./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.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 a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:42:46,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:42:46,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:42:46,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:42:46,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:42:46,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:42:46,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:42:46,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:42:46,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:42:46,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:42:46,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:42:46,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:42:46,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:42:46,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:42:46,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:42:46,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:42:46,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:42:46,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:42:46,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:42:46,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:42:46,819 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:42:46,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:42:46,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:42:46,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:42:46,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:42:46,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:42:46,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:42:46,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:42:46,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:42:46,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:42:46,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:42:46,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:42:46,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:42:46,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:42:46,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:42:46,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:42:46,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:42:46,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:42:46,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:42:46,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:42:46,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:42:46,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:42:46,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:42:46,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:42:46,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:42:46,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:42:46,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:42:46,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:42:46,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:42:46,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:42:46,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:42:46,865 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:42:46,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:42:46,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:42:46,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:42:46,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:42:46,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:42:46,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:42:46,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:42:46,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:42:46,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:42:46,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:42:46,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:42:46,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:42:46,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:42:46,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:42:46,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:42:46,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:42:46,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:42:46,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:42:46,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:42:46,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:42:46,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:42:46,869 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:42:46,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:42:46,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:42:46,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-07-19 21:42:47,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:42:47,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:42:47,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:42:47,069 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:42:47,070 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:42:47,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-07-19 21:42:47,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03083ef8b/a3a94e5e7e9c45e2a28caad5bc8d8745/FLAGcc58a84ec [2022-07-19 21:42:47,495 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:42:47,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-07-19 21:42:47,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03083ef8b/a3a94e5e7e9c45e2a28caad5bc8d8745/FLAGcc58a84ec [2022-07-19 21:42:47,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03083ef8b/a3a94e5e7e9c45e2a28caad5bc8d8745 [2022-07-19 21:42:47,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:42:47,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:42:47,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:42:47,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:42:47,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:42:47,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b615d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47, skipping insertion in model container [2022-07-19 21:42:47,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:42:47,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:42:47,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-07-19 21:42:47,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:42:47,676 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:42:47,704 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-07-19 21:42:47,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:42:47,713 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:42:47,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47 WrapperNode [2022-07-19 21:42:47,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:42:47,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:42:47,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:42:47,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:42:47,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,745 INFO L137 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-19 21:42:47,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:42:47,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:42:47,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:42:47,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:42:47,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:42:47,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:42:47,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:42:47,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:42:47,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (1/1) ... [2022-07-19 21:42:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:42:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:47,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:42:47,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:42:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:42:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:42:47,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:42:47,821 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:42:47,821 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:42:47,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:42:47,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:42:47,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:42:47,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:42:47,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:42:47,824 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:42:47,876 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:42:47,877 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:42:48,074 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:42:48,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:42:48,112 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:42:48,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:42:48 BoogieIcfgContainer [2022-07-19 21:42:48,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:42:48,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:42:48,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:42:48,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:42:48,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:42:47" (1/3) ... [2022-07-19 21:42:48,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3214dd67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:42:48, skipping insertion in model container [2022-07-19 21:42:48,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:42:47" (2/3) ... [2022-07-19 21:42:48,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3214dd67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:42:48, skipping insertion in model container [2022-07-19 21:42:48,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:42:48" (3/3) ... [2022-07-19 21:42:48,123 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-07-19 21:42:48,133 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:42:48,140 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:42:48,140 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:42:48,140 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:42:48,190 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:42:48,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-07-19 21:42:48,305 INFO L129 PetriNetUnfolder]: 8/112 cut-off events. [2022-07-19 21:42:48,307 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:42:48,311 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-07-19 21:42:48,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2022-07-19 21:42:48,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2022-07-19 21:42:48,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:42:48,332 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@5fb3f9fc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76ee213b [2022-07-19 21:42:48,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:42:48,346 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2022-07-19 21:42:48,350 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:42:48,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:48,351 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] [2022-07-19 21:42:48,351 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 1 more)] === [2022-07-19 21:42:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2022-07-19 21:42:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:48,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965957818] [2022-07-19 21:42:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:48,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965957818] [2022-07-19 21:42:48,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965957818] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:42:48,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:42:48,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:42:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585707087] [2022-07-19 21:42:48,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:42:48,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:42:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:42:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:42:48,970 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-07-19 21:42:48,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:48,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:48,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-07-19 21:42:48,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:49,473 INFO L129 PetriNetUnfolder]: 349/957 cut-off events. [2022-07-19 21:42:49,473 INFO L130 PetriNetUnfolder]: For 110/121 co-relation queries the response was YES. [2022-07-19 21:42:49,477 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 957 events. 349/957 cut-off events. For 110/121 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5712 event pairs, 108 based on Foata normal form. 120/948 useless extension candidates. Maximal degree in co-relation 1341. Up to 296 conditions per place. [2022-07-19 21:42:49,483 INFO L132 encePairwiseOnDemand]: 99/115 looper letters, 71 selfloop transitions, 16 changer transitions 3/146 dead transitions. [2022-07-19 21:42:49,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 523 flow [2022-07-19 21:42:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:42:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:42:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 801 transitions. [2022-07-19 21:42:49,497 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6965217391304348 [2022-07-19 21:42:49,498 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 801 transitions. [2022-07-19 21:42:49,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 801 transitions. [2022-07-19 21:42:49,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:49,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 801 transitions. [2022-07-19 21:42:49,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.1) internal successors, (801), 10 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:49,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:49,516 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:49,518 INFO L186 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 10 states and 801 transitions. [2022-07-19 21:42:49,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 523 flow [2022-07-19 21:42:49,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 146 transitions, 489 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:42:49,531 INFO L242 Difference]: Finished difference. Result has 110 places, 108 transitions, 291 flow [2022-07-19 21:42:49,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=291, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2022-07-19 21:42:49,538 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-19 21:42:49,538 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 291 flow [2022-07-19 21:42:49,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:49,539 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:49,539 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] [2022-07-19 21:42:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:42:49,540 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 1 more)] === [2022-07-19 21:42:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1633833426, now seen corresponding path program 1 times [2022-07-19 21:42:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561039985] [2022-07-19 21:42:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561039985] [2022-07-19 21:42:49,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561039985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:42:49,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:42:49,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:42:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854949178] [2022-07-19 21:42:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:42:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:42:49,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:42:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:42:49,820 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2022-07-19 21:42:49,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 75.28571428571429) internal successors, (527), 7 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:49,821 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:49,821 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2022-07-19 21:42:49,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:50,061 INFO L129 PetriNetUnfolder]: 441/1080 cut-off events. [2022-07-19 21:42:50,061 INFO L130 PetriNetUnfolder]: For 429/459 co-relation queries the response was YES. [2022-07-19 21:42:50,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2256 conditions, 1080 events. 441/1080 cut-off events. For 429/459 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6665 event pairs, 97 based on Foata normal form. 0/972 useless extension candidates. Maximal degree in co-relation 1433. Up to 315 conditions per place. [2022-07-19 21:42:50,069 INFO L132 encePairwiseOnDemand]: 108/115 looper letters, 71 selfloop transitions, 7 changer transitions 0/136 dead transitions. [2022-07-19 21:42:50,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 136 transitions, 560 flow [2022-07-19 21:42:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:42:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:42:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2022-07-19 21:42:50,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2022-07-19 21:42:50,071 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 552 transitions. [2022-07-19 21:42:50,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 552 transitions. [2022-07-19 21:42:50,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:50,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 552 transitions. [2022-07-19 21:42:50,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,074 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,075 INFO L186 Difference]: Start difference. First operand has 110 places, 108 transitions, 291 flow. Second operand 7 states and 552 transitions. [2022-07-19 21:42:50,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 136 transitions, 560 flow [2022-07-19 21:42:50,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 136 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:42:50,082 INFO L242 Difference]: Finished difference. Result has 113 places, 111 transitions, 318 flow [2022-07-19 21:42:50,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2022-07-19 21:42:50,082 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 10 predicate places. [2022-07-19 21:42:50,083 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 318 flow [2022-07-19 21:42:50,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.28571428571429) internal successors, (527), 7 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:50,083 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] [2022-07-19 21:42:50,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:42:50,084 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 1 more)] === [2022-07-19 21:42:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1892032191, now seen corresponding path program 1 times [2022-07-19 21:42:50,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:50,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974378234] [2022-07-19 21:42:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:50,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974378234] [2022-07-19 21:42:50,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974378234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:42:50,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:42:50,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:42:50,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767957434] [2022-07-19 21:42:50,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:42:50,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:42:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:42:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:42:50,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2022-07-19 21:42:50,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:50,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2022-07-19 21:42:50,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:50,496 INFO L129 PetriNetUnfolder]: 895/1759 cut-off events. [2022-07-19 21:42:50,497 INFO L130 PetriNetUnfolder]: For 864/868 co-relation queries the response was YES. [2022-07-19 21:42:50,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 1759 events. 895/1759 cut-off events. For 864/868 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10354 event pairs, 56 based on Foata normal form. 4/1660 useless extension candidates. Maximal degree in co-relation 3118. Up to 603 conditions per place. [2022-07-19 21:42:50,506 INFO L132 encePairwiseOnDemand]: 107/115 looper letters, 83 selfloop transitions, 16 changer transitions 0/171 dead transitions. [2022-07-19 21:42:50,508 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 722 flow [2022-07-19 21:42:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:42:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:42:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2022-07-19 21:42:50,510 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8347826086956521 [2022-07-19 21:42:50,511 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2022-07-19 21:42:50,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2022-07-19 21:42:50,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:50,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2022-07-19 21:42:50,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,516 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,516 INFO L186 Difference]: Start difference. First operand has 113 places, 111 transitions, 318 flow. Second operand 8 states and 768 transitions. [2022-07-19 21:42:50,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 722 flow [2022-07-19 21:42:50,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 716 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:42:50,526 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 441 flow [2022-07-19 21:42:50,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-07-19 21:42:50,529 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 19 predicate places. [2022-07-19 21:42:50,529 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 441 flow [2022-07-19 21:42:50,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,530 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:50,530 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] [2022-07-19 21:42:50,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:42:50,530 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 1 more)] === [2022-07-19 21:42:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash -344235847, now seen corresponding path program 2 times [2022-07-19 21:42:50,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:50,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144562751] [2022-07-19 21:42:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:50,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144562751] [2022-07-19 21:42:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144562751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627518735] [2022-07-19 21:42:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:42:50,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:50,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:50,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:42:50,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:42:50,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 21:42:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:42:50,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:42:50,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627518735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:42:50,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:42:50,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-07-19 21:42:50,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39809272] [2022-07-19 21:42:50,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:42:50,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:42:50,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:42:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:42:50,977 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 115 [2022-07-19 21:42:50,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:50,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:50,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 115 [2022-07-19 21:42:50,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:51,211 INFO L129 PetriNetUnfolder]: 385/1052 cut-off events. [2022-07-19 21:42:51,212 INFO L130 PetriNetUnfolder]: For 1019/1041 co-relation queries the response was YES. [2022-07-19 21:42:51,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2717 conditions, 1052 events. 385/1052 cut-off events. For 1019/1041 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6425 event pairs, 69 based on Foata normal form. 22/1029 useless extension candidates. Maximal degree in co-relation 2363. Up to 374 conditions per place. [2022-07-19 21:42:51,221 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 65 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2022-07-19 21:42:51,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 772 flow [2022-07-19 21:42:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:42:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:42:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 697 transitions. [2022-07-19 21:42:51,227 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7576086956521739 [2022-07-19 21:42:51,227 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 697 transitions. [2022-07-19 21:42:51,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 697 transitions. [2022-07-19 21:42:51,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:51,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 697 transitions. [2022-07-19 21:42:51,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.125) internal successors, (697), 8 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:51,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:51,231 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:51,231 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 441 flow. Second operand 8 states and 697 transitions. [2022-07-19 21:42:51,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 772 flow [2022-07-19 21:42:51,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 154 transitions, 764 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-19 21:42:51,240 INFO L242 Difference]: Finished difference. Result has 131 places, 130 transitions, 555 flow [2022-07-19 21:42:51,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=555, PETRI_PLACES=131, PETRI_TRANSITIONS=130} [2022-07-19 21:42:51,241 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 28 predicate places. [2022-07-19 21:42:51,241 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 130 transitions, 555 flow [2022-07-19 21:42:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:51,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:51,242 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] [2022-07-19 21:42:51,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:42:51,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:51,456 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 1 more)] === [2022-07-19 21:42:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1337366013, now seen corresponding path program 1 times [2022-07-19 21:42:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38241177] [2022-07-19 21:42:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:51,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38241177] [2022-07-19 21:42:51,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38241177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:51,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317276660] [2022-07-19 21:42:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:51,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:51,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:51,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:42:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:42:51,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:51,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:42:51,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317276660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:42:51,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:42:51,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 13 [2022-07-19 21:42:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560755824] [2022-07-19 21:42:51,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:42:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:42:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:42:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-19 21:42:51,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-07-19 21:42:51,917 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 130 transitions, 555 flow. Second operand has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:51,917 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:51,917 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-07-19 21:42:51,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:52,459 INFO L129 PetriNetUnfolder]: 1720/3441 cut-off events. [2022-07-19 21:42:52,460 INFO L130 PetriNetUnfolder]: For 6518/6520 co-relation queries the response was YES. [2022-07-19 21:42:52,468 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10621 conditions, 3441 events. 1720/3441 cut-off events. For 6518/6520 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23349 event pairs, 530 based on Foata normal form. 135/3539 useless extension candidates. Maximal degree in co-relation 9692. Up to 1319 conditions per place. [2022-07-19 21:42:52,483 INFO L132 encePairwiseOnDemand]: 104/115 looper letters, 129 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2022-07-19 21:42:52,483 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 211 transitions, 1384 flow [2022-07-19 21:42:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:42:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:42:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 914 transitions. [2022-07-19 21:42:52,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7225296442687748 [2022-07-19 21:42:52,486 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 914 transitions. [2022-07-19 21:42:52,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 914 transitions. [2022-07-19 21:42:52,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:52,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 914 transitions. [2022-07-19 21:42:52,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 83.0909090909091) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:52,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:52,490 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:52,490 INFO L186 Difference]: Start difference. First operand has 131 places, 130 transitions, 555 flow. Second operand 11 states and 914 transitions. [2022-07-19 21:42:52,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 211 transitions, 1384 flow [2022-07-19 21:42:52,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 1324 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-07-19 21:42:52,537 INFO L242 Difference]: Finished difference. Result has 143 places, 138 transitions, 695 flow [2022-07-19 21:42:52,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=695, PETRI_PLACES=143, PETRI_TRANSITIONS=138} [2022-07-19 21:42:52,539 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 40 predicate places. [2022-07-19 21:42:52,539 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 138 transitions, 695 flow [2022-07-19 21:42:52,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:52,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:52,540 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] [2022-07-19 21:42:52,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:52,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:52,756 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 1 more)] === [2022-07-19 21:42:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1203340301, now seen corresponding path program 2 times [2022-07-19 21:42:52,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914866774] [2022-07-19 21:42:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:52,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914866774] [2022-07-19 21:42:52,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914866774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:52,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627608203] [2022-07-19 21:42:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:42:52,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:52,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:52,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:42:52,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:42:52,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:52,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 21:42:52,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:42:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:53,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627608203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:42:53,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:42:53,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5] total 16 [2022-07-19 21:42:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363702507] [2022-07-19 21:42:53,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:42:53,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 21:42:53,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:42:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 21:42:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:42:53,252 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 115 [2022-07-19 21:42:53,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 138 transitions, 695 flow. Second operand has 16 states, 16 states have (on average 77.0625) internal successors, (1233), 16 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:53,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:42:53,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 115 [2022-07-19 21:42:53,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:42:54,604 INFO L129 PetriNetUnfolder]: 3623/6128 cut-off events. [2022-07-19 21:42:54,604 INFO L130 PetriNetUnfolder]: For 16364/16364 co-relation queries the response was YES. [2022-07-19 21:42:54,619 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21253 conditions, 6128 events. 3623/6128 cut-off events. For 16364/16364 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37972 event pairs, 198 based on Foata normal form. 159/6252 useless extension candidates. Maximal degree in co-relation 16706. Up to 1034 conditions per place. [2022-07-19 21:42:54,653 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 249 selfloop transitions, 113 changer transitions 0/422 dead transitions. [2022-07-19 21:42:54,653 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 422 transitions, 3332 flow [2022-07-19 21:42:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 21:42:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-19 21:42:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2357 transitions. [2022-07-19 21:42:54,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7067466266866567 [2022-07-19 21:42:54,659 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2357 transitions. [2022-07-19 21:42:54,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2357 transitions. [2022-07-19 21:42:54,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:42:54,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2357 transitions. [2022-07-19 21:42:54,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 81.27586206896552) internal successors, (2357), 29 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:54,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:54,668 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:54,668 INFO L186 Difference]: Start difference. First operand has 143 places, 138 transitions, 695 flow. Second operand 29 states and 2357 transitions. [2022-07-19 21:42:54,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 422 transitions, 3332 flow [2022-07-19 21:42:54,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 422 transitions, 3222 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-07-19 21:42:54,697 INFO L242 Difference]: Finished difference. Result has 179 places, 228 transitions, 1894 flow [2022-07-19 21:42:54,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1894, PETRI_PLACES=179, PETRI_TRANSITIONS=228} [2022-07-19 21:42:54,697 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 76 predicate places. [2022-07-19 21:42:54,698 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 228 transitions, 1894 flow [2022-07-19 21:42:54,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.0625) internal successors, (1233), 16 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:42:54,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:42:54,698 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] [2022-07-19 21:42:54,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:42:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:54,911 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 1 more)] === [2022-07-19 21:42:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:42:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1270315933, now seen corresponding path program 3 times [2022-07-19 21:42:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:42:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900184718] [2022-07-19 21:42:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:42:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:42:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:42:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:56,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:42:56,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900184718] [2022-07-19 21:42:56,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900184718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:42:56,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231129835] [2022-07-19 21:42:56,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:42:56,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:42:56,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:42:56,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:42:56,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:42:56,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 21:42:56,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:42:56,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 21:42:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:42:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:42:57,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:43:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:43:27,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231129835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:43:27,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:43:27,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-19 21:43:27,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851168045] [2022-07-19 21:43:27,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:43:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 21:43:27,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:43:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 21:43:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 21:43:27,005 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 115 [2022-07-19 21:43:27,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 228 transitions, 1894 flow. Second operand has 39 states, 39 states have (on average 68.38461538461539) internal successors, (2667), 39 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:43:27,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:43:27,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 115 [2022-07-19 21:43:27,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:43:47,818 WARN L233 SmtUtils]: Spent 15.88s on a formula simplification. DAG size of input: 226 DAG size of output: 217 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:44:33,035 WARN L233 SmtUtils]: Spent 42.94s on a formula simplification. DAG size of input: 234 DAG size of output: 226 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:45:03,762 WARN L233 SmtUtils]: Spent 22.51s on a formula simplification. DAG size of input: 242 DAG size of output: 229 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:45:25,096 WARN L233 SmtUtils]: Spent 18.86s on a formula simplification. DAG size of input: 250 DAG size of output: 238 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 21:46:12,211 WARN L233 SmtUtils]: Spent 13.86s on a formula simplification. DAG size of input: 219 DAG size of output: 211 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)