12 10:20:58,036 INFO L130 PetriNetUnfolder]: For 41843/42094 co-relation queries the response was YES. [2022-07-12 10:20:58,178 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103428 conditions, 37698 events. 25967/37698 cut-off events. For 41843/42094 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 245982 event pairs, 2103 based on Foata normal form. 325/30114 useless extension candidates. Maximal degree in co-relation 103415. Up to 27357 conditions per place. [2022-07-12 10:20:58,468 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 98 selfloop transitions, 19 changer transitions 1/202 dead transitions. [2022-07-12 10:20:58,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 924 flow [2022-07-12 10:20:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:20:58,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:20:58,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-12 10:20:58,480 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-12 10:20:58,480 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-12 10:20:58,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-12 10:20:58,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:20:58,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-12 10:20:58,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 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) [2022-07-12 10:20:58,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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) [2022-07-12 10:20:58,501 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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) [2022-07-12 10:20:58,501 INFO L186 Difference]: Start difference. First operand has 162 places, 160 transitions, 522 flow. Second operand 6 states and 738 transitions. [2022-07-12 10:20:58,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 924 flow [2022-07-12 10:20:58,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 202 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:20:58,668 INFO L242 Difference]: Finished difference. Result has 165 places, 166 transitions, 618 flow [2022-07-12 10:20:58,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=165, PETRI_TRANSITIONS=166} [2022-07-12 10:20:58,669 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 14 predicate places. [2022-07-12 10:20:58,670 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 166 transitions, 618 flow [2022-07-12 10:20:58,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:20:58,670 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:20:58,670 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:20:58,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:20:58,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:20:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:20:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash -598835330, now seen corresponding path program 1 times [2022-07-12 10:20:58,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:20:58,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703580308] [2022-07-12 10:20:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:20:58,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:20:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:20:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:20:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:20:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703580308] [2022-07-12 10:20:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703580308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:20:58,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:20:58,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:20:58,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158449054] [2022-07-12 10:20:58,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:20:58,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:20:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:20:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:20:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:20:58,889 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-12 10:20:58,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 166 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:20:58,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:20:58,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-12 10:20:58,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:01,588 INFO L129 PetriNetUnfolder]: 25731/36409 cut-off events. [2022-07-12 10:21:01,588 INFO L130 PetriNetUnfolder]: For 60756/60880 co-relation queries the response was YES. [2022-07-12 10:21:01,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107878 conditions, 36409 events. 25731/36409 cut-off events. For 60756/60880 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 226401 event pairs, 5946 based on Foata normal form. 1/27885 useless extension candidates. Maximal degree in co-relation 107862. Up to 27357 conditions per place. [2022-07-12 10:21:01,863 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 105 selfloop transitions, 27 changer transitions 1/217 dead transitions. [2022-07-12 10:21:01,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1163 flow [2022-07-12 10:21:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:21:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:21:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 739 transitions. [2022-07-12 10:21:01,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7287968441814595 [2022-07-12 10:21:01,865 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 739 transitions. [2022-07-12 10:21:01,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 739 transitions. [2022-07-12 10:21:01,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:01,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 739 transitions. [2022-07-12 10:21:01,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.16666666666667) internal successors, (739), 6 states have internal predecessors, (739), 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) [2022-07-12 10:21:01,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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) [2022-07-12 10:21:01,868 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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) [2022-07-12 10:21:01,868 INFO L186 Difference]: Start difference. First operand has 165 places, 166 transitions, 618 flow. Second operand 6 states and 739 transitions. [2022-07-12 10:21:01,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1163 flow [2022-07-12 10:21:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1100 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-12 10:21:02,044 INFO L242 Difference]: Finished difference. Result has 169 places, 176 transitions, 748 flow [2022-07-12 10:21:02,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=169, PETRI_TRANSITIONS=176} [2022-07-12 10:21:02,045 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 18 predicate places. [2022-07-12 10:21:02,045 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 176 transitions, 748 flow [2022-07-12 10:21:02,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:21:02,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:02,046 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:02,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:21:02,046 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:21:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash -468160624, now seen corresponding path program 2 times [2022-07-12 10:21:02,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:02,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471700459] [2022-07-12 10:21:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:02,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471700459] [2022-07-12 10:21:02,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471700459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:21:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116060491] [2022-07-12 10:21:02,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:21:02,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:21:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:21:02,238 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) [2022-07-12 10:21:02,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:21:02,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:21:02,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:21:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:21:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:21:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:02,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:21:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:02,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116060491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:21:02,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:21:02,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-12 10:21:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642894645] [2022-07-12 10:21:02,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:21:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:21:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:21:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:21:02,889 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-12 10:21:02,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 176 transitions, 748 flow. Second operand has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 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) [2022-07-12 10:21:02,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:02,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-12 10:21:02,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:10,814 INFO L129 PetriNetUnfolder]: 66286/95783 cut-off events. [2022-07-12 10:21:10,814 INFO L130 PetriNetUnfolder]: For 154992/155381 co-relation queries the response was YES. [2022-07-12 10:21:11,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284484 conditions, 95783 events. 66286/95783 cut-off events. For 154992/155381 co-relation queries the response was YES. Maximal size of possible extension queue 4456. Compared 704466 event pairs, 12111 based on Foata normal form. 2409/85526 useless extension candidates. Maximal degree in co-relation 284466. Up to 26948 conditions per place. [2022-07-12 10:21:11,832 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 289 selfloop transitions, 44 changer transitions 1/418 dead transitions. [2022-07-12 10:21:11,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 418 transitions, 2633 flow [2022-07-12 10:21:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:21:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:21:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2022-07-12 10:21:11,836 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7295012679628065 [2022-07-12 10:21:11,836 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2022-07-12 10:21:11,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2022-07-12 10:21:11,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:11,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2022-07-12 10:21:11,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.28571428571429) internal successors, (1726), 14 states have internal predecessors, (1726), 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) [2022-07-12 10:21:11,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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) [2022-07-12 10:21:11,844 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 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) [2022-07-12 10:21:11,844 INFO L186 Difference]: Start difference. First operand has 169 places, 176 transitions, 748 flow. Second operand 14 states and 1726 transitions. [2022-07-12 10:21:11,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 418 transitions, 2633 flow [2022-07-12 10:21:12,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 418 transitions, 2606 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:21:12,681 INFO L242 Difference]: Finished difference. Result has 186 places, 190 transitions, 950 flow [2022-07-12 10:21:12,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=950, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2022-07-12 10:21:12,683 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 35 predicate places. [2022-07-12 10:21:12,683 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 950 flow [2022-07-12 10:21:12,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 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) [2022-07-12 10:21:12,684 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:12,685 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:12,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:21:12,904 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,SelfDestructingSolverStorable5 [2022-07-12 10:21:12,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:21:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash 601801034, now seen corresponding path program 1 times [2022-07-12 10:21:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:12,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032203992] [2022-07-12 10:21:12,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:13,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032203992] [2022-07-12 10:21:13,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032203992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:13,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:13,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:21:13,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966905667] [2022-07-12 10:21:13,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:13,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:21:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:21:13,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:21:13,118 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-12 10:21:13,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 950 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:21:13,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:13,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-12 10:21:13,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:21:21,269 INFO L129 PetriNetUnfolder]: 65079/94562 cut-off events. [2022-07-12 10:21:21,269 INFO L130 PetriNetUnfolder]: For 278930/279421 co-relation queries the response was YES. [2022-07-12 10:21:21,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325402 conditions, 94562 events. 65079/94562 cut-off events. For 278930/279421 co-relation queries the response was YES. Maximal size of possible extension queue 4654. Compared 705855 event pairs, 30842 based on Foata normal form. 246/82525 useless extension candidates. Maximal degree in co-relation 325378. Up to 76664 conditions per place. [2022-07-12 10:21:22,454 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 120 selfloop transitions, 35 changer transitions 1/240 dead transitions. [2022-07-12 10:21:22,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 240 transitions, 1592 flow [2022-07-12 10:21:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:21:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:21:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-12 10:21:22,457 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-12 10:21:22,457 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-12 10:21:22,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-12 10:21:22,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:21:22,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-12 10:21:22,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 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) [2022-07-12 10:21:22,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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) [2022-07-12 10:21:22,460 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 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) [2022-07-12 10:21:22,460 INFO L186 Difference]: Start difference. First operand has 186 places, 190 transitions, 950 flow. Second operand 6 states and 738 transitions. [2022-07-12 10:21:22,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 240 transitions, 1592 flow [2022-07-12 10:21:23,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 240 transitions, 1543 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-12 10:21:23,157 INFO L242 Difference]: Finished difference. Result has 188 places, 200 transitions, 1146 flow [2022-07-12 10:21:23,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=188, PETRI_TRANSITIONS=200} [2022-07-12 10:21:23,158 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 37 predicate places. [2022-07-12 10:21:23,158 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 200 transitions, 1146 flow [2022-07-12 10:21:23,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:21:23,159 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:21:23,159 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:21:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:21:23,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:21:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:21:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1026495128, now seen corresponding path program 1 times [2022-07-12 10:21:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:21:23,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767316156] [2022-07-12 10:21:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:21:23,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:21:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:21:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:21:23,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:21:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767316156] [2022-07-12 10:21:23,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767316156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:21:23,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:21:23,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:21:23,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730475267] [2022-07-12 10:21:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:21:23,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:21:23,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:21:23,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:21:23,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:21:23,380 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-12 10:21:23,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 200 transitions, 1146 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 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) [2022-07-12 10:21:23,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:21:23,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-12 10:21:23,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand