./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-2.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 c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:27:20,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:27:20,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:27:20,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:27:20,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:27:20,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:27:20,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:27:20,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:27:20,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:27:20,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:27:20,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:27:20,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:27:20,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:27:20,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:27:20,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:27:20,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:27:20,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:27:20,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:27:20,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:27:20,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:27:20,751 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:27:20,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:27:20,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:27:20,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:27:20,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:27:20,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:27:20,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:27:20,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:27:20,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:27:20,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:27:20,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:27:20,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:27:20,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:27:20,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:27:20,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:27:20,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:27:20,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:27:20,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:27:20,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:27:20,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:27:20,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:27:20,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:27:20,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:27:20,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:27:20,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:27:20,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:27:20,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:27:20,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:27:20,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:27:20,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:27:20,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:27:20,802 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:27:20,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:27:20,803 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:27:20,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:27:20,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:27:20,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:27:20,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:27:20,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:27:20,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:27:20,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:27:20,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:27:20,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:27:20,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:27:20,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:27:20,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:27:20,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:27:20,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:27:20,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:27:20,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:27:20,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:27:20,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:27:20,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:27:20,808 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:27:20,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:27:20,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:27:20,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2022-07-12 10:27:21,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:27:21,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:27:21,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:27:21,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:27:21,107 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:27:21,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-12 10:27:21,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b749ccbb9/0dcd370baebe4874ac7aca284d484c43/FLAGd0a3e2c36 [2022-07-12 10:27:21,595 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:27:21,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-12 10:27:21,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b749ccbb9/0dcd370baebe4874ac7aca284d484c43/FLAGd0a3e2c36 [2022-07-12 10:27:21,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b749ccbb9/0dcd370baebe4874ac7aca284d484c43 [2022-07-12 10:27:21,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:27:21,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:27:21,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:27:21,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:27:21,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:27:21,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5430b1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21, skipping insertion in model container [2022-07-12 10:27:21,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:27:21,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:27:21,797 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/parallel-misc-2.wvr.c[2554,2567] [2022-07-12 10:27:21,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:27:21,805 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:27:21,824 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/parallel-misc-2.wvr.c[2554,2567] [2022-07-12 10:27:21,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:27:21,835 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:27:21,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21 WrapperNode [2022-07-12 10:27:21,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:27:21,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:27:21,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:27:21,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:27:21,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,873 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-07-12 10:27:21,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:27:21,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:27:21,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:27:21,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:27:21,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:27:21,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:27:21,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:27:21,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:27:21,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (1/1) ... [2022-07-12 10:27:21,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:27:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:21,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:27:21,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:27:21,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:27:21,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:27:21,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:27:21,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:27:21,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:27:21,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:27:21,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:27:21,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:27:21,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:27:21,951 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:27:22,011 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:27:22,013 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:27:22,233 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:27:22,250 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:27:22,250 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:27:22,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:27:22 BoogieIcfgContainer [2022-07-12 10:27:22,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:27:22,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:27:22,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:27:22,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:27:22,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:27:21" (1/3) ... [2022-07-12 10:27:22,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2720e545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:27:22, skipping insertion in model container [2022-07-12 10:27:22,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:27:21" (2/3) ... [2022-07-12 10:27:22,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2720e545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:27:22, skipping insertion in model container [2022-07-12 10:27:22,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:27:22" (3/3) ... [2022-07-12 10:27:22,274 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2022-07-12 10:27:22,278 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:27:22,286 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:27:22,286 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:27:22,286 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:27:22,329 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:27:22,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2022-07-12 10:27:22,410 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2022-07-12 10:27:22,412 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:27:22,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-07-12 10:27:22,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2022-07-12 10:27:22,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2022-07-12 10:27:22,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:27:22,435 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@29978044, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@252adf34 [2022-07-12 10:27:22,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:27:22,457 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2022-07-12 10:27:22,457 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:27:22,457 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:22,458 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] [2022-07-12 10:27:22,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -669652547, now seen corresponding path program 1 times [2022-07-12 10:27:22,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159896613] [2022-07-12 10:27:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:22,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:22,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:22,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159896613] [2022-07-12 10:27:22,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159896613] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:22,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:22,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:27:22,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866774951] [2022-07-12 10:27:22,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:22,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:27:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:27:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:27:22,748 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 104 [2022-07-12 10:27:22,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:22,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:22,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 104 [2022-07-12 10:27:22,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:22,818 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2022-07-12 10:27:22,818 INFO L130 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-07-12 10:27:22,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 96 events. 7/96 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 1 based on Foata normal form. 7/96 useless extension candidates. Maximal degree in co-relation 65. Up to 10 conditions per place. [2022-07-12 10:27:22,820 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 6 selfloop transitions, 0 changer transitions 2/89 dead transitions. [2022-07-12 10:27:22,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 202 flow [2022-07-12 10:27:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:27:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:27:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2022-07-12 10:27:22,844 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9423076923076923 [2022-07-12 10:27:22,845 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2022-07-12 10:27:22,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2022-07-12 10:27:22,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:22,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2022-07-12 10:27:22,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:22,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:22,866 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:22,868 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 2 states and 196 transitions. [2022-07-12 10:27:22,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 202 flow [2022-07-12 10:27:22,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:27:22,878 INFO L242 Difference]: Finished difference. Result has 89 places, 87 transitions, 178 flow [2022-07-12 10:27:22,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2022-07-12 10:27:22,883 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2022-07-12 10:27:22,883 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 178 flow [2022-07-12 10:27:22,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:22,884 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:22,885 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] [2022-07-12 10:27:22,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:27:22,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:22,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1666724900, now seen corresponding path program 1 times [2022-07-12 10:27:22,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:22,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757208965] [2022-07-12 10:27:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:23,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757208965] [2022-07-12 10:27:23,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757208965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:23,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:23,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:27:23,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877034851] [2022-07-12 10:27:23,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:23,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:27:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:23,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:27:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:27:23,210 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:23,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:23,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:23,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:23,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:23,367 INFO L129 PetriNetUnfolder]: 21/139 cut-off events. [2022-07-12 10:27:23,367 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-07-12 10:27:23,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 139 events. 21/139 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 184. Up to 31 conditions per place. [2022-07-12 10:27:23,371 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 15 selfloop transitions, 9 changer transitions 4/97 dead transitions. [2022-07-12 10:27:23,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 257 flow [2022-07-12 10:27:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:27:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:27:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 582 transitions. [2022-07-12 10:27:23,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994505494505495 [2022-07-12 10:27:23,379 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 582 transitions. [2022-07-12 10:27:23,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 582 transitions. [2022-07-12 10:27:23,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:23,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 582 transitions. [2022-07-12 10:27:23,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.14285714285714) internal successors, (582), 7 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:23,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:23,387 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:23,387 INFO L186 Difference]: Start difference. First operand has 89 places, 87 transitions, 178 flow. Second operand 7 states and 582 transitions. [2022-07-12 10:27:23,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 257 flow [2022-07-12 10:27:23,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:27:23,392 INFO L242 Difference]: Finished difference. Result has 96 places, 91 transitions, 225 flow [2022-07-12 10:27:23,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2022-07-12 10:27:23,393 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 4 predicate places. [2022-07-12 10:27:23,393 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 225 flow [2022-07-12 10:27:23,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:23,394 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:23,394 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:23,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:27:23,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 319045297, now seen corresponding path program 1 times [2022-07-12 10:27:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:23,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19624692] [2022-07-12 10:27:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:23,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19624692] [2022-07-12 10:27:23,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19624692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659100123] [2022-07-12 10:27:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:23,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:23,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:27:23,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:27:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 10:27:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:24,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:24,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659100123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:24,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:24,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-12 10:27:24,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331600006] [2022-07-12 10:27:24,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:24,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 10:27:24,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 10:27:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-12 10:27:24,597 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-12 10:27:24,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 225 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:24,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:24,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-12 10:27:24,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:24,973 INFO L129 PetriNetUnfolder]: 116/418 cut-off events. [2022-07-12 10:27:24,974 INFO L130 PetriNetUnfolder]: For 55/62 co-relation queries the response was YES. [2022-07-12 10:27:24,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 418 events. 116/418 cut-off events. For 55/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 7 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 732. Up to 66 conditions per place. [2022-07-12 10:27:24,978 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 57 selfloop transitions, 14 changer transitions 1/133 dead transitions. [2022-07-12 10:27:24,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 480 flow [2022-07-12 10:27:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:27:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:27:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2022-07-12 10:27:24,981 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2022-07-12 10:27:24,981 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2022-07-12 10:27:24,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2022-07-12 10:27:24,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:24,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2022-07-12 10:27:24,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:24,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:24,988 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:24,988 INFO L186 Difference]: Start difference. First operand has 96 places, 91 transitions, 225 flow. Second operand 10 states and 763 transitions. [2022-07-12 10:27:24,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 480 flow [2022-07-12 10:27:24,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 461 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-12 10:27:24,996 INFO L242 Difference]: Finished difference. Result has 103 places, 99 transitions, 290 flow [2022-07-12 10:27:24,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2022-07-12 10:27:24,999 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2022-07-12 10:27:24,999 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 290 flow [2022-07-12 10:27:25,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,000 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:25,001 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:25,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:25,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:25,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash -217293375, now seen corresponding path program 2 times [2022-07-12 10:27:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662810339] [2022-07-12 10:27:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:25,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:25,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662810339] [2022-07-12 10:27:25,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662810339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:25,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:25,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:27:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693840152] [2022-07-12 10:27:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:27:25,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:27:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:27:25,374 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-12 10:27:25,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:25,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-12 10:27:25,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:25,561 INFO L129 PetriNetUnfolder]: 116/398 cut-off events. [2022-07-12 10:27:25,561 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-12 10:27:25,563 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 398 events. 116/398 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1893 event pairs, 14 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 848. Up to 97 conditions per place. [2022-07-12 10:27:25,567 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 43 selfloop transitions, 16 changer transitions 4/124 dead transitions. [2022-07-12 10:27:25,567 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 124 transitions, 529 flow [2022-07-12 10:27:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:27:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:27:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2022-07-12 10:27:25,569 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2022-07-12 10:27:25,574 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2022-07-12 10:27:25,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2022-07-12 10:27:25,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:25,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2022-07-12 10:27:25,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 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) [2022-07-12 10:27:25,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,579 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,579 INFO L186 Difference]: Start difference. First operand has 103 places, 99 transitions, 290 flow. Second operand 7 states and 536 transitions. [2022-07-12 10:27:25,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 124 transitions, 529 flow [2022-07-12 10:27:25,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 124 transitions, 523 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:27:25,586 INFO L242 Difference]: Finished difference. Result has 109 places, 105 transitions, 385 flow [2022-07-12 10:27:25,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2022-07-12 10:27:25,587 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 17 predicate places. [2022-07-12 10:27:25,588 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 385 flow [2022-07-12 10:27:25,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,588 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:25,588 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:27:25,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1113196752, now seen corresponding path program 1 times [2022-07-12 10:27:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:25,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975898457] [2022-07-12 10:27:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:25,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:25,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:25,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975898457] [2022-07-12 10:27:25,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975898457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:25,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:25,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:27:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788995837] [2022-07-12 10:27:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:25,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:27:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:25,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:27:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:27:25,715 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-12 10:27:25,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:25,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-12 10:27:25,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:25,893 INFO L129 PetriNetUnfolder]: 111/390 cut-off events. [2022-07-12 10:27:25,893 INFO L130 PetriNetUnfolder]: For 450/457 co-relation queries the response was YES. [2022-07-12 10:27:25,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 390 events. 111/390 cut-off events. For 450/457 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1815 event pairs, 14 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 910. Up to 126 conditions per place. [2022-07-12 10:27:25,897 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 48 selfloop transitions, 12 changer transitions 5/126 dead transitions. [2022-07-12 10:27:25,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 593 flow [2022-07-12 10:27:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:27:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:27:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 537 transitions. [2022-07-12 10:27:25,900 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7376373626373627 [2022-07-12 10:27:25,900 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 537 transitions. [2022-07-12 10:27:25,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 537 transitions. [2022-07-12 10:27:25,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:25,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 537 transitions. [2022-07-12 10:27:25,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,904 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,904 INFO L186 Difference]: Start difference. First operand has 109 places, 105 transitions, 385 flow. Second operand 7 states and 537 transitions. [2022-07-12 10:27:25,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 593 flow [2022-07-12 10:27:25,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 585 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-12 10:27:25,913 INFO L242 Difference]: Finished difference. Result has 115 places, 105 transitions, 404 flow [2022-07-12 10:27:25,913 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2022-07-12 10:27:25,915 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2022-07-12 10:27:25,916 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 404 flow [2022-07-12 10:27:25,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:25,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:25,916 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:25,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:27:25,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash 704217598, now seen corresponding path program 2 times [2022-07-12 10:27:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:25,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714658398] [2022-07-12 10:27:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:26,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:26,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714658398] [2022-07-12 10:27:26,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714658398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:26,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:26,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:27:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143278757] [2022-07-12 10:27:26,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:26,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:27:26,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:26,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:27:26,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:27:26,039 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-12 10:27:26,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 105 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:26,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:26,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-12 10:27:26,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:26,177 INFO L129 PetriNetUnfolder]: 106/371 cut-off events. [2022-07-12 10:27:26,178 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-12 10:27:26,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 371 events. 106/371 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1567 event pairs, 17 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 907. Up to 75 conditions per place. [2022-07-12 10:27:26,182 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 47 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2022-07-12 10:27:26,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 638 flow [2022-07-12 10:27:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:27:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:27:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 531 transitions. [2022-07-12 10:27:26,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293956043956044 [2022-07-12 10:27:26,184 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 531 transitions. [2022-07-12 10:27:26,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 531 transitions. [2022-07-12 10:27:26,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:26,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 531 transitions. [2022-07-12 10:27:26,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:26,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:26,188 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:26,188 INFO L186 Difference]: Start difference. First operand has 115 places, 105 transitions, 404 flow. Second operand 7 states and 531 transitions. [2022-07-12 10:27:26,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 638 flow [2022-07-12 10:27:26,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 610 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-07-12 10:27:26,193 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 482 flow [2022-07-12 10:27:26,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=482, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2022-07-12 10:27:26,194 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2022-07-12 10:27:26,194 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 482 flow [2022-07-12 10:27:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:26,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:26,195 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:26,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:27:26,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash -147861111, now seen corresponding path program 1 times [2022-07-12 10:27:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:26,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246878519] [2022-07-12 10:27:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:26,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246878519] [2022-07-12 10:27:26,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246878519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097307086] [2022-07-12 10:27:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:26,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:26,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:27:26,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:27:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:27:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:26,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:27,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097307086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:27,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:27,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-07-12 10:27:27,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589921175] [2022-07-12 10:27:27,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:27,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:27:27,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:27:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:27:27,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-07-12 10:27:27,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 482 flow. Second operand has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:27,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:27,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-07-12 10:27:27,334 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:30,021 INFO L129 PetriNetUnfolder]: 347/929 cut-off events. [2022-07-12 10:27:30,021 INFO L130 PetriNetUnfolder]: For 2692/2692 co-relation queries the response was YES. [2022-07-12 10:27:30,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 929 events. 347/929 cut-off events. For 2692/2692 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5041 event pairs, 10 based on Foata normal form. 44/909 useless extension candidates. Maximal degree in co-relation 2682. Up to 178 conditions per place. [2022-07-12 10:27:30,031 INFO L132 encePairwiseOnDemand]: 88/104 looper letters, 178 selfloop transitions, 87 changer transitions 0/324 dead transitions. [2022-07-12 10:27:30,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 2285 flow [2022-07-12 10:27:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-12 10:27:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-12 10:27:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3067 transitions. [2022-07-12 10:27:30,040 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7021520146520146 [2022-07-12 10:27:30,040 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3067 transitions. [2022-07-12 10:27:30,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3067 transitions. [2022-07-12 10:27:30,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:30,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3067 transitions. [2022-07-12 10:27:30,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 73.02380952380952) internal successors, (3067), 42 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,058 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,058 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 482 flow. Second operand 42 states and 3067 transitions. [2022-07-12 10:27:30,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 2285 flow [2022-07-12 10:27:30,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 324 transitions, 2220 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-07-12 10:27:30,071 INFO L242 Difference]: Finished difference. Result has 189 places, 195 transitions, 1417 flow [2022-07-12 10:27:30,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1417, PETRI_PLACES=189, PETRI_TRANSITIONS=195} [2022-07-12 10:27:30,072 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2022-07-12 10:27:30,072 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 195 transitions, 1417 flow [2022-07-12 10:27:30,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,073 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:30,074 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:30,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:27:30,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 10:27:30,302 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391862, now seen corresponding path program 2 times [2022-07-12 10:27:30,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:30,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287676305] [2022-07-12 10:27:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:30,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:30,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:30,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287676305] [2022-07-12 10:27:30,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287676305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:30,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:30,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:27:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205921880] [2022-07-12 10:27:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:30,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:27:30,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:27:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:27:30,373 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-12 10:27:30,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 195 transitions, 1417 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:30,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-12 10:27:30,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:30,672 INFO L129 PetriNetUnfolder]: 434/1682 cut-off events. [2022-07-12 10:27:30,672 INFO L130 PetriNetUnfolder]: For 12826/12903 co-relation queries the response was YES. [2022-07-12 10:27:30,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6581 conditions, 1682 events. 434/1682 cut-off events. For 12826/12903 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13422 event pairs, 108 based on Foata normal form. 23/1564 useless extension candidates. Maximal degree in co-relation 6531. Up to 232 conditions per place. [2022-07-12 10:27:30,695 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 28 selfloop transitions, 5 changer transitions 0/212 dead transitions. [2022-07-12 10:27:30,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 212 transitions, 1563 flow [2022-07-12 10:27:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:27:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:27:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2022-07-12 10:27:30,698 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2022-07-12 10:27:30,698 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2022-07-12 10:27:30,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2022-07-12 10:27:30,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:30,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2022-07-12 10:27:30,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,701 INFO L186 Difference]: Start difference. First operand has 189 places, 195 transitions, 1417 flow. Second operand 4 states and 376 transitions. [2022-07-12 10:27:30,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 212 transitions, 1563 flow [2022-07-12 10:27:30,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 212 transitions, 1476 flow, removed 36 selfloop flow, removed 5 redundant places. [2022-07-12 10:27:30,747 INFO L242 Difference]: Finished difference. Result has 190 places, 198 transitions, 1364 flow [2022-07-12 10:27:30,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1364, PETRI_PLACES=190, PETRI_TRANSITIONS=198} [2022-07-12 10:27:30,748 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 98 predicate places. [2022-07-12 10:27:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 198 transitions, 1364 flow [2022-07-12 10:27:30,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:30,749 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:30,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:27:30,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1384763482, now seen corresponding path program 1 times [2022-07-12 10:27:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033090271] [2022-07-12 10:27:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 10:27:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033090271] [2022-07-12 10:27:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033090271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:30,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928244193] [2022-07-12 10:27:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:30,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:30,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:30,928 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) [2022-07-12 10:27:30,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:27:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:27:31,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 10:27:31,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 10:27:31,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928244193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:31,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:31,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-12 10:27:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342704364] [2022-07-12 10:27:31,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:27:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:27:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:27:31,745 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-07-12 10:27:31,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 198 transitions, 1364 flow. Second operand has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:31,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:31,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-07-12 10:27:31,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:32,520 INFO L129 PetriNetUnfolder]: 828/2406 cut-off events. [2022-07-12 10:27:32,520 INFO L130 PetriNetUnfolder]: For 18550/18603 co-relation queries the response was YES. [2022-07-12 10:27:32,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2406 events. 828/2406 cut-off events. For 18550/18603 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18926 event pairs, 65 based on Foata normal form. 15/2264 useless extension candidates. Maximal degree in co-relation 10270. Up to 449 conditions per place. [2022-07-12 10:27:32,553 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 115 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2022-07-12 10:27:32,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2222 flow [2022-07-12 10:27:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:27:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:27:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 973 transitions. [2022-07-12 10:27:32,556 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7196745562130178 [2022-07-12 10:27:32,556 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 973 transitions. [2022-07-12 10:27:32,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 973 transitions. [2022-07-12 10:27:32,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:32,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 973 transitions. [2022-07-12 10:27:32,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.84615384615384) internal successors, (973), 13 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:32,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:32,564 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:32,564 INFO L186 Difference]: Start difference. First operand has 190 places, 198 transitions, 1364 flow. Second operand 13 states and 973 transitions. [2022-07-12 10:27:32,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2222 flow [2022-07-12 10:27:32,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 249 transitions, 2222 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:27:32,664 INFO L242 Difference]: Finished difference. Result has 206 places, 206 transitions, 1660 flow [2022-07-12 10:27:32,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1660, PETRI_PLACES=206, PETRI_TRANSITIONS=206} [2022-07-12 10:27:32,666 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 114 predicate places. [2022-07-12 10:27:32,666 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 206 transitions, 1660 flow [2022-07-12 10:27:32,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:32,666 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:32,667 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:32,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:32,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:32,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash -932018700, now seen corresponding path program 1 times [2022-07-12 10:27:32,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:32,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861330119] [2022-07-12 10:27:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 10:27:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861330119] [2022-07-12 10:27:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861330119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:32,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:32,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:27:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837130310] [2022-07-12 10:27:32,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:27:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:27:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:27:32,957 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-12 10:27:32,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 206 transitions, 1660 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:32,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:32,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-12 10:27:32,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:33,256 INFO L129 PetriNetUnfolder]: 375/1488 cut-off events. [2022-07-12 10:27:33,256 INFO L130 PetriNetUnfolder]: For 11290/11369 co-relation queries the response was YES. [2022-07-12 10:27:33,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5982 conditions, 1488 events. 375/1488 cut-off events. For 11290/11369 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11125 event pairs, 90 based on Foata normal form. 31/1394 useless extension candidates. Maximal degree in co-relation 5925. Up to 235 conditions per place. [2022-07-12 10:27:33,279 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 24 selfloop transitions, 6 changer transitions 0/217 dead transitions. [2022-07-12 10:27:33,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 217 transitions, 1777 flow [2022-07-12 10:27:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:27:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:27:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2022-07-12 10:27:33,281 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8966346153846154 [2022-07-12 10:27:33,281 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2022-07-12 10:27:33,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2022-07-12 10:27:33,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:33,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2022-07-12 10:27:33,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:33,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:33,284 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:33,284 INFO L186 Difference]: Start difference. First operand has 206 places, 206 transitions, 1660 flow. Second operand 4 states and 373 transitions. [2022-07-12 10:27:33,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 217 transitions, 1777 flow [2022-07-12 10:27:33,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 217 transitions, 1742 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-07-12 10:27:33,330 INFO L242 Difference]: Finished difference. Result has 204 places, 208 transitions, 1659 flow [2022-07-12 10:27:33,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1659, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-07-12 10:27:33,331 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2022-07-12 10:27:33,331 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 1659 flow [2022-07-12 10:27:33,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:33,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:33,332 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:27:33,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:33,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:33,333 INFO L85 PathProgramCache]: Analyzing trace with hash 591378688, now seen corresponding path program 2 times [2022-07-12 10:27:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846826841] [2022-07-12 10:27:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:27:33,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846826841] [2022-07-12 10:27:33,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846826841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:33,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:33,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:27:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805435752] [2022-07-12 10:27:33,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:33,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:27:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:27:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:27:33,440 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-12 10:27:33,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 1659 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:33,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:33,441 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-12 10:27:33,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:34,204 INFO L129 PetriNetUnfolder]: 1011/3594 cut-off events. [2022-07-12 10:27:34,204 INFO L130 PetriNetUnfolder]: For 29453/29537 co-relation queries the response was YES. [2022-07-12 10:27:34,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15601 conditions, 3594 events. 1011/3594 cut-off events. For 29453/29537 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34512 event pairs, 266 based on Foata normal form. 26/3394 useless extension candidates. Maximal degree in co-relation 15542. Up to 506 conditions per place. [2022-07-12 10:27:34,260 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 29 selfloop transitions, 5 changer transitions 0/226 dead transitions. [2022-07-12 10:27:34,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 226 transitions, 1809 flow [2022-07-12 10:27:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:27:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:27:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2022-07-12 10:27:34,263 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-07-12 10:27:34,263 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2022-07-12 10:27:34,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2022-07-12 10:27:34,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:34,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2022-07-12 10:27:34,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:34,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:34,279 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:34,279 INFO L186 Difference]: Start difference. First operand has 204 places, 208 transitions, 1659 flow. Second operand 4 states and 377 transitions. [2022-07-12 10:27:34,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 226 transitions, 1809 flow [2022-07-12 10:27:34,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 226 transitions, 1809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:27:34,445 INFO L242 Difference]: Finished difference. Result has 210 places, 211 transitions, 1693 flow [2022-07-12 10:27:34,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1693, PETRI_PLACES=210, PETRI_TRANSITIONS=211} [2022-07-12 10:27:34,446 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2022-07-12 10:27:34,447 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 211 transitions, 1693 flow [2022-07-12 10:27:34,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:34,447 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:34,447 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:34,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:27:34,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash 291710930, now seen corresponding path program 1 times [2022-07-12 10:27:34,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:34,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924810267] [2022-07-12 10:27:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:34,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924810267] [2022-07-12 10:27:34,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924810267] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681147206] [2022-07-12 10:27:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:34,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:34,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:34,600 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) [2022-07-12 10:27:34,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:27:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:27:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:34,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681147206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:34,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:34,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-12 10:27:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286389962] [2022-07-12 10:27:34,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:34,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:27:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:27:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:27:34,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:34,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 211 transitions, 1693 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:34,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:34,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:34,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:35,862 INFO L129 PetriNetUnfolder]: 1003/3973 cut-off events. [2022-07-12 10:27:35,862 INFO L130 PetriNetUnfolder]: For 35812/36067 co-relation queries the response was YES. [2022-07-12 10:27:35,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18085 conditions, 3973 events. 1003/3973 cut-off events. For 35812/36067 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 39168 event pairs, 295 based on Foata normal form. 62/3861 useless extension candidates. Maximal degree in co-relation 18023. Up to 611 conditions per place. [2022-07-12 10:27:35,923 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 36 selfloop transitions, 20 changer transitions 4/246 dead transitions. [2022-07-12 10:27:35,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 246 transitions, 1951 flow [2022-07-12 10:27:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:27:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:27:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2022-07-12 10:27:35,926 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2022-07-12 10:27:35,926 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2022-07-12 10:27:35,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2022-07-12 10:27:35,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:35,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2022-07-12 10:27:35,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:35,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:35,930 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:35,930 INFO L186 Difference]: Start difference. First operand has 210 places, 211 transitions, 1693 flow. Second operand 10 states and 844 transitions. [2022-07-12 10:27:35,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 246 transitions, 1951 flow [2022-07-12 10:27:36,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 246 transitions, 1951 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:27:36,026 INFO L242 Difference]: Finished difference. Result has 222 places, 222 transitions, 1799 flow [2022-07-12 10:27:36,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1799, PETRI_PLACES=222, PETRI_TRANSITIONS=222} [2022-07-12 10:27:36,027 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 130 predicate places. [2022-07-12 10:27:36,027 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 222 transitions, 1799 flow [2022-07-12 10:27:36,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:36,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:36,028 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:36,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:36,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash -398723812, now seen corresponding path program 2 times [2022-07-12 10:27:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:36,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741171351] [2022-07-12 10:27:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:36,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741171351] [2022-07-12 10:27:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741171351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214458490] [2022-07-12 10:27:36,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:27:36,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:36,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:36,368 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) [2022-07-12 10:27:36,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:27:36,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:27:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:27:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:27:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:36,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:36,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214458490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:36,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:36,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-12 10:27:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434932064] [2022-07-12 10:27:36,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:27:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:27:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:27:36,710 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:36,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 222 transitions, 1799 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:36,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:36,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:36,711 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:37,915 INFO L129 PetriNetUnfolder]: 1603/6338 cut-off events. [2022-07-12 10:27:37,915 INFO L130 PetriNetUnfolder]: For 61811/62357 co-relation queries the response was YES. [2022-07-12 10:27:37,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30128 conditions, 6338 events. 1603/6338 cut-off events. For 61811/62357 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 67958 event pairs, 372 based on Foata normal form. 113/6203 useless extension candidates. Maximal degree in co-relation 30062. Up to 785 conditions per place. [2022-07-12 10:27:38,030 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 35 changer transitions 4/272 dead transitions. [2022-07-12 10:27:38,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 272 transitions, 2228 flow [2022-07-12 10:27:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:27:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:27:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 934 transitions. [2022-07-12 10:27:38,034 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164335664335665 [2022-07-12 10:27:38,034 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 934 transitions. [2022-07-12 10:27:38,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 934 transitions. [2022-07-12 10:27:38,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:38,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 934 transitions. [2022-07-12 10:27:38,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.9090909090909) internal successors, (934), 11 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:38,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:38,038 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:38,038 INFO L186 Difference]: Start difference. First operand has 222 places, 222 transitions, 1799 flow. Second operand 11 states and 934 transitions. [2022-07-12 10:27:38,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 272 transitions, 2228 flow [2022-07-12 10:27:38,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 272 transitions, 2147 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-12 10:27:38,273 INFO L242 Difference]: Finished difference. Result has 228 places, 237 transitions, 1921 flow [2022-07-12 10:27:38,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1921, PETRI_PLACES=228, PETRI_TRANSITIONS=237} [2022-07-12 10:27:38,274 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 136 predicate places. [2022-07-12 10:27:38,274 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 237 transitions, 1921 flow [2022-07-12 10:27:38,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:38,275 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:38,275 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:38,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:27:38,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:27:38,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:38,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1128249126, now seen corresponding path program 3 times [2022-07-12 10:27:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874451585] [2022-07-12 10:27:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:38,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874451585] [2022-07-12 10:27:38,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874451585] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817635724] [2022-07-12 10:27:38,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:27:38,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:38,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:38,640 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) [2022-07-12 10:27:38,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:27:38,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:27:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:27:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:27:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:38,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:39,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817635724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:39,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:39,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-12 10:27:39,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716828370] [2022-07-12 10:27:39,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:39,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:27:39,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:27:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:27:39,094 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:39,095 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 237 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:39,095 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:39,095 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:39,095 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:40,656 INFO L129 PetriNetUnfolder]: 1998/8151 cut-off events. [2022-07-12 10:27:40,656 INFO L130 PetriNetUnfolder]: For 80698/81392 co-relation queries the response was YES. [2022-07-12 10:27:40,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38650 conditions, 8151 events. 1998/8151 cut-off events. For 80698/81392 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 93127 event pairs, 520 based on Foata normal form. 126/7957 useless extension candidates. Maximal degree in co-relation 38582. Up to 1104 conditions per place. [2022-07-12 10:27:40,754 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 72 selfloop transitions, 27 changer transitions 4/289 dead transitions. [2022-07-12 10:27:40,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 289 transitions, 2414 flow [2022-07-12 10:27:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:27:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:27:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-12 10:27:40,756 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-12 10:27:40,756 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-12 10:27:40,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-12 10:27:40,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:40,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-12 10:27:40,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:40,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:40,760 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:40,760 INFO L186 Difference]: Start difference. First operand has 228 places, 237 transitions, 1921 flow. Second operand 11 states and 931 transitions. [2022-07-12 10:27:40,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 289 transitions, 2414 flow [2022-07-12 10:27:41,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 2326 flow, removed 34 selfloop flow, removed 6 redundant places. [2022-07-12 10:27:41,057 INFO L242 Difference]: Finished difference. Result has 234 places, 253 transitions, 2060 flow [2022-07-12 10:27:41,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2060, PETRI_PLACES=234, PETRI_TRANSITIONS=253} [2022-07-12 10:27:41,058 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 142 predicate places. [2022-07-12 10:27:41,058 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2060 flow [2022-07-12 10:27:41,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:41,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:41,059 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:41,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:41,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 409894142, now seen corresponding path program 1 times [2022-07-12 10:27:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152778734] [2022-07-12 10:27:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:41,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152778734] [2022-07-12 10:27:41,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152778734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:27:41,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:27:41,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:27:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345151877] [2022-07-12 10:27:41,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:27:41,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:27:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:41,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:27:41,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:27:41,337 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-12 10:27:41,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 253 transitions, 2060 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:41,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:41,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-12 10:27:41,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:42,866 INFO L129 PetriNetUnfolder]: 2124/8002 cut-off events. [2022-07-12 10:27:42,866 INFO L130 PetriNetUnfolder]: For 79350/79767 co-relation queries the response was YES. [2022-07-12 10:27:42,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38630 conditions, 8002 events. 2124/8002 cut-off events. For 79350/79767 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 89616 event pairs, 475 based on Foata normal form. 191/7895 useless extension candidates. Maximal degree in co-relation 38560. Up to 1057 conditions per place. [2022-07-12 10:27:42,960 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 80 selfloop transitions, 6 changer transitions 0/296 dead transitions. [2022-07-12 10:27:42,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 296 transitions, 2530 flow [2022-07-12 10:27:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:27:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:27:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-07-12 10:27:42,962 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2022-07-12 10:27:42,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-07-12 10:27:42,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-07-12 10:27:42,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:42,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-07-12 10:27:42,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:42,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:42,965 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:42,965 INFO L186 Difference]: Start difference. First operand has 234 places, 253 transitions, 2060 flow. Second operand 4 states and 375 transitions. [2022-07-12 10:27:42,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 296 transitions, 2530 flow [2022-07-12 10:27:43,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 296 transitions, 2493 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-12 10:27:43,223 INFO L242 Difference]: Finished difference. Result has 232 places, 253 transitions, 2059 flow [2022-07-12 10:27:43,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2059, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2022-07-12 10:27:43,224 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 140 predicate places. [2022-07-12 10:27:43,225 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 2059 flow [2022-07-12 10:27:43,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:43,225 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:43,225 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:43,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:27:43,226 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 184085024, now seen corresponding path program 4 times [2022-07-12 10:27:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623906134] [2022-07-12 10:27:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:43,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:43,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623906134] [2022-07-12 10:27:43,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623906134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419099743] [2022-07-12 10:27:43,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:27:43,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:43,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:43,355 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) [2022-07-12 10:27:43,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:27:43,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:27:43,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:27:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:27:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:43,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:43,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419099743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:43,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:43,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-12 10:27:43,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908269318] [2022-07-12 10:27:43,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:43,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:27:43,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:27:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-12 10:27:43,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:43,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 2059 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:43,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:43,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:43,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:45,087 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([253] L44-->L51: Formula: (= v_~pos~0_23 (+ v_~pos~0_24 1)) InVars {~pos~0=v_~pos~0_24} OutVars{thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_1|, ~pos~0=v_~pos~0_23} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post1, ~pos~0][125], [1259#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 640#(and (<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), Black: 631#true, 1843#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 1586#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1826#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (<= |thread2Thread1of1ForFork1_#t~post4| (* (div |thread2Thread1of1ForFork1_#t~post4| 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1270#(and (<= ~i2~0 (* (div ~i2~0 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1265#true, Black: 1501#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 6#L94-4true, 1837#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 1834#true, 3656#true, Black: 1844#(and (<= ~d2~0 (* (div ~d2~0 256) 256)) (<= 0 ~d2~0)), Black: 1841#true, Black: 3052#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 3053#(<= ~pos~0 (+ (* (div (+ (- 1) ~pos~0) 4294967296) 4294967296) 1)), Black: 3649#true, 131#(<= (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296))), Black: 1166#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1198#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1208#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1204#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1212#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 618#true, Black: 1178#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1202#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1186#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 106#true, Black: 1210#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1196#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1206#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 603#true, Black: 1168#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1162#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 592#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 126#true, Black: 652#(and (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1192#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 264#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod ~i2~0 4294967296) 0)), Black: 594#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1182#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 3048#true, Black: 1194#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 650#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1188#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1170#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1176#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1214#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1200#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 645#true, 8#L51true, Black: 1220#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 941#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1174#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 59#L70true, Black: 868#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (< (mod (+ 4294967295 ~i2~0) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 2452#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1190#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 608#(<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 1172#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 2448#true, Black: 1164#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 610#(and (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)) (<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296))))), Black: 607#(<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)), 1849#true, Black: 1257#true, Black: 1260#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), Black: 623#(<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 627#(and (<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), 3652#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 113#(= (+ (* (- 4294967296) (div ~pos~0 4294967296)) ~pos~0) 0), 636#(<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))))]) [2022-07-12 10:27:45,088 INFO L384 tUnfolder$Statistics]: this new event has 96 ancestors and is cut-off event [2022-07-12 10:27:45,088 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-12 10:27:45,088 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-12 10:27:45,088 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-12 10:27:45,177 INFO L129 PetriNetUnfolder]: 1872/7710 cut-off events. [2022-07-12 10:27:45,178 INFO L130 PetriNetUnfolder]: For 79989/80605 co-relation queries the response was YES. [2022-07-12 10:27:45,227 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37808 conditions, 7710 events. 1872/7710 cut-off events. For 79989/80605 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 87447 event pairs, 541 based on Foata normal form. 126/7500 useless extension candidates. Maximal degree in co-relation 37738. Up to 1226 conditions per place. [2022-07-12 10:27:45,251 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 76 selfloop transitions, 27 changer transitions 4/295 dead transitions. [2022-07-12 10:27:45,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 295 transitions, 2485 flow [2022-07-12 10:27:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:27:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:27:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2022-07-12 10:27:45,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2022-07-12 10:27:45,253 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2022-07-12 10:27:45,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2022-07-12 10:27:45,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:45,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2022-07-12 10:27:45,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:45,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:45,256 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:45,256 INFO L186 Difference]: Start difference. First operand has 232 places, 253 transitions, 2059 flow. Second operand 10 states and 843 transitions. [2022-07-12 10:27:45,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 295 transitions, 2485 flow [2022-07-12 10:27:45,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 2485 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:27:45,429 INFO L242 Difference]: Finished difference. Result has 246 places, 271 transitions, 2289 flow [2022-07-12 10:27:45,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=246, PETRI_TRANSITIONS=271} [2022-07-12 10:27:45,430 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 154 predicate places. [2022-07-12 10:27:45,430 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 271 transitions, 2289 flow [2022-07-12 10:27:45,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:45,431 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:45,431 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:45,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:45,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:45,637 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1699141446, now seen corresponding path program 5 times [2022-07-12 10:27:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256916964] [2022-07-12 10:27:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:45,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:45,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256916964] [2022-07-12 10:27:45,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256916964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:45,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188413616] [2022-07-12 10:27:45,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:27:45,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:45,797 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) [2022-07-12 10:27:45,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:27:45,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 10:27:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:27:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:27:45,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:46,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:46,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188413616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:46,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:46,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-12 10:27:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220702737] [2022-07-12 10:27:46,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:46,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:27:46,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:27:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:27:46,158 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:46,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 271 transitions, 2289 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:46,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:46,160 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:46,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:47,972 INFO L129 PetriNetUnfolder]: 2333/9545 cut-off events. [2022-07-12 10:27:47,972 INFO L130 PetriNetUnfolder]: For 102247/103107 co-relation queries the response was YES. [2022-07-12 10:27:48,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47581 conditions, 9545 events. 2333/9545 cut-off events. For 102247/103107 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 112166 event pairs, 613 based on Foata normal form. 245/9401 useless extension candidates. Maximal degree in co-relation 47505. Up to 1300 conditions per place. [2022-07-12 10:27:48,097 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 75 selfloop transitions, 61 changer transitions 4/328 dead transitions. [2022-07-12 10:27:48,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 328 transitions, 2918 flow [2022-07-12 10:27:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:27:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:27:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2022-07-12 10:27:48,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2022-07-12 10:27:48,100 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2022-07-12 10:27:48,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2022-07-12 10:27:48,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:48,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2022-07-12 10:27:48,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:48,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:48,103 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:48,104 INFO L186 Difference]: Start difference. First operand has 246 places, 271 transitions, 2289 flow. Second operand 11 states and 933 transitions. [2022-07-12 10:27:48,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 328 transitions, 2918 flow [2022-07-12 10:27:48,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 328 transitions, 2883 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-12 10:27:48,390 INFO L242 Difference]: Finished difference. Result has 255 places, 293 transitions, 2698 flow [2022-07-12 10:27:48,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2698, PETRI_PLACES=255, PETRI_TRANSITIONS=293} [2022-07-12 10:27:48,391 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 163 predicate places. [2022-07-12 10:27:48,391 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 293 transitions, 2698 flow [2022-07-12 10:27:48,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:48,391 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:48,392 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:48,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:27:48,607 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,SelfDestructingSolverStorable16 [2022-07-12 10:27:48,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:48,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash -110206322, now seen corresponding path program 6 times [2022-07-12 10:27:48,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:48,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650033615] [2022-07-12 10:27:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:48,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:48,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650033615] [2022-07-12 10:27:48,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650033615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500414929] [2022-07-12 10:27:48,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:27:48,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:48,852 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) [2022-07-12 10:27:48,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:27:48,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:27:48,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:27:48,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 10:27:48,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:49,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:27:49,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500414929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:49,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:49,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-12 10:27:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737685286] [2022-07-12 10:27:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:49,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 10:27:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 10:27:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 10:27:49,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-12 10:27:49,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 293 transitions, 2698 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:49,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:49,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-12 10:27:49,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:27:51,263 INFO L129 PetriNetUnfolder]: 2497/10270 cut-off events. [2022-07-12 10:27:51,263 INFO L130 PetriNetUnfolder]: For 115350/116438 co-relation queries the response was YES. [2022-07-12 10:27:51,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 10270 events. 2497/10270 cut-off events. For 115350/116438 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 122677 event pairs, 676 based on Foata normal form. 259/10117 useless extension candidates. Maximal degree in co-relation 52409. Up to 1413 conditions per place. [2022-07-12 10:27:51,527 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 112 selfloop transitions, 39 changer transitions 4/343 dead transitions. [2022-07-12 10:27:51,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 343 transitions, 3327 flow [2022-07-12 10:27:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:27:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:27:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-12 10:27:51,529 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-12 10:27:51,529 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-12 10:27:51,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-12 10:27:51,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:27:51,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-12 10:27:51,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:51,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:51,532 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:51,532 INFO L186 Difference]: Start difference. First operand has 255 places, 293 transitions, 2698 flow. Second operand 11 states and 931 transitions. [2022-07-12 10:27:51,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 343 transitions, 3327 flow [2022-07-12 10:27:51,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 343 transitions, 3260 flow, removed 29 selfloop flow, removed 5 redundant places. [2022-07-12 10:27:51,872 INFO L242 Difference]: Finished difference. Result has 263 places, 307 transitions, 2930 flow [2022-07-12 10:27:51,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2930, PETRI_PLACES=263, PETRI_TRANSITIONS=307} [2022-07-12 10:27:51,873 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 171 predicate places. [2022-07-12 10:27:51,873 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 307 transitions, 2930 flow [2022-07-12 10:27:51,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:51,874 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:27:51,874 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:27:51,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 10:27:52,079 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,SelfDestructingSolverStorable17 [2022-07-12 10:27:52,080 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:27:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:27:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2103120229, now seen corresponding path program 7 times [2022-07-12 10:27:52,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:27:52,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381507717] [2022-07-12 10:27:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:27:52,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:27:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:27:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381507717] [2022-07-12 10:27:52,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381507717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:27:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181105768] [2022-07-12 10:27:52,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:27:52,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:27:52,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:27:52,535 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) [2022-07-12 10:27:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:27:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:27:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 10:27:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:27:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:53,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:27:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:27:55,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181105768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:27:55,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:27:55,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-12 10:27:55,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684087514] [2022-07-12 10:27:55,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:27:55,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 10:27:55,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:27:55,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 10:27:55,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 10:27:55,938 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-12 10:27:55,940 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 307 transitions, 2930 flow. Second operand has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:27:55,940 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:27:55,940 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-12 10:27:55,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:28:38,316 INFO L129 PetriNetUnfolder]: 8004/24504 cut-off events. [2022-07-12 10:28:38,316 INFO L130 PetriNetUnfolder]: For 307428/307620 co-relation queries the response was YES. [2022-07-12 10:28:38,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138898 conditions, 24504 events. 8004/24504 cut-off events. For 307428/307620 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 303650 event pairs, 717 based on Foata normal form. 429/24873 useless extension candidates. Maximal degree in co-relation 138813. Up to 5384 conditions per place. [2022-07-12 10:28:38,632 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 868 selfloop transitions, 335 changer transitions 0/1266 dead transitions. [2022-07-12 10:28:38,632 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1266 transitions, 16029 flow [2022-07-12 10:28:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-12 10:28:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-12 10:28:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6529 transitions. [2022-07-12 10:28:38,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.66082995951417 [2022-07-12 10:28:38,641 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6529 transitions. [2022-07-12 10:28:38,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6529 transitions. [2022-07-12 10:28:38,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:28:38,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6529 transitions. [2022-07-12 10:28:38,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 68.72631578947369) internal successors, (6529), 95 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:28:38,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:28:38,665 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:28:38,665 INFO L186 Difference]: Start difference. First operand has 263 places, 307 transitions, 2930 flow. Second operand 95 states and 6529 transitions. [2022-07-12 10:28:38,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1266 transitions, 16029 flow [2022-07-12 10:28:39,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1266 transitions, 15900 flow, removed 52 selfloop flow, removed 6 redundant places. [2022-07-12 10:28:39,990 INFO L242 Difference]: Finished difference. Result has 389 places, 588 transitions, 7784 flow [2022-07-12 10:28:39,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7784, PETRI_PLACES=389, PETRI_TRANSITIONS=588} [2022-07-12 10:28:39,991 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 297 predicate places. [2022-07-12 10:28:39,991 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 588 transitions, 7784 flow [2022-07-12 10:28:39,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:28:39,992 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:28:39,992 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:28:39,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:28:40,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:28:40,193 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:28:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:28:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash 88614813, now seen corresponding path program 8 times [2022-07-12 10:28:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:28:40,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134437795] [2022-07-12 10:28:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:28:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:28:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:28:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:28:40,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:28:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134437795] [2022-07-12 10:28:40,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134437795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:28:40,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539583990] [2022-07-12 10:28:40,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:28:40,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:28:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:28:40,654 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) [2022-07-12 10:28:40,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:28:40,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:28:40,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:28:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 10:28:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:28:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:28:41,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:28:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:28:49,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539583990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:28:49,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:28:49,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 39 [2022-07-12 10:28:49,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743022295] [2022-07-12 10:28:49,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:28:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 10:28:49,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:28:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 10:28:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1317, Unknown=1, NotChecked=0, Total=1482 [2022-07-12 10:28:49,355 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-12 10:28:49,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 588 transitions, 7784 flow. Second operand has 39 states, 39 states have (on average 65.7948717948718) internal successors, (2566), 39 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:28:49,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:28:49,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-12 10:28:49,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:30:01,180 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 67 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:30:53,074 INFO L129 PetriNetUnfolder]: 18024/54471 cut-off events. [2022-07-12 10:30:53,075 INFO L130 PetriNetUnfolder]: For 1283973/1284455 co-relation queries the response was YES. [2022-07-12 10:30:54,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381786 conditions, 54471 events. 18024/54471 cut-off events. For 1283973/1284455 co-relation queries the response was YES. Maximal size of possible extension queue 2325. Compared 755803 event pairs, 2009 based on Foata normal form. 1156/55422 useless extension candidates. Maximal degree in co-relation 381664. Up to 10010 conditions per place. [2022-07-12 10:30:54,822 INFO L132 encePairwiseOnDemand]: 81/104 looper letters, 1459 selfloop transitions, 766 changer transitions 0/2288 dead transitions. [2022-07-12 10:30:54,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 2288 transitions, 35225 flow [2022-07-12 10:30:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-07-12 10:30:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-07-12 10:30:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 6658 transitions. [2022-07-12 10:30:54,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6599920697858842 [2022-07-12 10:30:54,830 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 6658 transitions. [2022-07-12 10:30:54,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 6658 transitions. [2022-07-12 10:30:54,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:30:54,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 6658 transitions. [2022-07-12 10:30:54,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 68.63917525773196) internal successors, (6658), 97 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:54,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 104.0) internal successors, (10192), 98 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:54,854 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 104.0) internal successors, (10192), 98 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:30:54,854 INFO L186 Difference]: Start difference. First operand has 389 places, 588 transitions, 7784 flow. Second operand 97 states and 6658 transitions. [2022-07-12 10:30:54,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 2288 transitions, 35225 flow [2022-07-12 10:31:15,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2288 transitions, 32258 flow, removed 1471 selfloop flow, removed 6 redundant places. [2022-07-12 10:31:15,485 INFO L242 Difference]: Finished difference. Result has 516 places, 1116 transitions, 16784 flow [2022-07-12 10:31:15,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=16784, PETRI_PLACES=516, PETRI_TRANSITIONS=1116} [2022-07-12 10:31:15,486 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 424 predicate places. [2022-07-12 10:31:15,487 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1116 transitions, 16784 flow [2022-07-12 10:31:15,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 65.7948717948718) internal successors, (2566), 39 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:15,488 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:15,488 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:15,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 10:31:15,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:15,697 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:15,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2144705093, now seen corresponding path program 9 times [2022-07-12 10:31:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:15,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873152771] [2022-07-12 10:31:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873152771] [2022-07-12 10:31:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873152771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496438363] [2022-07-12 10:31:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:31:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:16,112 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) [2022-07-12 10:31:16,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:31:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 10:31:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 10:31:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:26,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496438363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:26,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:26,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 16] total 40 [2022-07-12 10:31:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554910132] [2022-07-12 10:31:26,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 10:31:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 10:31:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1313, Unknown=2, NotChecked=0, Total=1560 [2022-07-12 10:31:26,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-07-12 10:31:26,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1116 transitions, 16784 flow. Second operand has 40 states, 40 states have (on average 69.45) internal successors, (2778), 40 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:31:26,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:26,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-07-12 10:31:26,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:31,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []