./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:37:49,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:37:49,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:37:49,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:37:49,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:37:49,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:37:49,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:37:49,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:37:49,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:37:49,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:37:49,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:37:49,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:37:49,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:37:49,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:37:49,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:37:49,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:37:49,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:37:49,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:37:49,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:37:49,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:37:49,760 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:37:49,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:37:49,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:37:49,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:37:49,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:37:49,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:37:49,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:37:49,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:37:49,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:37:49,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:37:49,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:37:49,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:37:49,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:37:49,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:37:49,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:37:49,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:37:49,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:37:49,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:37:49,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:37:49,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:37:49,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:37:49,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:37:49,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:37:49,789 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:37:49,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:37:49,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:37:49,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:37:49,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:37:49,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:37:49,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:37:49,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:37:49,791 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:37:49,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:37:49,791 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:37:49,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:37:49,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:37:49,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:37:49,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:37:49,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:37:49,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:37:49,792 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:37:49,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:37:49,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:37:49,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:37:49,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:37:49,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:37:49,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:37:49,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:37:49,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:37:49,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:37:49,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-07-12 10:37:49,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:37:49,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:37:49,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:37:49,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:37:49,956 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:37:49,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-12 10:37:49,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb24f63b/4193fce9fc494f38ad6beb8fdcc4ad4b/FLAG96817a6fc [2022-07-12 10:37:50,368 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:37:50,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-07-12 10:37:50,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb24f63b/4193fce9fc494f38ad6beb8fdcc4ad4b/FLAG96817a6fc [2022-07-12 10:37:50,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb24f63b/4193fce9fc494f38ad6beb8fdcc4ad4b [2022-07-12 10:37:50,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:37:50,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:37:50,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:37:50,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:37:50,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:37:50,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed5f931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50, skipping insertion in model container [2022-07-12 10:37:50,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:37:50,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:37:50,540 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-mult-equiv.wvr.c[2591,2604] [2022-07-12 10:37:50,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:37:50,546 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:37:50,561 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-mult-equiv.wvr.c[2591,2604] [2022-07-12 10:37:50,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:37:50,570 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:37:50,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50 WrapperNode [2022-07-12 10:37:50,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:37:50,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:37:50,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:37:50,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:37:50,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,598 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-07-12 10:37:50,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:37:50,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:37:50,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:37:50,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:37:50,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:37:50,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:37:50,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:37:50,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:37:50,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (1/1) ... [2022-07-12 10:37:50,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:37:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:50,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:37:50,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:37:50,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:37:50,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:37:50,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:37:50,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:37:50,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:37:50,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:37:50,693 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:37:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:37:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:37:50,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:37:50,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:37:50,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:37:50,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:37:50,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:37:50,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:37:50,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:37:50,695 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:37:50,760 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:37:50,761 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:37:50,886 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:37:50,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:37:50,939 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:37:50,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:37:50 BoogieIcfgContainer [2022-07-12 10:37:50,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:37:50,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:37:50,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:37:50,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:37:50,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:37:50" (1/3) ... [2022-07-12 10:37:50,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be61c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:37:50, skipping insertion in model container [2022-07-12 10:37:50,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:37:50" (2/3) ... [2022-07-12 10:37:50,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be61c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:37:50, skipping insertion in model container [2022-07-12 10:37:50,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:37:50" (3/3) ... [2022-07-12 10:37:50,959 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-07-12 10:37:50,962 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:37:50,968 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:37:50,968 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:37:50,968 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:37:51,009 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:37:51,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-07-12 10:37:51,067 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2022-07-12 10:37:51,067 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:37:51,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-07-12 10:37:51,071 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-07-12 10:37:51,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-07-12 10:37:51,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:37:51,087 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@4be40716, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f258181 [2022-07-12 10:37:51,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:37:51,102 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2022-07-12 10:37:51,103 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:37:51,103 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:51,103 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:51,104 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)] === [2022-07-12 10:37:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1408875064, now seen corresponding path program 1 times [2022-07-12 10:37:51,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:51,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36014588] [2022-07-12 10:37:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:51,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:51,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:51,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36014588] [2022-07-12 10:37:51,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36014588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:51,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:37:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861136628] [2022-07-12 10:37:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:51,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:37:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:51,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:37:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:37:51,321 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-07-12 10:37:51,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:51,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-07-12 10:37:51,324 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:51,362 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2022-07-12 10:37:51,362 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-07-12 10:37:51,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 254 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-07-12 10:37:51,365 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-07-12 10:37:51,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-07-12 10:37:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:37:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:37:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-07-12 10:37:51,373 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-07-12 10:37:51,374 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-07-12 10:37:51,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-07-12 10:37:51,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:51,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-07-12 10:37:51,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,382 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,383 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-07-12 10:37:51,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-07-12 10:37:51,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:37:51,390 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-07-12 10:37:51,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-07-12 10:37:51,396 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-07-12 10:37:51,396 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-07-12 10:37:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:51,397 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:37:51,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:37:51,397 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)] === [2022-07-12 10:37:51,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-07-12 10:37:51,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:51,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705959987] [2022-07-12 10:37:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705959987] [2022-07-12 10:37:51,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705959987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:51,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:51,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:37:51,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996743706] [2022-07-12 10:37:51,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:51,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:37:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:37:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:37:51,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-07-12 10:37:51,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:51,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-07-12 10:37:51,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:51,763 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2022-07-12 10:37:51,763 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-07-12 10:37:51,764 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 483 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-07-12 10:37:51,765 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-07-12 10:37:51,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-07-12 10:37:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:37:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:37:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-07-12 10:37:51,768 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-07-12 10:37:51,768 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-07-12 10:37:51,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-07-12 10:37:51,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:51,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-07-12 10:37:51,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,773 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-07-12 10:37:51,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-07-12 10:37:51,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:37:51,775 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-07-12 10:37:51,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-07-12 10:37:51,776 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-07-12 10:37:51,776 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-07-12 10:37:51,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:51,777 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:51,777 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] [2022-07-12 10:37:51,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:37:51,777 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)] === [2022-07-12 10:37:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:51,778 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-07-12 10:37:51,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:51,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898210362] [2022-07-12 10:37:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:51,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:52,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898210362] [2022-07-12 10:37:52,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898210362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:52,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:52,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:37:52,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901051738] [2022-07-12 10:37:52,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:52,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:37:52,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:37:52,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:37:52,067 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:37:52,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:52,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:37:52,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:52,331 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2022-07-12 10:37:52,332 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-07-12 10:37:52,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4076 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-07-12 10:37:52,339 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-07-12 10:37:52,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-07-12 10:37:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:37:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:37:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-07-12 10:37:52,343 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-07-12 10:37:52,344 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-07-12 10:37:52,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-07-12 10:37:52,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:52,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-07-12 10:37:52,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,349 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,349 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-07-12 10:37:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-07-12 10:37:52,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-12 10:37:52,357 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-07-12 10:37:52,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-07-12 10:37:52,359 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-07-12 10:37:52,359 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-07-12 10:37:52,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,359 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:52,359 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] [2022-07-12 10:37:52,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:37:52,360 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)] === [2022-07-12 10:37:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1580608891, now seen corresponding path program 2 times [2022-07-12 10:37:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97093873] [2022-07-12 10:37:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:52,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97093873] [2022-07-12 10:37:52,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97093873] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:52,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:52,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:37:52,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957002966] [2022-07-12 10:37:52,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:52,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:37:52,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:37:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:37:52,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:37:52,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:52,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:37:52,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:52,651 INFO L129 PetriNetUnfolder]: 371/890 cut-off events. [2022-07-12 10:37:52,652 INFO L130 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-07-12 10:37:52,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4794 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-07-12 10:37:52,658 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-07-12 10:37:52,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-07-12 10:37:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:37:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:37:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-07-12 10:37:52,660 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-12 10:37:52,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-07-12 10:37:52,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-07-12 10:37:52,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:52,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-07-12 10:37:52,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,665 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,666 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-07-12 10:37:52,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-07-12 10:37:52,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:37:52,672 INFO L242 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-07-12 10:37:52,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-07-12 10:37:52,676 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-07-12 10:37:52,677 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-07-12 10:37:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,677 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:52,677 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] [2022-07-12 10:37:52,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:37:52,677 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)] === [2022-07-12 10:37:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash -599492455, now seen corresponding path program 3 times [2022-07-12 10:37:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545522694] [2022-07-12 10:37:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:52,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545522694] [2022-07-12 10:37:52,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545522694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:52,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:52,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:37:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676462452] [2022-07-12 10:37:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:37:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:37:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:37:52,834 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:37:52,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:52,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:52,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:37:52,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:53,131 INFO L129 PetriNetUnfolder]: 576/1349 cut-off events. [2022-07-12 10:37:53,131 INFO L130 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-07-12 10:37:53,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8232 event pairs, 89 based on Foata normal form. 19/1297 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-07-12 10:37:53,140 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-07-12 10:37:53,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-07-12 10:37:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:37:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:37:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-07-12 10:37:53,143 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-07-12 10:37:53,143 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-07-12 10:37:53,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-07-12 10:37:53,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:53,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-07-12 10:37:53,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,147 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,147 INFO L186 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-07-12 10:37:53,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-07-12 10:37:53,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-12 10:37:53,154 INFO L242 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-07-12 10:37:53,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-07-12 10:37:53,156 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-07-12 10:37:53,156 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-07-12 10:37:53,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,157 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:53,157 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] [2022-07-12 10:37:53,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:37:53,157 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)] === [2022-07-12 10:37:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1430121317, now seen corresponding path program 4 times [2022-07-12 10:37:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:53,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771646700] [2022-07-12 10:37:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771646700] [2022-07-12 10:37:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771646700] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:53,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:53,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:37:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063420046] [2022-07-12 10:37:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:37:53,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:37:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:37:53,270 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:37:53,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:53,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:37:53,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:53,449 INFO L129 PetriNetUnfolder]: 594/1403 cut-off events. [2022-07-12 10:37:53,449 INFO L130 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-07-12 10:37:53,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8721 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-07-12 10:37:53,459 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-07-12 10:37:53,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-07-12 10:37:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:37:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:37:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-07-12 10:37:53,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-07-12 10:37:53,462 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-07-12 10:37:53,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-07-12 10:37:53,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:53,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-07-12 10:37:53,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,492 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,492 INFO L186 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-07-12 10:37:53,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-07-12 10:37:53,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-12 10:37:53,501 INFO L242 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-07-12 10:37:53,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-07-12 10:37:53,503 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-07-12 10:37:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-07-12 10:37:53,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:53,505 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] [2022-07-12 10:37:53,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:37:53,505 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)] === [2022-07-12 10:37:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash -829555728, now seen corresponding path program 1 times [2022-07-12 10:37:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:53,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710315344] [2022-07-12 10:37:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:53,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:53,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710315344] [2022-07-12 10:37:53,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710315344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:53,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:53,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:37:53,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030056344] [2022-07-12 10:37:53,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:53,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:37:53,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:37:53,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:37:53,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:37:53,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:53,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:37:53,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:53,833 INFO L129 PetriNetUnfolder]: 671/1538 cut-off events. [2022-07-12 10:37:53,833 INFO L130 PetriNetUnfolder]: For 3129/3163 co-relation queries the response was YES. [2022-07-12 10:37:53,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4709 conditions, 1538 events. 671/1538 cut-off events. For 3129/3163 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9727 event pairs, 131 based on Foata normal form. 28/1481 useless extension candidates. Maximal degree in co-relation 4684. Up to 579 conditions per place. [2022-07-12 10:37:53,873 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-07-12 10:37:53,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-07-12 10:37:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:37:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:37:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-07-12 10:37:53,875 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-07-12 10:37:53,875 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-07-12 10:37:53,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-07-12 10:37:53,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:53,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-07-12 10:37:53,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,878 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,878 INFO L186 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-07-12 10:37:53,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-07-12 10:37:53,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-12 10:37:53,888 INFO L242 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-07-12 10:37:53,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-07-12 10:37:53,889 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-07-12 10:37:53,889 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-07-12 10:37:53,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:53,890 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:53,890 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] [2022-07-12 10:37:53,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:37:53,890 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)] === [2022-07-12 10:37:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1761321142, now seen corresponding path program 2 times [2022-07-12 10:37:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:53,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74501066] [2022-07-12 10:37:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:53,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:54,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74501066] [2022-07-12 10:37:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74501066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:54,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:54,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:37:54,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62141594] [2022-07-12 10:37:54,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:54,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:37:54,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:37:54,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:37:54,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-12 10:37:54,131 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:54,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:54,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-12 10:37:54,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:54,729 INFO L129 PetriNetUnfolder]: 1609/3278 cut-off events. [2022-07-12 10:37:54,729 INFO L130 PetriNetUnfolder]: For 9722/9800 co-relation queries the response was YES. [2022-07-12 10:37:54,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 3278 events. 1609/3278 cut-off events. For 9722/9800 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23364 event pairs, 512 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 11470. Up to 1864 conditions per place. [2022-07-12 10:37:54,756 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 114 selfloop transitions, 60 changer transitions 6/235 dead transitions. [2022-07-12 10:37:54,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2127 flow [2022-07-12 10:37:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:37:54,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:37:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 722 transitions. [2022-07-12 10:37:54,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.827033218785796 [2022-07-12 10:37:54,759 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 722 transitions. [2022-07-12 10:37:54,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 722 transitions. [2022-07-12 10:37:54,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:54,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 722 transitions. [2022-07-12 10:37:54,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.22222222222223) internal successors, (722), 9 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:54,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:54,762 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:54,763 INFO L186 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 9 states and 722 transitions. [2022-07-12 10:37:54,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2127 flow [2022-07-12 10:37:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 235 transitions, 2076 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-12 10:37:54,786 INFO L242 Difference]: Finished difference. Result has 142 places, 168 transitions, 1575 flow [2022-07-12 10:37:54,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2022-07-12 10:37:54,787 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 56 predicate places. [2022-07-12 10:37:54,788 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1575 flow [2022-07-12 10:37:54,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.25) internal successors, (570), 8 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:54,788 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:54,788 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] [2022-07-12 10:37:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:37:54,789 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)] === [2022-07-12 10:37:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash 133163824, now seen corresponding path program 1 times [2022-07-12 10:37:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:54,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812371742] [2022-07-12 10:37:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:54,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812371742] [2022-07-12 10:37:54,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812371742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:54,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:54,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:37:54,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298372817] [2022-07-12 10:37:54,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:54,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:37:54,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:54,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:37:54,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:37:54,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-12 10:37:54,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:54,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:54,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-12 10:37:54,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:55,277 INFO L129 PetriNetUnfolder]: 1323/3152 cut-off events. [2022-07-12 10:37:55,278 INFO L130 PetriNetUnfolder]: For 11002/11304 co-relation queries the response was YES. [2022-07-12 10:37:55,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11658 conditions, 3152 events. 1323/3152 cut-off events. For 11002/11304 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25036 event pairs, 262 based on Foata normal form. 96/3141 useless extension candidates. Maximal degree in co-relation 11623. Up to 1104 conditions per place. [2022-07-12 10:37:55,307 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 64 selfloop transitions, 65 changer transitions 2/200 dead transitions. [2022-07-12 10:37:55,307 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 1998 flow [2022-07-12 10:37:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:37:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:37:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-12 10:37:55,311 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-12 10:37:55,312 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-12 10:37:55,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-12 10:37:55,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:55,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-12 10:37:55,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,314 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,314 INFO L186 Difference]: Start difference. First operand has 142 places, 168 transitions, 1575 flow. Second operand 6 states and 486 transitions. [2022-07-12 10:37:55,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 1998 flow [2022-07-12 10:37:55,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 1946 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-12 10:37:55,352 INFO L242 Difference]: Finished difference. Result has 147 places, 173 transitions, 1774 flow [2022-07-12 10:37:55,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1774, PETRI_PLACES=147, PETRI_TRANSITIONS=173} [2022-07-12 10:37:55,353 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-07-12 10:37:55,353 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 173 transitions, 1774 flow [2022-07-12 10:37:55,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,353 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:55,353 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] [2022-07-12 10:37:55,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:37:55,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:37:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash -695560766, now seen corresponding path program 2 times [2022-07-12 10:37:55,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:55,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902197663] [2022-07-12 10:37:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:55,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:55,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:55,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902197663] [2022-07-12 10:37:55,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902197663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:55,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:55,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:37:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571589197] [2022-07-12 10:37:55,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:55,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:37:55,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:37:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:37:55,430 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-12 10:37:55,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 173 transitions, 1774 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,431 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:55,431 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-12 10:37:55,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:55,719 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][177], [Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 225#true, 106#true, Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 150#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 238#true]) [2022-07-12 10:37:55,719 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-12 10:37:55,720 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-12 10:37:55,720 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-12 10:37:55,720 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-12 10:37:55,894 INFO L129 PetriNetUnfolder]: 1649/3706 cut-off events. [2022-07-12 10:37:55,895 INFO L130 PetriNetUnfolder]: For 18241/18640 co-relation queries the response was YES. [2022-07-12 10:37:55,909 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15719 conditions, 3706 events. 1649/3706 cut-off events. For 18241/18640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 29394 event pairs, 179 based on Foata normal form. 127/3712 useless extension candidates. Maximal degree in co-relation 15682. Up to 1319 conditions per place. [2022-07-12 10:37:55,933 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 123 selfloop transitions, 105 changer transitions 2/299 dead transitions. [2022-07-12 10:37:55,934 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 299 transitions, 3896 flow [2022-07-12 10:37:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:37:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:37:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-07-12 10:37:55,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-07-12 10:37:55,936 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-07-12 10:37:55,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-07-12 10:37:55,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:55,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-07-12 10:37:55,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,938 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,938 INFO L186 Difference]: Start difference. First operand has 147 places, 173 transitions, 1774 flow. Second operand 6 states and 491 transitions. [2022-07-12 10:37:55,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 299 transitions, 3896 flow [2022-07-12 10:37:55,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 299 transitions, 3726 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-07-12 10:37:55,992 INFO L242 Difference]: Finished difference. Result has 154 places, 232 transitions, 2918 flow [2022-07-12 10:37:55,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2918, PETRI_PLACES=154, PETRI_TRANSITIONS=232} [2022-07-12 10:37:55,993 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2022-07-12 10:37:55,994 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 232 transitions, 2918 flow [2022-07-12 10:37:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:55,994 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:55,994 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] [2022-07-12 10:37:55,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:37:55,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:37:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash 140530238, now seen corresponding path program 3 times [2022-07-12 10:37:55,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:55,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869254071] [2022-07-12 10:37:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:55,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:56,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:56,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869254071] [2022-07-12 10:37:56,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869254071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:56,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:56,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:37:56,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005751518] [2022-07-12 10:37:56,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:56,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:37:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:37:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:37:56,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:37:56,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 232 transitions, 2918 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:56,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:56,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:37:56,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:56,573 INFO L129 PetriNetUnfolder]: 1623/3657 cut-off events. [2022-07-12 10:37:56,574 INFO L130 PetriNetUnfolder]: For 20724/20780 co-relation queries the response was YES. [2022-07-12 10:37:56,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 3657 events. 1623/3657 cut-off events. For 20724/20780 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 28431 event pairs, 389 based on Foata normal form. 14/3562 useless extension candidates. Maximal degree in co-relation 16850. Up to 2302 conditions per place. [2022-07-12 10:37:56,686 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 121 selfloop transitions, 71 changer transitions 1/253 dead transitions. [2022-07-12 10:37:56,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 3482 flow [2022-07-12 10:37:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:37:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:37:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-07-12 10:37:56,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-12 10:37:56,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-07-12 10:37:56,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-07-12 10:37:56,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:56,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-07-12 10:37:56,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:56,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:56,691 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:56,691 INFO L186 Difference]: Start difference. First operand has 154 places, 232 transitions, 2918 flow. Second operand 5 states and 405 transitions. [2022-07-12 10:37:56,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 3482 flow [2022-07-12 10:37:56,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 253 transitions, 3448 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-07-12 10:37:56,771 INFO L242 Difference]: Finished difference. Result has 160 places, 235 transitions, 3178 flow [2022-07-12 10:37:56,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3178, PETRI_PLACES=160, PETRI_TRANSITIONS=235} [2022-07-12 10:37:56,772 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2022-07-12 10:37:56,772 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 235 transitions, 3178 flow [2022-07-12 10:37:56,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:56,772 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:56,772 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] [2022-07-12 10:37:56,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:37:56,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:37:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash 540547268, now seen corresponding path program 3 times [2022-07-12 10:37:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:56,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210035089] [2022-07-12 10:37:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:56,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210035089] [2022-07-12 10:37:56,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210035089] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:56,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:56,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:37:56,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754126126] [2022-07-12 10:37:56,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:56,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:37:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:37:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:37:56,860 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-12 10:37:56,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 235 transitions, 3178 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:56,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:56,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-12 10:37:56,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:57,178 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~q~0_14 v_~M~0_20))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][179], [Black: 190#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 122#(or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 260#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 192#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 123#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 131#(and (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 257#(and (= ~N~0 ~L~0) (or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 187#(= (+ ~N~0 (* (- 1) ~L~0)) 0), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= (+ ~N~0 (* (- 1) ~L~0)) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296))))), Black: 127#(and (= ~N~0 ~L~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 140#(= (+ ~N~0 (* (- 1) ~L~0)) 0), 106#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (= ~N~0 ~L~0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 185#true, Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 67#L99-4true, 7#L83true, 103#true, Black: 211#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0)))), Black: 213#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 207#(and (<= 1 thread2Thread1of1ForFork1_~cond~1) (<= (div thread2Thread1of1ForFork1_~cond~1 256) 0)), 264#true, Black: 215#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0) (or (and (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)) (and (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1)) (= thread2Thread1of1ForFork1_~cond~1 0))) (or (< (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 217#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (= thread2Thread1of1ForFork1_~cond~1 1)), 120#true, Black: 209#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), 83#L64true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 157#(and (or (and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0))) (= ~N~0 ~L~0)), Black: 159#(and (= ~N~0 ~L~0) (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 163#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), 6#L46-1true, Black: 150#true, 254#true, Black: 227#(or (and (= (+ (* (- 1) thread1Thread1of1ForFork0_~cond~0) 1) 0) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))) (and (= (* (- 1) thread1Thread1of1ForFork0_~cond~0) 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 231#(and (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 233#(and (= thread2Thread1of1ForFork1_~cond~1 0) (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)) (= thread1Thread1of1ForFork0_~cond~0 0)), Black: 175#(<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0), Black: 180#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= (+ (* (div ~N~0 4294967296) 4294967296) 1) ~N~0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 176#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 240#(or (and (= (* (- 1) thread2Thread1of1ForFork1_~cond~1) 0) (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))) (and (= (+ (* (- 1) thread2Thread1of1ForFork1_~cond~1) 1) 0) (not (<= ~N~0 (+ (* (div ~N~0 4294967296) 4294967296) 1))))), 238#true, Black: 244#(and (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1)), Black: 242#(and (= thread1Thread1of1ForFork0_~cond~0 1) (not (<= ~N~0 (* (div ~N~0 4294967296) 4294967296)))), Black: 246#(and (= thread1Thread1of1ForFork0_~cond~0 1) (<= (+ 2 (* (div ~N~0 4294967296) 4294967296)) ~N~0) (= thread2Thread1of1ForFork1_~cond~1 1))]) [2022-07-12 10:37:57,178 INFO L384 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2022-07-12 10:37:57,178 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-12 10:37:57,178 INFO L387 tUnfolder$Statistics]: existing Event has 48 ancestors and is cut-off event [2022-07-12 10:37:57,179 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2022-07-12 10:37:57,339 INFO L129 PetriNetUnfolder]: 1860/4309 cut-off events. [2022-07-12 10:37:57,339 INFO L130 PetriNetUnfolder]: For 24798/25309 co-relation queries the response was YES. [2022-07-12 10:37:57,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19625 conditions, 4309 events. 1860/4309 cut-off events. For 24798/25309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36049 event pairs, 229 based on Foata normal form. 143/4307 useless extension candidates. Maximal degree in co-relation 19581. Up to 1429 conditions per place. [2022-07-12 10:37:57,377 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 95 selfloop transitions, 131 changer transitions 3/298 dead transitions. [2022-07-12 10:37:57,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 298 transitions, 4405 flow [2022-07-12 10:37:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:37:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:37:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2022-07-12 10:37:57,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2022-07-12 10:37:57,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2022-07-12 10:37:57,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2022-07-12 10:37:57,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:57,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2022-07-12 10:37:57,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:57,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:57,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:57,381 INFO L186 Difference]: Start difference. First operand has 160 places, 235 transitions, 3178 flow. Second operand 5 states and 414 transitions. [2022-07-12 10:37:57,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 298 transitions, 4405 flow [2022-07-12 10:37:57,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 298 transitions, 4325 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-07-12 10:37:57,491 INFO L242 Difference]: Finished difference. Result has 166 places, 266 transitions, 4115 flow [2022-07-12 10:37:57,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4115, PETRI_PLACES=166, PETRI_TRANSITIONS=266} [2022-07-12 10:37:57,492 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2022-07-12 10:37:57,492 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 266 transitions, 4115 flow [2022-07-12 10:37:57,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:57,493 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:57,493 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] [2022-07-12 10:37:57,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:37:57,493 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:37:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:57,494 INFO L85 PathProgramCache]: Analyzing trace with hash -346743856, now seen corresponding path program 4 times [2022-07-12 10:37:57,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705484579] [2022-07-12 10:37:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:57,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:57,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705484579] [2022-07-12 10:37:57,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705484579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:37:57,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:37:57,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:37:57,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69776933] [2022-07-12 10:37:57,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:57,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:37:57,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:37:57,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:37:57,591 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-12 10:37:57,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 266 transitions, 4115 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:57,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:57,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-12 10:37:57,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:37:58,342 INFO L129 PetriNetUnfolder]: 1950/4789 cut-off events. [2022-07-12 10:37:58,342 INFO L130 PetriNetUnfolder]: For 35999/36593 co-relation queries the response was YES. [2022-07-12 10:37:58,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 4789 events. 1950/4789 cut-off events. For 35999/36593 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42268 event pairs, 237 based on Foata normal form. 151/4795 useless extension candidates. Maximal degree in co-relation 22859. Up to 1635 conditions per place. [2022-07-12 10:37:58,380 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 84 selfloop transitions, 167 changer transitions 9/329 dead transitions. [2022-07-12 10:37:58,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 329 transitions, 5409 flow [2022-07-12 10:37:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:37:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:37:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2022-07-12 10:37:58,382 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8505154639175257 [2022-07-12 10:37:58,382 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2022-07-12 10:37:58,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2022-07-12 10:37:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:37:58,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2022-07-12 10:37:58,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.5) internal successors, (495), 6 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:58,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:58,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:58,385 INFO L186 Difference]: Start difference. First operand has 166 places, 266 transitions, 4115 flow. Second operand 6 states and 495 transitions. [2022-07-12 10:37:58,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 329 transitions, 5409 flow [2022-07-12 10:37:58,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 329 transitions, 5381 flow, removed 14 selfloop flow, removed 0 redundant places. [2022-07-12 10:37:58,471 INFO L242 Difference]: Finished difference. Result has 174 places, 286 transitions, 4936 flow [2022-07-12 10:37:58,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4936, PETRI_PLACES=174, PETRI_TRANSITIONS=286} [2022-07-12 10:37:58,471 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-07-12 10:37:58,472 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 286 transitions, 4936 flow [2022-07-12 10:37:58,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:58,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:37:58,472 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] [2022-07-12 10:37:58,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:37:58,472 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:37:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:37:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1395758734, now seen corresponding path program 5 times [2022-07-12 10:37:58,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:37:58,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920509265] [2022-07-12 10:37:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:37:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:37:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:37:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:58,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:37:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920509265] [2022-07-12 10:37:58,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920509265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:58,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350326418] [2022-07-12 10:37:58,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:37:58,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:37:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:37:58,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:37:58,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:37:58,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:37:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:37:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 10:37:58,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:37:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:37:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:37:59,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350326418] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:37:59,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:37:59,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-12 10:37:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082053269] [2022-07-12 10:37:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:37:59,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:37:59,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:37:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:37:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:37:59,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-12 10:37:59,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 286 transitions, 4936 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:37:59,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:37:59,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-12 10:37:59,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:00,265 INFO L129 PetriNetUnfolder]: 3895/9307 cut-off events. [2022-07-12 10:38:00,265 INFO L130 PetriNetUnfolder]: For 81067/81102 co-relation queries the response was YES. [2022-07-12 10:38:00,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46008 conditions, 9307 events. 3895/9307 cut-off events. For 81067/81102 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 89826 event pairs, 453 based on Foata normal form. 34/9161 useless extension candidates. Maximal degree in co-relation 45957. Up to 1710 conditions per place. [2022-07-12 10:38:00,381 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 388 selfloop transitions, 167 changer transitions 4/614 dead transitions. [2022-07-12 10:38:00,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 614 transitions, 11347 flow [2022-07-12 10:38:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:38:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:38:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-07-12 10:38:00,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-07-12 10:38:00,383 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-07-12 10:38:00,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-07-12 10:38:00,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:00,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-07-12 10:38:00,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,386 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,386 INFO L186 Difference]: Start difference. First operand has 174 places, 286 transitions, 4936 flow. Second operand 7 states and 573 transitions. [2022-07-12 10:38:00,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 614 transitions, 11347 flow [2022-07-12 10:38:00,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 614 transitions, 11207 flow, removed 70 selfloop flow, removed 0 redundant places. [2022-07-12 10:38:00,720 INFO L242 Difference]: Finished difference. Result has 185 places, 413 transitions, 7730 flow [2022-07-12 10:38:00,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7730, PETRI_PLACES=185, PETRI_TRANSITIONS=413} [2022-07-12 10:38:00,721 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 99 predicate places. [2022-07-12 10:38:00,721 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 413 transitions, 7730 flow [2022-07-12 10:38:00,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:00,735 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:00,735 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] [2022-07-12 10:38:00,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:38:00,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 10:38:00,952 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash 559220224, now seen corresponding path program 6 times [2022-07-12 10:38:00,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:00,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971053742] [2022-07-12 10:38:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:00,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:01,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971053742] [2022-07-12 10:38:01,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971053742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:01,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107349278] [2022-07-12 10:38:01,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:38:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:01,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:01,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:01,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:38:01,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:38:01,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:38:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:01,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107349278] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:01,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:38:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-07-12 10:38:01,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178095754] [2022-07-12 10:38:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:01,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:38:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:38:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-12 10:38:01,525 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-12 10:38:01,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 413 transitions, 7730 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:01,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:01,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-12 10:38:01,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:03,102 INFO L129 PetriNetUnfolder]: 4074/9522 cut-off events. [2022-07-12 10:38:03,102 INFO L130 PetriNetUnfolder]: For 106901/106901 co-relation queries the response was YES. [2022-07-12 10:38:03,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54464 conditions, 9522 events. 4074/9522 cut-off events. For 106901/106901 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 91322 event pairs, 499 based on Foata normal form. 6/9409 useless extension candidates. Maximal degree in co-relation 54408. Up to 2947 conditions per place. [2022-07-12 10:38:03,198 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 219 changer transitions 4/574 dead transitions. [2022-07-12 10:38:03,198 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 574 transitions, 11140 flow [2022-07-12 10:38:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:38:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:38:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-07-12 10:38:03,199 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-07-12 10:38:03,200 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-07-12 10:38:03,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-07-12 10:38:03,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:03,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-07-12 10:38:03,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:03,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:03,202 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:03,202 INFO L186 Difference]: Start difference. First operand has 185 places, 413 transitions, 7730 flow. Second operand 7 states and 570 transitions. [2022-07-12 10:38:03,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 574 transitions, 11140 flow [2022-07-12 10:38:03,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 574 transitions, 11033 flow, removed 47 selfloop flow, removed 1 redundant places. [2022-07-12 10:38:03,608 INFO L242 Difference]: Finished difference. Result has 196 places, 449 transitions, 9123 flow [2022-07-12 10:38:03,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7637, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9123, PETRI_PLACES=196, PETRI_TRANSITIONS=449} [2022-07-12 10:38:03,609 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-07-12 10:38:03,609 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 449 transitions, 9123 flow [2022-07-12 10:38:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:03,610 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:03,610 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] [2022-07-12 10:38:03,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:03,823 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,SelfDestructingSolverStorable14 [2022-07-12 10:38:03,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash 656605838, now seen corresponding path program 7 times [2022-07-12 10:38:03,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:03,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862851433] [2022-07-12 10:38:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862851433] [2022-07-12 10:38:03,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862851433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:03,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:03,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:38:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054329760] [2022-07-12 10:38:03,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:03,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:38:03,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:03,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:38:03,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:38:03,909 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-07-12 10:38:03,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 449 transitions, 9123 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:03,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:03,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-07-12 10:38:03,909 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:05,598 INFO L129 PetriNetUnfolder]: 3464/8894 cut-off events. [2022-07-12 10:38:05,599 INFO L130 PetriNetUnfolder]: For 135480/136714 co-relation queries the response was YES. [2022-07-12 10:38:05,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55488 conditions, 8894 events. 3464/8894 cut-off events. For 135480/136714 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 89611 event pairs, 465 based on Foata normal form. 311/8947 useless extension candidates. Maximal degree in co-relation 55427. Up to 1740 conditions per place. [2022-07-12 10:38:05,713 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 150 selfloop transitions, 370 changer transitions 3/609 dead transitions. [2022-07-12 10:38:05,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 609 transitions, 13216 flow [2022-07-12 10:38:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:38:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:38:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2022-07-12 10:38:05,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8625429553264605 [2022-07-12 10:38:05,738 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2022-07-12 10:38:05,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2022-07-12 10:38:05,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:05,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2022-07-12 10:38:05,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:05,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:05,742 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:05,742 INFO L186 Difference]: Start difference. First operand has 196 places, 449 transitions, 9123 flow. Second operand 6 states and 502 transitions. [2022-07-12 10:38:05,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 609 transitions, 13216 flow [2022-07-12 10:38:05,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 609 transitions, 13148 flow, removed 34 selfloop flow, removed 0 redundant places. [2022-07-12 10:38:05,990 INFO L242 Difference]: Finished difference. Result has 205 places, 548 transitions, 12794 flow [2022-07-12 10:38:05,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9059, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12794, PETRI_PLACES=205, PETRI_TRANSITIONS=548} [2022-07-12 10:38:05,991 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 119 predicate places. [2022-07-12 10:38:05,991 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 548 transitions, 12794 flow [2022-07-12 10:38:05,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:05,992 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:05,992 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] [2022-07-12 10:38:05,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:38:05,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1072745922, now seen corresponding path program 4 times [2022-07-12 10:38:05,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:05,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423660050] [2022-07-12 10:38:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:06,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:06,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423660050] [2022-07-12 10:38:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423660050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:06,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:06,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:38:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133198742] [2022-07-12 10:38:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:06,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:38:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:38:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:38:06,047 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:38:06,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 548 transitions, 12794 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:06,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:06,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:38:06,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:07,817 INFO L129 PetriNetUnfolder]: 3909/9528 cut-off events. [2022-07-12 10:38:07,817 INFO L130 PetriNetUnfolder]: For 170244/170512 co-relation queries the response was YES. [2022-07-12 10:38:07,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63320 conditions, 9528 events. 3909/9528 cut-off events. For 170244/170512 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 93113 event pairs, 976 based on Foata normal form. 37/9292 useless extension candidates. Maximal degree in co-relation 63254. Up to 5688 conditions per place. [2022-07-12 10:38:07,918 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 436 selfloop transitions, 66 changer transitions 8/584 dead transitions. [2022-07-12 10:38:07,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 584 transitions, 14251 flow [2022-07-12 10:38:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:38:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:38:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-07-12 10:38:07,920 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-07-12 10:38:07,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-07-12 10:38:07,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-07-12 10:38:07,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:07,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-07-12 10:38:07,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:07,923 INFO L186 Difference]: Start difference. First operand has 205 places, 548 transitions, 12794 flow. Second operand 6 states and 476 transitions. [2022-07-12 10:38:07,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 584 transitions, 14251 flow [2022-07-12 10:38:08,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 584 transitions, 14215 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-07-12 10:38:08,303 INFO L242 Difference]: Finished difference. Result has 212 places, 541 transitions, 12699 flow [2022-07-12 10:38:08,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12418, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12699, PETRI_PLACES=212, PETRI_TRANSITIONS=541} [2022-07-12 10:38:08,304 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 126 predicate places. [2022-07-12 10:38:08,304 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 541 transitions, 12699 flow [2022-07-12 10:38:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:08,304 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:08,304 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:38:08,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:38:08,304 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:08,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1416644298, now seen corresponding path program 8 times [2022-07-12 10:38:08,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:08,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946596496] [2022-07-12 10:38:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:08,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:08,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946596496] [2022-07-12 10:38:08,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946596496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591037248] [2022-07-12 10:38:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:08,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:08,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:08,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:38:08,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:08,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 10:38:08,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:08,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:09,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591037248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:09,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:09,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-07-12 10:38:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279989788] [2022-07-12 10:38:09,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:09,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:38:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:38:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:38:09,077 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-12 10:38:09,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 541 transitions, 12699 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:09,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:09,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-12 10:38:09,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:13,907 INFO L129 PetriNetUnfolder]: 7811/19000 cut-off events. [2022-07-12 10:38:13,907 INFO L130 PetriNetUnfolder]: For 303313/304046 co-relation queries the response was YES. [2022-07-12 10:38:14,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118832 conditions, 19000 events. 7811/19000 cut-off events. For 303313/304046 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 210815 event pairs, 1006 based on Foata normal form. 473/19077 useless extension candidates. Maximal degree in co-relation 118762. Up to 4772 conditions per place. [2022-07-12 10:38:14,151 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 783 selfloop transitions, 280 changer transitions 21/1170 dead transitions. [2022-07-12 10:38:14,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1170 transitions, 28289 flow [2022-07-12 10:38:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 10:38:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-12 10:38:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2022-07-12 10:38:14,153 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2022-07-12 10:38:14,153 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2022-07-12 10:38:14,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2022-07-12 10:38:14,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:14,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2022-07-12 10:38:14,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,157 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,157 INFO L186 Difference]: Start difference. First operand has 212 places, 541 transitions, 12699 flow. Second operand 15 states and 1097 transitions. [2022-07-12 10:38:14,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1170 transitions, 28289 flow [2022-07-12 10:38:14,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1170 transitions, 28213 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-12 10:38:14,942 INFO L242 Difference]: Finished difference. Result has 236 places, 711 transitions, 17313 flow [2022-07-12 10:38:14,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=12577, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17313, PETRI_PLACES=236, PETRI_TRANSITIONS=711} [2022-07-12 10:38:14,943 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-12 10:38:14,943 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 711 transitions, 17313 flow [2022-07-12 10:38:14,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:14,944 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:14,944 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] [2022-07-12 10:38:14,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 10:38:15,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:38:15,160 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 846898254, now seen corresponding path program 9 times [2022-07-12 10:38:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:15,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444810708] [2022-07-12 10:38:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:15,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:15,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444810708] [2022-07-12 10:38:15,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444810708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:15,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:15,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:38:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382417661] [2022-07-12 10:38:15,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:15,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:38:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:38:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:38:15,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:38:15,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 711 transitions, 17313 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:15,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:15,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:38:15,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:19,733 INFO L129 PetriNetUnfolder]: 7695/18660 cut-off events. [2022-07-12 10:38:19,734 INFO L130 PetriNetUnfolder]: For 363847/364686 co-relation queries the response was YES. [2022-07-12 10:38:19,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129115 conditions, 18660 events. 7695/18660 cut-off events. For 363847/364686 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206916 event pairs, 2046 based on Foata normal form. 194/18371 useless extension candidates. Maximal degree in co-relation 129034. Up to 11820 conditions per place. [2022-07-12 10:38:20,035 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 566 selfloop transitions, 73 changer transitions 9/740 dead transitions. [2022-07-12 10:38:20,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 740 transitions, 18968 flow [2022-07-12 10:38:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:38:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:38:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2022-07-12 10:38:20,037 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8161512027491409 [2022-07-12 10:38:20,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2022-07-12 10:38:20,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2022-07-12 10:38:20,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:20,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2022-07-12 10:38:20,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:20,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:20,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:20,042 INFO L186 Difference]: Start difference. First operand has 236 places, 711 transitions, 17313 flow. Second operand 6 states and 475 transitions. [2022-07-12 10:38:20,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 740 transitions, 18968 flow [2022-07-12 10:38:21,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 740 transitions, 18783 flow, removed 58 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:21,249 INFO L242 Difference]: Finished difference. Result has 237 places, 715 transitions, 17401 flow [2022-07-12 10:38:21,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=17100, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17401, PETRI_PLACES=237, PETRI_TRANSITIONS=715} [2022-07-12 10:38:21,256 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 151 predicate places. [2022-07-12 10:38:21,256 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 715 transitions, 17401 flow [2022-07-12 10:38:21,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:21,257 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:21,257 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] [2022-07-12 10:38:21,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:38:21,257 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash 570332790, now seen corresponding path program 10 times [2022-07-12 10:38:21,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:21,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569507536] [2022-07-12 10:38:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:21,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:21,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569507536] [2022-07-12 10:38:21,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569507536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:38:21,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:38:21,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:38:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389350453] [2022-07-12 10:38:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:38:21,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:38:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:38:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:38:21,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-07-12 10:38:21,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 715 transitions, 17401 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:21,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:21,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-07-12 10:38:21,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:25,962 INFO L129 PetriNetUnfolder]: 7839/18997 cut-off events. [2022-07-12 10:38:25,963 INFO L130 PetriNetUnfolder]: For 377260/378069 co-relation queries the response was YES. [2022-07-12 10:38:26,176 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132423 conditions, 18997 events. 7839/18997 cut-off events. For 377260/378069 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 211246 event pairs, 2077 based on Foata normal form. 194/18715 useless extension candidates. Maximal degree in co-relation 132341. Up to 11793 conditions per place. [2022-07-12 10:38:26,296 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 627 selfloop transitions, 87 changer transitions 15/819 dead transitions. [2022-07-12 10:38:26,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 819 transitions, 21055 flow [2022-07-12 10:38:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:38:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:38:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-07-12 10:38:26,297 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-07-12 10:38:26,298 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-07-12 10:38:26,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-07-12 10:38:26,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:26,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-07-12 10:38:26,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,300 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:26,300 INFO L186 Difference]: Start difference. First operand has 237 places, 715 transitions, 17401 flow. Second operand 6 states and 486 transitions. [2022-07-12 10:38:26,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 819 transitions, 21055 flow [2022-07-12 10:38:27,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 819 transitions, 20722 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-07-12 10:38:27,517 INFO L242 Difference]: Finished difference. Result has 236 places, 713 transitions, 17288 flow [2022-07-12 10:38:27,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16673, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17288, PETRI_PLACES=236, PETRI_TRANSITIONS=713} [2022-07-12 10:38:27,518 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 150 predicate places. [2022-07-12 10:38:27,519 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 713 transitions, 17288 flow [2022-07-12 10:38:27,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:27,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:27,519 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] [2022-07-12 10:38:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:38:27,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -742089420, now seen corresponding path program 1 times [2022-07-12 10:38:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979773180] [2022-07-12 10:38:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979773180] [2022-07-12 10:38:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979773180] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87466839] [2022-07-12 10:38:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:27,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:27,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:38:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:27,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:38:27,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:28,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:28,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87466839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:28,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:28,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-12 10:38:28,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178530194] [2022-07-12 10:38:28,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:28,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:38:28,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:38:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:38:28,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-12 10:38:28,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 713 transitions, 17288 flow. Second operand has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:28,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:28,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-12 10:38:28,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:33,789 INFO L129 PetriNetUnfolder]: 7813/20810 cut-off events. [2022-07-12 10:38:33,789 INFO L130 PetriNetUnfolder]: For 398497/399514 co-relation queries the response was YES. [2022-07-12 10:38:33,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143211 conditions, 20810 events. 7813/20810 cut-off events. For 398497/399514 co-relation queries the response was YES. Maximal size of possible extension queue 1670. Compared 245359 event pairs, 537 based on Foata normal form. 329/20709 useless extension candidates. Maximal degree in co-relation 143130. Up to 8484 conditions per place. [2022-07-12 10:38:34,097 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 601 selfloop transitions, 432 changer transitions 9/1149 dead transitions. [2022-07-12 10:38:34,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1149 transitions, 29299 flow [2022-07-12 10:38:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:38:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:38:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 930 transitions. [2022-07-12 10:38:34,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7375099127676448 [2022-07-12 10:38:34,100 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 930 transitions. [2022-07-12 10:38:34,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 930 transitions. [2022-07-12 10:38:34,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:34,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 930 transitions. [2022-07-12 10:38:34,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 71.53846153846153) internal successors, (930), 13 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:34,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:34,103 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:34,103 INFO L186 Difference]: Start difference. First operand has 236 places, 713 transitions, 17288 flow. Second operand 13 states and 930 transitions. [2022-07-12 10:38:34,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1149 transitions, 29299 flow [2022-07-12 10:38:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1149 transitions, 28875 flow, removed 19 selfloop flow, removed 13 redundant places. [2022-07-12 10:38:35,471 INFO L242 Difference]: Finished difference. Result has 238 places, 925 transitions, 22584 flow [2022-07-12 10:38:35,477 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16872, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22584, PETRI_PLACES=238, PETRI_TRANSITIONS=925} [2022-07-12 10:38:35,477 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 152 predicate places. [2022-07-12 10:38:35,477 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 925 transitions, 22584 flow [2022-07-12 10:38:35,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:35,478 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:35,478 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] [2022-07-12 10:38:35,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:38:35,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:35,691 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2137589634, now seen corresponding path program 2 times [2022-07-12 10:38:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:35,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855149424] [2022-07-12 10:38:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:35,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855149424] [2022-07-12 10:38:35,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855149424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282274725] [2022-07-12 10:38:35,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:38:35,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:35,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:35,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:35,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:38:35,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:38:35,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:38:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:36,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:36,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282274725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:36,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:36,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-07-12 10:38:36,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585792241] [2022-07-12 10:38:36,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:36,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:38:36,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:38:36,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:38:36,879 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-07-12 10:38:36,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 925 transitions, 22584 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:36,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:36,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-07-12 10:38:36,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:44,435 INFO L129 PetriNetUnfolder]: 10225/25815 cut-off events. [2022-07-12 10:38:44,435 INFO L130 PetriNetUnfolder]: For 543747/544246 co-relation queries the response was YES. [2022-07-12 10:38:44,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190583 conditions, 25815 events. 10225/25815 cut-off events. For 543747/544246 co-relation queries the response was YES. Maximal size of possible extension queue 2134. Compared 305858 event pairs, 1596 based on Foata normal form. 54/25298 useless extension candidates. Maximal degree in co-relation 190504. Up to 14574 conditions per place. [2022-07-12 10:38:44,873 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 770 selfloop transitions, 409 changer transitions 8/1259 dead transitions. [2022-07-12 10:38:44,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 1259 transitions, 32949 flow [2022-07-12 10:38:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:38:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:38:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 895 transitions. [2022-07-12 10:38:44,874 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7097541633624108 [2022-07-12 10:38:44,875 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 895 transitions. [2022-07-12 10:38:44,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 895 transitions. [2022-07-12 10:38:44,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:44,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 895 transitions. [2022-07-12 10:38:44,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.84615384615384) internal successors, (895), 13 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,877 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:44,877 INFO L186 Difference]: Start difference. First operand has 238 places, 925 transitions, 22584 flow. Second operand 13 states and 895 transitions. [2022-07-12 10:38:44,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 1259 transitions, 32949 flow [2022-07-12 10:38:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1259 transitions, 32388 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-07-12 10:38:47,249 INFO L242 Difference]: Finished difference. Result has 248 places, 1092 transitions, 27863 flow [2022-07-12 10:38:47,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=22085, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=27863, PETRI_PLACES=248, PETRI_TRANSITIONS=1092} [2022-07-12 10:38:47,250 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 162 predicate places. [2022-07-12 10:38:47,250 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 1092 transitions, 27863 flow [2022-07-12 10:38:47,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:47,251 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:38:47,251 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] [2022-07-12 10:38:47,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:38:47,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 10:38:47,469 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:38:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:38:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1046393998, now seen corresponding path program 3 times [2022-07-12 10:38:47,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:38:47,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7181981] [2022-07-12 10:38:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:38:47,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:38:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:38:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:47,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:38:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7181981] [2022-07-12 10:38:47,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7181981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:38:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572584365] [2022-07-12 10:38:47,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:38:47,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:38:47,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:38:47,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:38:47,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:38:47,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:38:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:38:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 10:38:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:38:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:47,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:38:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:38:51,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572584365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:38:51,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:38:51,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-12 10:38:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704432213] [2022-07-12 10:38:51,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:38:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:38:51,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:38:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:38:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2022-07-12 10:38:51,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-07-12 10:38:51,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 1092 transitions, 27863 flow. Second operand has 18 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:51,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:38:51,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-07-12 10:38:51,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:38:58,469 INFO L129 PetriNetUnfolder]: 9701/25975 cut-off events. [2022-07-12 10:38:58,469 INFO L130 PetriNetUnfolder]: For 550397/551852 co-relation queries the response was YES. [2022-07-12 10:38:59,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189186 conditions, 25975 events. 9701/25975 cut-off events. For 550397/551852 co-relation queries the response was YES. Maximal size of possible extension queue 2182. Compared 317869 event pairs, 805 based on Foata normal form. 550/26016 useless extension candidates. Maximal degree in co-relation 189104. Up to 11174 conditions per place. [2022-07-12 10:38:59,175 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 762 selfloop transitions, 551 changer transitions 7/1426 dead transitions. [2022-07-12 10:38:59,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1426 transitions, 38465 flow [2022-07-12 10:38:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:38:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:38:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 922 transitions. [2022-07-12 10:38:59,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7311657414750198 [2022-07-12 10:38:59,176 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 922 transitions. [2022-07-12 10:38:59,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 922 transitions. [2022-07-12 10:38:59,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:38:59,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 922 transitions. [2022-07-12 10:38:59,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 70.92307692307692) internal successors, (922), 13 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:59,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:59,179 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 97.0) internal successors, (1358), 14 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:38:59,179 INFO L186 Difference]: Start difference. First operand has 248 places, 1092 transitions, 27863 flow. Second operand 13 states and 922 transitions. [2022-07-12 10:38:59,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1426 transitions, 38465 flow [2022-07-12 10:39:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1426 transitions, 37727 flow, removed 88 selfloop flow, removed 11 redundant places. [2022-07-12 10:39:02,132 INFO L242 Difference]: Finished difference. Result has 250 places, 1210 transitions, 31204 flow [2022-07-12 10:39:02,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=27147, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=31204, PETRI_PLACES=250, PETRI_TRANSITIONS=1210} [2022-07-12 10:39:02,133 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 164 predicate places. [2022-07-12 10:39:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 1210 transitions, 31204 flow [2022-07-12 10:39:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.0) internal successors, (1206), 18 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:02,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:02,134 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] [2022-07-12 10:39:02,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:02,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:02,368 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:39:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1287239242, now seen corresponding path program 1 times [2022-07-12 10:39:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989226694] [2022-07-12 10:39:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:02,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:02,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989226694] [2022-07-12 10:39:02,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989226694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:02,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945440331] [2022-07-12 10:39:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:02,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:02,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:39:02,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:39:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:39:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:02,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:02,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945440331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:02,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:02,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 17 [2022-07-12 10:39:02,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988629835] [2022-07-12 10:39:02,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:02,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:39:02,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:02,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:39:02,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:39:02,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-07-12 10:39:02,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1210 transitions, 31204 flow. Second operand has 17 states, 17 states have (on average 71.23529411764706) internal successors, (1211), 17 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:02,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:02,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-07-12 10:39:02,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand