./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i -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 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:03:00,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:03:00,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:03:00,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:03:00,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:03:00,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:03:00,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:03:00,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:03:00,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:03:00,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:03:00,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:03:00,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:03:00,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:03:00,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:03:00,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:03:00,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:03:00,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:03:00,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:03:00,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:03:00,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:03:00,872 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:03:00,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:03:00,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:03:00,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:03:00,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:03:00,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:03:00,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:03:00,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:03:00,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:03:00,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:03:00,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:03:00,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:03:00,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:03:00,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:03:00,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:03:00,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:03:00,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:03:00,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:03:00,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:03:00,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:03:00,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:03:00,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:03:00,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:03:00,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:03:00,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:03:00,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:03:00,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:03:00,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:03:00,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:03:00,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:03:00,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:03:00,930 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:03:00,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:03:00,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:03:00,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:03:00,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:03:00,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:03:00,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:03:00,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:03:00,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:03:00,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:03:00,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:03:00,933 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:03:00,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:03:00,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:03:00,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:03:00,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:03:00,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:03:00,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:03:00,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:03:00,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:03:00,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:03:00,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:03:00,936 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:03:00,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:03:00,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:03:00,937 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a0803bc25bdee4cec741e6286f7294c3704d91bb65e5684830693d517eafafb [2022-07-19 21:03:01,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:03:01,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:03:01,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:03:01,186 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:03:01,187 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:03:01,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-19 21:03:01,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106127600/bda9ad3084d54c779e7cbce189be1acf/FLAG9d898c49a [2022-07-19 21:03:01,672 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:03:01,673 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/12_fmaxsymopt_cas.i [2022-07-19 21:03:01,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106127600/bda9ad3084d54c779e7cbce189be1acf/FLAG9d898c49a [2022-07-19 21:03:02,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/106127600/bda9ad3084d54c779e7cbce189be1acf [2022-07-19 21:03:02,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:03:02,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:03:02,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:03:02,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:03:02,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:03:02,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aa07af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02, skipping insertion in model container [2022-07-19 21:03:02,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:03:02,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:03:02,364 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/pthread-ext/12_fmaxsymopt_cas.i[30582,30595] [2022-07-19 21:03:02,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:03:02,391 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:03:02,451 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/pthread-ext/12_fmaxsymopt_cas.i[30582,30595] [2022-07-19 21:03:02,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:03:02,500 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:03:02,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02 WrapperNode [2022-07-19 21:03:02,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:03:02,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:03:02,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:03:02,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:03:02,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,566 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 101 [2022-07-19 21:03:02,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:03:02,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:03:02,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:03:02,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:03:02,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:03:02,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:03:02,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:03:02,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:03:02,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (1/1) ... [2022-07-19 21:03:02,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:03:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:03:02,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:03:02,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:03:02,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:03:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:03:02,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:03:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:03:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:03:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:03:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:03:02,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:03:02,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:03:02,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:03:02,671 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:03:02,759 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:03:02,760 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:03:02,999 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:03:03,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:03:03,040 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:03:03,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:03:03 BoogieIcfgContainer [2022-07-19 21:03:03,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:03:03,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:03:03,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:03:03,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:03:03,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:03:02" (1/3) ... [2022-07-19 21:03:03,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcba98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:03:03, skipping insertion in model container [2022-07-19 21:03:03,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:03:02" (2/3) ... [2022-07-19 21:03:03,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dcba98b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:03:03, skipping insertion in model container [2022-07-19 21:03:03,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:03:03" (3/3) ... [2022-07-19 21:03:03,049 INFO L111 eAbstractionObserver]: Analyzing ICFG 12_fmaxsymopt_cas.i [2022-07-19 21:03:03,054 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:03:03,062 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:03:03,062 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:03:03,062 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:03:03,113 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:03,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 102 transitions, 209 flow [2022-07-19 21:03:03,204 INFO L129 PetriNetUnfolder]: 12/113 cut-off events. [2022-07-19 21:03:03,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:03:03,209 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 12/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2022-07-19 21:03:03,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 102 transitions, 209 flow [2022-07-19 21:03:03,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 102 transitions, 209 flow [2022-07-19 21:03:03,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:03,232 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:03,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:03:03,251 INFO L129 PetriNetUnfolder]: 2/53 cut-off events. [2022-07-19 21:03:03,252 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:03:03,252 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:03,253 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:03:03,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 21:03:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:03,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1635953085, now seen corresponding path program 1 times [2022-07-19 21:03:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:03,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755569178] [2022-07-19 21:03:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:03,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:03,403 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:03,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:03,485 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:03,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-07-19 21:03:03,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-07-19 21:03:03,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-07-19 21:03:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:03:03,489 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:03:03,499 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:03,500 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:03:03,548 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:03,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 150 places, 166 transitions, 344 flow [2022-07-19 21:03:03,589 INFO L129 PetriNetUnfolder]: 23/190 cut-off events. [2022-07-19 21:03:03,589 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:03:03,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 190 events. 23/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 408 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2022-07-19 21:03:03,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 166 transitions, 344 flow [2022-07-19 21:03:03,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 166 transitions, 344 flow [2022-07-19 21:03:03,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:03,596 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:03,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:03:03,620 INFO L129 PetriNetUnfolder]: 4/85 cut-off events. [2022-07-19 21:03:03,625 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:03:03,626 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:03,626 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:03:03,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-07-19 21:03:03,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -32075274, now seen corresponding path program 1 times [2022-07-19 21:03:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676526246] [2022-07-19 21:03:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:03,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:03,676 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:03,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:03,717 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:03,718 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:03:03,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:03:03,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-07-19 21:03:03,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:03:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:03:03,719 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:03:03,722 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:03,723 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:03:03,794 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:03,804 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 206 places, 230 transitions, 481 flow [2022-07-19 21:03:03,857 INFO L129 PetriNetUnfolder]: 34/267 cut-off events. [2022-07-19 21:03:03,857 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:03:03,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 267 events. 34/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 750 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 202. Up to 8 conditions per place. [2022-07-19 21:03:03,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 230 transitions, 481 flow [2022-07-19 21:03:03,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 230 transitions, 481 flow [2022-07-19 21:03:03,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:03,879 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:03,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:03:03,907 INFO L129 PetriNetUnfolder]: 8/125 cut-off events. [2022-07-19 21:03:03,907 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:03:03,907 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:03,908 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:03,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-07-19 21:03:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1459620510, now seen corresponding path program 1 times [2022-07-19 21:03:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450314273] [2022-07-19 21:03:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:03,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:03,975 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:04,002 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:04,003 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:04,003 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:03:04,003 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:03:04,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-07-19 21:03:04,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:03:04,004 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:03:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:03:04,005 INFO L356 BasicCegarLoop]: Path program histogram: [1] [2022-07-19 21:03:04,005 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:04,006 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:03:04,071 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:04,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 262 places, 294 transitions, 620 flow [2022-07-19 21:03:04,139 INFO L129 PetriNetUnfolder]: 45/344 cut-off events. [2022-07-19 21:03:04,139 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-19 21:03:04,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 344 events. 45/344 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1120 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 275. Up to 10 conditions per place. [2022-07-19 21:03:04,147 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 294 transitions, 620 flow [2022-07-19 21:03:04,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 294 transitions, 620 flow [2022-07-19 21:03:04,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:04,159 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:04,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:03:04,202 INFO L129 PetriNetUnfolder]: 14/175 cut-off events. [2022-07-19 21:03:04,203 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:03:04,203 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:04,203 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] [2022-07-19 21:03:04,204 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:03:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:04,204 INFO L85 PathProgramCache]: Analyzing trace with hash 688159959, now seen corresponding path program 1 times [2022-07-19 21:03:04,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:04,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990907924] [2022-07-19 21:03:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:04,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:04,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:04,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990907924] [2022-07-19 21:03:04,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990907924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:04,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:04,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:03:04,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867355153] [2022-07-19 21:03:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:04,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:03:04,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:03:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:03:04,388 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 294 [2022-07-19 21:03:04,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 294 transitions, 620 flow. Second operand has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:04,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:04,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 294 [2022-07-19 21:03:04,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:04,662 INFO L129 PetriNetUnfolder]: 109/1030 cut-off events. [2022-07-19 21:03:04,663 INFO L130 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-07-19 21:03:04,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 1030 events. 109/1030 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5900 event pairs, 34 based on Foata normal form. 188/1102 useless extension candidates. Maximal degree in co-relation 539. Up to 65 conditions per place. [2022-07-19 21:03:04,686 INFO L132 encePairwiseOnDemand]: 272/294 looper letters, 8 selfloop transitions, 0 changer transitions 0/263 dead transitions. [2022-07-19 21:03:04,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 263 transitions, 574 flow [2022-07-19 21:03:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:03:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:03:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 550 transitions. [2022-07-19 21:03:04,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.935374149659864 [2022-07-19 21:03:04,706 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 550 transitions. [2022-07-19 21:03:04,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 550 transitions. [2022-07-19 21:03:04,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:04,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 550 transitions. [2022-07-19 21:03:04,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 275.0) internal successors, (550), 2 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:04,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:04,727 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:04,728 INFO L186 Difference]: Start difference. First operand has 262 places, 294 transitions, 620 flow. Second operand 2 states and 550 transitions. [2022-07-19 21:03:04,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 263 transitions, 574 flow [2022-07-19 21:03:04,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 263 transitions, 562 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:04,745 INFO L242 Difference]: Finished difference. Result has 253 places, 263 transitions, 546 flow [2022-07-19 21:03:04,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=546, PETRI_PLACES=253, PETRI_TRANSITIONS=263} [2022-07-19 21:03:04,755 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -9 predicate places. [2022-07-19 21:03:04,756 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 263 transitions, 546 flow [2022-07-19 21:03:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 261.0) internal successors, (522), 2 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:04,756 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:04,757 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] [2022-07-19 21:03:04,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:03:04,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:03:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 833454973, now seen corresponding path program 1 times [2022-07-19 21:03:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:04,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102026995] [2022-07-19 21:03:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:04,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:04,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102026995] [2022-07-19 21:03:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102026995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:04,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:04,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591757503] [2022-07-19 21:03:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:04,850 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 294 [2022-07-19 21:03:04,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 263 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:04,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:04,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 294 [2022-07-19 21:03:04,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:05,720 INFO L129 PetriNetUnfolder]: 687/3642 cut-off events. [2022-07-19 21:03:05,720 INFO L130 PetriNetUnfolder]: For 379/379 co-relation queries the response was YES. [2022-07-19 21:03:05,761 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4781 conditions, 3642 events. 687/3642 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 32395 event pairs, 250 based on Foata normal form. 0/3113 useless extension candidates. Maximal degree in co-relation 4774. Up to 439 conditions per place. [2022-07-19 21:03:05,792 INFO L132 encePairwiseOnDemand]: 290/294 looper letters, 29 selfloop transitions, 3 changer transitions 0/274 dead transitions. [2022-07-19 21:03:05,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 274 transitions, 647 flow [2022-07-19 21:03:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 774 transitions. [2022-07-19 21:03:05,795 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8775510204081632 [2022-07-19 21:03:05,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 774 transitions. [2022-07-19 21:03:05,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 774 transitions. [2022-07-19 21:03:05,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:05,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 774 transitions. [2022-07-19 21:03:05,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:05,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:05,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:05,801 INFO L186 Difference]: Start difference. First operand has 253 places, 263 transitions, 546 flow. Second operand 3 states and 774 transitions. [2022-07-19 21:03:05,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 274 transitions, 647 flow [2022-07-19 21:03:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 274 transitions, 647 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:05,807 INFO L242 Difference]: Finished difference. Result has 256 places, 263 transitions, 557 flow [2022-07-19 21:03:05,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=557, PETRI_PLACES=256, PETRI_TRANSITIONS=263} [2022-07-19 21:03:05,809 INFO L279 CegarLoopForPetriNet]: 262 programPoint places, -6 predicate places. [2022-07-19 21:03:05,809 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 263 transitions, 557 flow [2022-07-19 21:03:05,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:05,810 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:05,810 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:05,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:03:05,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-07-19 21:03:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash 908884319, now seen corresponding path program 1 times [2022-07-19 21:03:05,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:05,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100619868] [2022-07-19 21:03:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:05,830 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:05,850 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:05,850 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:05,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-19 21:03:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-19 21:03:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-07-19 21:03:05,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-19 21:03:05,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-19 21:03:05,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-19 21:03:05,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:03:05,852 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:03:05,853 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:05,853 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:03:05,914 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:05,917 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 318 places, 358 transitions, 761 flow [2022-07-19 21:03:06,027 INFO L129 PetriNetUnfolder]: 56/421 cut-off events. [2022-07-19 21:03:06,028 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-19 21:03:06,038 INFO L84 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 421 events. 56/421 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1511 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 357. Up to 12 conditions per place. [2022-07-19 21:03:06,038 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 358 transitions, 761 flow [2022-07-19 21:03:06,045 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 358 transitions, 761 flow [2022-07-19 21:03:06,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:06,047 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:06,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:03:06,064 INFO L129 PetriNetUnfolder]: 14/170 cut-off events. [2022-07-19 21:03:06,065 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:03:06,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:06,065 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] [2022-07-19 21:03:06,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash -492306787, now seen corresponding path program 1 times [2022-07-19 21:03:06,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:06,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685236514] [2022-07-19 21:03:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:06,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:06,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:06,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685236514] [2022-07-19 21:03:06,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685236514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:06,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:06,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:03:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484918307] [2022-07-19 21:03:06,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:06,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:03:06,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:03:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:03:06,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 358 [2022-07-19 21:03:06,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 358 transitions, 761 flow. Second operand has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:06,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:06,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 358 [2022-07-19 21:03:06,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:06,641 INFO L129 PetriNetUnfolder]: 253/2126 cut-off events. [2022-07-19 21:03:06,642 INFO L130 PetriNetUnfolder]: For 511/511 co-relation queries the response was YES. [2022-07-19 21:03:06,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 2126 events. 253/2126 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 15367 event pairs, 98 based on Foata normal form. 492/2376 useless extension candidates. Maximal degree in co-relation 1191. Up to 161 conditions per place. [2022-07-19 21:03:06,693 INFO L132 encePairwiseOnDemand]: 331/358 looper letters, 10 selfloop transitions, 0 changer transitions 0/321 dead transitions. [2022-07-19 21:03:06,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 321 transitions, 707 flow [2022-07-19 21:03:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:03:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:03:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2022-07-19 21:03:06,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9343575418994413 [2022-07-19 21:03:06,696 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2022-07-19 21:03:06,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2022-07-19 21:03:06,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:06,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2022-07-19 21:03:06,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:06,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:06,700 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:06,700 INFO L186 Difference]: Start difference. First operand has 318 places, 358 transitions, 761 flow. Second operand 2 states and 669 transitions. [2022-07-19 21:03:06,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 321 transitions, 707 flow [2022-07-19 21:03:06,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 321 transitions, 687 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:06,708 INFO L242 Difference]: Finished difference. Result has 308 places, 321 transitions, 667 flow [2022-07-19 21:03:06,708 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=667, PETRI_PLACES=308, PETRI_TRANSITIONS=321} [2022-07-19 21:03:06,710 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -10 predicate places. [2022-07-19 21:03:06,710 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 321 transitions, 667 flow [2022-07-19 21:03:06,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 317.0) internal successors, (634), 2 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:06,711 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:06,711 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] [2022-07-19 21:03:06,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:03:06,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:06,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1429904641, now seen corresponding path program 1 times [2022-07-19 21:03:06,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:06,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499853858] [2022-07-19 21:03:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:06,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:06,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499853858] [2022-07-19 21:03:06,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499853858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:06,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:06,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295091342] [2022-07-19 21:03:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:06,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:06,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-19 21:03:06,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 321 transitions, 667 flow. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:06,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:06,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-19 21:03:06,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:09,015 INFO L129 PetriNetUnfolder]: 1833/9586 cut-off events. [2022-07-19 21:03:09,016 INFO L130 PetriNetUnfolder]: For 811/811 co-relation queries the response was YES. [2022-07-19 21:03:09,134 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12242 conditions, 9586 events. 1833/9586 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 104876 event pairs, 674 based on Foata normal form. 0/8263 useless extension candidates. Maximal degree in co-relation 12234. Up to 1071 conditions per place. [2022-07-19 21:03:09,230 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 33 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-19 21:03:09,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 334 transitions, 785 flow [2022-07-19 21:03:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 946 transitions. [2022-07-19 21:03:09,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8808193668528864 [2022-07-19 21:03:09,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 946 transitions. [2022-07-19 21:03:09,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 946 transitions. [2022-07-19 21:03:09,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:09,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 946 transitions. [2022-07-19 21:03:09,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:09,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:09,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:09,241 INFO L186 Difference]: Start difference. First operand has 308 places, 321 transitions, 667 flow. Second operand 3 states and 946 transitions. [2022-07-19 21:03:09,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 334 transitions, 785 flow [2022-07-19 21:03:09,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 334 transitions, 785 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:09,247 INFO L242 Difference]: Finished difference. Result has 311 places, 321 transitions, 678 flow [2022-07-19 21:03:09,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=678, PETRI_PLACES=311, PETRI_TRANSITIONS=321} [2022-07-19 21:03:09,248 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -7 predicate places. [2022-07-19 21:03:09,249 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 321 transitions, 678 flow [2022-07-19 21:03:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:09,250 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:09,250 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] [2022-07-19 21:03:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:03:09,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1487906071, now seen corresponding path program 1 times [2022-07-19 21:03:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:09,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881447267] [2022-07-19 21:03:09,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:09,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:09,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881447267] [2022-07-19 21:03:09,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881447267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:09,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:09,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553902990] [2022-07-19 21:03:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:09,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:09,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:09,288 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 358 [2022-07-19 21:03:09,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 321 transitions, 678 flow. Second operand has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:09,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:09,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 358 [2022-07-19 21:03:09,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:10,964 INFO L129 PetriNetUnfolder]: 1379/7043 cut-off events. [2022-07-19 21:03:10,965 INFO L130 PetriNetUnfolder]: For 755/755 co-relation queries the response was YES. [2022-07-19 21:03:11,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 7043 events. 1379/7043 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 72084 event pairs, 610 based on Foata normal form. 0/6177 useless extension candidates. Maximal degree in co-relation 9275. Up to 952 conditions per place. [2022-07-19 21:03:11,094 INFO L132 encePairwiseOnDemand]: 355/358 looper letters, 29 selfloop transitions, 2 changer transitions 0/333 dead transitions. [2022-07-19 21:03:11,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 333 transitions, 784 flow [2022-07-19 21:03:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 953 transitions. [2022-07-19 21:03:11,100 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8873370577281192 [2022-07-19 21:03:11,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 953 transitions. [2022-07-19 21:03:11,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 953 transitions. [2022-07-19 21:03:11,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:11,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 953 transitions. [2022-07-19 21:03:11,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:11,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:11,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:11,107 INFO L186 Difference]: Start difference. First operand has 311 places, 321 transitions, 678 flow. Second operand 3 states and 953 transitions. [2022-07-19 21:03:11,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 333 transitions, 784 flow [2022-07-19 21:03:11,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 333 transitions, 781 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:11,114 INFO L242 Difference]: Finished difference. Result has 313 places, 322 transitions, 687 flow [2022-07-19 21:03:11,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=687, PETRI_PLACES=313, PETRI_TRANSITIONS=322} [2022-07-19 21:03:11,117 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -5 predicate places. [2022-07-19 21:03:11,117 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 322 transitions, 687 flow [2022-07-19 21:03:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.0) internal successors, (927), 3 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:11,118 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:11,119 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:03:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:03:11,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1969543966, now seen corresponding path program 1 times [2022-07-19 21:03:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292709326] [2022-07-19 21:03:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:11,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:03:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292709326] [2022-07-19 21:03:11,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292709326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:11,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:11,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442550402] [2022-07-19 21:03:11,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:11,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:11,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:11,175 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 358 [2022-07-19 21:03:11,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 322 transitions, 687 flow. Second operand has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:11,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:11,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 358 [2022-07-19 21:03:11,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:13,077 INFO L129 PetriNetUnfolder]: 1847/9295 cut-off events. [2022-07-19 21:03:13,077 INFO L130 PetriNetUnfolder]: For 764/764 co-relation queries the response was YES. [2022-07-19 21:03:13,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 9295 events. 1847/9295 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 98815 event pairs, 755 based on Foata normal form. 0/8015 useless extension candidates. Maximal degree in co-relation 11977. Up to 1044 conditions per place. [2022-07-19 21:03:13,315 INFO L132 encePairwiseOnDemand]: 354/358 looper letters, 32 selfloop transitions, 3 changer transitions 0/334 dead transitions. [2022-07-19 21:03:13,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 334 transitions, 796 flow [2022-07-19 21:03:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 945 transitions. [2022-07-19 21:03:13,319 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8798882681564246 [2022-07-19 21:03:13,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 945 transitions. [2022-07-19 21:03:13,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 945 transitions. [2022-07-19 21:03:13,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:13,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 945 transitions. [2022-07-19 21:03:13,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:13,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:13,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:13,325 INFO L186 Difference]: Start difference. First operand has 313 places, 322 transitions, 687 flow. Second operand 3 states and 945 transitions. [2022-07-19 21:03:13,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 334 transitions, 796 flow [2022-07-19 21:03:13,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 334 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:13,332 INFO L242 Difference]: Finished difference. Result has 315 places, 322 transitions, 696 flow [2022-07-19 21:03:13,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=696, PETRI_PLACES=315, PETRI_TRANSITIONS=322} [2022-07-19 21:03:13,335 INFO L279 CegarLoopForPetriNet]: 318 programPoint places, -3 predicate places. [2022-07-19 21:03:13,335 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 322 transitions, 696 flow [2022-07-19 21:03:13,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.6666666666667) internal successors, (917), 3 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:13,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:13,336 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:13,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:03:13,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-19 21:03:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2049506815, now seen corresponding path program 1 times [2022-07-19 21:03:13,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:13,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2897636] [2022-07-19 21:03:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:13,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:13,362 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:13,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:13,402 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:13,403 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-07-19 21:03:13,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-19 21:03:13,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-19 21:03:13,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-19 21:03:13,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-07-19 21:03:13,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-19 21:03:13,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-19 21:03:13,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:03:13,404 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:03:13,406 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:13,406 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:03:13,468 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:13,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 374 places, 422 transitions, 904 flow [2022-07-19 21:03:13,555 INFO L129 PetriNetUnfolder]: 67/498 cut-off events. [2022-07-19 21:03:13,556 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-19 21:03:13,569 INFO L84 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 498 events. 67/498 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1888 event pairs, 0 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 440. Up to 14 conditions per place. [2022-07-19 21:03:13,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 422 transitions, 904 flow [2022-07-19 21:03:13,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 422 transitions, 904 flow [2022-07-19 21:03:13,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:13,586 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:13,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-19 21:03:13,600 INFO L129 PetriNetUnfolder]: 13/168 cut-off events. [2022-07-19 21:03:13,601 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:03:13,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:13,601 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] [2022-07-19 21:03:13,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:13,602 INFO L85 PathProgramCache]: Analyzing trace with hash 503615203, now seen corresponding path program 1 times [2022-07-19 21:03:13,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:13,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801405238] [2022-07-19 21:03:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:13,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:13,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801405238] [2022-07-19 21:03:13,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801405238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:13,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:13,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:03:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293638966] [2022-07-19 21:03:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:13,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:03:13,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:03:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:03:13,644 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 372 out of 422 [2022-07-19 21:03:13,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 422 transitions, 904 flow. Second operand has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:13,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:13,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 372 of 422 [2022-07-19 21:03:13,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:14,753 INFO L129 PetriNetUnfolder]: 573/4350 cut-off events. [2022-07-19 21:03:14,753 INFO L130 PetriNetUnfolder]: For 1503/1503 co-relation queries the response was YES. [2022-07-19 21:03:14,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5318 conditions, 4350 events. 573/4350 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 38090 event pairs, 258 based on Foata normal form. 1228/5084 useless extension candidates. Maximal degree in co-relation 2551. Up to 385 conditions per place. [2022-07-19 21:03:14,858 INFO L132 encePairwiseOnDemand]: 390/422 looper letters, 12 selfloop transitions, 0 changer transitions 0/379 dead transitions. [2022-07-19 21:03:14,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 379 transitions, 842 flow [2022-07-19 21:03:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:03:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:03:14,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 788 transitions. [2022-07-19 21:03:14,861 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.933649289099526 [2022-07-19 21:03:14,861 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 788 transitions. [2022-07-19 21:03:14,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 788 transitions. [2022-07-19 21:03:14,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:14,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 788 transitions. [2022-07-19 21:03:14,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 394.0) internal successors, (788), 2 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:14,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:14,867 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:14,867 INFO L186 Difference]: Start difference. First operand has 374 places, 422 transitions, 904 flow. Second operand 2 states and 788 transitions. [2022-07-19 21:03:14,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 379 transitions, 842 flow [2022-07-19 21:03:14,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 379 transitions, 812 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:14,875 INFO L242 Difference]: Finished difference. Result has 363 places, 379 transitions, 788 flow [2022-07-19 21:03:14,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=788, PETRI_PLACES=363, PETRI_TRANSITIONS=379} [2022-07-19 21:03:14,877 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -11 predicate places. [2022-07-19 21:03:14,877 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 379 transitions, 788 flow [2022-07-19 21:03:14,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 373.5) internal successors, (747), 2 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:14,878 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:14,878 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] [2022-07-19 21:03:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:03:14,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash 266410080, now seen corresponding path program 1 times [2022-07-19 21:03:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:14,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620779716] [2022-07-19 21:03:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620779716] [2022-07-19 21:03:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620779716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:14,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448569402] [2022-07-19 21:03:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:14,908 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-19 21:03:14,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 379 transitions, 788 flow. Second operand has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:14,909 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:14,909 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-19 21:03:14,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:20,356 INFO L129 PetriNetUnfolder]: 4491/22742 cut-off events. [2022-07-19 21:03:20,356 INFO L130 PetriNetUnfolder]: For 1675/1675 co-relation queries the response was YES. [2022-07-19 21:03:20,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 22742 events. 4491/22742 cut-off events. For 1675/1675 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 287776 event pairs, 1698 based on Foata normal form. 0/19731 useless extension candidates. Maximal degree in co-relation 28710. Up to 2511 conditions per place. [2022-07-19 21:03:21,168 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 37 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-19 21:03:21,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 394 transitions, 923 flow [2022-07-19 21:03:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1118 transitions. [2022-07-19 21:03:21,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8830963665086888 [2022-07-19 21:03:21,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1118 transitions. [2022-07-19 21:03:21,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1118 transitions. [2022-07-19 21:03:21,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:21,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1118 transitions. [2022-07-19 21:03:21,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.6666666666667) internal successors, (1118), 3 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:21,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:21,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:21,178 INFO L186 Difference]: Start difference. First operand has 363 places, 379 transitions, 788 flow. Second operand 3 states and 1118 transitions. [2022-07-19 21:03:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 394 transitions, 923 flow [2022-07-19 21:03:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 394 transitions, 923 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:03:21,192 INFO L242 Difference]: Finished difference. Result has 366 places, 379 transitions, 799 flow [2022-07-19 21:03:21,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=799, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2022-07-19 21:03:21,193 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -8 predicate places. [2022-07-19 21:03:21,194 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 799 flow [2022-07-19 21:03:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:21,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:21,194 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] [2022-07-19 21:03:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:03:21,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1160838450, now seen corresponding path program 1 times [2022-07-19 21:03:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:21,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914621560] [2022-07-19 21:03:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:21,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:21,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914621560] [2022-07-19 21:03:21,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914621560] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:21,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:21,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940314584] [2022-07-19 21:03:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:21,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:21,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-19 21:03:21,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 799 flow. Second operand has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:21,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:21,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-19 21:03:21,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:25,139 INFO L129 PetriNetUnfolder]: 3439/17495 cut-off events. [2022-07-19 21:03:25,139 INFO L130 PetriNetUnfolder]: For 1523/1523 co-relation queries the response was YES. [2022-07-19 21:03:25,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22442 conditions, 17495 events. 3439/17495 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 210472 event pairs, 1538 based on Foata normal form. 0/15417 useless extension candidates. Maximal degree in co-relation 22431. Up to 2232 conditions per place. [2022-07-19 21:03:25,624 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 33 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-19 21:03:25,624 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 393 transitions, 922 flow [2022-07-19 21:03:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1125 transitions. [2022-07-19 21:03:25,627 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8886255924170616 [2022-07-19 21:03:25,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1125 transitions. [2022-07-19 21:03:25,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1125 transitions. [2022-07-19 21:03:25,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:25,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1125 transitions. [2022-07-19 21:03:25,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:25,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:25,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:25,633 INFO L186 Difference]: Start difference. First operand has 366 places, 379 transitions, 799 flow. Second operand 3 states and 1125 transitions. [2022-07-19 21:03:25,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 393 transitions, 922 flow [2022-07-19 21:03:25,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 393 transitions, 919 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:25,645 INFO L242 Difference]: Finished difference. Result has 368 places, 380 transitions, 808 flow [2022-07-19 21:03:25,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=808, PETRI_PLACES=368, PETRI_TRANSITIONS=380} [2022-07-19 21:03:25,647 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -6 predicate places. [2022-07-19 21:03:25,647 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 380 transitions, 808 flow [2022-07-19 21:03:25,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.0) internal successors, (1095), 3 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:25,648 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:25,648 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:03:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:03:25,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:25,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1848432253, now seen corresponding path program 1 times [2022-07-19 21:03:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:25,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231923184] [2022-07-19 21:03:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:25,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:03:25,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231923184] [2022-07-19 21:03:25,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231923184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:25,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:25,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257417546] [2022-07-19 21:03:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:25,678 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-19 21:03:25,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 380 transitions, 808 flow. Second operand has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:25,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:25,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-19 21:03:25,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:30,556 INFO L129 PetriNetUnfolder]: 4229/19775 cut-off events. [2022-07-19 21:03:30,556 INFO L130 PetriNetUnfolder]: For 1628/1628 co-relation queries the response was YES. [2022-07-19 21:03:31,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25658 conditions, 19775 events. 4229/19775 cut-off events. For 1628/1628 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 242336 event pairs, 1689 based on Foata normal form. 0/17105 useless extension candidates. Maximal degree in co-relation 25646. Up to 2484 conditions per place. [2022-07-19 21:03:31,283 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 36 selfloop transitions, 3 changer transitions 0/394 dead transitions. [2022-07-19 21:03:31,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 394 transitions, 934 flow [2022-07-19 21:03:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1117 transitions. [2022-07-19 21:03:31,285 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882306477093207 [2022-07-19 21:03:31,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1117 transitions. [2022-07-19 21:03:31,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1117 transitions. [2022-07-19 21:03:31,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:31,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1117 transitions. [2022-07-19 21:03:31,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.3333333333333) internal successors, (1117), 3 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:31,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:31,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:31,293 INFO L186 Difference]: Start difference. First operand has 368 places, 380 transitions, 808 flow. Second operand 3 states and 1117 transitions. [2022-07-19 21:03:31,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 394 transitions, 934 flow [2022-07-19 21:03:31,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 394 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:31,300 INFO L242 Difference]: Finished difference. Result has 370 places, 380 transitions, 817 flow [2022-07-19 21:03:31,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=817, PETRI_PLACES=370, PETRI_TRANSITIONS=380} [2022-07-19 21:03:31,302 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -4 predicate places. [2022-07-19 21:03:31,302 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 380 transitions, 817 flow [2022-07-19 21:03:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:31,303 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:31,303 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-19 21:03:31,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:03:31,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1553265593, now seen corresponding path program 1 times [2022-07-19 21:03:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:31,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052081399] [2022-07-19 21:03:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:03:31,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:31,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052081399] [2022-07-19 21:03:31,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052081399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:31,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:31,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078055581] [2022-07-19 21:03:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:31,336 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 422 [2022-07-19 21:03:31,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 380 transitions, 817 flow. Second operand has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:31,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:31,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 422 [2022-07-19 21:03:31,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:35,024 INFO L129 PetriNetUnfolder]: 3197/14565 cut-off events. [2022-07-19 21:03:35,024 INFO L130 PetriNetUnfolder]: For 1515/1515 co-relation queries the response was YES. [2022-07-19 21:03:35,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19492 conditions, 14565 events. 3197/14565 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 169203 event pairs, 1530 based on Foata normal form. 0/12810 useless extension candidates. Maximal degree in co-relation 19479. Up to 2215 conditions per place. [2022-07-19 21:03:35,472 INFO L132 encePairwiseOnDemand]: 419/422 looper letters, 32 selfloop transitions, 2 changer transitions 0/393 dead transitions. [2022-07-19 21:03:35,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 393 transitions, 931 flow [2022-07-19 21:03:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-07-19 21:03:35,475 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8878357030015798 [2022-07-19 21:03:35,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-07-19 21:03:35,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-07-19 21:03:35,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:35,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-07-19 21:03:35,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:35,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:35,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:35,482 INFO L186 Difference]: Start difference. First operand has 370 places, 380 transitions, 817 flow. Second operand 3 states and 1124 transitions. [2022-07-19 21:03:35,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 393 transitions, 931 flow [2022-07-19 21:03:35,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 393 transitions, 928 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:35,494 INFO L242 Difference]: Finished difference. Result has 372 places, 381 transitions, 826 flow [2022-07-19 21:03:35,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=826, PETRI_PLACES=372, PETRI_TRANSITIONS=381} [2022-07-19 21:03:35,495 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, -2 predicate places. [2022-07-19 21:03:35,495 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 381 transitions, 826 flow [2022-07-19 21:03:35,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 365.3333333333333) internal successors, (1096), 3 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:35,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:35,496 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] [2022-07-19 21:03:35,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 21:03:35,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash 431457669, now seen corresponding path program 1 times [2022-07-19 21:03:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:35,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816590069] [2022-07-19 21:03:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:35,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816590069] [2022-07-19 21:03:35,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816590069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:03:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044227643] [2022-07-19 21:03:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:35,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:03:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:03:35,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:03:35,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:03:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 21:03:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:03:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:35,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:03:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:35,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044227643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:03:35,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:03:35,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-07-19 21:03:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813294287] [2022-07-19 21:03:35,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:03:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:03:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:03:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:03:35,857 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 422 [2022-07-19 21:03:35,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 381 transitions, 826 flow. Second operand has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:35,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:35,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 422 [2022-07-19 21:03:35,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:39,578 INFO L129 PetriNetUnfolder]: 3613/14085 cut-off events. [2022-07-19 21:03:39,578 INFO L130 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2022-07-19 21:03:39,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20200 conditions, 14085 events. 3613/14085 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 158563 event pairs, 1218 based on Foata normal form. 63/12466 useless extension candidates. Maximal degree in co-relation 20186. Up to 1723 conditions per place. [2022-07-19 21:03:40,056 INFO L132 encePairwiseOnDemand]: 416/422 looper letters, 62 selfloop transitions, 6 changer transitions 0/426 dead transitions. [2022-07-19 21:03:40,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 426 transitions, 1152 flow [2022-07-19 21:03:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:03:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:03:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2241 transitions. [2022-07-19 21:03:40,062 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8850710900473934 [2022-07-19 21:03:40,062 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2241 transitions. [2022-07-19 21:03:40,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2241 transitions. [2022-07-19 21:03:40,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:40,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2241 transitions. [2022-07-19 21:03:40,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 373.5) internal successors, (2241), 6 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:40,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:40,074 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:40,074 INFO L186 Difference]: Start difference. First operand has 372 places, 381 transitions, 826 flow. Second operand 6 states and 2241 transitions. [2022-07-19 21:03:40,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 426 transitions, 1152 flow [2022-07-19 21:03:40,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 426 transitions, 1150 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:40,084 INFO L242 Difference]: Finished difference. Result has 380 places, 384 transitions, 860 flow [2022-07-19 21:03:40,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=380, PETRI_TRANSITIONS=384} [2022-07-19 21:03:40,086 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 6 predicate places. [2022-07-19 21:03:40,086 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 384 transitions, 860 flow [2022-07-19 21:03:40,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 364.2) internal successors, (1821), 5 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:40,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:40,087 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-07-19 21:03:40,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:03:40,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 21:03:40,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:40,304 INFO L85 PathProgramCache]: Analyzing trace with hash -805755012, now seen corresponding path program 1 times [2022-07-19 21:03:40,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:40,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699323479] [2022-07-19 21:03:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:40,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 21:03:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699323479] [2022-07-19 21:03:40,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699323479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:40,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:40,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:03:40,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820826512] [2022-07-19 21:03:40,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:40,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:03:40,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:03:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:03:40,340 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 422 [2022-07-19 21:03:40,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 384 transitions, 860 flow. Second operand has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:40,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:40,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 422 [2022-07-19 21:03:40,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:03:46,236 INFO L129 PetriNetUnfolder]: 4556/21174 cut-off events. [2022-07-19 21:03:46,236 INFO L130 PetriNetUnfolder]: For 1540/1540 co-relation queries the response was YES. [2022-07-19 21:03:46,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27367 conditions, 21174 events. 4556/21174 cut-off events. For 1540/1540 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 256339 event pairs, 2037 based on Foata normal form. 0/18359 useless extension candidates. Maximal degree in co-relation 27350. Up to 2421 conditions per place. [2022-07-19 21:03:47,310 INFO L132 encePairwiseOnDemand]: 418/422 looper letters, 35 selfloop transitions, 3 changer transitions 0/397 dead transitions. [2022-07-19 21:03:47,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 397 transitions, 977 flow [2022-07-19 21:03:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:03:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:03:47,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2022-07-19 21:03:47,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8815165876777251 [2022-07-19 21:03:47,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2022-07-19 21:03:47,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2022-07-19 21:03:47,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:03:47,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2022-07-19 21:03:47,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:47,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:47,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:47,338 INFO L186 Difference]: Start difference. First operand has 380 places, 384 transitions, 860 flow. Second operand 3 states and 1116 transitions. [2022-07-19 21:03:47,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 397 transitions, 977 flow [2022-07-19 21:03:47,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 397 transitions, 973 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:03:47,346 INFO L242 Difference]: Finished difference. Result has 382 places, 384 transitions, 867 flow [2022-07-19 21:03:47,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=867, PETRI_PLACES=382, PETRI_TRANSITIONS=384} [2022-07-19 21:03:47,347 INFO L279 CegarLoopForPetriNet]: 374 programPoint places, 8 predicate places. [2022-07-19 21:03:47,348 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 384 transitions, 867 flow [2022-07-19 21:03:47,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:47,348 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:47,348 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:47,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:03:47,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-07-19 21:03:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash 137276488, now seen corresponding path program 1 times [2022-07-19 21:03:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:47,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100153213] [2022-07-19 21:03:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:47,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:47,369 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:03:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:03:47,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:03:47,393 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:03:47,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-07-19 21:03:47,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-07-19 21:03:47,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-07-19 21:03:47,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-07-19 21:03:47,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-07-19 21:03:47,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-07-19 21:03:47,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-07-19 21:03:47,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-07-19 21:03:47,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:03:47,396 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:03:47,397 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:03:47,397 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-19 21:03:47,459 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:03:47,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 430 places, 486 transitions, 1049 flow [2022-07-19 21:03:47,562 INFO L129 PetriNetUnfolder]: 78/575 cut-off events. [2022-07-19 21:03:47,562 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-07-19 21:03:47,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 575 events. 78/575 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2259 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 524. Up to 16 conditions per place. [2022-07-19 21:03:47,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 430 places, 486 transitions, 1049 flow [2022-07-19 21:03:47,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 430 places, 486 transitions, 1049 flow [2022-07-19 21:03:47,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:03:47,588 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@2cd8725e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d6a5a00 [2022-07-19 21:03:47,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-07-19 21:03:47,601 INFO L129 PetriNetUnfolder]: 13/172 cut-off events. [2022-07-19 21:03:47,601 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-19 21:03:47,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:03:47,601 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] [2022-07-19 21:03:47,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-07-19 21:03:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:03:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1647412281, now seen corresponding path program 1 times [2022-07-19 21:03:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:03:47,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374766526] [2022-07-19 21:03:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:03:47,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:03:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:03:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:03:47,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:03:47,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374766526] [2022-07-19 21:03:47,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374766526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:03:47,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:03:47,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:03:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714662005] [2022-07-19 21:03:47,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:03:47,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:03:47,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:03:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:03:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:03:47,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 486 [2022-07-19 21:03:47,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 486 transitions, 1049 flow. Second operand has 2 states, 2 states have (on average 429.0) internal successors, (858), 2 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:03:47,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:03:47,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 486 [2022-07-19 21:03:47,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand