./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:33:48,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:33:48,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:33:48,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:33:48,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:33:48,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:33:48,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:33:48,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:33:48,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:33:48,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:33:48,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:33:48,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:33:48,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:33:48,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:33:48,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:33:48,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:33:48,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:33:48,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:33:48,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:33:48,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:33:48,713 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:33:48,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:33:48,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:33:48,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:33:48,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:33:48,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:33:48,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:33:48,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:33:48,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:33:48,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:33:48,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:33:48,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:33:48,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:33:48,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:33:48,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:33:48,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:33:48,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:33:48,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:33:48,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:33:48,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:33:48,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:33:48,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:33:48,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:33:48,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:33:48,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:33:48,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:33:48,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:33:48,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:33:48,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:33:48,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:33:48,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:33:48,758 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:33:48,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:33:48,759 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:33:48,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:33:48,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:33:48,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:33:48,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:33:48,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:33:48,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:33:48,760 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:33:48,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:33:48,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:33:48,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:33:48,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:33:48,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:33:48,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:33:48,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:33:48,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:33:48,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:33:48,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:33:48,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:33:48,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:33:48,763 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:33:48,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:33:48,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:33:48,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-07-19 21:33:48,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:33:48,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:33:48,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:33:48,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:33:48,990 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:33:48,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-19 21:33:49,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e44fd914/15d82d91c1874f799e8ff99efd68e96b/FLAG755ca4c73 [2022-07-19 21:33:49,368 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:33:49,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-19 21:33:49,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e44fd914/15d82d91c1874f799e8ff99efd68e96b/FLAG755ca4c73 [2022-07-19 21:33:49,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e44fd914/15d82d91c1874f799e8ff99efd68e96b [2022-07-19 21:33:49,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:33:49,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:33:49,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:33:49,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:33:49,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:33:49,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47407284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49, skipping insertion in model container [2022-07-19 21:33:49,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:33:49,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:33:49,950 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/popl20-figure3.wvr.c[2121,2134] [2022-07-19 21:33:49,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:33:49,956 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:33:49,968 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/popl20-figure3.wvr.c[2121,2134] [2022-07-19 21:33:49,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:33:49,978 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:33:49,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49 WrapperNode [2022-07-19 21:33:49,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:33:49,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:33:49,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:33:49,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:33:49,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:49,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,008 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-07-19 21:33:50,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:33:50,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:33:50,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:33:50,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:33:50,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:33:50,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:33:50,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:33:50,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:33:50,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (1/1) ... [2022-07-19 21:33:50,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:33:50,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:50,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:33:50,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:33:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:33:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:33:50,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:33:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:33:50,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:33:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:33:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:33:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:33:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:33:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:33:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:33:50,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:33:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:33:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:33:50,114 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:33:50,162 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:33:50,163 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:33:50,299 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:33:50,318 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:33:50,318 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:33:50,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:50 BoogieIcfgContainer [2022-07-19 21:33:50,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:33:50,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:33:50,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:33:50,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:33:50,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:33:49" (1/3) ... [2022-07-19 21:33:50,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14330ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:50, skipping insertion in model container [2022-07-19 21:33:50,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:33:49" (2/3) ... [2022-07-19 21:33:50,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14330ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:33:50, skipping insertion in model container [2022-07-19 21:33:50,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:33:50" (3/3) ... [2022-07-19 21:33:50,326 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-07-19 21:33:50,329 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:33:50,336 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:33:50,336 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:33:50,336 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:33:50,374 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:33:50,419 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-19 21:33:50,471 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-19 21:33:50,471 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:33:50,473 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-07-19 21:33:50,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-19 21:33:50,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-19 21:33:50,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:33:50,505 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@7b636c18, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@566eb1c7 [2022-07-19 21:33:50,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:33:50,531 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-19 21:33:50,534 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:33:50,534 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:50,535 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] [2022-07-19 21:33:50,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-07-19 21:33:50,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069747255] [2022-07-19 21:33:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:50,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:50,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069747255] [2022-07-19 21:33:50,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069747255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:50,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:50,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430119731] [2022-07-19 21:33:50,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:50,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:50,871 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:33:50,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:50,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:50,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:33:50,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:50,989 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-19 21:33:50,989 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-19 21:33:50,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 110 events. 8/110 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 1 based on Foata normal form. 15/117 useless extension candidates. Maximal degree in co-relation 62. Up to 18 conditions per place. [2022-07-19 21:33:50,992 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 15 selfloop transitions, 2 changer transitions 8/80 dead transitions. [2022-07-19 21:33:50,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 231 flow [2022-07-19 21:33:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:33:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:33:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-07-19 21:33:51,008 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8029556650246306 [2022-07-19 21:33:51,009 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-07-19 21:33:51,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-07-19 21:33:51,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:51,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-07-19 21:33:51,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,026 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,027 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 7 states and 489 transitions. [2022-07-19 21:33:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 231 flow [2022-07-19 21:33:51,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 217 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:33:51,038 INFO L242 Difference]: Finished difference. Result has 82 places, 71 transitions, 162 flow [2022-07-19 21:33:51,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2022-07-19 21:33:51,042 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-07-19 21:33:51,043 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 162 flow [2022-07-19 21:33:51,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:51,044 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] [2022-07-19 21:33:51,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:33:51,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2080326486, now seen corresponding path program 1 times [2022-07-19 21:33:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:51,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658708449] [2022-07-19 21:33:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658708449] [2022-07-19 21:33:51,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658708449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:51,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:51,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724850046] [2022-07-19 21:33:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:51,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:51,156 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:33:51,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:51,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:33:51,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:51,273 INFO L129 PetriNetUnfolder]: 74/272 cut-off events. [2022-07-19 21:33:51,273 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 21:33:51,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 272 events. 74/272 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1161 event pairs, 22 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 468. Up to 95 conditions per place. [2022-07-19 21:33:51,275 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 31 selfloop transitions, 7 changer transitions 4/96 dead transitions. [2022-07-19 21:33:51,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 305 flow [2022-07-19 21:33:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:33:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:33:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2022-07-19 21:33:51,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482758620689655 [2022-07-19 21:33:51,277 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2022-07-19 21:33:51,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2022-07-19 21:33:51,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:51,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2022-07-19 21:33:51,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,279 INFO L186 Difference]: Start difference. First operand has 82 places, 71 transitions, 162 flow. Second operand 5 states and 369 transitions. [2022-07-19 21:33:51,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 305 flow [2022-07-19 21:33:51,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 299 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:51,282 INFO L242 Difference]: Finished difference. Result has 80 places, 77 transitions, 207 flow [2022-07-19 21:33:51,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-07-19 21:33:51,283 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-07-19 21:33:51,283 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 207 flow [2022-07-19 21:33:51,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,283 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:51,283 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] [2022-07-19 21:33:51,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:33:51,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1370932692, now seen corresponding path program 2 times [2022-07-19 21:33:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:51,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48065566] [2022-07-19 21:33:51,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:51,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48065566] [2022-07-19 21:33:51,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48065566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:51,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695659489] [2022-07-19 21:33:51,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:33:51,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:51,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:51,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:51,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:33:51,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:33:51,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:33:51,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695659489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:51,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:33:51,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-19 21:33:51,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498067232] [2022-07-19 21:33:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:51,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:33:51,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:33:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:33:51,572 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-07-19 21:33:51,572 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,572 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:51,573 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-07-19 21:33:51,573 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:51,622 INFO L129 PetriNetUnfolder]: 64/245 cut-off events. [2022-07-19 21:33:51,623 INFO L130 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2022-07-19 21:33:51,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 245 events. 64/245 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1064 event pairs, 19 based on Foata normal form. 7/239 useless extension candidates. Maximal degree in co-relation 365. Up to 74 conditions per place. [2022-07-19 21:33:51,641 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 23 selfloop transitions, 7 changer transitions 3/92 dead transitions. [2022-07-19 21:33:51,641 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 329 flow [2022-07-19 21:33:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:33:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:33:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2022-07-19 21:33:51,642 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2022-07-19 21:33:51,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2022-07-19 21:33:51,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2022-07-19 21:33:51,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:51,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2022-07-19 21:33:51,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,645 INFO L186 Difference]: Start difference. First operand has 80 places, 77 transitions, 207 flow. Second operand 4 states and 302 transitions. [2022-07-19 21:33:51,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 329 flow [2022-07-19 21:33:51,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:33:51,648 INFO L242 Difference]: Finished difference. Result has 86 places, 81 transitions, 263 flow [2022-07-19 21:33:51,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2022-07-19 21:33:51,648 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2022-07-19 21:33:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 263 flow [2022-07-19 21:33:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:51,649 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] [2022-07-19 21:33:51,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:51,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:51,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1132170860, now seen corresponding path program 3 times [2022-07-19 21:33:51,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:51,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780208785] [2022-07-19 21:33:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:51,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:51,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:51,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780208785] [2022-07-19 21:33:51,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780208785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:51,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:51,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:33:51,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564271727] [2022-07-19 21:33:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:51,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:33:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:33:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:33:51,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:33:51,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:51,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:51,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:33:51,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:52,044 INFO L129 PetriNetUnfolder]: 127/424 cut-off events. [2022-07-19 21:33:52,044 INFO L130 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2022-07-19 21:33:52,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 424 events. 127/424 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2139 event pairs, 52 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 752. Up to 125 conditions per place. [2022-07-19 21:33:52,047 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 4/104 dead transitions. [2022-07-19 21:33:52,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 460 flow [2022-07-19 21:33:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:33:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:33:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-07-19 21:33:52,049 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-07-19 21:33:52,049 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-07-19 21:33:52,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-07-19 21:33:52,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:52,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-07-19 21:33:52,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,052 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,052 INFO L186 Difference]: Start difference. First operand has 86 places, 81 transitions, 263 flow. Second operand 6 states and 429 transitions. [2022-07-19 21:33:52,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 460 flow [2022-07-19 21:33:52,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 452 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-19 21:33:52,055 INFO L242 Difference]: Finished difference. Result has 94 places, 83 transitions, 305 flow [2022-07-19 21:33:52,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2022-07-19 21:33:52,056 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2022-07-19 21:33:52,056 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 305 flow [2022-07-19 21:33:52,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:52,057 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] [2022-07-19 21:33:52,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:33:52,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1391320060, now seen corresponding path program 4 times [2022-07-19 21:33:52,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:52,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525215958] [2022-07-19 21:33:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525215958] [2022-07-19 21:33:52,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525215958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:52,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775034472] [2022-07-19 21:33:52,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:33:52,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:52,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:52,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:33:52,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:33:52,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:33:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775034472] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:52,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:52,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-19 21:33:52,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094728951] [2022-07-19 21:33:52,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:52,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:33:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:33:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:33:52,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:33:52,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:52,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:33:52,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:52,510 INFO L129 PetriNetUnfolder]: 209/644 cut-off events. [2022-07-19 21:33:52,510 INFO L130 PetriNetUnfolder]: For 775/784 co-relation queries the response was YES. [2022-07-19 21:33:52,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 644 events. 209/644 cut-off events. For 775/784 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3836 event pairs, 19 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 1171. Up to 100 conditions per place. [2022-07-19 21:33:52,514 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 53 selfloop transitions, 36 changer transitions 10/153 dead transitions. [2022-07-19 21:33:52,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 848 flow [2022-07-19 21:33:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:33:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:33:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 736 transitions. [2022-07-19 21:33:52,516 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459770114942529 [2022-07-19 21:33:52,516 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 736 transitions. [2022-07-19 21:33:52,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 736 transitions. [2022-07-19 21:33:52,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:52,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 736 transitions. [2022-07-19 21:33:52,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,519 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,519 INFO L186 Difference]: Start difference. First operand has 94 places, 83 transitions, 305 flow. Second operand 10 states and 736 transitions. [2022-07-19 21:33:52,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 848 flow [2022-07-19 21:33:52,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 817 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:52,523 INFO L242 Difference]: Finished difference. Result has 108 places, 107 transitions, 610 flow [2022-07-19 21:33:52,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2022-07-19 21:33:52,524 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 31 predicate places. [2022-07-19 21:33:52,524 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 610 flow [2022-07-19 21:33:52,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:52,525 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] [2022-07-19 21:33:52,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:52,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:52,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:52,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2053154838, now seen corresponding path program 5 times [2022-07-19 21:33:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:52,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283967587] [2022-07-19 21:33:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:52,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:52,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283967587] [2022-07-19 21:33:52,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283967587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:33:52,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:33:52,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:33:52,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100021643] [2022-07-19 21:33:52,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:33:52,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:33:52,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:33:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:33:52,800 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-19 21:33:52,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:52,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-19 21:33:52,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:52,910 INFO L129 PetriNetUnfolder]: 207/624 cut-off events. [2022-07-19 21:33:52,910 INFO L130 PetriNetUnfolder]: For 1956/1960 co-relation queries the response was YES. [2022-07-19 21:33:52,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 624 events. 207/624 cut-off events. For 1956/1960 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3659 event pairs, 81 based on Foata normal form. 8/621 useless extension candidates. Maximal degree in co-relation 1629. Up to 229 conditions per place. [2022-07-19 21:33:52,915 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 47 selfloop transitions, 27 changer transitions 7/135 dead transitions. [2022-07-19 21:33:52,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 946 flow [2022-07-19 21:33:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:33:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:33:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 442 transitions. [2022-07-19 21:33:52,917 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8467432950191571 [2022-07-19 21:33:52,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 442 transitions. [2022-07-19 21:33:52,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 442 transitions. [2022-07-19 21:33:52,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:52,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 442 transitions. [2022-07-19 21:33:52,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,919 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,919 INFO L186 Difference]: Start difference. First operand has 108 places, 107 transitions, 610 flow. Second operand 6 states and 442 transitions. [2022-07-19 21:33:52,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 946 flow [2022-07-19 21:33:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 920 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-19 21:33:52,927 INFO L242 Difference]: Finished difference. Result has 115 places, 111 transitions, 710 flow [2022-07-19 21:33:52,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=710, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2022-07-19 21:33:52,927 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2022-07-19 21:33:52,928 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 710 flow [2022-07-19 21:33:52,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:52,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:52,928 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] [2022-07-19 21:33:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:33:52,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-07-19 21:33:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:52,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292038288] [2022-07-19 21:33:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:53,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:53,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292038288] [2022-07-19 21:33:53,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292038288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:53,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144624350] [2022-07-19 21:33:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:53,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:53,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:53,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:33:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 21:33:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:33:53,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:33:53,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144624350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:53,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:53,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-07-19 21:33:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711072822] [2022-07-19 21:33:53,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:33:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:33:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:33:53,240 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:33:53,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:53,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:33:53,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:53,345 INFO L129 PetriNetUnfolder]: 108/637 cut-off events. [2022-07-19 21:33:53,345 INFO L130 PetriNetUnfolder]: For 1574/1604 co-relation queries the response was YES. [2022-07-19 21:33:53,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 637 events. 108/637 cut-off events. For 1574/1604 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 18 based on Foata normal form. 12/639 useless extension candidates. Maximal degree in co-relation 1476. Up to 88 conditions per place. [2022-07-19 21:33:53,350 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 23 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2022-07-19 21:33:53,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 818 flow [2022-07-19 21:33:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:33:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:33:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-07-19 21:33:53,352 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-07-19 21:33:53,352 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-07-19 21:33:53,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-07-19 21:33:53,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:53,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-07-19 21:33:53,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,354 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,354 INFO L186 Difference]: Start difference. First operand has 115 places, 111 transitions, 710 flow. Second operand 7 states and 476 transitions. [2022-07-19 21:33:53,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 818 flow [2022-07-19 21:33:53,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 755 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-19 21:33:53,361 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 691 flow [2022-07-19 21:33:53,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-07-19 21:33:53,362 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-19 21:33:53,362 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 691 flow [2022-07-19 21:33:53,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,362 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:53,362 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:53,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:53,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:53,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2121607920, now seen corresponding path program 2 times [2022-07-19 21:33:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:53,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955259874] [2022-07-19 21:33:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955259874] [2022-07-19 21:33:53,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955259874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:53,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976077729] [2022-07-19 21:33:53,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:33:53,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:53,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:53,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:53,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:33:53,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:33:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:33:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:53,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:53,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976077729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:53,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:53,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:33:53,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515070610] [2022-07-19 21:33:53,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:53,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:33:53,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:53,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:33:53,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:33:53,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:33:53,981 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 691 flow. Second operand has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:53,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:53,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:33:53,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:56,333 INFO L129 PetriNetUnfolder]: 883/2531 cut-off events. [2022-07-19 21:33:56,334 INFO L130 PetriNetUnfolder]: For 6718/6737 co-relation queries the response was YES. [2022-07-19 21:33:56,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8330 conditions, 2531 events. 883/2531 cut-off events. For 6718/6737 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19769 event pairs, 62 based on Foata normal form. 32/2548 useless extension candidates. Maximal degree in co-relation 8273. Up to 294 conditions per place. [2022-07-19 21:33:56,352 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 173 selfloop transitions, 210 changer transitions 24/461 dead transitions. [2022-07-19 21:33:56,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 461 transitions, 3794 flow [2022-07-19 21:33:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-19 21:33:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-19 21:33:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4883 transitions. [2022-07-19 21:33:56,361 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7795338441890166 [2022-07-19 21:33:56,361 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4883 transitions. [2022-07-19 21:33:56,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4883 transitions. [2022-07-19 21:33:56,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:56,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4883 transitions. [2022-07-19 21:33:56,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 67.81944444444444) internal successors, (4883), 72 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,382 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,382 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 691 flow. Second operand 72 states and 4883 transitions. [2022-07-19 21:33:56,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 461 transitions, 3794 flow [2022-07-19 21:33:56,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 461 transitions, 3726 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-07-19 21:33:56,405 INFO L242 Difference]: Finished difference. Result has 218 places, 299 transitions, 2745 flow [2022-07-19 21:33:56,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2745, PETRI_PLACES=218, PETRI_TRANSITIONS=299} [2022-07-19 21:33:56,408 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 141 predicate places. [2022-07-19 21:33:56,408 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 299 transitions, 2745 flow [2022-07-19 21:33:56,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,409 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:56,409 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:56,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:33:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:56,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1078465688, now seen corresponding path program 3 times [2022-07-19 21:33:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:56,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057912741] [2022-07-19 21:33:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:56,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057912741] [2022-07-19 21:33:56,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057912741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:56,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744044585] [2022-07-19 21:33:56,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:33:56,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:56,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:56,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:56,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:33:56,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:33:56,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:56,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:33:56,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:56,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:56,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744044585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:56,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:56,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-19 21:33:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817331106] [2022-07-19 21:33:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:33:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:33:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:33:56,978 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:33:56,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 299 transitions, 2745 flow. Second operand has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:56,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:56,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:33:56,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:33:58,338 INFO L129 PetriNetUnfolder]: 1220/3244 cut-off events. [2022-07-19 21:33:58,338 INFO L130 PetriNetUnfolder]: For 34165/34183 co-relation queries the response was YES. [2022-07-19 21:33:58,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 3244 events. 1220/3244 cut-off events. For 34165/34183 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 26181 event pairs, 58 based on Foata normal form. 36/3258 useless extension candidates. Maximal degree in co-relation 15734. Up to 438 conditions per place. [2022-07-19 21:33:58,372 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 171 selfloop transitions, 431 changer transitions 12/668 dead transitions. [2022-07-19 21:33:58,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 668 transitions, 8330 flow [2022-07-19 21:33:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-19 21:33:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-19 21:33:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3176 transitions. [2022-07-19 21:33:58,378 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767180239667401 [2022-07-19 21:33:58,378 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3176 transitions. [2022-07-19 21:33:58,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3176 transitions. [2022-07-19 21:33:58,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:33:58,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3176 transitions. [2022-07-19 21:33:58,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.57446808510639) internal successors, (3176), 47 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,388 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,388 INFO L186 Difference]: Start difference. First operand has 218 places, 299 transitions, 2745 flow. Second operand 47 states and 3176 transitions. [2022-07-19 21:33:58,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 668 transitions, 8330 flow [2022-07-19 21:33:58,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 668 transitions, 7510 flow, removed 346 selfloop flow, removed 6 redundant places. [2022-07-19 21:33:58,515 INFO L242 Difference]: Finished difference. Result has 284 places, 547 transitions, 6270 flow [2022-07-19 21:33:58,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6270, PETRI_PLACES=284, PETRI_TRANSITIONS=547} [2022-07-19 21:33:58,516 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 207 predicate places. [2022-07-19 21:33:58,516 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 547 transitions, 6270 flow [2022-07-19 21:33:58,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:58,516 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:33:58,517 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:33:58,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 21:33:58,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:58,749 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:33:58,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:33:58,749 INFO L85 PathProgramCache]: Analyzing trace with hash -599658512, now seen corresponding path program 4 times [2022-07-19 21:33:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:33:58,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280273253] [2022-07-19 21:33:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:33:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:33:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:33:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:58,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:33:58,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280273253] [2022-07-19 21:33:58,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280273253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:33:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243279662] [2022-07-19 21:33:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:33:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:33:58,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:33:58,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:33:58,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:33:58,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:33:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:33:58,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:33:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:33:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:59,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:33:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:33:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243279662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:33:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:33:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-19 21:33:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145956743] [2022-07-19 21:33:59,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:33:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:33:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:33:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:33:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:33:59,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:33:59,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 547 transitions, 6270 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:33:59,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:33:59,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:33:59,116 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:00,507 INFO L129 PetriNetUnfolder]: 1238/3407 cut-off events. [2022-07-19 21:34:00,507 INFO L130 PetriNetUnfolder]: For 62138/62174 co-relation queries the response was YES. [2022-07-19 21:34:00,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20630 conditions, 3407 events. 1238/3407 cut-off events. For 62138/62174 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 28274 event pairs, 77 based on Foata normal form. 15/3388 useless extension candidates. Maximal degree in co-relation 19180. Up to 544 conditions per place. [2022-07-19 21:34:00,584 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 341 selfloop transitions, 279 changer transitions 42/716 dead transitions. [2022-07-19 21:34:00,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 716 transitions, 10316 flow [2022-07-19 21:34:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 21:34:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-19 21:34:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2574 transitions. [2022-07-19 21:34:00,592 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.778584392014519 [2022-07-19 21:34:00,592 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2574 transitions. [2022-07-19 21:34:00,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2574 transitions. [2022-07-19 21:34:00,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:00,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2574 transitions. [2022-07-19 21:34:00,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.73684210526316) internal successors, (2574), 38 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,618 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,618 INFO L186 Difference]: Start difference. First operand has 284 places, 547 transitions, 6270 flow. Second operand 38 states and 2574 transitions. [2022-07-19 21:34:00,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 716 transitions, 10316 flow [2022-07-19 21:34:00,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 716 transitions, 9327 flow, removed 350 selfloop flow, removed 2 redundant places. [2022-07-19 21:34:00,838 INFO L242 Difference]: Finished difference. Result has 332 places, 584 transitions, 6655 flow [2022-07-19 21:34:00,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6655, PETRI_PLACES=332, PETRI_TRANSITIONS=584} [2022-07-19 21:34:00,839 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 255 predicate places. [2022-07-19 21:34:00,839 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 584 transitions, 6655 flow [2022-07-19 21:34:00,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:00,839 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:00,840 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:00,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:01,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:01,055 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash -907958500, now seen corresponding path program 5 times [2022-07-19 21:34:01,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:01,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633171165] [2022-07-19 21:34:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:01,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:01,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633171165] [2022-07-19 21:34:01,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633171165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9914996] [2022-07-19 21:34:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:34:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:01,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:01,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:34:01,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:34:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:01,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 21:34:01,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:01,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:01,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9914996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:01,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:01,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2022-07-19 21:34:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232503743] [2022-07-19 21:34:01,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:01,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 21:34:01,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 21:34:01,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-07-19 21:34:01,646 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:34:01,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 584 transitions, 6655 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:01,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:01,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:34:01,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:03,032 INFO L129 PetriNetUnfolder]: 1514/4097 cut-off events. [2022-07-19 21:34:03,032 INFO L130 PetriNetUnfolder]: For 81650/81663 co-relation queries the response was YES. [2022-07-19 21:34:03,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25293 conditions, 4097 events. 1514/4097 cut-off events. For 81650/81663 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 34473 event pairs, 121 based on Foata normal form. 10/4100 useless extension candidates. Maximal degree in co-relation 24928. Up to 798 conditions per place. [2022-07-19 21:34:03,098 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 365 selfloop transitions, 429 changer transitions 5/853 dead transitions. [2022-07-19 21:34:03,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 853 transitions, 11707 flow [2022-07-19 21:34:03,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 21:34:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-19 21:34:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1887 transitions. [2022-07-19 21:34:03,101 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7746305418719212 [2022-07-19 21:34:03,101 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1887 transitions. [2022-07-19 21:34:03,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1887 transitions. [2022-07-19 21:34:03,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:03,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1887 transitions. [2022-07-19 21:34:03,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.39285714285714) internal successors, (1887), 28 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:03,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:03,107 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:03,108 INFO L186 Difference]: Start difference. First operand has 332 places, 584 transitions, 6655 flow. Second operand 28 states and 1887 transitions. [2022-07-19 21:34:03,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 853 transitions, 11707 flow [2022-07-19 21:34:03,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 853 transitions, 11412 flow, removed 109 selfloop flow, removed 6 redundant places. [2022-07-19 21:34:03,479 INFO L242 Difference]: Finished difference. Result has 357 places, 746 transitions, 10190 flow [2022-07-19 21:34:03,480 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10190, PETRI_PLACES=357, PETRI_TRANSITIONS=746} [2022-07-19 21:34:03,480 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 280 predicate places. [2022-07-19 21:34:03,480 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 746 transitions, 10190 flow [2022-07-19 21:34:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:03,481 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:03,482 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:03,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:03,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:03,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash 996319846, now seen corresponding path program 6 times [2022-07-19 21:34:03,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:03,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360296161] [2022-07-19 21:34:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:03,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360296161] [2022-07-19 21:34:03,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360296161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:03,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552633365] [2022-07-19 21:34:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:34:03,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:03,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:03,915 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:03,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:34:03,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:34:03,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:34:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:04,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:04,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552633365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:04,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:04,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-19 21:34:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988156256] [2022-07-19 21:34:04,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:04,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:34:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:34:04,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:34:04,178 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:34:04,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 746 transitions, 10190 flow. Second operand has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:04,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:04,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:34:04,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:08,103 INFO L129 PetriNetUnfolder]: 2382/6414 cut-off events. [2022-07-19 21:34:08,103 INFO L130 PetriNetUnfolder]: For 156511/156537 co-relation queries the response was YES. [2022-07-19 21:34:08,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43397 conditions, 6414 events. 2382/6414 cut-off events. For 156511/156537 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 59614 event pairs, 33 based on Foata normal form. 32/6420 useless extension candidates. Maximal degree in co-relation 42984. Up to 750 conditions per place. [2022-07-19 21:34:08,202 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 289 selfloop transitions, 1096 changer transitions 5/1444 dead transitions. [2022-07-19 21:34:08,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1444 transitions, 24022 flow [2022-07-19 21:34:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-19 21:34:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-07-19 21:34:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7224 transitions. [2022-07-19 21:34:08,210 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-07-19 21:34:08,211 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7224 transitions. [2022-07-19 21:34:08,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7224 transitions. [2022-07-19 21:34:08,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:08,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7224 transitions. [2022-07-19 21:34:08,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.88888888888889) internal successors, (7224), 108 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:08,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:08,231 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:08,231 INFO L186 Difference]: Start difference. First operand has 357 places, 746 transitions, 10190 flow. Second operand 108 states and 7224 transitions. [2022-07-19 21:34:08,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1444 transitions, 24022 flow [2022-07-19 21:34:09,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1444 transitions, 22667 flow, removed 629 selfloop flow, removed 7 redundant places. [2022-07-19 21:34:09,200 INFO L242 Difference]: Finished difference. Result has 487 places, 1261 transitions, 20726 flow [2022-07-19 21:34:09,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=20726, PETRI_PLACES=487, PETRI_TRANSITIONS=1261} [2022-07-19 21:34:09,201 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 410 predicate places. [2022-07-19 21:34:09,201 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1261 transitions, 20726 flow [2022-07-19 21:34:09,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:09,202 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:09,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:34:09,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:34:09,419 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 356696528, now seen corresponding path program 7 times [2022-07-19 21:34:09,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373365578] [2022-07-19 21:34:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:09,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:09,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373365578] [2022-07-19 21:34:09,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373365578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:09,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267520875] [2022-07-19 21:34:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:34:09,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:09,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:09,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:34:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:09,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:34:09,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:09,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:09,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267520875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:09,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:09,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:34:09,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94553112] [2022-07-19 21:34:09,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:09,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:34:09,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:34:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:34:09,791 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:34:09,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1261 transitions, 20726 flow. Second operand has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:09,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:09,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:34:09,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:14,107 INFO L129 PetriNetUnfolder]: 3289/8637 cut-off events. [2022-07-19 21:34:14,108 INFO L130 PetriNetUnfolder]: For 260282/260321 co-relation queries the response was YES. [2022-07-19 21:34:14,207 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66445 conditions, 8637 events. 3289/8637 cut-off events. For 260282/260321 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 84543 event pairs, 120 based on Foata normal form. 51/8596 useless extension candidates. Maximal degree in co-relation 66002. Up to 1078 conditions per place. [2022-07-19 21:34:14,336 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 352 selfloop transitions, 1545 changer transitions 3/1954 dead transitions. [2022-07-19 21:34:14,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1954 transitions, 36611 flow [2022-07-19 21:34:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-19 21:34:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-19 21:34:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4171 transitions. [2022-07-19 21:34:14,344 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7732665925101965 [2022-07-19 21:34:14,345 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4171 transitions. [2022-07-19 21:34:14,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4171 transitions. [2022-07-19 21:34:14,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:14,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4171 transitions. [2022-07-19 21:34:14,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.2741935483871) internal successors, (4171), 62 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:14,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:14,358 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:14,358 INFO L186 Difference]: Start difference. First operand has 487 places, 1261 transitions, 20726 flow. Second operand 62 states and 4171 transitions. [2022-07-19 21:34:14,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1954 transitions, 36611 flow [2022-07-19 21:34:16,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1954 transitions, 34119 flow, removed 1110 selfloop flow, removed 8 redundant places. [2022-07-19 21:34:16,235 INFO L242 Difference]: Finished difference. Result has 569 places, 1846 transitions, 34105 flow [2022-07-19 21:34:16,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=19253, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=34105, PETRI_PLACES=569, PETRI_TRANSITIONS=1846} [2022-07-19 21:34:16,237 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 492 predicate places. [2022-07-19 21:34:16,237 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1846 transitions, 34105 flow [2022-07-19 21:34:16,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:16,238 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:16,238 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:16,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:16,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:34:16,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 768637718, now seen corresponding path program 8 times [2022-07-19 21:34:16,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530090126] [2022-07-19 21:34:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:16,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:16,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:16,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530090126] [2022-07-19 21:34:16,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530090126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:16,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986210574] [2022-07-19 21:34:16,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:34:16,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:16,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:16,564 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:16,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:34:16,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:34:16,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:16,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:34:16,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986210574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:16,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:34:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414881463] [2022-07-19 21:34:16,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:16,784 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:34:16,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1846 transitions, 34105 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:16,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:16,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:34:16,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:23,681 INFO L129 PetriNetUnfolder]: 4079/10778 cut-off events. [2022-07-19 21:34:23,681 INFO L130 PetriNetUnfolder]: For 303815/303840 co-relation queries the response was YES. [2022-07-19 21:34:23,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83501 conditions, 10778 events. 4079/10778 cut-off events. For 303815/303840 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 111162 event pairs, 86 based on Foata normal form. 31/10762 useless extension candidates. Maximal degree in co-relation 83132. Up to 1331 conditions per place. [2022-07-19 21:34:23,870 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 313 selfloop transitions, 2117 changer transitions 3/2487 dead transitions. [2022-07-19 21:34:23,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 2487 transitions, 50680 flow [2022-07-19 21:34:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-19 21:34:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-19 21:34:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-07-19 21:34:23,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-07-19 21:34:23,874 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-07-19 21:34:23,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-07-19 21:34:23,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:23,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-07-19 21:34:23,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:23,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:23,885 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:23,885 INFO L186 Difference]: Start difference. First operand has 569 places, 1846 transitions, 34105 flow. Second operand 79 states and 5263 transitions. [2022-07-19 21:34:23,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 2487 transitions, 50680 flow [2022-07-19 21:34:27,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2487 transitions, 50128 flow, removed 149 selfloop flow, removed 13 redundant places. [2022-07-19 21:34:27,224 INFO L242 Difference]: Finished difference. Result has 666 places, 2387 transitions, 50391 flow [2022-07-19 21:34:27,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33652, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=50391, PETRI_PLACES=666, PETRI_TRANSITIONS=2387} [2022-07-19 21:34:27,226 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-19 21:34:27,226 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2387 transitions, 50391 flow [2022-07-19 21:34:27,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:27,227 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:27,227 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:27,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:27,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 21:34:27,444 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1627796726, now seen corresponding path program 9 times [2022-07-19 21:34:27,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:27,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084317506] [2022-07-19 21:34:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:27,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:27,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084317506] [2022-07-19 21:34:27,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084317506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:27,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460145885] [2022-07-19 21:34:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:34:27,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:27,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:27,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:27,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:34:27,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 21:34:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:34:27,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:27,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:27,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460145885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:27,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:27,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:34:27,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876213168] [2022-07-19 21:34:27,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:27,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:34:27,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:27,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:34:27,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:34:27,807 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:34:27,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2387 transitions, 50391 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:27,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:27,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:34:27,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:36,004 INFO L129 PetriNetUnfolder]: 4231/11248 cut-off events. [2022-07-19 21:34:36,004 INFO L130 PetriNetUnfolder]: For 366383/366409 co-relation queries the response was YES. [2022-07-19 21:34:36,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94663 conditions, 11248 events. 4231/11248 cut-off events. For 366383/366409 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 117497 event pairs, 131 based on Foata normal form. 27/11158 useless extension candidates. Maximal degree in co-relation 94392. Up to 1392 conditions per place. [2022-07-19 21:34:36,325 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 854 selfloop transitions, 1765 changer transitions 26/2699 dead transitions. [2022-07-19 21:34:36,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 2699 transitions, 61925 flow [2022-07-19 21:34:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 21:34:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-19 21:34:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4370 transitions. [2022-07-19 21:34:36,330 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7727674624226348 [2022-07-19 21:34:36,330 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4370 transitions. [2022-07-19 21:34:36,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4370 transitions. [2022-07-19 21:34:36,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:36,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4370 transitions. [2022-07-19 21:34:36,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 67.23076923076923) internal successors, (4370), 65 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:36,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:36,342 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:36,342 INFO L186 Difference]: Start difference. First operand has 666 places, 2387 transitions, 50391 flow. Second operand 65 states and 4370 transitions. [2022-07-19 21:34:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 2699 transitions, 61925 flow [2022-07-19 21:34:40,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 2699 transitions, 61349 flow, removed 155 selfloop flow, removed 18 redundant places. [2022-07-19 21:34:40,588 INFO L242 Difference]: Finished difference. Result has 724 places, 2545 transitions, 58046 flow [2022-07-19 21:34:40,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49721, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=58046, PETRI_PLACES=724, PETRI_TRANSITIONS=2545} [2022-07-19 21:34:40,591 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 647 predicate places. [2022-07-19 21:34:40,591 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2545 transitions, 58046 flow [2022-07-19 21:34:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:40,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:34:40,592 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:34:40,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:34:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 21:34:40,808 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:34:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:34:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1906991496, now seen corresponding path program 10 times [2022-07-19 21:34:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:34:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756974828] [2022-07-19 21:34:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:34:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:34:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:34:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:40,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:34:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756974828] [2022-07-19 21:34:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756974828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:34:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734874281] [2022-07-19 21:34:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:34:40,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:34:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:34:40,937 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:34:40,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:34:40,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:34:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:34:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:34:40,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:34:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:41,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:34:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:34:41,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734874281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:34:41,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:34:41,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-19 21:34:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751721846] [2022-07-19 21:34:41,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:34:41,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:34:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:34:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:34:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:34:41,247 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:34:41,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2545 transitions, 58046 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:41,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:34:41,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:34:41,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:34:53,452 INFO L129 PetriNetUnfolder]: 5636/14703 cut-off events. [2022-07-19 21:34:53,452 INFO L130 PetriNetUnfolder]: For 615022/615058 co-relation queries the response was YES. [2022-07-19 21:34:53,851 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138398 conditions, 14703 events. 5636/14703 cut-off events. For 615022/615058 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 159622 event pairs, 579 based on Foata normal form. 52/14586 useless extension candidates. Maximal degree in co-relation 138123. Up to 2145 conditions per place. [2022-07-19 21:34:53,940 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1011 selfloop transitions, 2492 changer transitions 2/3559 dead transitions. [2022-07-19 21:34:53,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 3559 transitions, 88295 flow [2022-07-19 21:34:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-19 21:34:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-19 21:34:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4991 transitions. [2022-07-19 21:34:53,944 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752407579993786 [2022-07-19 21:34:53,944 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4991 transitions. [2022-07-19 21:34:53,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4991 transitions. [2022-07-19 21:34:53,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:34:53,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4991 transitions. [2022-07-19 21:34:53,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.44594594594595) internal successors, (4991), 74 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:53,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:53,955 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:34:53,955 INFO L186 Difference]: Start difference. First operand has 724 places, 2545 transitions, 58046 flow. Second operand 74 states and 4991 transitions. [2022-07-19 21:34:53,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 3559 transitions, 88295 flow [2022-07-19 21:35:02,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 3559 transitions, 86706 flow, removed 413 selfloop flow, removed 25 redundant places. [2022-07-19 21:35:02,294 INFO L242 Difference]: Finished difference. Result has 793 places, 3328 transitions, 84740 flow [2022-07-19 21:35:02,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=57036, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=84740, PETRI_PLACES=793, PETRI_TRANSITIONS=3328} [2022-07-19 21:35:02,297 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 716 predicate places. [2022-07-19 21:35:02,298 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 3328 transitions, 84740 flow [2022-07-19 21:35:02,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:02,298 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:02,298 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:35:02,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:02,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:35:02,515 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1650327980, now seen corresponding path program 11 times [2022-07-19 21:35:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971832639] [2022-07-19 21:35:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:02,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971832639] [2022-07-19 21:35:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971832639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850369738] [2022-07-19 21:35:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:35:02,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:02,655 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:02,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:35:02,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:35:02,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:02,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:35:02,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:02,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850369738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:02,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:02,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:35:02,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701567396] [2022-07-19 21:35:02,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:35:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:35:02,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:35:02,906 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:35:02,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3328 transitions, 84740 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:02,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:02,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:35:02,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:35:21,127 INFO L129 PetriNetUnfolder]: 6268/16422 cut-off events. [2022-07-19 21:35:21,127 INFO L130 PetriNetUnfolder]: For 868432/868481 co-relation queries the response was YES. [2022-07-19 21:35:21,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167517 conditions, 16422 events. 6268/16422 cut-off events. For 868432/868481 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 180918 event pairs, 421 based on Foata normal form. 48/16267 useless extension candidates. Maximal degree in co-relation 167157. Up to 2169 conditions per place. [2022-07-19 21:35:21,606 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 711 selfloop transitions, 3100 changer transitions 4/3869 dead transitions. [2022-07-19 21:35:21,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 3869 transitions, 105785 flow [2022-07-19 21:35:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-19 21:35:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-19 21:35:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5585 transitions. [2022-07-19 21:35:21,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7734385819138624 [2022-07-19 21:35:21,610 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5585 transitions. [2022-07-19 21:35:21,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5585 transitions. [2022-07-19 21:35:21,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:35:21,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5585 transitions. [2022-07-19 21:35:21,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.28915662650603) internal successors, (5585), 83 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:21,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:21,623 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:21,623 INFO L186 Difference]: Start difference. First operand has 793 places, 3328 transitions, 84740 flow. Second operand 83 states and 5585 transitions. [2022-07-19 21:35:21,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 3869 transitions, 105785 flow [2022-07-19 21:35:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 3869 transitions, 104582 flow, removed 426 selfloop flow, removed 19 redundant places. [2022-07-19 21:35:34,330 INFO L242 Difference]: Finished difference. Result has 877 places, 3634 transitions, 102351 flow [2022-07-19 21:35:34,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83816, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=102351, PETRI_PLACES=877, PETRI_TRANSITIONS=3634} [2022-07-19 21:35:34,333 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 800 predicate places. [2022-07-19 21:35:34,333 INFO L495 AbstractCegarLoop]: Abstraction has has 877 places, 3634 transitions, 102351 flow [2022-07-19 21:35:34,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:34,333 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:35:34,333 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:35:34,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:35:34,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:35:34,550 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:35:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:35:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash 917077054, now seen corresponding path program 12 times [2022-07-19 21:35:34,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:35:34,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975379238] [2022-07-19 21:35:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:35:34,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:35:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:35:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:34,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:35:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975379238] [2022-07-19 21:35:34,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975379238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:35:34,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731213658] [2022-07-19 21:35:34,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:35:34,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:35:34,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:35:34,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:35:34,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:35:34,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:35:34,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:35:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:35:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:35:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:34,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:35:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:35:34,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731213658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:35:34,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:35:34,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 21:35:34,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071273842] [2022-07-19 21:35:34,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:35:34,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:35:34,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:35:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:35:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:35:34,906 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:35:34,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 3634 transitions, 102351 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:35:34,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:35:34,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:35:34,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:02,511 INFO L129 PetriNetUnfolder]: 8477/22116 cut-off events. [2022-07-19 21:36:02,511 INFO L130 PetriNetUnfolder]: For 1434075/1434159 co-relation queries the response was YES. [2022-07-19 21:36:03,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244450 conditions, 22116 events. 8477/22116 cut-off events. For 1434075/1434159 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 255398 event pairs, 549 based on Foata normal form. 59/21942 useless extension candidates. Maximal degree in co-relation 243965. Up to 3110 conditions per place. [2022-07-19 21:36:03,187 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 756 selfloop transitions, 4596 changer transitions 3/5409 dead transitions. [2022-07-19 21:36:03,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5409 transitions, 163256 flow [2022-07-19 21:36:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-07-19 21:36:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-07-19 21:36:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8664 transitions. [2022-07-19 21:36:03,192 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7660477453580902 [2022-07-19 21:36:03,193 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8664 transitions. [2022-07-19 21:36:03,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8664 transitions. [2022-07-19 21:36:03,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:03,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8664 transitions. [2022-07-19 21:36:03,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.64615384615385) internal successors, (8664), 130 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:03,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:03,206 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:03,206 INFO L186 Difference]: Start difference. First operand has 877 places, 3634 transitions, 102351 flow. Second operand 130 states and 8664 transitions. [2022-07-19 21:36:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5409 transitions, 163256 flow [2022-07-19 21:36:30,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 5409 transitions, 159081 flow, removed 534 selfloop flow, removed 31 redundant places. [2022-07-19 21:36:30,707 INFO L242 Difference]: Finished difference. Result has 1015 places, 5163 transitions, 157846 flow [2022-07-19 21:36:30,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=99384, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=157846, PETRI_PLACES=1015, PETRI_TRANSITIONS=5163} [2022-07-19 21:36:30,710 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 938 predicate places. [2022-07-19 21:36:30,710 INFO L495 AbstractCegarLoop]: Abstraction has has 1015 places, 5163 transitions, 157846 flow [2022-07-19 21:36:30,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:30,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:30,711 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:30,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 21:36:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:30,928 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:36:30,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash 641559098, now seen corresponding path program 13 times [2022-07-19 21:36:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:30,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253879443] [2022-07-19 21:36:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:31,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253879443] [2022-07-19 21:36:31,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253879443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:31,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956975712] [2022-07-19 21:36:31,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:36:31,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:31,020 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:31,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 21:36:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:31,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 21:36:31,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:31,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:36:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:31,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956975712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:36:31,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:36:31,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 21:36:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072002111] [2022-07-19 21:36:31,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:36:31,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:36:31,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:36:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:36:31,237 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-19 21:36:31,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1015 places, 5163 transitions, 157846 flow. Second operand has 18 states, 18 states have (on average 65.44444444444444) internal successors, (1178), 18 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:31,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:31,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-19 21:36:31,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand