./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:01:22,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:01:22,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:01:22,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:01:22,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:01:22,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:01:22,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:01:22,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:01:22,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:01:22,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:01:22,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:01:22,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:01:22,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:01:22,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:01:22,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:01:22,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:01:22,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:01:22,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:01:22,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:01:22,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:01:22,830 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:01:22,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:01:22,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:01:22,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:01:22,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:01:22,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:01:22,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:01:22,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:01:22,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:01:22,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:01:22,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:01:22,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:01:22,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:01:22,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:01:22,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:01:22,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:01:22,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:01:22,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:01:22,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:01:22,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:01:22,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:01:22,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:01:22,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:01:22,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:01:22,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:01:22,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:01:22,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:01:22,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:01:22,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:01:22,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:01:22,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:01:22,874 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:01:22,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:01:22,875 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:01:22,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:01:22,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:01:22,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:01:22,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:01:22,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:01:22,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:01:22,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:01:22,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:01:22,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:01:22,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:01:22,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:01:22,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:01:22,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:01:22,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:01:22,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:01:22,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:01:22,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:01:22,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:01:22,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:01:22,879 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:01:22,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:01:22,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:01:22,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2022-07-13 22:01:23,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:01:23,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:01:23,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:01:23,094 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:01:23,094 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:01:23,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-13 22:01:23,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ace52797/b385e954ea444d4fa1f0eccfbf371997/FLAG45f7551a5 [2022-07-13 22:01:23,488 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:01:23,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2022-07-13 22:01:23,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ace52797/b385e954ea444d4fa1f0eccfbf371997/FLAG45f7551a5 [2022-07-13 22:01:23,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ace52797/b385e954ea444d4fa1f0eccfbf371997 [2022-07-13 22:01:23,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:01:23,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:01:23,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:01:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:01:23,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:01:23,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6570dd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23, skipping insertion in model container [2022-07-13 22:01:23,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:01:23,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:01:23,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-13 22:01:23,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:01:23,673 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:01:23,702 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2625,2638] [2022-07-13 22:01:23,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:01:23,716 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:01:23,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23 WrapperNode [2022-07-13 22:01:23,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:01:23,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:01:23,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:01:23,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:01:23,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,760 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-07-13 22:01:23,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:01:23,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:01:23,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:01:23,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:01:23,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:01:23,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:01:23,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:01:23,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:01:23,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (1/1) ... [2022-07-13 22:01:23,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:01:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:23,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:01:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:01:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:01:23,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:01:23,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:01:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:01:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:01:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:01:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:01:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:01:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:01:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-07-13 22:01:23,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-07-13 22:01:23,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-07-13 22:01:23,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-07-13 22:01:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:01:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:01:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:01:23,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:01:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:01:23,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:01:23,907 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:01:23,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:01:23,991 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:01:23,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:01:24,204 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:01:24,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:01:24,210 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 22:01:24,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:01:24 BoogieIcfgContainer [2022-07-13 22:01:24,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:01:24,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:01:24,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:01:24,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:01:24,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:01:23" (1/3) ... [2022-07-13 22:01:24,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a405e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:01:24, skipping insertion in model container [2022-07-13 22:01:24,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:01:23" (2/3) ... [2022-07-13 22:01:24,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7a405e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:01:24, skipping insertion in model container [2022-07-13 22:01:24,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:01:24" (3/3) ... [2022-07-13 22:01:24,217 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2022-07-13 22:01:24,220 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:01:24,226 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:01:24,226 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:01:24,226 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:01:24,271 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-13 22:01:24,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2022-07-13 22:01:24,396 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2022-07-13 22:01:24,396 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 22:01:24,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2022-07-13 22:01:24,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2022-07-13 22:01:24,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2022-07-13 22:01:24,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:01:24,423 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@3859decb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3dac4a1f [2022-07-13 22:01:24,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-13 22:01:24,464 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2022-07-13 22:01:24,464 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 22:01:24,464 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:24,465 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:24,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1805930400, now seen corresponding path program 1 times [2022-07-13 22:01:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884394942] [2022-07-13 22:01:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:24,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884394942] [2022-07-13 22:01:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884394942] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:24,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:24,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:01:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049469100] [2022-07-13 22:01:24,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:01:24,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:24,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:01:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:01:24,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2022-07-13 22:01:24,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:24,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:24,790 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2022-07-13 22:01:24,790 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:24,828 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2022-07-13 22:01:24,828 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-07-13 22:01:24,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2022-07-13 22:01:24,831 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2022-07-13 22:01:24,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2022-07-13 22:01:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:01:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:01:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2022-07-13 22:01:24,839 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2022-07-13 22:01:24,840 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2022-07-13 22:01:24,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2022-07-13 22:01:24,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:24,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2022-07-13 22:01:24,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:24,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:24,860 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:24,861 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2022-07-13 22:01:24,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2022-07-13 22:01:24,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-07-13 22:01:24,868 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2022-07-13 22:01:24,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2022-07-13 22:01:24,873 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2022-07-13 22:01:24,874 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2022-07-13 22:01:24,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 156.0) internal successors, (312), 2 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:24,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:24,875 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:24,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:01:24,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1921476920, now seen corresponding path program 1 times [2022-07-13 22:01:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:24,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000411523] [2022-07-13 22:01:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:25,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:25,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000411523] [2022-07-13 22:01:25,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000411523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:25,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:25,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:01:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317170939] [2022-07-13 22:01:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:25,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:01:25,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:01:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:01:25,284 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2022-07-13 22:01:25,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:25,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:25,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2022-07-13 22:01:25,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:27,137 INFO L129 PetriNetUnfolder]: 13855/19787 cut-off events. [2022-07-13 22:01:27,138 INFO L130 PetriNetUnfolder]: For 728/1092 co-relation queries the response was YES. [2022-07-13 22:01:27,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37307 conditions, 19787 events. 13855/19787 cut-off events. For 728/1092 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 113995 event pairs, 8752 based on Foata normal form. 1/13828 useless extension candidates. Maximal degree in co-relation 37304. Up to 10952 conditions per place. [2022-07-13 22:01:27,266 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2022-07-13 22:01:27,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2022-07-13 22:01:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:01:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:01:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2022-07-13 22:01:27,272 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2022-07-13 22:01:27,273 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2022-07-13 22:01:27,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2022-07-13 22:01:27,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:27,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2022-07-13 22:01:27,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:27,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:27,285 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:27,285 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2022-07-13 22:01:27,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2022-07-13 22:01:27,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:01:27,288 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2022-07-13 22:01:27,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2022-07-13 22:01:27,289 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2022-07-13 22:01:27,289 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2022-07-13 22:01:27,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:27,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:27,304 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:27,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:01:27,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 856396636, now seen corresponding path program 1 times [2022-07-13 22:01:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:27,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737358153] [2022-07-13 22:01:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737358153] [2022-07-13 22:01:27,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737358153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:01:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163431812] [2022-07-13 22:01:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:27,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:01:27,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:01:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:01:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:01:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:27,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:01:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:28,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163431812] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:01:28,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:01:28,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 22:01:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232173312] [2022-07-13 22:01:28,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:01:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:01:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:01:28,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:01:28,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-13 22:01:28,146 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:28,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:28,146 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-13 22:01:28,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:31,233 INFO L129 PetriNetUnfolder]: 27630/39510 cut-off events. [2022-07-13 22:01:31,233 INFO L130 PetriNetUnfolder]: For 8413/8511 co-relation queries the response was YES. [2022-07-13 22:01:31,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87882 conditions, 39510 events. 27630/39510 cut-off events. For 8413/8511 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 252409 event pairs, 4983 based on Foata normal form. 0/28288 useless extension candidates. Maximal degree in co-relation 87875. Up to 10656 conditions per place. [2022-07-13 22:01:31,618 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 207 selfloop transitions, 30 changer transitions 1/322 dead transitions. [2022-07-13 22:01:31,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 1316 flow [2022-07-13 22:01:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:01:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 22:01:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1728 transitions. [2022-07-13 22:01:31,622 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7303465765004227 [2022-07-13 22:01:31,622 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1728 transitions. [2022-07-13 22:01:31,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1728 transitions. [2022-07-13 22:01:31,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:31,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1728 transitions. [2022-07-13 22:01:31,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.42857142857143) internal successors, (1728), 14 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:31,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:31,630 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:31,630 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 14 states and 1728 transitions. [2022-07-13 22:01:31,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 1316 flow [2022-07-13 22:01:31,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 322 transitions, 1289 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-07-13 22:01:31,641 INFO L242 Difference]: Finished difference. Result has 162 places, 160 transitions, 522 flow [2022-07-13 22:01:31,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=522, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-07-13 22:01:31,642 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 11 predicate places. [2022-07-13 22:01:31,643 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 522 flow [2022-07-13 22:01:31,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 110.57142857142857) internal successors, (1548), 14 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:31,643 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:31,643 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:31,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:01:31,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:31,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1314069844, now seen corresponding path program 2 times [2022-07-13 22:01:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:31,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363617966] [2022-07-13 22:01:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:32,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:32,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363617966] [2022-07-13 22:01:32,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363617966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:32,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:32,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:01:32,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858080276] [2022-07-13 22:01:32,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:32,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:01:32,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:01:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:01:32,126 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-13 22:01:32,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 522 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:32,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:32,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-13 22:01:32,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:34,832 INFO L129 PetriNetUnfolder]: 25967/37698 cut-off events. [2022-07-13 22:01:34,832 INFO L130 PetriNetUnfolder]: For 41843/42094 co-relation queries the response was YES. [2022-07-13 22:01:34,937 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103428 conditions, 37698 events. 25967/37698 cut-off events. For 41843/42094 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 245982 event pairs, 2103 based on Foata normal form. 325/30114 useless extension candidates. Maximal degree in co-relation 103415. Up to 27357 conditions per place. [2022-07-13 22:01:35,099 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 98 selfloop transitions, 19 changer transitions 1/202 dead transitions. [2022-07-13 22:01:35,100 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 924 flow [2022-07-13 22:01:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:01:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:01:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-13 22:01:35,102 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-13 22:01:35,102 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-13 22:01:35,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-13 22:01:35,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:35,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-13 22:01:35,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:35,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:35,105 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:35,105 INFO L186 Difference]: Start difference. First operand has 162 places, 160 transitions, 522 flow. Second operand 6 states and 738 transitions. [2022-07-13 22:01:35,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 924 flow [2022-07-13 22:01:35,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 202 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:01:35,239 INFO L242 Difference]: Finished difference. Result has 165 places, 166 transitions, 618 flow [2022-07-13 22:01:35,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=618, PETRI_PLACES=165, PETRI_TRANSITIONS=166} [2022-07-13 22:01:35,240 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 14 predicate places. [2022-07-13 22:01:35,240 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 166 transitions, 618 flow [2022-07-13 22:01:35,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:35,241 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:35,241 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:35,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:01:35,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash -598835330, now seen corresponding path program 1 times [2022-07-13 22:01:35,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:35,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414196078] [2022-07-13 22:01:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:35,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:35,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:35,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414196078] [2022-07-13 22:01:35,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414196078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:35,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:35,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:01:35,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010848363] [2022-07-13 22:01:35,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:35,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:01:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:01:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:01:35,467 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-13 22:01:35,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 166 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:35,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:35,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-13 22:01:35,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:38,283 INFO L129 PetriNetUnfolder]: 25731/36409 cut-off events. [2022-07-13 22:01:38,283 INFO L130 PetriNetUnfolder]: For 60756/60880 co-relation queries the response was YES. [2022-07-13 22:01:38,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107878 conditions, 36409 events. 25731/36409 cut-off events. For 60756/60880 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 226401 event pairs, 5946 based on Foata normal form. 1/27885 useless extension candidates. Maximal degree in co-relation 107862. Up to 27357 conditions per place. [2022-07-13 22:01:38,545 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 105 selfloop transitions, 27 changer transitions 1/217 dead transitions. [2022-07-13 22:01:38,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 217 transitions, 1163 flow [2022-07-13 22:01:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:01:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:01:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 739 transitions. [2022-07-13 22:01:38,547 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7287968441814595 [2022-07-13 22:01:38,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 739 transitions. [2022-07-13 22:01:38,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 739 transitions. [2022-07-13 22:01:38,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:38,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 739 transitions. [2022-07-13 22:01:38,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.16666666666667) internal successors, (739), 6 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:38,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:38,551 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:38,551 INFO L186 Difference]: Start difference. First operand has 165 places, 166 transitions, 618 flow. Second operand 6 states and 739 transitions. [2022-07-13 22:01:38,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 217 transitions, 1163 flow [2022-07-13 22:01:38,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 1100 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-07-13 22:01:38,627 INFO L242 Difference]: Finished difference. Result has 169 places, 176 transitions, 748 flow [2022-07-13 22:01:38,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=169, PETRI_TRANSITIONS=176} [2022-07-13 22:01:38,628 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 18 predicate places. [2022-07-13 22:01:38,628 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 176 transitions, 748 flow [2022-07-13 22:01:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:38,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:38,629 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:38,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:01:38,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -468160624, now seen corresponding path program 2 times [2022-07-13 22:01:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548195077] [2022-07-13 22:01:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:38,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:38,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:38,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548195077] [2022-07-13 22:01:38,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548195077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:01:38,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322873311] [2022-07-13 22:01:38,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:01:38,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:01:38,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:01:38,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:01:38,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:01:38,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:01:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:01:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 22:01:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:01:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:39,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:01:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:39,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322873311] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:01:39,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:01:39,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-13 22:01:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566965609] [2022-07-13 22:01:39,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:01:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 22:01:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 22:01:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:01:39,367 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-13 22:01:39,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 176 transitions, 748 flow. Second operand has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:39,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:39,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-13 22:01:39,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:47,151 INFO L129 PetriNetUnfolder]: 66286/95783 cut-off events. [2022-07-13 22:01:47,151 INFO L130 PetriNetUnfolder]: For 154992/155381 co-relation queries the response was YES. [2022-07-13 22:01:47,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284484 conditions, 95783 events. 66286/95783 cut-off events. For 154992/155381 co-relation queries the response was YES. Maximal size of possible extension queue 4456. Compared 704466 event pairs, 12111 based on Foata normal form. 2409/85526 useless extension candidates. Maximal degree in co-relation 284466. Up to 26948 conditions per place. [2022-07-13 22:01:48,232 INFO L132 encePairwiseOnDemand]: 152/169 looper letters, 289 selfloop transitions, 44 changer transitions 1/418 dead transitions. [2022-07-13 22:01:48,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 418 transitions, 2633 flow [2022-07-13 22:01:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 22:01:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-13 22:01:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2022-07-13 22:01:48,236 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7295012679628065 [2022-07-13 22:01:48,236 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2022-07-13 22:01:48,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2022-07-13 22:01:48,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:48,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2022-07-13 22:01:48,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.28571428571429) internal successors, (1726), 14 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:48,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:48,242 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:48,242 INFO L186 Difference]: Start difference. First operand has 169 places, 176 transitions, 748 flow. Second operand 14 states and 1726 transitions. [2022-07-13 22:01:48,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 418 transitions, 2633 flow [2022-07-13 22:01:48,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 418 transitions, 2606 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:01:48,923 INFO L242 Difference]: Finished difference. Result has 186 places, 190 transitions, 950 flow [2022-07-13 22:01:48,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=950, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2022-07-13 22:01:48,924 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 35 predicate places. [2022-07-13 22:01:48,924 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 950 flow [2022-07-13 22:01:48,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.42857142857143) internal successors, (1560), 14 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:48,925 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:48,925 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:48,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:01:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 22:01:49,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 601801034, now seen corresponding path program 1 times [2022-07-13 22:01:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146921576] [2022-07-13 22:01:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:49,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:49,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146921576] [2022-07-13 22:01:49,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146921576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:49,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:49,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:01:49,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940263610] [2022-07-13 22:01:49,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:49,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:01:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:01:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:01:49,381 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-13 22:01:49,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 950 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:49,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:49,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-13 22:01:49,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:01:57,693 INFO L129 PetriNetUnfolder]: 65079/94562 cut-off events. [2022-07-13 22:01:57,694 INFO L130 PetriNetUnfolder]: For 278930/279421 co-relation queries the response was YES. [2022-07-13 22:01:58,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325402 conditions, 94562 events. 65079/94562 cut-off events. For 278930/279421 co-relation queries the response was YES. Maximal size of possible extension queue 4654. Compared 705855 event pairs, 30842 based on Foata normal form. 246/82525 useless extension candidates. Maximal degree in co-relation 325378. Up to 76664 conditions per place. [2022-07-13 22:01:58,721 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 120 selfloop transitions, 35 changer transitions 1/240 dead transitions. [2022-07-13 22:01:58,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 240 transitions, 1592 flow [2022-07-13 22:01:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:01:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:01:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2022-07-13 22:01:58,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.727810650887574 [2022-07-13 22:01:58,724 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2022-07-13 22:01:58,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2022-07-13 22:01:58,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:01:58,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2022-07-13 22:01:58,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:58,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:58,727 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:58,727 INFO L186 Difference]: Start difference. First operand has 186 places, 190 transitions, 950 flow. Second operand 6 states and 738 transitions. [2022-07-13 22:01:58,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 240 transitions, 1592 flow [2022-07-13 22:01:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 240 transitions, 1543 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-13 22:01:59,475 INFO L242 Difference]: Finished difference. Result has 188 places, 200 transitions, 1146 flow [2022-07-13 22:01:59,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=188, PETRI_TRANSITIONS=200} [2022-07-13 22:01:59,476 INFO L279 CegarLoopForPetriNet]: 151 programPoint places, 37 predicate places. [2022-07-13 22:01:59,476 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 200 transitions, 1146 flow [2022-07-13 22:01:59,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:59,477 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:01:59,477 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:01:59,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:01:59,478 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-13 22:01:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:01:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1026495128, now seen corresponding path program 1 times [2022-07-13 22:01:59,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:01:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443203999] [2022-07-13 22:01:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:01:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:01:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:01:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:01:59,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:01:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443203999] [2022-07-13 22:01:59,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443203999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:01:59,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:01:59,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:01:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20819006] [2022-07-13 22:01:59,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:01:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:01:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:01:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:01:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:01:59,674 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2022-07-13 22:01:59,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 200 transitions, 1146 flow. Second operand has 6 states, 6 states have (on average 113.0) internal successors, (678), 6 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:01:59,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:01:59,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2022-07-13 22:01:59,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand