./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:01:54,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:01:54,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:01:55,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:01:55,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:01:55,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:01:55,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:01:55,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:01:55,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:01:55,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:01:55,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:01:55,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:01:55,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:01:55,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:01:55,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:01:55,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:01:55,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:01:55,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:01:55,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:01:55,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:01:55,045 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:01:55,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:01:55,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:01:55,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:01:55,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:01:55,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:01:55,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:01:55,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:01:55,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:01:55,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:01:55,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:01:55,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:01:55,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:01:55,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:01:55,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:01:55,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:01:55,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:01:55,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:01:55,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:01:55,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:01:55,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:01:55,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:01:55,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:01:55,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:01:55,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:01:55,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:01:55,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:01:55,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:01:55,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:01:55,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:01:55,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:01:55,084 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:01:55,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:01:55,085 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:01:55,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:01:55,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:01:55,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:01:55,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:01:55,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:01:55,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:01:55,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:01:55,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:01:55,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:01:55,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:01:55,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:01:55,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:01:55,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:01:55,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:01:55,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:01:55,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:01:55,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:01:55,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:01:55,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:01:55,088 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:01:55,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:01:55,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:01:55,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c245694d80bb36f575f27eb50fa261b26ec38a4ced597397981ad6c6c7486707 [2022-07-21 09:01:55,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:01:55,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:01:55,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:01:55,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:01:55,470 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:01:55,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-21 09:01:55,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed15b294/a760caa711e046b0b4c8e6ee1f085d21/FLAG1125ce0a8 [2022-07-21 09:01:56,006 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:01:56,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c [2022-07-21 09:01:56,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed15b294/a760caa711e046b0b4c8e6ee1f085d21/FLAG1125ce0a8 [2022-07-21 09:01:56,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed15b294/a760caa711e046b0b4c8e6ee1f085d21 [2022-07-21 09:01:56,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:01:56,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:01:56,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:01:56,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:01:56,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:01:56,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59549624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56, skipping insertion in model container [2022-07-21 09:01:56,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:01:56,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:01:56,600 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2022-07-21 09:01:56,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:01:56,647 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:01:56,681 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-2.wvr.c[2554,2567] [2022-07-21 09:01:56,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:01:56,697 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:01:56,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56 WrapperNode [2022-07-21 09:01:56,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:01:56,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:01:56,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:01:56,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:01:56,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,739 INFO L137 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-07-21 09:01:56,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:01:56,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:01:56,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:01:56,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:01:56,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:01:56,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:01:56,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:01:56,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:01:56,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (1/1) ... [2022-07-21 09:01:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:01:56,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:01:56,812 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) [2022-07-21 09:01:56,838 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 [2022-07-21 09:01:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:01:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:01:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:01:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:01:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:01:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:01:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:01:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:01:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:01:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:01:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:01:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:01:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:01:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:01:56,859 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:01:56,952 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:01:56,954 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:01:57,219 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:01:57,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:01:57,248 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:01:57,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:01:57 BoogieIcfgContainer [2022-07-21 09:01:57,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:01:57,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:01:57,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:01:57,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:01:57,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:01:56" (1/3) ... [2022-07-21 09:01:57,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d999e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:01:57, skipping insertion in model container [2022-07-21 09:01:57,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:01:56" (2/3) ... [2022-07-21 09:01:57,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d999e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:01:57, skipping insertion in model container [2022-07-21 09:01:57,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:01:57" (3/3) ... [2022-07-21 09:01:57,260 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2022-07-21 09:01:57,266 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:01:57,276 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:01:57,276 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:01:57,276 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:01:57,363 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:01:57,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 224 flow [2022-07-21 09:01:57,471 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2022-07-21 09:01:57,474 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:01:57,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 8/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2022-07-21 09:01:57,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 224 flow [2022-07-21 09:01:57,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 198 flow [2022-07-21 09:01:57,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:01:57,506 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@55346e9f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ea34fe3 [2022-07-21 09:01:57,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:01:57,539 INFO L129 PetriNetUnfolder]: 8/92 cut-off events. [2022-07-21 09:01:57,539 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:01:57,540 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:57,540 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:57,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:01:57,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:57,546 INFO L85 PathProgramCache]: Analyzing trace with hash -669652547, now seen corresponding path program 1 times [2022-07-21 09:01:57,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:57,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917465134] [2022-07-21 09:01:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:01:57,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917465134] [2022-07-21 09:01:57,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917465134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:01:57,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:01:57,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:01:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840736810] [2022-07-21 09:01:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:01:57,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:01:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:01:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:01:57,828 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 104 [2022-07-21 09:01:57,831 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:57,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:57,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 104 [2022-07-21 09:01:57,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:57,877 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2022-07-21 09:01:57,877 INFO L130 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-07-21 09:01:57,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 96 events. 7/96 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 1 based on Foata normal form. 7/96 useless extension candidates. Maximal degree in co-relation 65. Up to 10 conditions per place. [2022-07-21 09:01:57,879 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 6 selfloop transitions, 0 changer transitions 2/89 dead transitions. [2022-07-21 09:01:57,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 202 flow [2022-07-21 09:01:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:01:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:01:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2022-07-21 09:01:57,896 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9423076923076923 [2022-07-21 09:01:57,897 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2022-07-21 09:01:57,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2022-07-21 09:01:57,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:57,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2022-07-21 09:01:57,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:57,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:57,914 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:57,916 INFO L186 Difference]: Start difference. First operand has 92 places, 93 transitions, 198 flow. Second operand 2 states and 196 transitions. [2022-07-21 09:01:57,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 202 flow [2022-07-21 09:01:57,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:01:57,929 INFO L242 Difference]: Finished difference. Result has 89 places, 87 transitions, 178 flow [2022-07-21 09:01:57,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2022-07-21 09:01:57,936 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2022-07-21 09:01:57,936 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 178 flow [2022-07-21 09:01:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:57,938 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:57,938 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:01:57,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:01:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1666724900, now seen corresponding path program 1 times [2022-07-21 09:01:57,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:57,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401485812] [2022-07-21 09:01:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:57,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:01:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401485812] [2022-07-21 09:01:58,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401485812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:01:58,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:01:58,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:01:58,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346418567] [2022-07-21 09:01:58,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:01:58,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:01:58,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:01:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:01:58,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:01:58,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:58,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:58,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:01:58,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:58,462 INFO L129 PetriNetUnfolder]: 21/139 cut-off events. [2022-07-21 09:01:58,463 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-07-21 09:01:58,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 139 events. 21/139 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 0 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 184. Up to 31 conditions per place. [2022-07-21 09:01:58,466 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 15 selfloop transitions, 9 changer transitions 4/97 dead transitions. [2022-07-21 09:01:58,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 257 flow [2022-07-21 09:01:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:01:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:01:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 582 transitions. [2022-07-21 09:01:58,474 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994505494505495 [2022-07-21 09:01:58,474 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 582 transitions. [2022-07-21 09:01:58,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 582 transitions. [2022-07-21 09:01:58,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:58,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 582 transitions. [2022-07-21 09:01:58,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 83.14285714285714) internal successors, (582), 7 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:58,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:58,482 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:58,482 INFO L186 Difference]: Start difference. First operand has 89 places, 87 transitions, 178 flow. Second operand 7 states and 582 transitions. [2022-07-21 09:01:58,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 257 flow [2022-07-21 09:01:58,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:01:58,487 INFO L242 Difference]: Finished difference. Result has 96 places, 91 transitions, 225 flow [2022-07-21 09:01:58,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2022-07-21 09:01:58,488 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 4 predicate places. [2022-07-21 09:01:58,488 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 225 flow [2022-07-21 09:01:58,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:58,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:58,490 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:58,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:01:58,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:01:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash 319045297, now seen corresponding path program 1 times [2022-07-21 09:01:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:58,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793739316] [2022-07-21 09:01:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:01:58,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:58,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793739316] [2022-07-21 09:01:58,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793739316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:01:58,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547556769] [2022-07-21 09:01:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:58,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:01:58,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:01:58,724 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) [2022-07-21 09:01:58,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:01:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 09:01:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:01:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:01:59,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:01:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:01:59,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547556769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:01:59,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:01:59,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-07-21 09:01:59,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070832298] [2022-07-21 09:01:59,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:01:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 09:01:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 09:01:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-07-21 09:01:59,626 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-21 09:01:59,627 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 225 flow. Second operand has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:59,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:59,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-21 09:01:59,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:00,019 INFO L129 PetriNetUnfolder]: 116/418 cut-off events. [2022-07-21 09:02:00,020 INFO L130 PetriNetUnfolder]: For 55/62 co-relation queries the response was YES. [2022-07-21 09:02:00,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 418 events. 116/418 cut-off events. For 55/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 7 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 732. Up to 66 conditions per place. [2022-07-21 09:02:00,024 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 57 selfloop transitions, 14 changer transitions 1/133 dead transitions. [2022-07-21 09:02:00,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 133 transitions, 480 flow [2022-07-21 09:02:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:02:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:02:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 763 transitions. [2022-07-21 09:02:00,027 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7336538461538461 [2022-07-21 09:02:00,027 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 763 transitions. [2022-07-21 09:02:00,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 763 transitions. [2022-07-21 09:02:00,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:00,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 763 transitions. [2022-07-21 09:02:00,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 76.3) internal successors, (763), 10 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,033 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,033 INFO L186 Difference]: Start difference. First operand has 96 places, 91 transitions, 225 flow. Second operand 10 states and 763 transitions. [2022-07-21 09:02:00,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 133 transitions, 480 flow [2022-07-21 09:02:00,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 461 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:00,037 INFO L242 Difference]: Finished difference. Result has 103 places, 99 transitions, 290 flow [2022-07-21 09:02:00,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2022-07-21 09:02:00,038 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2022-07-21 09:02:00,038 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 290 flow [2022-07-21 09:02:00,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.3076923076923) internal successors, (940), 13 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,039 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:00,039 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:00,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:02:00,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:00,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:00,256 INFO L85 PathProgramCache]: Analyzing trace with hash -217293375, now seen corresponding path program 2 times [2022-07-21 09:02:00,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:00,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762227200] [2022-07-21 09:02:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:00,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:00,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762227200] [2022-07-21 09:02:00,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762227200] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:00,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:00,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:02:00,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126645159] [2022-07-21 09:02:00,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:00,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:02:00,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:02:00,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:02:00,363 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-21 09:02:00,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:00,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-21 09:02:00,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:00,560 INFO L129 PetriNetUnfolder]: 116/398 cut-off events. [2022-07-21 09:02:00,560 INFO L130 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-07-21 09:02:00,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 398 events. 116/398 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1893 event pairs, 14 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 848. Up to 97 conditions per place. [2022-07-21 09:02:00,566 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 43 selfloop transitions, 16 changer transitions 4/124 dead transitions. [2022-07-21 09:02:00,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 124 transitions, 529 flow [2022-07-21 09:02:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:02:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:02:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 536 transitions. [2022-07-21 09:02:00,568 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7362637362637363 [2022-07-21 09:02:00,573 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 536 transitions. [2022-07-21 09:02:00,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 536 transitions. [2022-07-21 09:02:00,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:00,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 536 transitions. [2022-07-21 09:02:00,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.57142857142857) internal successors, (536), 7 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,578 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,578 INFO L186 Difference]: Start difference. First operand has 103 places, 99 transitions, 290 flow. Second operand 7 states and 536 transitions. [2022-07-21 09:02:00,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 124 transitions, 529 flow [2022-07-21 09:02:00,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 124 transitions, 523 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 09:02:00,584 INFO L242 Difference]: Finished difference. Result has 109 places, 105 transitions, 385 flow [2022-07-21 09:02:00,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2022-07-21 09:02:00,586 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 17 predicate places. [2022-07-21 09:02:00,586 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 385 flow [2022-07-21 09:02:00,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.0) internal successors, (438), 6 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,587 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:00,587 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:00,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:02:00,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1113196752, now seen corresponding path program 1 times [2022-07-21 09:02:00,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:00,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493608603] [2022-07-21 09:02:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:00,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493608603] [2022-07-21 09:02:00,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493608603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:00,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:00,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:02:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244373882] [2022-07-21 09:02:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:02:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:02:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:02:00,747 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-21 09:02:00,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:00,748 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-21 09:02:00,748 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:00,928 INFO L129 PetriNetUnfolder]: 111/390 cut-off events. [2022-07-21 09:02:00,928 INFO L130 PetriNetUnfolder]: For 450/457 co-relation queries the response was YES. [2022-07-21 09:02:00,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 390 events. 111/390 cut-off events. For 450/457 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1815 event pairs, 14 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 910. Up to 126 conditions per place. [2022-07-21 09:02:00,932 INFO L132 encePairwiseOnDemand]: 91/104 looper letters, 48 selfloop transitions, 12 changer transitions 5/126 dead transitions. [2022-07-21 09:02:00,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 593 flow [2022-07-21 09:02:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:02:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:02:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 537 transitions. [2022-07-21 09:02:00,934 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7376373626373627 [2022-07-21 09:02:00,934 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 537 transitions. [2022-07-21 09:02:00,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 537 transitions. [2022-07-21 09:02:00,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:00,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 537 transitions. [2022-07-21 09:02:00,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,938 INFO L186 Difference]: Start difference. First operand has 109 places, 105 transitions, 385 flow. Second operand 7 states and 537 transitions. [2022-07-21 09:02:00,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 593 flow [2022-07-21 09:02:00,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 585 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-21 09:02:00,943 INFO L242 Difference]: Finished difference. Result has 115 places, 105 transitions, 404 flow [2022-07-21 09:02:00,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2022-07-21 09:02:00,944 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 23 predicate places. [2022-07-21 09:02:00,944 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 404 flow [2022-07-21 09:02:00,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:00,945 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:00,945 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:00,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:02:00,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash 704217598, now seen corresponding path program 2 times [2022-07-21 09:02:00,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:00,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316888021] [2022-07-21 09:02:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316888021] [2022-07-21 09:02:01,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316888021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:01,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:01,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:02:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584388074] [2022-07-21 09:02:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:01,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:02:01,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:02:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:02:01,036 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-07-21 09:02:01,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 105 transitions, 404 flow. Second operand has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:01,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:01,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-07-21 09:02:01,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:01,198 INFO L129 PetriNetUnfolder]: 106/371 cut-off events. [2022-07-21 09:02:01,198 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-21 09:02:01,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 371 events. 106/371 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1567 event pairs, 17 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 907. Up to 75 conditions per place. [2022-07-21 09:02:01,202 INFO L132 encePairwiseOnDemand]: 93/104 looper letters, 47 selfloop transitions, 16 changer transitions 0/124 dead transitions. [2022-07-21 09:02:01,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 638 flow [2022-07-21 09:02:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:02:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:02:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 531 transitions. [2022-07-21 09:02:01,204 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293956043956044 [2022-07-21 09:02:01,204 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 531 transitions. [2022-07-21 09:02:01,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 531 transitions. [2022-07-21 09:02:01,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:01,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 531 transitions. [2022-07-21 09:02:01,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:01,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:01,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:01,208 INFO L186 Difference]: Start difference. First operand has 115 places, 105 transitions, 404 flow. Second operand 7 states and 531 transitions. [2022-07-21 09:02:01,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 638 flow [2022-07-21 09:02:01,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 610 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-07-21 09:02:01,213 INFO L242 Difference]: Finished difference. Result has 120 places, 110 transitions, 482 flow [2022-07-21 09:02:01,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=482, PETRI_PLACES=120, PETRI_TRANSITIONS=110} [2022-07-21 09:02:01,214 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 28 predicate places. [2022-07-21 09:02:01,214 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 110 transitions, 482 flow [2022-07-21 09:02:01,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:01,215 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:01,215 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:01,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:02:01,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -147861111, now seen corresponding path program 1 times [2022-07-21 09:02:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552726220] [2022-07-21 09:02:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:01,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552726220] [2022-07-21 09:02:01,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552726220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127589097] [2022-07-21 09:02:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:01,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:01,424 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) [2022-07-21 09:02:01,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:02:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:02:01,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:01,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127589097] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:02,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:02,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-07-21 09:02:02,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956482648] [2022-07-21 09:02:02,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:02,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:02:02,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:02:02,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:02:02,367 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 104 [2022-07-21 09:02:02,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 110 transitions, 482 flow. Second operand has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:02,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:02,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 104 [2022-07-21 09:02:02,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:05,002 INFO L129 PetriNetUnfolder]: 347/929 cut-off events. [2022-07-21 09:02:05,002 INFO L130 PetriNetUnfolder]: For 2692/2692 co-relation queries the response was YES. [2022-07-21 09:02:05,007 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 929 events. 347/929 cut-off events. For 2692/2692 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5041 event pairs, 10 based on Foata normal form. 44/909 useless extension candidates. Maximal degree in co-relation 2682. Up to 178 conditions per place. [2022-07-21 09:02:05,012 INFO L132 encePairwiseOnDemand]: 88/104 looper letters, 178 selfloop transitions, 87 changer transitions 0/324 dead transitions. [2022-07-21 09:02:05,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 324 transitions, 2285 flow [2022-07-21 09:02:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 09:02:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-07-21 09:02:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3067 transitions. [2022-07-21 09:02:05,020 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7021520146520146 [2022-07-21 09:02:05,020 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3067 transitions. [2022-07-21 09:02:05,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3067 transitions. [2022-07-21 09:02:05,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:05,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3067 transitions. [2022-07-21 09:02:05,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 73.02380952380952) internal successors, (3067), 42 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,038 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 104.0) internal successors, (4472), 43 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,038 INFO L186 Difference]: Start difference. First operand has 120 places, 110 transitions, 482 flow. Second operand 42 states and 3067 transitions. [2022-07-21 09:02:05,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 324 transitions, 2285 flow [2022-07-21 09:02:05,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 324 transitions, 2220 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-07-21 09:02:05,050 INFO L242 Difference]: Finished difference. Result has 189 places, 195 transitions, 1417 flow [2022-07-21 09:02:05,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1417, PETRI_PLACES=189, PETRI_TRANSITIONS=195} [2022-07-21 09:02:05,052 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 97 predicate places. [2022-07-21 09:02:05,052 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 195 transitions, 1417 flow [2022-07-21 09:02:05,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.25) internal successors, (1405), 20 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:05,054 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:05,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-21 09:02:05,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1821391862, now seen corresponding path program 2 times [2022-07-21 09:02:05,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027461216] [2022-07-21 09:02:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:05,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027461216] [2022-07-21 09:02:05,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027461216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:05,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:05,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:02:05,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384452223] [2022-07-21 09:02:05,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:02:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:05,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:02:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:02:05,368 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-21 09:02:05,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 195 transitions, 1417 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:05,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-21 09:02:05,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:05,692 INFO L129 PetriNetUnfolder]: 434/1682 cut-off events. [2022-07-21 09:02:05,692 INFO L130 PetriNetUnfolder]: For 12826/12903 co-relation queries the response was YES. [2022-07-21 09:02:05,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6581 conditions, 1682 events. 434/1682 cut-off events. For 12826/12903 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 13422 event pairs, 108 based on Foata normal form. 23/1564 useless extension candidates. Maximal degree in co-relation 6531. Up to 232 conditions per place. [2022-07-21 09:02:05,717 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 28 selfloop transitions, 5 changer transitions 0/212 dead transitions. [2022-07-21 09:02:05,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 212 transitions, 1563 flow [2022-07-21 09:02:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:02:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:02:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2022-07-21 09:02:05,719 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9038461538461539 [2022-07-21 09:02:05,719 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2022-07-21 09:02:05,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2022-07-21 09:02:05,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:05,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2022-07-21 09:02:05,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,722 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,722 INFO L186 Difference]: Start difference. First operand has 189 places, 195 transitions, 1417 flow. Second operand 4 states and 376 transitions. [2022-07-21 09:02:05,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 212 transitions, 1563 flow [2022-07-21 09:02:05,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 212 transitions, 1476 flow, removed 36 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:05,770 INFO L242 Difference]: Finished difference. Result has 190 places, 198 transitions, 1364 flow [2022-07-21 09:02:05,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1364, PETRI_PLACES=190, PETRI_TRANSITIONS=198} [2022-07-21 09:02:05,773 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 98 predicate places. [2022-07-21 09:02:05,773 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 198 transitions, 1364 flow [2022-07-21 09:02:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:05,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:05,774 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:02:05,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1384763482, now seen corresponding path program 1 times [2022-07-21 09:02:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:05,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669663549] [2022-07-21 09:02:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:02:05,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669663549] [2022-07-21 09:02:05,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669663549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442339088] [2022-07-21 09:02:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:05,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:05,985 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) [2022-07-21 09:02:05,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:02:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:02:06,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:02:06,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 09:02:06,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442339088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:06,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:06,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-21 09:02:06,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602986431] [2022-07-21 09:02:06,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:06,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:02:06,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:02:06,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:02:06,842 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-07-21 09:02:06,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 198 transitions, 1364 flow. Second operand has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:06,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:06,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-07-21 09:02:06,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:07,696 INFO L129 PetriNetUnfolder]: 828/2406 cut-off events. [2022-07-21 09:02:07,697 INFO L130 PetriNetUnfolder]: For 18550/18603 co-relation queries the response was YES. [2022-07-21 09:02:07,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10323 conditions, 2406 events. 828/2406 cut-off events. For 18550/18603 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18926 event pairs, 65 based on Foata normal form. 15/2264 useless extension candidates. Maximal degree in co-relation 10270. Up to 449 conditions per place. [2022-07-21 09:02:07,729 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 115 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2022-07-21 09:02:07,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2222 flow [2022-07-21 09:02:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:02:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:02:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 973 transitions. [2022-07-21 09:02:07,732 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7196745562130178 [2022-07-21 09:02:07,732 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 973 transitions. [2022-07-21 09:02:07,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 973 transitions. [2022-07-21 09:02:07,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:07,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 973 transitions. [2022-07-21 09:02:07,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.84615384615384) internal successors, (973), 13 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:07,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:07,738 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 104.0) internal successors, (1456), 14 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:07,738 INFO L186 Difference]: Start difference. First operand has 190 places, 198 transitions, 1364 flow. Second operand 13 states and 973 transitions. [2022-07-21 09:02:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2222 flow [2022-07-21 09:02:07,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 249 transitions, 2222 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:02:07,801 INFO L242 Difference]: Finished difference. Result has 206 places, 206 transitions, 1660 flow [2022-07-21 09:02:07,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1660, PETRI_PLACES=206, PETRI_TRANSITIONS=206} [2022-07-21 09:02:07,802 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 114 predicate places. [2022-07-21 09:02:07,803 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 206 transitions, 1660 flow [2022-07-21 09:02:07,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 71.22222222222223) internal successors, (1282), 18 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:07,803 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:07,804 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:07,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:08,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:08,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash -932018700, now seen corresponding path program 1 times [2022-07-21 09:02:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:08,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852504517] [2022-07-21 09:02:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 09:02:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852504517] [2022-07-21 09:02:08,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852504517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:08,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:08,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:02:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855469514] [2022-07-21 09:02:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:08,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:02:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:02:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:02:08,123 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-21 09:02:08,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 206 transitions, 1660 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:08,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:08,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-21 09:02:08,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:08,492 INFO L129 PetriNetUnfolder]: 375/1488 cut-off events. [2022-07-21 09:02:08,493 INFO L130 PetriNetUnfolder]: For 11290/11369 co-relation queries the response was YES. [2022-07-21 09:02:08,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5982 conditions, 1488 events. 375/1488 cut-off events. For 11290/11369 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11125 event pairs, 90 based on Foata normal form. 31/1394 useless extension candidates. Maximal degree in co-relation 5925. Up to 235 conditions per place. [2022-07-21 09:02:08,513 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 24 selfloop transitions, 6 changer transitions 0/217 dead transitions. [2022-07-21 09:02:08,514 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 217 transitions, 1777 flow [2022-07-21 09:02:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:02:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:02:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 373 transitions. [2022-07-21 09:02:08,516 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8966346153846154 [2022-07-21 09:02:08,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 373 transitions. [2022-07-21 09:02:08,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 373 transitions. [2022-07-21 09:02:08,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:08,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 373 transitions. [2022-07-21 09:02:08,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:08,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:08,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:08,520 INFO L186 Difference]: Start difference. First operand has 206 places, 206 transitions, 1660 flow. Second operand 4 states and 373 transitions. [2022-07-21 09:02:08,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 217 transitions, 1777 flow [2022-07-21 09:02:08,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 217 transitions, 1742 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-07-21 09:02:08,569 INFO L242 Difference]: Finished difference. Result has 204 places, 208 transitions, 1659 flow [2022-07-21 09:02:08,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1659, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-07-21 09:02:08,571 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 112 predicate places. [2022-07-21 09:02:08,571 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 1659 flow [2022-07-21 09:02:08,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:08,572 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:08,572 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:08,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:02:08,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 591378688, now seen corresponding path program 2 times [2022-07-21 09:02:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:08,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537525633] [2022-07-21 09:02:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:08,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:02:08,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537525633] [2022-07-21 09:02:08,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537525633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:08,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:08,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:02:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018366036] [2022-07-21 09:02:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:08,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:02:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:02:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:02:08,670 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-21 09:02:08,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 1659 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:08,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:08,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-21 09:02:08,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:09,386 INFO L129 PetriNetUnfolder]: 1011/3594 cut-off events. [2022-07-21 09:02:09,387 INFO L130 PetriNetUnfolder]: For 29453/29537 co-relation queries the response was YES. [2022-07-21 09:02:09,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15601 conditions, 3594 events. 1011/3594 cut-off events. For 29453/29537 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34512 event pairs, 266 based on Foata normal form. 26/3394 useless extension candidates. Maximal degree in co-relation 15542. Up to 506 conditions per place. [2022-07-21 09:02:09,448 INFO L132 encePairwiseOnDemand]: 99/104 looper letters, 29 selfloop transitions, 5 changer transitions 0/226 dead transitions. [2022-07-21 09:02:09,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 226 transitions, 1809 flow [2022-07-21 09:02:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:02:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:02:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2022-07-21 09:02:09,451 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.90625 [2022-07-21 09:02:09,451 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2022-07-21 09:02:09,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2022-07-21 09:02:09,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:09,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2022-07-21 09:02:09,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:09,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:09,457 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:09,457 INFO L186 Difference]: Start difference. First operand has 204 places, 208 transitions, 1659 flow. Second operand 4 states and 377 transitions. [2022-07-21 09:02:09,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 226 transitions, 1809 flow [2022-07-21 09:02:09,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 226 transitions, 1809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:02:09,565 INFO L242 Difference]: Finished difference. Result has 210 places, 211 transitions, 1693 flow [2022-07-21 09:02:09,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1693, PETRI_PLACES=210, PETRI_TRANSITIONS=211} [2022-07-21 09:02:09,566 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 118 predicate places. [2022-07-21 09:02:09,566 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 211 transitions, 1693 flow [2022-07-21 09:02:09,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:09,567 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:09,567 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:09,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:02:09,568 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash 291710930, now seen corresponding path program 1 times [2022-07-21 09:02:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:09,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890083445] [2022-07-21 09:02:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:09,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:09,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:09,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890083445] [2022-07-21 09:02:09,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890083445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359473844] [2022-07-21 09:02:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:09,762 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) [2022-07-21 09:02:09,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:02:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:02:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:10,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:10,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359473844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:10,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:10,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-21 09:02:10,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002127228] [2022-07-21 09:02:10,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:10,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:02:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:02:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:02:10,142 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:02:10,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 211 transitions, 1693 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:10,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:10,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:02:10,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:11,198 INFO L129 PetriNetUnfolder]: 1003/3973 cut-off events. [2022-07-21 09:02:11,198 INFO L130 PetriNetUnfolder]: For 35812/36067 co-relation queries the response was YES. [2022-07-21 09:02:11,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18085 conditions, 3973 events. 1003/3973 cut-off events. For 35812/36067 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 39168 event pairs, 295 based on Foata normal form. 62/3861 useless extension candidates. Maximal degree in co-relation 18023. Up to 611 conditions per place. [2022-07-21 09:02:11,244 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 36 selfloop transitions, 20 changer transitions 4/246 dead transitions. [2022-07-21 09:02:11,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 246 transitions, 1951 flow [2022-07-21 09:02:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:02:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:02:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 844 transitions. [2022-07-21 09:02:11,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8115384615384615 [2022-07-21 09:02:11,246 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 844 transitions. [2022-07-21 09:02:11,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 844 transitions. [2022-07-21 09:02:11,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:11,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 844 transitions. [2022-07-21 09:02:11,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.4) internal successors, (844), 10 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:11,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:11,251 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:11,251 INFO L186 Difference]: Start difference. First operand has 210 places, 211 transitions, 1693 flow. Second operand 10 states and 844 transitions. [2022-07-21 09:02:11,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 246 transitions, 1951 flow [2022-07-21 09:02:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 246 transitions, 1951 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:02:11,368 INFO L242 Difference]: Finished difference. Result has 222 places, 222 transitions, 1799 flow [2022-07-21 09:02:11,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1799, PETRI_PLACES=222, PETRI_TRANSITIONS=222} [2022-07-21 09:02:11,369 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 130 predicate places. [2022-07-21 09:02:11,369 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 222 transitions, 1799 flow [2022-07-21 09:02:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:11,370 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:11,370 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:11,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:11,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:11,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -398723812, now seen corresponding path program 2 times [2022-07-21 09:02:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:11,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329384149] [2022-07-21 09:02:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:11,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:11,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:11,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329384149] [2022-07-21 09:02:11,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329384149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741471383] [2022-07-21 09:02:11,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:02:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:11,768 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) [2022-07-21 09:02:11,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:02:11,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:02:11,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:02:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:02:11,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:12,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741471383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:12,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:12,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-21 09:02:12,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843644852] [2022-07-21 09:02:12,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:02:12,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:02:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:02:12,133 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:02:12,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 222 transitions, 1799 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:12,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:12,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:02:12,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:13,549 INFO L129 PetriNetUnfolder]: 1603/6338 cut-off events. [2022-07-21 09:02:13,549 INFO L130 PetriNetUnfolder]: For 61811/62357 co-relation queries the response was YES. [2022-07-21 09:02:13,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30128 conditions, 6338 events. 1603/6338 cut-off events. For 61811/62357 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 67958 event pairs, 372 based on Foata normal form. 113/6203 useless extension candidates. Maximal degree in co-relation 30062. Up to 785 conditions per place. [2022-07-21 09:02:13,630 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 47 selfloop transitions, 35 changer transitions 4/272 dead transitions. [2022-07-21 09:02:13,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 272 transitions, 2228 flow [2022-07-21 09:02:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:02:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:02:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 934 transitions. [2022-07-21 09:02:13,638 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8164335664335665 [2022-07-21 09:02:13,638 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 934 transitions. [2022-07-21 09:02:13,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 934 transitions. [2022-07-21 09:02:13,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:13,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 934 transitions. [2022-07-21 09:02:13,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.9090909090909) internal successors, (934), 11 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:13,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:13,645 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:13,645 INFO L186 Difference]: Start difference. First operand has 222 places, 222 transitions, 1799 flow. Second operand 11 states and 934 transitions. [2022-07-21 09:02:13,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 272 transitions, 2228 flow [2022-07-21 09:02:13,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 272 transitions, 2147 flow, removed 35 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:13,880 INFO L242 Difference]: Finished difference. Result has 228 places, 237 transitions, 1921 flow [2022-07-21 09:02:13,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1921, PETRI_PLACES=228, PETRI_TRANSITIONS=237} [2022-07-21 09:02:13,881 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 136 predicate places. [2022-07-21 09:02:13,881 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 237 transitions, 1921 flow [2022-07-21 09:02:13,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:13,882 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:13,882 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:13,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:02:14,096 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1128249126, now seen corresponding path program 3 times [2022-07-21 09:02:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:14,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043745583] [2022-07-21 09:02:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043745583] [2022-07-21 09:02:14,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043745583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:14,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876828201] [2022-07-21 09:02:14,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:02:14,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:14,252 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) [2022-07-21 09:02:14,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:02:14,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:02:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:02:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:02:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:14,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876828201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:14,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-21 09:02:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783022766] [2022-07-21 09:02:14,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:02:14,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:02:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:02:14,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:02:14,682 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 237 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:14,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:14,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:02:14,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:16,428 INFO L129 PetriNetUnfolder]: 1998/8151 cut-off events. [2022-07-21 09:02:16,428 INFO L130 PetriNetUnfolder]: For 80698/81392 co-relation queries the response was YES. [2022-07-21 09:02:16,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38650 conditions, 8151 events. 1998/8151 cut-off events. For 80698/81392 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 93127 event pairs, 520 based on Foata normal form. 126/7957 useless extension candidates. Maximal degree in co-relation 38582. Up to 1104 conditions per place. [2022-07-21 09:02:16,534 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 72 selfloop transitions, 27 changer transitions 4/289 dead transitions. [2022-07-21 09:02:16,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 289 transitions, 2414 flow [2022-07-21 09:02:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:02:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:02:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-21 09:02:16,536 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-21 09:02:16,536 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-21 09:02:16,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-21 09:02:16,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:16,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-21 09:02:16,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:16,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:16,541 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:16,541 INFO L186 Difference]: Start difference. First operand has 228 places, 237 transitions, 1921 flow. Second operand 11 states and 931 transitions. [2022-07-21 09:02:16,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 289 transitions, 2414 flow [2022-07-21 09:02:16,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 289 transitions, 2326 flow, removed 34 selfloop flow, removed 6 redundant places. [2022-07-21 09:02:16,839 INFO L242 Difference]: Finished difference. Result has 234 places, 253 transitions, 2060 flow [2022-07-21 09:02:16,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2060, PETRI_PLACES=234, PETRI_TRANSITIONS=253} [2022-07-21 09:02:16,840 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 142 predicate places. [2022-07-21 09:02:16,840 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2060 flow [2022-07-21 09:02:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:16,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:16,841 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:16,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:17,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:17,051 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:17,052 INFO L85 PathProgramCache]: Analyzing trace with hash 409894142, now seen corresponding path program 1 times [2022-07-21 09:02:17,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:17,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557660382] [2022-07-21 09:02:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557660382] [2022-07-21 09:02:17,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557660382] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:02:17,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:02:17,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:02:17,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144601014] [2022-07-21 09:02:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:02:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:02:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:02:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:02:17,104 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 104 [2022-07-21 09:02:17,104 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 253 transitions, 2060 flow. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:17,104 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:17,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 104 [2022-07-21 09:02:17,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:18,428 INFO L129 PetriNetUnfolder]: 2124/8002 cut-off events. [2022-07-21 09:02:18,428 INFO L130 PetriNetUnfolder]: For 79350/79767 co-relation queries the response was YES. [2022-07-21 09:02:18,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38630 conditions, 8002 events. 2124/8002 cut-off events. For 79350/79767 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 89616 event pairs, 475 based on Foata normal form. 191/7895 useless extension candidates. Maximal degree in co-relation 38560. Up to 1057 conditions per place. [2022-07-21 09:02:18,549 INFO L132 encePairwiseOnDemand]: 100/104 looper letters, 80 selfloop transitions, 6 changer transitions 0/296 dead transitions. [2022-07-21 09:02:18,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 296 transitions, 2530 flow [2022-07-21 09:02:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:02:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:02:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2022-07-21 09:02:18,551 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9014423076923077 [2022-07-21 09:02:18,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2022-07-21 09:02:18,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2022-07-21 09:02:18,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:18,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2022-07-21 09:02:18,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:18,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:18,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:18,555 INFO L186 Difference]: Start difference. First operand has 234 places, 253 transitions, 2060 flow. Second operand 4 states and 375 transitions. [2022-07-21 09:02:18,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 296 transitions, 2530 flow [2022-07-21 09:02:18,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 296 transitions, 2493 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:18,916 INFO L242 Difference]: Finished difference. Result has 232 places, 253 transitions, 2059 flow [2022-07-21 09:02:18,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2059, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2022-07-21 09:02:18,916 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 140 predicate places. [2022-07-21 09:02:18,917 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 2059 flow [2022-07-21 09:02:18,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:18,917 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:18,917 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:18,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:02:18,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:18,918 INFO L85 PathProgramCache]: Analyzing trace with hash 184085024, now seen corresponding path program 4 times [2022-07-21 09:02:18,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:18,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908358991] [2022-07-21 09:02:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:19,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:19,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908358991] [2022-07-21 09:02:19,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908358991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:19,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887726219] [2022-07-21 09:02:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:02:19,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:19,047 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) [2022-07-21 09:02:19,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:02:19,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:02:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:02:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:02:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:19,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887726219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:19,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:19,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-07-21 09:02:19,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458014775] [2022-07-21 09:02:19,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:19,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:02:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:02:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:02:19,376 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:02:19,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 2059 flow. Second operand has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:19,377 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:19,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:02:19,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:20,732 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([253] L44-->L51: Formula: (= v_~pos~0_23 (+ v_~pos~0_24 1)) InVars {~pos~0=v_~pos~0_24} OutVars{thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_1|, ~pos~0=v_~pos~0_23} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#t~post1, ~pos~0][125], [1259#(not (= (+ ~d1~0 (* (- 256) (div ~d1~0 256))) 0)), Black: 640#(and (<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), Black: 631#true, 1843#(not (= (+ (* (- 256) (div ~d2~0 256)) ~d2~0) 0)), 1586#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1826#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (<= |thread2Thread1of1ForFork1_#t~post4| (* (div |thread2Thread1of1ForFork1_#t~post4| 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1270#(and (<= ~i2~0 (* (div ~i2~0 4294967296) 4294967296)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1265#true, Black: 1501#(and (<= ~i2~0 (+ (* (div (+ (- 1) ~i2~0) 4294967296) 4294967296) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 6#L94-4true, 1837#(and (<= (div ~d1~0 256) 0) (<= 1 ~d1~0)), Black: 1834#true, 3656#true, Black: 1844#(and (<= ~d2~0 (* (div ~d2~0 256) 256)) (<= 0 ~d2~0)), Black: 1841#true, Black: 3052#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 3053#(<= ~pos~0 (+ (* (div (+ (- 1) ~pos~0) 4294967296) 4294967296) 1)), Black: 3649#true, 131#(<= (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296))), Black: 1166#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1198#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1208#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1204#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1))), Black: 1212#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 618#true, Black: 1178#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1202#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1186#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 106#true, Black: 1210#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1196#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1206#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 603#true, Black: 1168#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1162#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 592#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 126#true, Black: 652#(and (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1192#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 264#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod ~i2~0 4294967296) 0)), Black: 594#(and (= (mod ~i2~0 4294967296) (mod ~i1~0 4294967296)) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0)), Black: 1182#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), 3048#true, Black: 1194#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 650#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1188#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1170#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 1176#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1214#(and (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (mod (+ ~i2~0 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 1200#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 645#true, 8#L51true, Black: 1220#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 941#(< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)), Black: 1174#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 59#L70true, Black: 868#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (< (mod (+ 4294967295 ~i2~0) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 2452#(<= ~pos~0 (* 4294967296 (div ~pos~0 4294967296))), Black: 1190#(and (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (< (mod ~i2~0 4294967296) (mod (* 2 ~N~0) 4294967296)) (<= ~i1~0 (+ (* 4294967296 (div ~i1~0 4294967296)) 1)) (< (mod (+ |thread2Thread1of1ForFork1_#t~post4| 1) 4294967296) (mod (* 2 ~N~0) 4294967296))), Black: 608#(<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 1172#(and (= (mod (+ 4294967295 ~i2~0) 4294967296) 0) (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (= (mod |thread2Thread1of1ForFork1_#t~post4| 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), 2448#true, Black: 1164#(and (<= ~i1~0 (* 4294967296 (div ~i1~0 4294967296))) (<= (* 4294967296 (div (+ |thread1Thread1of1ForFork0_#t~post3| 4294967295) 4294967296)) |thread1Thread1of1ForFork0_#t~post3|) (or (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 0)) (or (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (= (mod ~i2~0 4294967296) 0) (< (* (div (* 2 ~N~0) 4294967296) 2147483648) ~N~0)), Black: 610#(and (<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)) (<= (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))) (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296))))), Black: 607#(<= (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0) (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0)), 1849#true, Black: 1257#true, Black: 1260#(and (not (<= (+ (div ~d1~0 256) 1) 0)) (<= ~d1~0 (* 256 (div ~d1~0 256)))), Black: 623#(<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))), Black: 627#(and (<= (+ (* 2 ~N~0) (* (div ~i2~0 4294967296) 4294967296)) (+ ~i2~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)))) (<= (+ (* (div ~i2~0 4294967296) 4294967296) ~i1~0) (+ (* 4294967296 (div ~i1~0 4294967296)) ~i2~0))), 3652#(and (<= (div ~d2~0 256) 0) (<= 1 ~d2~0)), Black: 113#(= (+ (* (- 4294967296) (div ~pos~0 4294967296)) ~pos~0) 0), 636#(<= (+ ~i1~0 (* 4294967296 (div (* 2 ~N~0) 4294967296)) 1) (+ (* 2 ~N~0) (* 4294967296 (div ~i1~0 4294967296))))]) [2022-07-21 09:02:20,734 INFO L384 tUnfolder$Statistics]: this new event has 96 ancestors and is cut-off event [2022-07-21 09:02:20,734 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-21 09:02:20,734 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-21 09:02:20,734 INFO L387 tUnfolder$Statistics]: existing Event has 89 ancestors and is cut-off event [2022-07-21 09:02:20,849 INFO L129 PetriNetUnfolder]: 1872/7710 cut-off events. [2022-07-21 09:02:20,850 INFO L130 PetriNetUnfolder]: For 79989/80605 co-relation queries the response was YES. [2022-07-21 09:02:20,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37808 conditions, 7710 events. 1872/7710 cut-off events. For 79989/80605 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 87447 event pairs, 541 based on Foata normal form. 126/7500 useless extension candidates. Maximal degree in co-relation 37738. Up to 1226 conditions per place. [2022-07-21 09:02:20,939 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 76 selfloop transitions, 27 changer transitions 4/295 dead transitions. [2022-07-21 09:02:20,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 295 transitions, 2485 flow [2022-07-21 09:02:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:02:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:02:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 843 transitions. [2022-07-21 09:02:20,941 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8105769230769231 [2022-07-21 09:02:20,941 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 843 transitions. [2022-07-21 09:02:20,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 843 transitions. [2022-07-21 09:02:20,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:20,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 843 transitions. [2022-07-21 09:02:20,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:20,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:20,945 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:20,945 INFO L186 Difference]: Start difference. First operand has 232 places, 253 transitions, 2059 flow. Second operand 10 states and 843 transitions. [2022-07-21 09:02:20,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 295 transitions, 2485 flow [2022-07-21 09:02:21,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 295 transitions, 2485 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:02:21,250 INFO L242 Difference]: Finished difference. Result has 246 places, 271 transitions, 2289 flow [2022-07-21 09:02:21,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2289, PETRI_PLACES=246, PETRI_TRANSITIONS=271} [2022-07-21 09:02:21,253 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 154 predicate places. [2022-07-21 09:02:21,254 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 271 transitions, 2289 flow [2022-07-21 09:02:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:21,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:21,259 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:21,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 09:02:21,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:21,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1699141446, now seen corresponding path program 5 times [2022-07-21 09:02:21,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494559343] [2022-07-21 09:02:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:21,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:21,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:21,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494559343] [2022-07-21 09:02:21,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494559343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:21,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339133668] [2022-07-21 09:02:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:02:21,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:21,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:21,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:02:21,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:02:21,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:02:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:02:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:02:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:21,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:22,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339133668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:22,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:22,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-21 09:02:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111320392] [2022-07-21 09:02:22,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:22,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:02:22,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:22,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:02:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:02:22,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:02:22,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 271 transitions, 2289 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:22,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:22,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:02:22,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:23,898 INFO L129 PetriNetUnfolder]: 2333/9545 cut-off events. [2022-07-21 09:02:23,898 INFO L130 PetriNetUnfolder]: For 102247/103107 co-relation queries the response was YES. [2022-07-21 09:02:23,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47581 conditions, 9545 events. 2333/9545 cut-off events. For 102247/103107 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 112166 event pairs, 613 based on Foata normal form. 245/9401 useless extension candidates. Maximal degree in co-relation 47505. Up to 1300 conditions per place. [2022-07-21 09:02:24,016 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 75 selfloop transitions, 61 changer transitions 4/328 dead transitions. [2022-07-21 09:02:24,016 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 328 transitions, 2918 flow [2022-07-21 09:02:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:02:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:02:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 933 transitions. [2022-07-21 09:02:24,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8155594405594405 [2022-07-21 09:02:24,018 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 933 transitions. [2022-07-21 09:02:24,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 933 transitions. [2022-07-21 09:02:24,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:24,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 933 transitions. [2022-07-21 09:02:24,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.81818181818181) internal successors, (933), 11 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,021 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,021 INFO L186 Difference]: Start difference. First operand has 246 places, 271 transitions, 2289 flow. Second operand 11 states and 933 transitions. [2022-07-21 09:02:24,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 328 transitions, 2918 flow [2022-07-21 09:02:24,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 328 transitions, 2883 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:24,313 INFO L242 Difference]: Finished difference. Result has 255 places, 293 transitions, 2698 flow [2022-07-21 09:02:24,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2698, PETRI_PLACES=255, PETRI_TRANSITIONS=293} [2022-07-21 09:02:24,314 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 163 predicate places. [2022-07-21 09:02:24,314 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 293 transitions, 2698 flow [2022-07-21 09:02:24,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:24,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:24,314 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:24,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 09:02:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:02:24,527 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash -110206322, now seen corresponding path program 6 times [2022-07-21 09:02:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726307714] [2022-07-21 09:02:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:24,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726307714] [2022-07-21 09:02:24,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726307714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565401594] [2022-07-21 09:02:24,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:02:24,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:24,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:24,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:02:24,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:02:24,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:02:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:02:24,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 09:02:24,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:25,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:02:25,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565401594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:25,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:25,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-07-21 09:02:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175737652] [2022-07-21 09:02:25,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 09:02:25,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 09:02:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 09:02:25,172 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-07-21 09:02:25,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 293 transitions, 2698 flow. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:25,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:25,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-07-21 09:02:25,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:02:27,367 INFO L129 PetriNetUnfolder]: 2497/10270 cut-off events. [2022-07-21 09:02:27,367 INFO L130 PetriNetUnfolder]: For 115350/116438 co-relation queries the response was YES. [2022-07-21 09:02:27,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52490 conditions, 10270 events. 2497/10270 cut-off events. For 115350/116438 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 122677 event pairs, 676 based on Foata normal form. 259/10117 useless extension candidates. Maximal degree in co-relation 52409. Up to 1413 conditions per place. [2022-07-21 09:02:27,492 INFO L132 encePairwiseOnDemand]: 92/104 looper letters, 112 selfloop transitions, 39 changer transitions 4/343 dead transitions. [2022-07-21 09:02:27,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 343 transitions, 3327 flow [2022-07-21 09:02:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:02:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:02:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 931 transitions. [2022-07-21 09:02:27,494 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138111888111889 [2022-07-21 09:02:27,494 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 931 transitions. [2022-07-21 09:02:27,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 931 transitions. [2022-07-21 09:02:27,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:02:27,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 931 transitions. [2022-07-21 09:02:27,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.63636363636364) internal successors, (931), 11 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,498 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,498 INFO L186 Difference]: Start difference. First operand has 255 places, 293 transitions, 2698 flow. Second operand 11 states and 931 transitions. [2022-07-21 09:02:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 343 transitions, 3327 flow [2022-07-21 09:02:27,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 343 transitions, 3260 flow, removed 29 selfloop flow, removed 5 redundant places. [2022-07-21 09:02:27,830 INFO L242 Difference]: Finished difference. Result has 263 places, 307 transitions, 2930 flow [2022-07-21 09:02:27,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2930, PETRI_PLACES=263, PETRI_TRANSITIONS=307} [2022-07-21 09:02:27,831 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 171 predicate places. [2022-07-21 09:02:27,831 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 307 transitions, 2930 flow [2022-07-21 09:02:27,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 12 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:27,831 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:02:27,832 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:02:27,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:02:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:02:28,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:02:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:02:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2103120229, now seen corresponding path program 7 times [2022-07-21 09:02:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:02:28,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135701886] [2022-07-21 09:02:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:02:28,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:02:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:02:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135701886] [2022-07-21 09:02:28,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135701886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:02:28,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623181883] [2022-07-21 09:02:28,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:02:28,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:02:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:02:28,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:02:28,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:02:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:02:28,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 09:02:28,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:02:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:29,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:02:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:02:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623181883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:02:32,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:02:32,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-21 09:02:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348511305] [2022-07-21 09:02:32,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:02:32,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 09:02:32,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:02:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 09:02:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 09:02:32,305 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-21 09:02:32,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 307 transitions, 2930 flow. Second operand has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:02:32,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:02:32,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-21 09:02:32,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:03:01,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:03:27,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-21 09:03:35,321 INFO L129 PetriNetUnfolder]: 8004/24504 cut-off events. [2022-07-21 09:03:35,321 INFO L130 PetriNetUnfolder]: For 307428/307620 co-relation queries the response was YES. [2022-07-21 09:03:35,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138898 conditions, 24504 events. 8004/24504 cut-off events. For 307428/307620 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 303650 event pairs, 717 based on Foata normal form. 429/24873 useless extension candidates. Maximal degree in co-relation 138813. Up to 5384 conditions per place. [2022-07-21 09:03:36,064 INFO L132 encePairwiseOnDemand]: 84/104 looper letters, 868 selfloop transitions, 335 changer transitions 0/1266 dead transitions. [2022-07-21 09:03:36,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1266 transitions, 16029 flow [2022-07-21 09:03:36,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-21 09:03:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-07-21 09:03:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 6529 transitions. [2022-07-21 09:03:36,082 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.66082995951417 [2022-07-21 09:03:36,083 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 6529 transitions. [2022-07-21 09:03:36,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 6529 transitions. [2022-07-21 09:03:36,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:03:36,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 6529 transitions. [2022-07-21 09:03:36,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 68.72631578947369) internal successors, (6529), 95 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:36,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:36,110 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 104.0) internal successors, (9984), 96 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:36,110 INFO L186 Difference]: Start difference. First operand has 263 places, 307 transitions, 2930 flow. Second operand 95 states and 6529 transitions. [2022-07-21 09:03:36,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1266 transitions, 16029 flow [2022-07-21 09:03:37,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1266 transitions, 15900 flow, removed 52 selfloop flow, removed 6 redundant places. [2022-07-21 09:03:37,434 INFO L242 Difference]: Finished difference. Result has 389 places, 588 transitions, 7784 flow [2022-07-21 09:03:37,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7784, PETRI_PLACES=389, PETRI_TRANSITIONS=588} [2022-07-21 09:03:37,435 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 297 predicate places. [2022-07-21 09:03:37,435 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 588 transitions, 7784 flow [2022-07-21 09:03:37,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 65.86842105263158) internal successors, (2503), 38 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:37,436 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:03:37,436 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:03:37,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:03:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:37,637 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:03:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:03:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash 88614813, now seen corresponding path program 8 times [2022-07-21 09:03:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:03:37,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127342484] [2022-07-21 09:03:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:03:37,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:03:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:03:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:03:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127342484] [2022-07-21 09:03:38,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127342484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:03:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044136820] [2022-07-21 09:03:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:03:38,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:03:38,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:03:38,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:03:38,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:03:38,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:03:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:03:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 09:03:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:03:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:03:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:03:44,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044136820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:03:44,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:03:44,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 39 [2022-07-21 09:03:44,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777114865] [2022-07-21 09:03:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:03:44,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 09:03:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:03:44,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 09:03:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 09:03:44,029 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 104 [2022-07-21 09:03:44,031 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 588 transitions, 7784 flow. Second operand has 39 states, 39 states have (on average 65.7948717948718) internal successors, (2566), 39 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:03:44,031 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:03:44,031 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 104 [2022-07-21 09:03:44,031 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:04:54,593 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 67 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)