./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-three-array-sum.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 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:57:27,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:57:27,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:57:27,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:57:27,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:57:27,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:57:27,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:57:27,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:57:27,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:57:27,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:57:27,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:57:27,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:57:27,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:57:27,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:57:27,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:57:27,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:57:27,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:57:27,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:57:27,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:57:27,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:57:27,732 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:57:27,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:57:27,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:57:27,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:57:27,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:57:27,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:57:27,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:57:27,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:57:27,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:57:27,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:57:27,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:57:27,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:57:27,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:57:27,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:57:27,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:57:27,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:57:27,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:57:27,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:57:27,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:57:27,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:57:27,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:57:27,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:57:27,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:57:27,780 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:57:27,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:57:27,781 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:57:27,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:57:27,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:57:27,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:57:27,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:57:27,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:57:27,783 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:57:27,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:57:27,784 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:57:27,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:57:27,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:57:27,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:57:27,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:57:27,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:57:27,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:57:27,785 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:57:27,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:57:27,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:57:27,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:57:27,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:57:27,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:57:27,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:57:27,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:57:27,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:57:27,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:57:27,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:57:27,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:57:27,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:57:27,789 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:57:27,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:57:27,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:57:27,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-07-22 21:57:28,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:57:28,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:57:28,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:57:28,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:57:28,042 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:57:28,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-07-22 21:57:28,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58f167c0b/c44ecf7c88e243899a1f7f63cf33b66e/FLAG645234dc0 [2022-07-22 21:57:28,457 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:57:28,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-07-22 21:57:28,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58f167c0b/c44ecf7c88e243899a1f7f63cf33b66e/FLAG645234dc0 [2022-07-22 21:57:28,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58f167c0b/c44ecf7c88e243899a1f7f63cf33b66e [2022-07-22 21:57:28,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:57:28,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:57:28,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:57:28,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:57:28,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:57:28,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3ceb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28, skipping insertion in model container [2022-07-22 21:57:28,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:57:28,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:57:28,696 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-three-array-sum.wvr.c[2691,2704] [2022-07-22 21:57:28,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:57:28,718 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:57:28,739 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-three-array-sum.wvr.c[2691,2704] [2022-07-22 21:57:28,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:57:28,754 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:57:28,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28 WrapperNode [2022-07-22 21:57:28,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:57:28,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:57:28,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:57:28,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:57:28,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,795 INFO L137 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 150 [2022-07-22 21:57:28,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:57:28,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:57:28,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:57:28,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:57:28,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:57:28,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:57:28,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:57:28,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:57:28,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (1/1) ... [2022-07-22 21:57:28,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:57:28,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:28,859 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) [2022-07-22 21:57:28,868 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 [2022-07-22 21:57:28,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:57:28,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:57:28,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:57:28,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:57:28,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:57:28,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:57:28,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:57:28,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:57:28,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:57:28,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:57:28,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:57:28,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:57:28,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:57:28,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:57:28,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:57:28,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:57:28,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:57:28,894 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:57:28,964 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:57:28,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:57:29,223 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:57:29,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:57:29,284 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-22 21:57:29,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:57:29 BoogieIcfgContainer [2022-07-22 21:57:29,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:57:29,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:57:29,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:57:29,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:57:29,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:57:28" (1/3) ... [2022-07-22 21:57:29,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a84e806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:57:29, skipping insertion in model container [2022-07-22 21:57:29,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:57:28" (2/3) ... [2022-07-22 21:57:29,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a84e806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:57:29, skipping insertion in model container [2022-07-22 21:57:29,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:57:29" (3/3) ... [2022-07-22 21:57:29,295 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2022-07-22 21:57:29,299 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:57:29,308 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:57:29,308 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:57:29,308 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:57:29,406 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:57:29,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 218 places, 228 transitions, 480 flow [2022-07-22 21:57:29,534 INFO L129 PetriNetUnfolder]: 20/225 cut-off events. [2022-07-22 21:57:29,534 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:57:29,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 225 events. 20/225 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 184. Up to 3 conditions per place. [2022-07-22 21:57:29,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 228 transitions, 480 flow [2022-07-22 21:57:29,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 214 transitions, 446 flow [2022-07-22 21:57:29,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:57:29,561 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@853781b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e6ed2b1 [2022-07-22 21:57:29,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:57:29,603 INFO L129 PetriNetUnfolder]: 20/213 cut-off events. [2022-07-22 21:57:29,604 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:57:29,604 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:29,605 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:29,605 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)] === [2022-07-22 21:57:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:29,610 INFO L85 PathProgramCache]: Analyzing trace with hash -504584022, now seen corresponding path program 1 times [2022-07-22 21:57:29,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:29,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242758612] [2022-07-22 21:57:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242758612] [2022-07-22 21:57:29,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242758612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:29,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:29,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:57:29,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636064489] [2022-07-22 21:57:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:57:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:57:29,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:57:29,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 228 [2022-07-22 21:57:29,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 214 transitions, 446 flow. Second operand has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:29,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:29,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 228 [2022-07-22 21:57:29,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:30,033 INFO L129 PetriNetUnfolder]: 20/247 cut-off events. [2022-07-22 21:57:30,034 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-22 21:57:30,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 247 events. 20/247 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 322 event pairs, 7 based on Foata normal form. 31/258 useless extension candidates. Maximal degree in co-relation 176. Up to 28 conditions per place. [2022-07-22 21:57:30,037 INFO L132 encePairwiseOnDemand]: 215/228 looper letters, 8 selfloop transitions, 0 changer transitions 7/201 dead transitions. [2022-07-22 21:57:30,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 436 flow [2022-07-22 21:57:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:57:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:57:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 433 transitions. [2022-07-22 21:57:30,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9495614035087719 [2022-07-22 21:57:30,051 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 433 transitions. [2022-07-22 21:57:30,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 433 transitions. [2022-07-22 21:57:30,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:30,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 433 transitions. [2022-07-22 21:57:30,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 216.5) internal successors, (433), 2 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,065 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,067 INFO L186 Difference]: Start difference. First operand has 204 places, 214 transitions, 446 flow. Second operand 2 states and 433 transitions. [2022-07-22 21:57:30,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 436 flow [2022-07-22 21:57:30,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 201 transitions, 424 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:57:30,075 INFO L242 Difference]: Finished difference. Result has 199 places, 194 transitions, 394 flow [2022-07-22 21:57:30,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=394, PETRI_PLACES=199, PETRI_TRANSITIONS=194} [2022-07-22 21:57:30,080 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -5 predicate places. [2022-07-22 21:57:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 194 transitions, 394 flow [2022-07-22 21:57:30,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:30,081 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:57:30,082 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)] === [2022-07-22 21:57:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:30,083 INFO L85 PathProgramCache]: Analyzing trace with hash -343539870, now seen corresponding path program 1 times [2022-07-22 21:57:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860310070] [2022-07-22 21:57:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:30,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:30,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860310070] [2022-07-22 21:57:30,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860310070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:30,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:30,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:57:30,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830049082] [2022-07-22 21:57:30,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:30,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:30,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:57:30,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 228 [2022-07-22 21:57:30,568 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 194 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:30,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 228 [2022-07-22 21:57:30,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:30,807 INFO L129 PetriNetUnfolder]: 70/452 cut-off events. [2022-07-22 21:57:30,807 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-22 21:57:30,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 452 events. 70/452 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1486 event pairs, 17 based on Foata normal form. 1/413 useless extension candidates. Maximal degree in co-relation 590. Up to 62 conditions per place. [2022-07-22 21:57:30,813 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 52 selfloop transitions, 6 changer transitions 4/215 dead transitions. [2022-07-22 21:57:30,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 215 transitions, 568 flow [2022-07-22 21:57:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:57:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:57:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1225 transitions. [2022-07-22 21:57:30,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7675438596491229 [2022-07-22 21:57:30,822 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1225 transitions. [2022-07-22 21:57:30,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1225 transitions. [2022-07-22 21:57:30,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:30,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1225 transitions. [2022-07-22 21:57:30,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 175.0) internal successors, (1225), 7 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,833 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,833 INFO L186 Difference]: Start difference. First operand has 199 places, 194 transitions, 394 flow. Second operand 7 states and 1225 transitions. [2022-07-22 21:57:30,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 215 transitions, 568 flow [2022-07-22 21:57:30,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 215 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:57:30,844 INFO L242 Difference]: Finished difference. Result has 201 places, 197 transitions, 425 flow [2022-07-22 21:57:30,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=201, PETRI_TRANSITIONS=197} [2022-07-22 21:57:30,845 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, -3 predicate places. [2022-07-22 21:57:30,846 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 197 transitions, 425 flow [2022-07-22 21:57:30,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 171.28571428571428) internal successors, (1199), 7 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:30,847 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:30,847 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:30,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:57:30,848 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)] === [2022-07-22 21:57:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1180149095, now seen corresponding path program 1 times [2022-07-22 21:57:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:30,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079645815] [2022-07-22 21:57:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:30,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:31,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:31,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079645815] [2022-07-22 21:57:31,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079645815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:31,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:31,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:57:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379401076] [2022-07-22 21:57:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:31,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:31,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:57:31,046 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 228 [2022-07-22 21:57:31,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 197 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:31,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:31,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 228 [2022-07-22 21:57:31,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:31,689 INFO L129 PetriNetUnfolder]: 1164/2746 cut-off events. [2022-07-22 21:57:31,689 INFO L130 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2022-07-22 21:57:31,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4703 conditions, 2746 events. 1164/2746 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17632 event pairs, 581 based on Foata normal form. 0/2087 useless extension candidates. Maximal degree in co-relation 4696. Up to 1051 conditions per place. [2022-07-22 21:57:31,712 INFO L132 encePairwiseOnDemand]: 209/228 looper letters, 120 selfloop transitions, 28 changer transitions 0/288 dead transitions. [2022-07-22 21:57:31,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 288 transitions, 919 flow [2022-07-22 21:57:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:57:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:57:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1887 transitions. [2022-07-22 21:57:31,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7523923444976076 [2022-07-22 21:57:31,719 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1887 transitions. [2022-07-22 21:57:31,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1887 transitions. [2022-07-22 21:57:31,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:31,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1887 transitions. [2022-07-22 21:57:31,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.54545454545453) internal successors, (1887), 11 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:31,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:31,731 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:31,732 INFO L186 Difference]: Start difference. First operand has 201 places, 197 transitions, 425 flow. Second operand 11 states and 1887 transitions. [2022-07-22 21:57:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 288 transitions, 919 flow [2022-07-22 21:57:31,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 288 transitions, 913 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:57:31,740 INFO L242 Difference]: Finished difference. Result has 210 places, 214 transitions, 552 flow [2022-07-22 21:57:31,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=552, PETRI_PLACES=210, PETRI_TRANSITIONS=214} [2022-07-22 21:57:31,741 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 6 predicate places. [2022-07-22 21:57:31,741 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 214 transitions, 552 flow [2022-07-22 21:57:31,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.85714285714286) internal successors, (1147), 7 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:31,742 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:31,742 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:31,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:57:31,743 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)] === [2022-07-22 21:57:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -83321624, now seen corresponding path program 1 times [2022-07-22 21:57:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728696688] [2022-07-22 21:57:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:31,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:57:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728696688] [2022-07-22 21:57:31,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728696688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:57:31,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:57:31,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:57:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769156970] [2022-07-22 21:57:31,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:31,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:57:31,885 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 228 [2022-07-22 21:57:31,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 214 transitions, 552 flow. Second operand has 7 states, 7 states have (on average 162.85714285714286) internal successors, (1140), 7 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:31,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:31,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 228 [2022-07-22 21:57:31,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:32,414 INFO L129 PetriNetUnfolder]: 894/2275 cut-off events. [2022-07-22 21:57:32,414 INFO L130 PetriNetUnfolder]: For 585/615 co-relation queries the response was YES. [2022-07-22 21:57:32,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4196 conditions, 2275 events. 894/2275 cut-off events. For 585/615 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13675 event pairs, 481 based on Foata normal form. 30/1960 useless extension candidates. Maximal degree in co-relation 4186. Up to 1093 conditions per place. [2022-07-22 21:57:32,430 INFO L132 encePairwiseOnDemand]: 209/228 looper letters, 56 selfloop transitions, 14 changer transitions 77/286 dead transitions. [2022-07-22 21:57:32,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 1018 flow [2022-07-22 21:57:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:57:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:57:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1873 transitions. [2022-07-22 21:57:32,435 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7468102073365231 [2022-07-22 21:57:32,435 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1873 transitions. [2022-07-22 21:57:32,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1873 transitions. [2022-07-22 21:57:32,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:32,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1873 transitions. [2022-07-22 21:57:32,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 170.27272727272728) internal successors, (1873), 11 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:32,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:32,446 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 228.0) internal successors, (2736), 12 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:32,446 INFO L186 Difference]: Start difference. First operand has 210 places, 214 transitions, 552 flow. Second operand 11 states and 1873 transitions. [2022-07-22 21:57:32,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 1018 flow [2022-07-22 21:57:32,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 286 transitions, 1013 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:57:32,454 INFO L242 Difference]: Finished difference. Result has 222 places, 200 transitions, 512 flow [2022-07-22 21:57:32,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=512, PETRI_PLACES=222, PETRI_TRANSITIONS=200} [2022-07-22 21:57:32,455 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 18 predicate places. [2022-07-22 21:57:32,455 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 200 transitions, 512 flow [2022-07-22 21:57:32,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.85714285714286) internal successors, (1140), 7 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:32,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:32,456 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:57:32,457 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)] === [2022-07-22 21:57:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1346727361, now seen corresponding path program 1 times [2022-07-22 21:57:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:32,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79450556] [2022-07-22 21:57:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:32,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:32,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:32,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79450556] [2022-07-22 21:57:32,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79450556] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639722525] [2022-07-22 21:57:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:32,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:32,615 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) [2022-07-22 21:57:32,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:57:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:57:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:33,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639722525] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:33,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:33,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:57:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719116304] [2022-07-22 21:57:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:33,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:57:33,307 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 228 [2022-07-22 21:57:33,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 200 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:33,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:33,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 228 [2022-07-22 21:57:33,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:33,625 INFO L129 PetriNetUnfolder]: 635/1510 cut-off events. [2022-07-22 21:57:33,625 INFO L130 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2022-07-22 21:57:33,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 1510 events. 635/1510 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8349 event pairs, 273 based on Foata normal form. 29/1312 useless extension candidates. Maximal degree in co-relation 2977. Up to 603 conditions per place. [2022-07-22 21:57:33,638 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 65 selfloop transitions, 7 changer transitions 0/211 dead transitions. [2022-07-22 21:57:33,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 211 transitions, 693 flow [2022-07-22 21:57:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:57:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:57:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1167 transitions. [2022-07-22 21:57:33,641 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.731203007518797 [2022-07-22 21:57:33,641 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1167 transitions. [2022-07-22 21:57:33,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1167 transitions. [2022-07-22 21:57:33,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:33,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1167 transitions. [2022-07-22 21:57:33,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 166.71428571428572) internal successors, (1167), 7 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:33,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:33,648 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:33,649 INFO L186 Difference]: Start difference. First operand has 222 places, 200 transitions, 512 flow. Second operand 7 states and 1167 transitions. [2022-07-22 21:57:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 211 transitions, 693 flow [2022-07-22 21:57:33,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 211 transitions, 620 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-07-22 21:57:33,655 INFO L242 Difference]: Finished difference. Result has 207 places, 202 transitions, 480 flow [2022-07-22 21:57:33,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2022-07-22 21:57:33,656 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 3 predicate places. [2022-07-22 21:57:33,656 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 480 flow [2022-07-22 21:57:33,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.14285714285714) internal successors, (1149), 7 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:33,657 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:33,657 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:33,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 21:57:33,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:33,872 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)] === [2022-07-22 21:57:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1301123104, now seen corresponding path program 1 times [2022-07-22 21:57:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:33,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829179043] [2022-07-22 21:57:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:33,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:33,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:33,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829179043] [2022-07-22 21:57:33,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829179043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:33,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149542699] [2022-07-22 21:57:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:33,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:33,984 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) [2022-07-22 21:57:33,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:57:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:57:34,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:34,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:34,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149542699] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:34,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:34,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:57:34,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403904748] [2022-07-22 21:57:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:34,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:57:34,554 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 228 [2022-07-22 21:57:34,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:34,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:34,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 228 [2022-07-22 21:57:34,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:34,764 INFO L129 PetriNetUnfolder]: 449/1048 cut-off events. [2022-07-22 21:57:34,765 INFO L130 PetriNetUnfolder]: For 356/469 co-relation queries the response was YES. [2022-07-22 21:57:34,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1048 events. 449/1048 cut-off events. For 356/469 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5197 event pairs, 121 based on Foata normal form. 113/961 useless extension candidates. Maximal degree in co-relation 2112. Up to 401 conditions per place. [2022-07-22 21:57:34,774 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 64 selfloop transitions, 7 changer transitions 0/212 dead transitions. [2022-07-22 21:57:34,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 212 transitions, 657 flow [2022-07-22 21:57:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:57:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:57:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1178 transitions. [2022-07-22 21:57:34,778 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2022-07-22 21:57:34,778 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1178 transitions. [2022-07-22 21:57:34,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1178 transitions. [2022-07-22 21:57:34,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:34,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1178 transitions. [2022-07-22 21:57:34,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 168.28571428571428) internal successors, (1178), 7 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:34,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:34,785 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:34,785 INFO L186 Difference]: Start difference. First operand has 207 places, 202 transitions, 480 flow. Second operand 7 states and 1178 transitions. [2022-07-22 21:57:34,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 212 transitions, 657 flow [2022-07-22 21:57:34,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 212 transitions, 648 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:57:34,792 INFO L242 Difference]: Finished difference. Result has 211 places, 203 transitions, 499 flow [2022-07-22 21:57:34,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=211, PETRI_TRANSITIONS=203} [2022-07-22 21:57:34,795 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 7 predicate places. [2022-07-22 21:57:34,795 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 203 transitions, 499 flow [2022-07-22 21:57:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.0) internal successors, (1162), 7 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:34,797 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:34,797 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:34,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:57:35,020 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)] === [2022-07-22 21:57:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 672073108, now seen corresponding path program 1 times [2022-07-22 21:57:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264824676] [2022-07-22 21:57:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:57:35,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:35,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264824676] [2022-07-22 21:57:35,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264824676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:35,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327386924] [2022-07-22 21:57:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:35,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:35,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:35,110 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) [2022-07-22 21:57:35,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:57:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:35,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:57:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:57:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:57:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:57:35,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327386924] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:35,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:57:35,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:57:35,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202340355] [2022-07-22 21:57:35,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:57:35,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:57:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:57:35,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:57:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:57:35,627 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 228 [2022-07-22 21:57:35,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 203 transitions, 499 flow. Second operand has 7 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:35,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:57:35,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 228 [2022-07-22 21:57:35,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:57:35,816 INFO L129 PetriNetUnfolder]: 440/1049 cut-off events. [2022-07-22 21:57:35,817 INFO L130 PetriNetUnfolder]: For 596/849 co-relation queries the response was YES. [2022-07-22 21:57:35,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 1049 events. 440/1049 cut-off events. For 596/849 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5218 event pairs, 109 based on Foata normal form. 253/1194 useless extension candidates. Maximal degree in co-relation 2220. Up to 415 conditions per place. [2022-07-22 21:57:35,826 INFO L132 encePairwiseOnDemand]: 220/228 looper letters, 66 selfloop transitions, 7 changer transitions 0/213 dead transitions. [2022-07-22 21:57:35,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 213 transitions, 682 flow [2022-07-22 21:57:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:57:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:57:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2022-07-22 21:57:35,830 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7343358395989975 [2022-07-22 21:57:35,830 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2022-07-22 21:57:35,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2022-07-22 21:57:35,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:57:35,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2022-07-22 21:57:35,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:35,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:35,838 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:35,838 INFO L186 Difference]: Start difference. First operand has 211 places, 203 transitions, 499 flow. Second operand 7 states and 1172 transitions. [2022-07-22 21:57:35,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 213 transitions, 682 flow [2022-07-22 21:57:35,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 213 transitions, 671 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:57:35,843 INFO L242 Difference]: Finished difference. Result has 214 places, 204 transitions, 516 flow [2022-07-22 21:57:35,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=214, PETRI_TRANSITIONS=204} [2022-07-22 21:57:35,845 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 10 predicate places. [2022-07-22 21:57:35,845 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 204 transitions, 516 flow [2022-07-22 21:57:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.28571428571428) internal successors, (1157), 7 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:57:35,846 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:57:35,846 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:57:35,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:57:36,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:36,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:57:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:57:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1599084967, now seen corresponding path program 1 times [2022-07-22 21:57:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:57:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678267438] [2022-07-22 21:57:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:57:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:57:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:57:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678267438] [2022-07-22 21:57:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678267438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:57:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812209086] [2022-07-22 21:57:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:57:37,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:57:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:57:37,443 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) [2022-07-22 21:57:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:57:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:57:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-22 21:57:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:57:38,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:57:38,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:57:39,161 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:57:39,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:57:39,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:57:39,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:57:39,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:57:39,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:57:40,103 INFO L356 Elim1Store]: treesize reduction 36, result has 54.4 percent of original size [2022-07-22 21:57:40,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 58 [2022-07-22 21:57:44,992 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:57:44,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 165 [2022-07-22 21:57:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:57:45,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:58:49,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 21:58:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:58:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812209086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:58:49,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:58:49,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 16] total 69 [2022-07-22 21:58:49,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243157123] [2022-07-22 21:58:49,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:58:49,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 21:58:49,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:58:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 21:58:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=4139, Unknown=14, NotChecked=0, Total=4692 [2022-07-22 21:58:49,792 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 228 [2022-07-22 21:58:49,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 204 transitions, 516 flow. Second operand has 69 states, 69 states have (on average 81.02898550724638) internal successors, (5591), 69 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:58:49,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:58:49,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 228 [2022-07-22 21:58:49,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:59:00,481 INFO L129 PetriNetUnfolder]: 10448/17154 cut-off events. [2022-07-22 21:59:00,481 INFO L130 PetriNetUnfolder]: For 11571/11571 co-relation queries the response was YES. [2022-07-22 21:59:00,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41800 conditions, 17154 events. 10448/17154 cut-off events. For 11571/11571 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 122586 event pairs, 488 based on Foata normal form. 1/16578 useless extension candidates. Maximal degree in co-relation 41786. Up to 6286 conditions per place. [2022-07-22 21:59:00,601 INFO L132 encePairwiseOnDemand]: 168/228 looper letters, 344 selfloop transitions, 136 changer transitions 4/553 dead transitions. [2022-07-22 21:59:00,602 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 553 transitions, 2650 flow [2022-07-22 21:59:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 21:59:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-22 21:59:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4650 transitions. [2022-07-22 21:59:00,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3708133971291866 [2022-07-22 21:59:00,615 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4650 transitions. [2022-07-22 21:59:00,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4650 transitions. [2022-07-22 21:59:00,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:59:00,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4650 transitions. [2022-07-22 21:59:00,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 84.54545454545455) internal successors, (4650), 55 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:00,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 228.0) internal successors, (12768), 56 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:00,664 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 228.0) internal successors, (12768), 56 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:00,664 INFO L186 Difference]: Start difference. First operand has 214 places, 204 transitions, 516 flow. Second operand 55 states and 4650 transitions. [2022-07-22 21:59:00,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 553 transitions, 2650 flow [2022-07-22 21:59:00,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 553 transitions, 2623 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:59:00,724 INFO L242 Difference]: Finished difference. Result has 282 places, 312 transitions, 1348 flow [2022-07-22 21:59:00,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1348, PETRI_PLACES=282, PETRI_TRANSITIONS=312} [2022-07-22 21:59:00,727 INFO L279 CegarLoopForPetriNet]: 204 programPoint places, 78 predicate places. [2022-07-22 21:59:00,727 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 312 transitions, 1348 flow [2022-07-22 21:59:00,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 81.02898550724638) internal successors, (5591), 69 states have internal predecessors, (5591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:59:00,730 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:59:00,730 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:59:00,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:59:00,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:00,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:59:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:59:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1725345177, now seen corresponding path program 2 times [2022-07-22 21:59:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:59:00,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045284442] [2022-07-22 21:59:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:59:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:59:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:59:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:59:02,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:59:02,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045284442] [2022-07-22 21:59:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045284442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:59:02,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644408313] [2022-07-22 21:59:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:59:02,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:59:02,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:59:02,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:59:02,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:59:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:59:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:59:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-22 21:59:02,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:59:02,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:59:03,127 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 21:59:03,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 21:59:03,554 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-22 21:59:03,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-07-22 21:59:04,016 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:59:04,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2022-07-22 21:59:04,810 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:59:04,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2022-07-22 21:59:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 21:59:04,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:59:05,318 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:59:05,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 606 treesize of output 542 [2022-07-22 21:59:05,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 354 treesize of output 346 [2022-07-22 21:59:05,633 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:59:05,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 755 treesize of output 547