./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/goblint-regression/28-race_reach_61-invariant_racing.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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:57:32,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:57:32,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:57:32,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:57:32,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:57:32,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:57:32,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:57:32,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:57:32,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:57:32,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:57:32,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:57:32,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:57:32,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:57:32,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:57:32,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:57:32,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:57:32,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:57:32,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:57:32,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:57:32,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:57:32,915 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:57:32,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:57:32,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:57:32,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:57:32,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:57:32,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:57:32,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:57:32,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:57:32,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:57:32,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:57:32,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:57:32,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:57:32,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:57:32,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:57:32,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:57:32,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:57:32,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:57:32,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:57:32,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:57:32,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:57:32,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:57:32,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:57:32,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:57:32,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:57:32,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:57:32,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:57:32,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:57:32,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:57:32,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:57:32,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:57:32,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:57:32,977 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:57:32,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:57:32,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:57:32,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:57:32,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:57:32,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:57:32,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:57:32,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:57:32,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:57:32,980 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:57:32,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:57:32,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:57:32,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:57:32,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:57:32,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:57:32,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:57:32,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:57:32,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:57:32,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:57:32,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:57:32,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:57:32,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:57:32,984 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:57:32,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:57:32,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:57:32,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-07-13 21:57:33,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:57:33,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:57:33,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:57:33,172 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:57:33,172 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:57:33,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-07-13 21:57:33,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1456593e/9a8037c4cafc4b5d92dde03b10f0c329/FLAGff5d7b54f [2022-07-13 21:57:33,616 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:57:33,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-07-13 21:57:33,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1456593e/9a8037c4cafc4b5d92dde03b10f0c329/FLAGff5d7b54f [2022-07-13 21:57:33,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1456593e/9a8037c4cafc4b5d92dde03b10f0c329 [2022-07-13 21:57:33,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:57:33,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:57:33,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:57:33,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:57:33,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:57:33,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:33,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9f01e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33, skipping insertion in model container [2022-07-13 21:57:33,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:33,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:57:33,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:57:33,923 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/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-07-13 21:57:33,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:57:33,943 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:57:33,963 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/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-07-13 21:57:33,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:57:33,992 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:57:33,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33 WrapperNode [2022-07-13 21:57:33,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:57:33,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:57:33,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:57:33,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:57:33,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,048 INFO L137 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-07-13 21:57:34,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:57:34,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:57:34,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:57:34,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:57:34,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:57:34,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:57:34,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:57:34,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:57:34,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (1/1) ... [2022-07-13 21:57:34,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:57:34,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:34,136 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) [2022-07-13 21:57:34,155 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 [2022-07-13 21:57:34,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:57:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:57:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:57:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:57:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:57:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:57:34,176 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:57:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:57:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:57:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:57:34,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:57:34,178 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:57:34,319 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:57:34,320 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:57:34,495 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:57:34,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:57:34,502 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-13 21:57:34,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:57:34 BoogieIcfgContainer [2022-07-13 21:57:34,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:57:34,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:57:34,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:57:34,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:57:34,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:57:33" (1/3) ... [2022-07-13 21:57:34,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166b7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:57:34, skipping insertion in model container [2022-07-13 21:57:34,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:57:33" (2/3) ... [2022-07-13 21:57:34,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166b7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:57:34, skipping insertion in model container [2022-07-13 21:57:34,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:57:34" (3/3) ... [2022-07-13 21:57:34,512 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-07-13 21:57:34,515 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:57:34,523 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:57:34,523 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:57:34,524 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:57:34,572 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:57:34,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 268 flow [2022-07-13 21:57:34,680 INFO L129 PetriNetUnfolder]: 30/188 cut-off events. [2022-07-13 21:57:34,680 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:34,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 565 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-07-13 21:57:34,688 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 130 transitions, 268 flow [2022-07-13 21:57:34,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 255 flow [2022-07-13 21:57:34,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:34,718 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:34,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:34,743 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-13 21:57:34,744 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:34,744 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:34,745 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] [2022-07-13 21:57:34,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:34,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1062996739, now seen corresponding path program 1 times [2022-07-13 21:57:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208345910] [2022-07-13 21:57:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:34,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:34,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208345910] [2022-07-13 21:57:34,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208345910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:34,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:34,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:34,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754356311] [2022-07-13 21:57:34,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:34,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:34,973 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 130 [2022-07-13 21:57:34,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 255 flow. Second operand has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:34,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:34,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 130 [2022-07-13 21:57:34,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:35,016 INFO L129 PetriNetUnfolder]: 1/153 cut-off events. [2022-07-13 21:57:35,016 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:35,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 153 events. 1/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 237 event pairs, 0 based on Foata normal form. 28/174 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2022-07-13 21:57:35,019 INFO L132 encePairwiseOnDemand]: 113/130 looper letters, 1 selfloop transitions, 0 changer transitions 0/107 dead transitions. [2022-07-13 21:57:35,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 221 flow [2022-07-13 21:57:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2022-07-13 21:57:35,031 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9153846153846154 [2022-07-13 21:57:35,032 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 238 transitions. [2022-07-13 21:57:35,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 238 transitions. [2022-07-13 21:57:35,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:35,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 238 transitions. [2022-07-13 21:57:35,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.0) internal successors, (238), 2 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,056 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,058 INFO L186 Difference]: Start difference. First operand has 110 places, 125 transitions, 255 flow. Second operand 2 states and 238 transitions. [2022-07-13 21:57:35,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 221 flow [2022-07-13 21:57:35,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 221 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:35,063 INFO L242 Difference]: Finished difference. Result has 110 places, 107 transitions, 219 flow [2022-07-13 21:57:35,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=219, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2022-07-13 21:57:35,069 INFO L279 CegarLoopForPetriNet]: 110 programPoint places, 0 predicate places. [2022-07-13 21:57:35,069 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 219 flow [2022-07-13 21:57:35,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,070 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:35,071 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] [2022-07-13 21:57:35,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:57:35,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:35,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1889734253, now seen corresponding path program 1 times [2022-07-13 21:57:35,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:35,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954076459] [2022-07-13 21:57:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:35,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:35,127 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:35,184 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:35,185 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:35,186 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:35,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:35,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:57:35,188 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:57:35,191 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:35,192 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:57:35,219 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:57:35,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-07-13 21:57:35,246 INFO L129 PetriNetUnfolder]: 51/304 cut-off events. [2022-07-13 21:57:35,247 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:57:35,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1043 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-07-13 21:57:35,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 163 transitions, 344 flow [2022-07-13 21:57:35,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 163 transitions, 344 flow [2022-07-13 21:57:35,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:35,256 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:35,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:35,263 INFO L129 PetriNetUnfolder]: 11/106 cut-off events. [2022-07-13 21:57:35,263 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:35,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:35,263 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] [2022-07-13 21:57:35,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash 613293600, now seen corresponding path program 1 times [2022-07-13 21:57:35,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:35,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728244729] [2022-07-13 21:57:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:35,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:35,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728244729] [2022-07-13 21:57:35,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728244729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:35,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:35,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346554793] [2022-07-13 21:57:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:35,300 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 163 [2022-07-13 21:57:35,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 344 flow. Second operand has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,300 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:35,300 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 163 [2022-07-13 21:57:35,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:35,326 INFO L129 PetriNetUnfolder]: 5/255 cut-off events. [2022-07-13 21:57:35,326 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-13 21:57:35,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 255 events. 5/255 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 60/303 useless extension candidates. Maximal degree in co-relation 162. Up to 7 conditions per place. [2022-07-13 21:57:35,328 INFO L132 encePairwiseOnDemand]: 140/163 looper letters, 4 selfloop transitions, 0 changer transitions 0/139 dead transitions. [2022-07-13 21:57:35,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 139 transitions, 304 flow [2022-07-13 21:57:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 297 transitions. [2022-07-13 21:57:35,330 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.911042944785276 [2022-07-13 21:57:35,330 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 297 transitions. [2022-07-13 21:57:35,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 297 transitions. [2022-07-13 21:57:35,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:35,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 297 transitions. [2022-07-13 21:57:35,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,346 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,347 INFO L186 Difference]: Start difference. First operand has 141 places, 163 transitions, 344 flow. Second operand 2 states and 297 transitions. [2022-07-13 21:57:35,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 139 transitions, 304 flow [2022-07-13 21:57:35,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 139 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:35,349 INFO L242 Difference]: Finished difference. Result has 141 places, 139 transitions, 296 flow [2022-07-13 21:57:35,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=296, PETRI_PLACES=141, PETRI_TRANSITIONS=139} [2022-07-13 21:57:35,350 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-13 21:57:35,350 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 139 transitions, 296 flow [2022-07-13 21:57:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 136.0) internal successors, (272), 2 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,351 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:35,351 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:35,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:57:35,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -348807653, now seen corresponding path program 1 times [2022-07-13 21:57:35,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:35,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41522603] [2022-07-13 21:57:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:35,372 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:35,390 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:35,392 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:35,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:35,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:57:35,394 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:57:35,394 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:35,395 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:57:35,414 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:57:35,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-07-13 21:57:35,450 INFO L129 PetriNetUnfolder]: 77/453 cut-off events. [2022-07-13 21:57:35,450 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-13 21:57:35,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1696 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-07-13 21:57:35,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 422 flow [2022-07-13 21:57:35,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 196 transitions, 422 flow [2022-07-13 21:57:35,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:35,461 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:35,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:35,467 INFO L129 PetriNetUnfolder]: 11/99 cut-off events. [2022-07-13 21:57:35,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:35,468 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:35,468 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] [2022-07-13 21:57:35,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2125650499, now seen corresponding path program 1 times [2022-07-13 21:57:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:35,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177979781] [2022-07-13 21:57:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:35,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177979781] [2022-07-13 21:57:35,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177979781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:35,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379417377] [2022-07-13 21:57:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:35,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:35,529 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 196 [2022-07-13 21:57:35,532 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 196 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,532 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:35,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 196 [2022-07-13 21:57:35,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:35,623 INFO L129 PetriNetUnfolder]: 10/350 cut-off events. [2022-07-13 21:57:35,624 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-13 21:57:35,627 INFO L84 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 350 events. 10/350 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1026 event pairs, 1 based on Foata normal form. 202/535 useless extension candidates. Maximal degree in co-relation 266. Up to 30 conditions per place. [2022-07-13 21:57:35,628 INFO L132 encePairwiseOnDemand]: 164/196 looper letters, 15 selfloop transitions, 2 changer transitions 0/170 dead transitions. [2022-07-13 21:57:35,630 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 170 transitions, 404 flow [2022-07-13 21:57:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2022-07-13 21:57:35,635 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8724489795918368 [2022-07-13 21:57:35,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2022-07-13 21:57:35,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2022-07-13 21:57:35,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:35,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2022-07-13 21:57:35,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,644 INFO L186 Difference]: Start difference. First operand has 168 places, 196 transitions, 422 flow. Second operand 3 states and 513 transitions. [2022-07-13 21:57:35,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 170 transitions, 404 flow [2022-07-13 21:57:35,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 170 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:35,652 INFO L242 Difference]: Finished difference. Result has 170 places, 167 transitions, 374 flow [2022-07-13 21:57:35,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2022-07-13 21:57:35,654 INFO L279 CegarLoopForPetriNet]: 168 programPoint places, 2 predicate places. [2022-07-13 21:57:35,654 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 374 flow [2022-07-13 21:57:35,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,655 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:35,655 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-07-13 21:57:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:57:35,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash 882026184, now seen corresponding path program 1 times [2022-07-13 21:57:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:35,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931644184] [2022-07-13 21:57:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:35,701 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:35,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:35,730 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:35,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:35,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:57:35,731 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:57:35,731 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:35,731 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:57:35,761 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:57:35,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-07-13 21:57:35,846 INFO L129 PetriNetUnfolder]: 115/670 cut-off events. [2022-07-13 21:57:35,847 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-13 21:57:35,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2768 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-07-13 21:57:35,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 229 transitions, 502 flow [2022-07-13 21:57:35,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 229 transitions, 502 flow [2022-07-13 21:57:35,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:35,863 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:35,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:35,868 INFO L129 PetriNetUnfolder]: 11/100 cut-off events. [2022-07-13 21:57:35,869 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:35,869 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:35,869 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] [2022-07-13 21:57:35,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:35,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1208141495, now seen corresponding path program 1 times [2022-07-13 21:57:35,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:35,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827152327] [2022-07-13 21:57:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:35,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:35,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:35,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827152327] [2022-07-13 21:57:35,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827152327] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:35,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:35,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:35,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421797089] [2022-07-13 21:57:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:35,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:35,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:35,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 229 [2022-07-13 21:57:35,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 229 transitions, 502 flow. Second operand has 2 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:35,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:35,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 229 [2022-07-13 21:57:35,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:36,014 INFO L129 PetriNetUnfolder]: 25/575 cut-off events. [2022-07-13 21:57:36,015 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-13 21:57:36,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 575 events. 25/575 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2209 event pairs, 6 based on Foata normal form. 280/825 useless extension candidates. Maximal degree in co-relation 418. Up to 37 conditions per place. [2022-07-13 21:57:36,023 INFO L132 encePairwiseOnDemand]: 194/229 looper letters, 8 selfloop transitions, 0 changer transitions 0/193 dead transitions. [2022-07-13 21:57:36,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 193 transitions, 446 flow [2022-07-13 21:57:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 413 transitions. [2022-07-13 21:57:36,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9017467248908297 [2022-07-13 21:57:36,026 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 413 transitions. [2022-07-13 21:57:36,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 413 transitions. [2022-07-13 21:57:36,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:36,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 413 transitions. [2022-07-13 21:57:36,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 206.5) internal successors, (413), 2 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,030 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,030 INFO L186 Difference]: Start difference. First operand has 195 places, 229 transitions, 502 flow. Second operand 2 states and 413 transitions. [2022-07-13 21:57:36,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 193 transitions, 446 flow [2022-07-13 21:57:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 193 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:36,035 INFO L242 Difference]: Finished difference. Result has 195 places, 193 transitions, 430 flow [2022-07-13 21:57:36,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=430, PETRI_PLACES=195, PETRI_TRANSITIONS=193} [2022-07-13 21:57:36,037 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-07-13 21:57:36,037 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 193 transitions, 430 flow [2022-07-13 21:57:36,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:36,037 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] [2022-07-13 21:57:36,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:57:36,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1286607914, now seen corresponding path program 1 times [2022-07-13 21:57:36,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878937871] [2022-07-13 21:57:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:36,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:36,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:36,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878937871] [2022-07-13 21:57:36,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878937871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:36,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:36,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746774520] [2022-07-13 21:57:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:36,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:36,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:36,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:36,080 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 229 [2022-07-13 21:57:36,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 193 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:36,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 229 [2022-07-13 21:57:36,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:36,175 INFO L129 PetriNetUnfolder]: 24/542 cut-off events. [2022-07-13 21:57:36,175 INFO L130 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-07-13 21:57:36,180 INFO L84 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 542 events. 24/542 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2014 event pairs, 6 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 652. Up to 56 conditions per place. [2022-07-13 21:57:36,182 INFO L132 encePairwiseOnDemand]: 226/229 looper letters, 17 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2022-07-13 21:57:36,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 197 transitions, 476 flow [2022-07-13 21:57:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-07-13 21:57:36,184 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8064046579330422 [2022-07-13 21:57:36,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-07-13 21:57:36,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-07-13 21:57:36,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:36,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-07-13 21:57:36,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 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) [2022-07-13 21:57:36,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 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) [2022-07-13 21:57:36,187 INFO L186 Difference]: Start difference. First operand has 195 places, 193 transitions, 430 flow. Second operand 3 states and 554 transitions. [2022-07-13 21:57:36,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 197 transitions, 476 flow [2022-07-13 21:57:36,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 197 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:36,190 INFO L242 Difference]: Finished difference. Result has 198 places, 194 transitions, 442 flow [2022-07-13 21:57:36,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=198, PETRI_TRANSITIONS=194} [2022-07-13 21:57:36,192 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 3 predicate places. [2022-07-13 21:57:36,192 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 194 transitions, 442 flow [2022-07-13 21:57:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,192 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:36,192 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] [2022-07-13 21:57:36,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:57:36,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash 956024503, now seen corresponding path program 1 times [2022-07-13 21:57:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:36,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819440742] [2022-07-13 21:57:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819440742] [2022-07-13 21:57:36,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819440742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770034498] [2022-07-13 21:57:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:36,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:36,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:36,259 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) [2022-07-13 21:57:36,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:57:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:36,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770034498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:36,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:36,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097902383] [2022-07-13 21:57:36,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:36,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:36,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:36,465 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 229 [2022-07-13 21:57:36,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 194 transitions, 442 flow. Second operand has 10 states, 10 states have (on average 179.3) internal successors, (1793), 10 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:36,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 229 [2022-07-13 21:57:36,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:36,602 INFO L129 PetriNetUnfolder]: 22/476 cut-off events. [2022-07-13 21:57:36,602 INFO L130 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-07-13 21:57:36,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 476 events. 22/476 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1580 event pairs, 10 based on Foata normal form. 2/456 useless extension candidates. Maximal degree in co-relation 596. Up to 40 conditions per place. [2022-07-13 21:57:36,608 INFO L132 encePairwiseOnDemand]: 223/229 looper letters, 18 selfloop transitions, 9 changer transitions 0/204 dead transitions. [2022-07-13 21:57:36,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 204 transitions, 518 flow [2022-07-13 21:57:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1622 transitions. [2022-07-13 21:57:36,611 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7869966035904901 [2022-07-13 21:57:36,611 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1622 transitions. [2022-07-13 21:57:36,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1622 transitions. [2022-07-13 21:57:36,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:36,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1622 transitions. [2022-07-13 21:57:36,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 180.22222222222223) internal successors, (1622), 9 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,617 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,618 INFO L186 Difference]: Start difference. First operand has 198 places, 194 transitions, 442 flow. Second operand 9 states and 1622 transitions. [2022-07-13 21:57:36,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 204 transitions, 518 flow [2022-07-13 21:57:36,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 204 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:36,625 INFO L242 Difference]: Finished difference. Result has 208 places, 200 transitions, 490 flow [2022-07-13 21:57:36,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=208, PETRI_TRANSITIONS=200} [2022-07-13 21:57:36,627 INFO L279 CegarLoopForPetriNet]: 195 programPoint places, 13 predicate places. [2022-07-13 21:57:36,627 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 200 transitions, 490 flow [2022-07-13 21:57:36,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.3) internal successors, (1793), 10 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:36,628 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:36,628 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-07-13 21:57:36,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:36,851 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1196007636, now seen corresponding path program 1 times [2022-07-13 21:57:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:36,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035319380] [2022-07-13 21:57:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:36,878 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:36,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:36,899 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:36,899 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:36,899 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:36,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 21:57:36,899 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:57:36,899 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:36,900 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:57:36,923 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 21:57:36,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 222 places, 262 transitions, 584 flow [2022-07-13 21:57:37,057 INFO L129 PetriNetUnfolder]: 181/1027 cut-off events. [2022-07-13 21:57:37,058 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-13 21:57:37,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 1027 events. 181/1027 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4854 event pairs, 23 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 715. Up to 80 conditions per place. [2022-07-13 21:57:37,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 262 transitions, 584 flow [2022-07-13 21:57:37,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 262 transitions, 584 flow [2022-07-13 21:57:37,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:37,080 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:37,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:37,083 INFO L129 PetriNetUnfolder]: 11/100 cut-off events. [2022-07-13 21:57:37,083 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:37,084 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:37,084 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] [2022-07-13 21:57:37,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:37,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash -410899633, now seen corresponding path program 1 times [2022-07-13 21:57:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:37,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88346728] [2022-07-13 21:57:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:37,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:37,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88346728] [2022-07-13 21:57:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88346728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:37,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:37,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:37,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917257614] [2022-07-13 21:57:37,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:37,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 262 [2022-07-13 21:57:37,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 584 flow. Second operand has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:37,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 262 [2022-07-13 21:57:37,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:37,205 INFO L129 PetriNetUnfolder]: 59/899 cut-off events. [2022-07-13 21:57:37,205 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-13 21:57:37,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 899 events. 59/899 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4150 event pairs, 23 based on Foata normal form. 613/1463 useless extension candidates. Maximal degree in co-relation 656. Up to 86 conditions per place. [2022-07-13 21:57:37,217 INFO L132 encePairwiseOnDemand]: 221/262 looper letters, 10 selfloop transitions, 0 changer transitions 0/220 dead transitions. [2022-07-13 21:57:37,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 220 transitions, 520 flow [2022-07-13 21:57:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:37,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:37,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 471 transitions. [2022-07-13 21:57:37,219 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.898854961832061 [2022-07-13 21:57:37,219 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 471 transitions. [2022-07-13 21:57:37,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 471 transitions. [2022-07-13 21:57:37,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:37,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 471 transitions. [2022-07-13 21:57:37,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 235.5) internal successors, (471), 2 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,221 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,221 INFO L186 Difference]: Start difference. First operand has 222 places, 262 transitions, 584 flow. Second operand 2 states and 471 transitions. [2022-07-13 21:57:37,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 220 transitions, 520 flow [2022-07-13 21:57:37,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 220 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:37,224 INFO L242 Difference]: Finished difference. Result has 222 places, 220 transitions, 500 flow [2022-07-13 21:57:37,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=500, PETRI_PLACES=222, PETRI_TRANSITIONS=220} [2022-07-13 21:57:37,225 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 0 predicate places. [2022-07-13 21:57:37,225 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 220 transitions, 500 flow [2022-07-13 21:57:37,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,226 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:37,226 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] [2022-07-13 21:57:37,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:57:37,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1352321322, now seen corresponding path program 1 times [2022-07-13 21:57:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:37,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861531190] [2022-07-13 21:57:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:37,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:37,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861531190] [2022-07-13 21:57:37,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861531190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:37,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:37,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:37,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136689683] [2022-07-13 21:57:37,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:37,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:37,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:37,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:37,249 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 262 [2022-07-13 21:57:37,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 220 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,250 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:37,250 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 262 [2022-07-13 21:57:37,250 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:37,412 INFO L129 PetriNetUnfolder]: 58/866 cut-off events. [2022-07-13 21:57:37,413 INFO L130 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2022-07-13 21:57:37,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 866 events. 58/866 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3979 event pairs, 23 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 1085. Up to 110 conditions per place. [2022-07-13 21:57:37,423 INFO L132 encePairwiseOnDemand]: 259/262 looper letters, 19 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-07-13 21:57:37,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 224 transitions, 550 flow [2022-07-13 21:57:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-07-13 21:57:37,425 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8027989821882952 [2022-07-13 21:57:37,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-07-13 21:57:37,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-07-13 21:57:37,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:37,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-07-13 21:57:37,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,428 INFO L186 Difference]: Start difference. First operand has 222 places, 220 transitions, 500 flow. Second operand 3 states and 631 transitions. [2022-07-13 21:57:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 224 transitions, 550 flow [2022-07-13 21:57:37,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 224 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:37,437 INFO L242 Difference]: Finished difference. Result has 225 places, 221 transitions, 512 flow [2022-07-13 21:57:37,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=512, PETRI_PLACES=225, PETRI_TRANSITIONS=221} [2022-07-13 21:57:37,439 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 3 predicate places. [2022-07-13 21:57:37,439 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 221 transitions, 512 flow [2022-07-13 21:57:37,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,440 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:37,440 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] [2022-07-13 21:57:37,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:57:37,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash -752041066, now seen corresponding path program 1 times [2022-07-13 21:57:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:37,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271153365] [2022-07-13 21:57:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:37,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:37,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271153365] [2022-07-13 21:57:37,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271153365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:37,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214252424] [2022-07-13 21:57:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:37,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:37,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:37,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:57:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:37,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:37,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214252424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:37,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:37,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:37,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314410543] [2022-07-13 21:57:37,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:37,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:37,702 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 262 [2022-07-13 21:57:37,704 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 221 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:37,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 262 [2022-07-13 21:57:37,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:37,858 INFO L129 PetriNetUnfolder]: 56/800 cut-off events. [2022-07-13 21:57:37,858 INFO L130 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-07-13 21:57:37,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 800 events. 56/800 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3553 event pairs, 27 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 1032. Up to 91 conditions per place. [2022-07-13 21:57:37,868 INFO L132 encePairwiseOnDemand]: 256/262 looper letters, 20 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-07-13 21:57:37,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 592 flow [2022-07-13 21:57:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1849 transitions. [2022-07-13 21:57:37,872 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7841391009329941 [2022-07-13 21:57:37,872 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1849 transitions. [2022-07-13 21:57:37,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1849 transitions. [2022-07-13 21:57:37,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:37,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1849 transitions. [2022-07-13 21:57:37,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.44444444444446) internal successors, (1849), 9 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,879 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 262.0) internal successors, (2620), 10 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,879 INFO L186 Difference]: Start difference. First operand has 225 places, 221 transitions, 512 flow. Second operand 9 states and 1849 transitions. [2022-07-13 21:57:37,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 592 flow [2022-07-13 21:57:37,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 231 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:37,883 INFO L242 Difference]: Finished difference. Result has 235 places, 227 transitions, 560 flow [2022-07-13 21:57:37,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=560, PETRI_PLACES=235, PETRI_TRANSITIONS=227} [2022-07-13 21:57:37,884 INFO L279 CegarLoopForPetriNet]: 222 programPoint places, 13 predicate places. [2022-07-13 21:57:37,884 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 227 transitions, 560 flow [2022-07-13 21:57:37,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 204.3) internal successors, (2043), 10 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:37,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:37,885 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1] [2022-07-13 21:57:37,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:38,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 21:57:38,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:38,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1501799583, now seen corresponding path program 1 times [2022-07-13 21:57:38,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:38,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416051425] [2022-07-13 21:57:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:38,114 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:38,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:38,132 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:38,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:38,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:38,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:57:38,132 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:57:38,133 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:38,133 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-13 21:57:38,148 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-13 21:57:38,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 249 places, 295 transitions, 668 flow [2022-07-13 21:57:38,330 INFO L129 PetriNetUnfolder]: 311/1672 cut-off events. [2022-07-13 21:57:38,331 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-13 21:57:38,356 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 1672 events. 311/1672 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9476 event pairs, 72 based on Foata normal form. 0/1418 useless extension candidates. Maximal degree in co-relation 1126. Up to 192 conditions per place. [2022-07-13 21:57:38,357 INFO L82 GeneralOperation]: Start removeDead. Operand has 249 places, 295 transitions, 668 flow [2022-07-13 21:57:38,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 249 places, 295 transitions, 668 flow [2022-07-13 21:57:38,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:38,371 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:38,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:38,374 INFO L129 PetriNetUnfolder]: 10/103 cut-off events. [2022-07-13 21:57:38,375 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:38,375 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:38,375 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] [2022-07-13 21:57:38,375 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash 222408789, now seen corresponding path program 1 times [2022-07-13 21:57:38,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:38,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234279190] [2022-07-13 21:57:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:38,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234279190] [2022-07-13 21:57:38,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234279190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:38,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:38,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854699412] [2022-07-13 21:57:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:38,390 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 295 [2022-07-13 21:57:38,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 295 transitions, 668 flow. Second operand has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:38,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:38,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 295 [2022-07-13 21:57:38,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:38,643 INFO L129 PetriNetUnfolder]: 140/1462 cut-off events. [2022-07-13 21:57:38,644 INFO L130 PetriNetUnfolder]: For 626/626 co-relation queries the response was YES. [2022-07-13 21:57:38,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1927 conditions, 1462 events. 140/1462 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8325 event pairs, 72 based on Foata normal form. 1761/3141 useless extension candidates. Maximal degree in co-relation 1101. Up to 228 conditions per place. [2022-07-13 21:57:38,670 INFO L132 encePairwiseOnDemand]: 245/295 looper letters, 21 selfloop transitions, 2 changer transitions 0/251 dead transitions. [2022-07-13 21:57:38,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 251 transitions, 626 flow [2022-07-13 21:57:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2022-07-13 21:57:38,673 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8610169491525423 [2022-07-13 21:57:38,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2022-07-13 21:57:38,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2022-07-13 21:57:38,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:38,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2022-07-13 21:57:38,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:38,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:38,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:38,677 INFO L186 Difference]: Start difference. First operand has 249 places, 295 transitions, 668 flow. Second operand 3 states and 762 transitions. [2022-07-13 21:57:38,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 251 transitions, 626 flow [2022-07-13 21:57:38,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 251 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:38,681 INFO L242 Difference]: Finished difference. Result has 251 places, 248 transitions, 584 flow [2022-07-13 21:57:38,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=584, PETRI_PLACES=251, PETRI_TRANSITIONS=248} [2022-07-13 21:57:38,682 INFO L279 CegarLoopForPetriNet]: 249 programPoint places, 2 predicate places. [2022-07-13 21:57:38,682 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 248 transitions, 584 flow [2022-07-13 21:57:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:38,683 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:38,683 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] [2022-07-13 21:57:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:57:38,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1411004267, now seen corresponding path program 1 times [2022-07-13 21:57:38,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:38,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669503518] [2022-07-13 21:57:38,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669503518] [2022-07-13 21:57:38,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669503518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:38,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632722466] [2022-07-13 21:57:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:38,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:38,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:38,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:57:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:38,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632722466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:38,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:38,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104676385] [2022-07-13 21:57:38,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:38,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 295 [2022-07-13 21:57:38,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 248 transitions, 584 flow. Second operand has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:38,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:38,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 295 [2022-07-13 21:57:38,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:39,146 INFO L129 PetriNetUnfolder]: 138/1396 cut-off events. [2022-07-13 21:57:39,146 INFO L130 PetriNetUnfolder]: For 629/629 co-relation queries the response was YES. [2022-07-13 21:57:39,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 1396 events. 138/1396 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 7907 event pairs, 76 based on Foata normal form. 2/1324 useless extension candidates. Maximal degree in co-relation 1819. Up to 206 conditions per place. [2022-07-13 21:57:39,166 INFO L132 encePairwiseOnDemand]: 289/295 looper letters, 22 selfloop transitions, 9 changer transitions 0/258 dead transitions. [2022-07-13 21:57:39,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 258 transitions, 668 flow [2022-07-13 21:57:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2076 transitions. [2022-07-13 21:57:39,171 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7819209039548023 [2022-07-13 21:57:39,171 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2076 transitions. [2022-07-13 21:57:39,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2076 transitions. [2022-07-13 21:57:39,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:39,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2076 transitions. [2022-07-13 21:57:39,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 230.66666666666666) internal successors, (2076), 9 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 295.0) internal successors, (2950), 10 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,180 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 295.0) internal successors, (2950), 10 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,180 INFO L186 Difference]: Start difference. First operand has 251 places, 248 transitions, 584 flow. Second operand 9 states and 2076 transitions. [2022-07-13 21:57:39,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 258 transitions, 668 flow [2022-07-13 21:57:39,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 258 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:39,185 INFO L242 Difference]: Finished difference. Result has 261 places, 254 transitions, 632 flow [2022-07-13 21:57:39,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=632, PETRI_PLACES=261, PETRI_TRANSITIONS=254} [2022-07-13 21:57:39,186 INFO L279 CegarLoopForPetriNet]: 249 programPoint places, 12 predicate places. [2022-07-13 21:57:39,186 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 254 transitions, 632 flow [2022-07-13 21:57:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.3) internal successors, (2293), 10 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,188 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:39,188 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:39,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:39,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:39,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:39,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 187363310, now seen corresponding path program 1 times [2022-07-13 21:57:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111621495] [2022-07-13 21:57:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:39,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111621495] [2022-07-13 21:57:39,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111621495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:39,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673216496] [2022-07-13 21:57:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:39,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:39,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:57:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:39,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:39,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673216496] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:39,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:39,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:39,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172681167] [2022-07-13 21:57:39,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:39,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:39,681 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 295 [2022-07-13 21:57:39,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 254 transitions, 632 flow. Second operand has 18 states, 18 states have (on average 229.61111111111111) internal successors, (4133), 18 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:39,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 295 [2022-07-13 21:57:39,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:39,834 INFO L129 PetriNetUnfolder]: 6/244 cut-off events. [2022-07-13 21:57:39,834 INFO L130 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2022-07-13 21:57:39,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 244 events. 6/244 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 465 event pairs, 0 based on Foata normal form. 4/242 useless extension candidates. Maximal degree in co-relation 298. Up to 9 conditions per place. [2022-07-13 21:57:39,837 INFO L132 encePairwiseOnDemand]: 290/295 looper letters, 21 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2022-07-13 21:57:39,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 222 transitions, 670 flow [2022-07-13 21:57:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4811 transitions. [2022-07-13 21:57:39,845 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765940274414851 [2022-07-13 21:57:39,845 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4811 transitions. [2022-07-13 21:57:39,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4811 transitions. [2022-07-13 21:57:39,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:39,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4811 transitions. [2022-07-13 21:57:39,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 229.0952380952381) internal successors, (4811), 21 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,904 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,904 INFO L186 Difference]: Start difference. First operand has 261 places, 254 transitions, 632 flow. Second operand 21 states and 4811 transitions. [2022-07-13 21:57:39,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 222 transitions, 670 flow [2022-07-13 21:57:39,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 222 transitions, 615 flow, removed 20 selfloop flow, removed 4 redundant places. [2022-07-13 21:57:39,909 INFO L242 Difference]: Finished difference. Result has 231 places, 211 transitions, 538 flow [2022-07-13 21:57:39,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=538, PETRI_PLACES=231, PETRI_TRANSITIONS=211} [2022-07-13 21:57:39,910 INFO L279 CegarLoopForPetriNet]: 249 programPoint places, -18 predicate places. [2022-07-13 21:57:39,910 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 211 transitions, 538 flow [2022-07-13 21:57:39,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 229.61111111111111) internal successors, (4133), 18 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:39,912 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:39,912 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-07-13 21:57:39,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:40,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 21:57:40,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash -661165431, now seen corresponding path program 1 times [2022-07-13 21:57:40,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:40,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375098864] [2022-07-13 21:57:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:40,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:40,142 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:40,163 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:40,163 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:40,163 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:40,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:40,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:57:40,164 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:57:40,164 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:40,165 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-13 21:57:40,181 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-13 21:57:40,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 276 places, 328 transitions, 754 flow [2022-07-13 21:57:40,618 INFO L129 PetriNetUnfolder]: 585/2909 cut-off events. [2022-07-13 21:57:40,619 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-13 21:57:40,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 2909 events. 585/2909 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 19704 event pairs, 201 based on Foata normal form. 0/2508 useless extension candidates. Maximal degree in co-relation 1890. Up to 448 conditions per place. [2022-07-13 21:57:40,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 328 transitions, 754 flow [2022-07-13 21:57:40,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 328 transitions, 754 flow [2022-07-13 21:57:40,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:40,689 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:40,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:40,705 INFO L129 PetriNetUnfolder]: 11/102 cut-off events. [2022-07-13 21:57:40,706 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:40,706 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:40,706 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] [2022-07-13 21:57:40,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash 433618333, now seen corresponding path program 1 times [2022-07-13 21:57:40,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285278858] [2022-07-13 21:57:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:40,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285278858] [2022-07-13 21:57:40,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285278858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:40,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:40,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:40,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213478830] [2022-07-13 21:57:40,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:40,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:40,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:40,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:40,727 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 328 [2022-07-13 21:57:40,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 328 transitions, 754 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:40,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:40,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 328 [2022-07-13 21:57:40,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:41,119 INFO L129 PetriNetUnfolder]: 334/2618 cut-off events. [2022-07-13 21:57:41,119 INFO L130 PetriNetUnfolder]: For 1421/1421 co-relation queries the response was YES. [2022-07-13 21:57:41,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 2618 events. 334/2618 cut-off events. For 1421/1421 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 18131 event pairs, 201 based on Foata normal form. 3576/6045 useless extension candidates. Maximal degree in co-relation 1936. Up to 490 conditions per place. [2022-07-13 21:57:41,227 INFO L132 encePairwiseOnDemand]: 272/328 looper letters, 23 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-07-13 21:57:41,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 278 transitions, 704 flow [2022-07-13 21:57:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 845 transitions. [2022-07-13 21:57:41,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.858739837398374 [2022-07-13 21:57:41,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 845 transitions. [2022-07-13 21:57:41,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 845 transitions. [2022-07-13 21:57:41,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:41,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 845 transitions. [2022-07-13 21:57:41,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,233 INFO L186 Difference]: Start difference. First operand has 276 places, 328 transitions, 754 flow. Second operand 3 states and 845 transitions. [2022-07-13 21:57:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 278 transitions, 704 flow [2022-07-13 21:57:41,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 278 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:41,238 INFO L242 Difference]: Finished difference. Result has 278 places, 275 transitions, 658 flow [2022-07-13 21:57:41,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=658, PETRI_PLACES=278, PETRI_TRANSITIONS=275} [2022-07-13 21:57:41,239 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, 2 predicate places. [2022-07-13 21:57:41,239 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 275 transitions, 658 flow [2022-07-13 21:57:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:41,239 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] [2022-07-13 21:57:41,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:57:41,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1020865100, now seen corresponding path program 1 times [2022-07-13 21:57:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711082935] [2022-07-13 21:57:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:41,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:41,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711082935] [2022-07-13 21:57:41,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711082935] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135529021] [2022-07-13 21:57:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:41,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:41,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:41,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 21:57:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:41,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:41,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135529021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:41,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:41,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:41,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125929891] [2022-07-13 21:57:41,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:41,447 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 328 [2022-07-13 21:57:41,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 275 transitions, 658 flow. Second operand has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:41,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 328 [2022-07-13 21:57:41,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:41,936 INFO L129 PetriNetUnfolder]: 332/2552 cut-off events. [2022-07-13 21:57:41,936 INFO L130 PetriNetUnfolder]: For 1424/1424 co-relation queries the response was YES. [2022-07-13 21:57:41,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 2552 events. 332/2552 cut-off events. For 1424/1424 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 17819 event pairs, 205 based on Foata normal form. 2/2414 useless extension candidates. Maximal degree in co-relation 3505. Up to 465 conditions per place. [2022-07-13 21:57:41,976 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 24 selfloop transitions, 9 changer transitions 0/285 dead transitions. [2022-07-13 21:57:41,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 285 transitions, 746 flow [2022-07-13 21:57:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2303 transitions. [2022-07-13 21:57:41,980 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7801490514905149 [2022-07-13 21:57:41,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2303 transitions. [2022-07-13 21:57:41,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2303 transitions. [2022-07-13 21:57:41,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:41,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2303 transitions. [2022-07-13 21:57:41,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.88888888888889) internal successors, (2303), 9 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,988 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,988 INFO L186 Difference]: Start difference. First operand has 278 places, 275 transitions, 658 flow. Second operand 9 states and 2303 transitions. [2022-07-13 21:57:41,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 285 transitions, 746 flow [2022-07-13 21:57:41,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 285 transitions, 744 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:41,992 INFO L242 Difference]: Finished difference. Result has 288 places, 281 transitions, 706 flow [2022-07-13 21:57:41,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=706, PETRI_PLACES=288, PETRI_TRANSITIONS=281} [2022-07-13 21:57:41,993 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, 12 predicate places. [2022-07-13 21:57:41,993 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 281 transitions, 706 flow [2022-07-13 21:57:41,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 254.3) internal successors, (2543), 10 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:41,994 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:41,994 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:42,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 21:57:42,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:42,207 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1719812341, now seen corresponding path program 1 times [2022-07-13 21:57:42,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:42,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565870715] [2022-07-13 21:57:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:42,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:42,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565870715] [2022-07-13 21:57:42,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565870715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:42,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677896118] [2022-07-13 21:57:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:42,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:42,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:42,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:42,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 21:57:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:42,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:42,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677896118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:42,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:42,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:42,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747882975] [2022-07-13 21:57:42,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:42,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:42,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:42,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 328 [2022-07-13 21:57:42,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 281 transitions, 706 flow. Second operand has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:42,536 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:42,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 328 [2022-07-13 21:57:42,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:43,071 INFO L129 PetriNetUnfolder]: 328/2420 cut-off events. [2022-07-13 21:57:43,072 INFO L130 PetriNetUnfolder]: For 1451/1451 co-relation queries the response was YES. [2022-07-13 21:57:43,113 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3471 conditions, 2420 events. 328/2420 cut-off events. For 1451/1451 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 17869 event pairs, 321 based on Foata normal form. 4/2288 useless extension candidates. Maximal degree in co-relation 3216. Up to 453 conditions per place. [2022-07-13 21:57:43,127 INFO L132 encePairwiseOnDemand]: 322/328 looper letters, 32 selfloop transitions, 21 changer transitions 0/305 dead transitions. [2022-07-13 21:57:43,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 305 transitions, 920 flow [2022-07-13 21:57:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5349 transitions. [2022-07-13 21:57:43,177 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7765679442508711 [2022-07-13 21:57:43,178 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5349 transitions. [2022-07-13 21:57:43,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5349 transitions. [2022-07-13 21:57:43,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:43,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5349 transitions. [2022-07-13 21:57:43,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 254.71428571428572) internal successors, (5349), 21 states have internal predecessors, (5349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:43,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:43,197 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 328.0) internal successors, (7216), 22 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:43,197 INFO L186 Difference]: Start difference. First operand has 288 places, 281 transitions, 706 flow. Second operand 21 states and 5349 transitions. [2022-07-13 21:57:43,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 305 transitions, 920 flow [2022-07-13 21:57:43,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 305 transitions, 906 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:43,203 INFO L242 Difference]: Finished difference. Result has 312 places, 294 transitions, 830 flow [2022-07-13 21:57:43,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=830, PETRI_PLACES=312, PETRI_TRANSITIONS=294} [2022-07-13 21:57:43,204 INFO L279 CegarLoopForPetriNet]: 276 programPoint places, 36 predicate places. [2022-07-13 21:57:43,204 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 294 transitions, 830 flow [2022-07-13 21:57:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 254.61111111111111) internal successors, (4583), 18 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:43,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:43,205 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:43,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:43,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1742910734, now seen corresponding path program 1 times [2022-07-13 21:57:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079444324] [2022-07-13 21:57:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:43,436 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:43,450 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:43,450 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:43,450 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:43,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:57:43,450 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:57:43,451 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:43,451 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-13 21:57:43,467 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-13 21:57:43,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 303 places, 361 transitions, 842 flow [2022-07-13 21:57:44,309 INFO L129 PetriNetUnfolder]: 1179/5362 cut-off events. [2022-07-13 21:57:44,309 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-13 21:57:44,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6447 conditions, 5362 events. 1179/5362 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 43068 event pairs, 522 based on Foata normal form. 0/4686 useless extension candidates. Maximal degree in co-relation 3391. Up to 1024 conditions per place. [2022-07-13 21:57:44,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 361 transitions, 842 flow [2022-07-13 21:57:44,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 361 transitions, 842 flow [2022-07-13 21:57:44,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:44,504 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:44,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:44,508 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2022-07-13 21:57:44,509 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:44,509 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:44,509 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] [2022-07-13 21:57:44,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash 222728999, now seen corresponding path program 1 times [2022-07-13 21:57:44,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:44,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781988506] [2022-07-13 21:57:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:44,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781988506] [2022-07-13 21:57:44,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781988506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:44,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:44,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:44,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816775221] [2022-07-13 21:57:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:44,559 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 361 [2022-07-13 21:57:44,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 361 transitions, 842 flow. Second operand has 2 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:44,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:44,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 361 [2022-07-13 21:57:44,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:45,413 INFO L129 PetriNetUnfolder]: 785/4959 cut-off events. [2022-07-13 21:57:45,413 INFO L130 PetriNetUnfolder]: For 3220/3220 co-relation queries the response was YES. [2022-07-13 21:57:45,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 4959 events. 785/4959 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 41143 event pairs, 522 based on Foata normal form. 6624/11301 useless extension candidates. Maximal degree in co-relation 3588. Up to 1033 conditions per place. [2022-07-13 21:57:45,486 INFO L132 encePairwiseOnDemand]: 302/361 looper letters, 16 selfloop transitions, 0 changer transitions 0/301 dead transitions. [2022-07-13 21:57:45,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 301 transitions, 754 flow [2022-07-13 21:57:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 645 transitions. [2022-07-13 21:57:45,487 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8933518005540166 [2022-07-13 21:57:45,488 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 645 transitions. [2022-07-13 21:57:45,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 645 transitions. [2022-07-13 21:57:45,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:45,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 645 transitions. [2022-07-13 21:57:45,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 322.5) internal successors, (645), 2 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:45,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:45,490 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:45,490 INFO L186 Difference]: Start difference. First operand has 303 places, 361 transitions, 842 flow. Second operand 2 states and 645 transitions. [2022-07-13 21:57:45,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 301 transitions, 754 flow [2022-07-13 21:57:45,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 301 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:45,494 INFO L242 Difference]: Finished difference. Result has 303 places, 301 transitions, 722 flow [2022-07-13 21:57:45,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=722, PETRI_PLACES=303, PETRI_TRANSITIONS=301} [2022-07-13 21:57:45,494 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 0 predicate places. [2022-07-13 21:57:45,495 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 301 transitions, 722 flow [2022-07-13 21:57:45,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 286.0) internal successors, (572), 2 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:45,495 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:45,495 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] [2022-07-13 21:57:45,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 21:57:45,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash -302465750, now seen corresponding path program 1 times [2022-07-13 21:57:45,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061777055] [2022-07-13 21:57:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:45,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:45,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:45,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061777055] [2022-07-13 21:57:45,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061777055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:45,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:45,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:45,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285589558] [2022-07-13 21:57:45,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:45,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:45,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:45,510 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 361 [2022-07-13 21:57:45,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 301 transitions, 722 flow. Second operand has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:45,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:45,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 361 [2022-07-13 21:57:45,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:46,412 INFO L129 PetriNetUnfolder]: 784/4926 cut-off events. [2022-07-13 21:57:46,412 INFO L130 PetriNetUnfolder]: For 3184/3184 co-relation queries the response was YES. [2022-07-13 21:57:46,474 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7089 conditions, 4926 events. 784/4926 cut-off events. For 3184/3184 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 40991 event pairs, 522 based on Foata normal form. 0/4646 useless extension candidates. Maximal degree in co-relation 7078. Up to 1072 conditions per place. [2022-07-13 21:57:46,503 INFO L132 encePairwiseOnDemand]: 358/361 looper letters, 25 selfloop transitions, 2 changer transitions 0/305 dead transitions. [2022-07-13 21:57:46,503 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 305 transitions, 784 flow [2022-07-13 21:57:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2022-07-13 21:57:46,505 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7959372114496768 [2022-07-13 21:57:46,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2022-07-13 21:57:46,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2022-07-13 21:57:46,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:46,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2022-07-13 21:57:46,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:46,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:46,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:46,508 INFO L186 Difference]: Start difference. First operand has 303 places, 301 transitions, 722 flow. Second operand 3 states and 862 transitions. [2022-07-13 21:57:46,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 305 transitions, 784 flow [2022-07-13 21:57:46,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 305 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:46,512 INFO L242 Difference]: Finished difference. Result has 306 places, 302 transitions, 734 flow [2022-07-13 21:57:46,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=734, PETRI_PLACES=306, PETRI_TRANSITIONS=302} [2022-07-13 21:57:46,513 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 3 predicate places. [2022-07-13 21:57:46,513 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 302 transitions, 734 flow [2022-07-13 21:57:46,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:46,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:46,514 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] [2022-07-13 21:57:46,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 21:57:46,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:46,515 INFO L85 PathProgramCache]: Analyzing trace with hash 418376435, now seen corresponding path program 1 times [2022-07-13 21:57:46,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:46,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355902480] [2022-07-13 21:57:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:46,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355902480] [2022-07-13 21:57:46,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355902480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295715903] [2022-07-13 21:57:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:46,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:46,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:46,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 21:57:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:46,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:46,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295715903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:46,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:46,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857001014] [2022-07-13 21:57:46,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:46,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:46,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:46,708 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 361 [2022-07-13 21:57:46,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 302 transitions, 734 flow. Second operand has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:46,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:46,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 361 [2022-07-13 21:57:46,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:47,696 INFO L129 PetriNetUnfolder]: 782/4860 cut-off events. [2022-07-13 21:57:47,696 INFO L130 PetriNetUnfolder]: For 3187/3187 co-relation queries the response was YES. [2022-07-13 21:57:47,766 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7047 conditions, 4860 events. 782/4860 cut-off events. For 3187/3187 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 40660 event pairs, 526 based on Foata normal form. 2/4592 useless extension candidates. Maximal degree in co-relation 7034. Up to 1044 conditions per place. [2022-07-13 21:57:47,790 INFO L132 encePairwiseOnDemand]: 355/361 looper letters, 26 selfloop transitions, 9 changer transitions 0/312 dead transitions. [2022-07-13 21:57:47,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 312 transitions, 826 flow [2022-07-13 21:57:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2530 transitions. [2022-07-13 21:57:47,792 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7787011388119421 [2022-07-13 21:57:47,793 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2530 transitions. [2022-07-13 21:57:47,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2530 transitions. [2022-07-13 21:57:47,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:47,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2530 transitions. [2022-07-13 21:57:47,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.1111111111111) internal successors, (2530), 9 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:47,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:47,799 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:47,799 INFO L186 Difference]: Start difference. First operand has 306 places, 302 transitions, 734 flow. Second operand 9 states and 2530 transitions. [2022-07-13 21:57:47,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 312 transitions, 826 flow [2022-07-13 21:57:47,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 312 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:47,803 INFO L242 Difference]: Finished difference. Result has 316 places, 308 transitions, 782 flow [2022-07-13 21:57:47,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=782, PETRI_PLACES=316, PETRI_TRANSITIONS=308} [2022-07-13 21:57:47,804 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 13 predicate places. [2022-07-13 21:57:47,804 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 308 transitions, 782 flow [2022-07-13 21:57:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.3) internal successors, (2793), 10 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:47,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:47,805 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:47,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:48,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:48,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:48,016 INFO L85 PathProgramCache]: Analyzing trace with hash 130779016, now seen corresponding path program 1 times [2022-07-13 21:57:48,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:48,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103956275] [2022-07-13 21:57:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:48,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:48,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103956275] [2022-07-13 21:57:48,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103956275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:48,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071288395] [2022-07-13 21:57:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:48,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 21:57:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:48,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:48,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071288395] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:48,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:48,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159619290] [2022-07-13 21:57:48,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:48,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:48,304 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 361 [2022-07-13 21:57:48,306 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 308 transitions, 782 flow. Second operand has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:48,306 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:48,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 361 [2022-07-13 21:57:48,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:49,289 INFO L129 PetriNetUnfolder]: 778/4728 cut-off events. [2022-07-13 21:57:49,289 INFO L130 PetriNetUnfolder]: For 3219/3219 co-relation queries the response was YES. [2022-07-13 21:57:49,384 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6960 conditions, 4728 events. 778/4728 cut-off events. For 3219/3219 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 42404 event pairs, 642 based on Foata normal form. 4/4466 useless extension candidates. Maximal degree in co-relation 6945. Up to 1032 conditions per place. [2022-07-13 21:57:49,416 INFO L132 encePairwiseOnDemand]: 355/361 looper letters, 34 selfloop transitions, 21 changer transitions 0/332 dead transitions. [2022-07-13 21:57:49,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 332 transitions, 1000 flow [2022-07-13 21:57:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:57:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:57:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5876 transitions. [2022-07-13 21:57:49,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7750956338213956 [2022-07-13 21:57:49,421 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5876 transitions. [2022-07-13 21:57:49,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5876 transitions. [2022-07-13 21:57:49,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:49,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5876 transitions. [2022-07-13 21:57:49,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 279.8095238095238) internal successors, (5876), 21 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:49,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:49,506 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 361.0) internal successors, (7942), 22 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:49,507 INFO L186 Difference]: Start difference. First operand has 316 places, 308 transitions, 782 flow. Second operand 21 states and 5876 transitions. [2022-07-13 21:57:49,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 332 transitions, 1000 flow [2022-07-13 21:57:49,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 332 transitions, 986 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:49,512 INFO L242 Difference]: Finished difference. Result has 340 places, 321 transitions, 906 flow [2022-07-13 21:57:49,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=906, PETRI_PLACES=340, PETRI_TRANSITIONS=321} [2022-07-13 21:57:49,513 INFO L279 CegarLoopForPetriNet]: 303 programPoint places, 37 predicate places. [2022-07-13 21:57:49,513 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 321 transitions, 906 flow [2022-07-13 21:57:49,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 279.6111111111111) internal successors, (5033), 18 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:49,514 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:49,514 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:49,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:49,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 21:57:49,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash -729596358, now seen corresponding path program 1 times [2022-07-13 21:57:49,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:49,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848168493] [2022-07-13 21:57:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:49,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:49,754 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:49,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:49,773 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:49,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:49,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:49,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 21:57:49,773 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:57:49,773 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:49,774 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-13 21:57:49,793 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-13 21:57:49,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 330 places, 394 transitions, 932 flow [2022-07-13 21:57:51,533 INFO L129 PetriNetUnfolder]: 2477/10311 cut-off events. [2022-07-13 21:57:51,533 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-13 21:57:51,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 10311 events. 2477/10311 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 96908 event pairs, 1291 based on Foata normal form. 0/9104 useless extension candidates. Maximal degree in co-relation 6429. Up to 2304 conditions per place. [2022-07-13 21:57:51,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 394 transitions, 932 flow [2022-07-13 21:57:51,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 394 transitions, 932 flow [2022-07-13 21:57:51,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:51,909 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:57:51,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:51,912 INFO L129 PetriNetUnfolder]: 11/102 cut-off events. [2022-07-13 21:57:51,912 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:57:51,913 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:51,913 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] [2022-07-13 21:57:51,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -152093775, now seen corresponding path program 1 times [2022-07-13 21:57:51,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:51,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881597103] [2022-07-13 21:57:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:51,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:51,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881597103] [2022-07-13 21:57:51,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881597103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:51,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:51,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102512585] [2022-07-13 21:57:51,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:51,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:51,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:51,933 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 394 [2022-07-13 21:57:51,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 394 transitions, 932 flow. Second operand has 2 states, 2 states have (on average 311.0) internal successors, (622), 2 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:51,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:51,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 394 [2022-07-13 21:57:51,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:53,792 INFO L129 PetriNetUnfolder]: 1811/9635 cut-off events. [2022-07-13 21:57:53,792 INFO L130 PetriNetUnfolder]: For 7113/7113 co-relation queries the response was YES. [2022-07-13 21:57:53,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 9635 events. 1811/9635 cut-off events. For 7113/7113 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92976 event pairs, 1291 based on Foata normal form. 14613/23707 useless extension candidates. Maximal degree in co-relation 7058. Up to 2314 conditions per place. [2022-07-13 21:57:53,999 INFO L132 encePairwiseOnDemand]: 329/394 looper letters, 18 selfloop transitions, 0 changer transitions 0/328 dead transitions. [2022-07-13 21:57:53,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 328 transitions, 836 flow [2022-07-13 21:57:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 703 transitions. [2022-07-13 21:57:54,000 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8921319796954315 [2022-07-13 21:57:54,000 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 703 transitions. [2022-07-13 21:57:54,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 703 transitions. [2022-07-13 21:57:54,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:54,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 703 transitions. [2022-07-13 21:57:54,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,002 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 394.0) internal successors, (1182), 3 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,002 INFO L186 Difference]: Start difference. First operand has 330 places, 394 transitions, 932 flow. Second operand 2 states and 703 transitions. [2022-07-13 21:57:54,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 328 transitions, 836 flow [2022-07-13 21:57:54,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 328 transitions, 836 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:54,007 INFO L242 Difference]: Finished difference. Result has 330 places, 328 transitions, 800 flow [2022-07-13 21:57:54,007 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=800, PETRI_PLACES=330, PETRI_TRANSITIONS=328} [2022-07-13 21:57:54,007 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 0 predicate places. [2022-07-13 21:57:54,008 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 328 transitions, 800 flow [2022-07-13 21:57:54,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 311.0) internal successors, (622), 2 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,008 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:54,008 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] [2022-07-13 21:57:54,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 21:57:54,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash -39714774, now seen corresponding path program 1 times [2022-07-13 21:57:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:54,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617302937] [2022-07-13 21:57:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:54,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:54,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:54,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617302937] [2022-07-13 21:57:54,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617302937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:54,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:54,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361748386] [2022-07-13 21:57:54,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:54,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:54,024 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 394 [2022-07-13 21:57:54,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 328 transitions, 800 flow. Second operand has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:54,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:54,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 394 [2022-07-13 21:57:54,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:56,021 INFO L129 PetriNetUnfolder]: 1810/9602 cut-off events. [2022-07-13 21:57:56,021 INFO L130 PetriNetUnfolder]: For 7068/7068 co-relation queries the response was YES. [2022-07-13 21:57:56,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14343 conditions, 9602 events. 1810/9602 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92641 event pairs, 1291 based on Foata normal form. 0/9063 useless extension candidates. Maximal degree in co-relation 14331. Up to 2358 conditions per place. [2022-07-13 21:57:56,199 INFO L132 encePairwiseOnDemand]: 391/394 looper letters, 27 selfloop transitions, 2 changer transitions 0/332 dead transitions. [2022-07-13 21:57:56,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 332 transitions, 866 flow [2022-07-13 21:57:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 939 transitions. [2022-07-13 21:57:56,200 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7944162436548223 [2022-07-13 21:57:56,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 939 transitions. [2022-07-13 21:57:56,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 939 transitions. [2022-07-13 21:57:56,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:56,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 939 transitions. [2022-07-13 21:57:56,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 394.0) internal successors, (1576), 4 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,202 INFO L186 Difference]: Start difference. First operand has 330 places, 328 transitions, 800 flow. Second operand 3 states and 939 transitions. [2022-07-13 21:57:56,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 332 transitions, 866 flow [2022-07-13 21:57:56,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 332 transitions, 866 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:56,208 INFO L242 Difference]: Finished difference. Result has 333 places, 329 transitions, 812 flow [2022-07-13 21:57:56,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=812, PETRI_PLACES=333, PETRI_TRANSITIONS=329} [2022-07-13 21:57:56,208 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 3 predicate places. [2022-07-13 21:57:56,208 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 329 transitions, 812 flow [2022-07-13 21:57:56,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:56,209 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] [2022-07-13 21:57:56,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-13 21:57:56,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1388246958, now seen corresponding path program 1 times [2022-07-13 21:57:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360203598] [2022-07-13 21:57:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:56,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360203598] [2022-07-13 21:57:56,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360203598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:56,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945394503] [2022-07-13 21:57:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:56,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:56,243 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:56,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 21:57:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:56,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:56,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:56,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945394503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:56,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:56,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058007608] [2022-07-13 21:57:56,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:56,394 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 394 [2022-07-13 21:57:56,395 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 329 transitions, 812 flow. Second operand has 10 states, 10 states have (on average 304.3) internal successors, (3043), 10 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:56,395 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:56,395 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 394 [2022-07-13 21:57:56,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:58,215 INFO L129 PetriNetUnfolder]: 1808/9536 cut-off events. [2022-07-13 21:57:58,215 INFO L130 PetriNetUnfolder]: For 7071/7071 co-relation queries the response was YES. [2022-07-13 21:57:58,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14304 conditions, 9536 events. 1808/9536 cut-off events. For 7071/7071 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 92353 event pairs, 1295 based on Foata normal form. 2/9010 useless extension candidates. Maximal degree in co-relation 14290. Up to 2327 conditions per place. [2022-07-13 21:57:58,409 INFO L132 encePairwiseOnDemand]: 388/394 looper letters, 28 selfloop transitions, 9 changer transitions 0/339 dead transitions. [2022-07-13 21:57:58,409 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 339 transitions, 908 flow [2022-07-13 21:57:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2757 transitions. [2022-07-13 21:57:58,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7774957698815567 [2022-07-13 21:57:58,411 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2757 transitions. [2022-07-13 21:57:58,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2757 transitions. [2022-07-13 21:57:58,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:58,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2757 transitions. [2022-07-13 21:57:58,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 306.3333333333333) internal successors, (2757), 9 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 394.0) internal successors, (3940), 10 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 394.0) internal successors, (3940), 10 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,416 INFO L186 Difference]: Start difference. First operand has 333 places, 329 transitions, 812 flow. Second operand 9 states and 2757 transitions. [2022-07-13 21:57:58,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 339 transitions, 908 flow [2022-07-13 21:57:58,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 339 transitions, 906 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:58,421 INFO L242 Difference]: Finished difference. Result has 343 places, 335 transitions, 860 flow [2022-07-13 21:57:58,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=860, PETRI_PLACES=343, PETRI_TRANSITIONS=335} [2022-07-13 21:57:58,422 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 13 predicate places. [2022-07-13 21:57:58,422 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 335 transitions, 860 flow [2022-07-13 21:57:58,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 304.3) internal successors, (3043), 10 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,423 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:58,423 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:58,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:58,624 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1444170085, now seen corresponding path program 1 times [2022-07-13 21:57:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:58,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765342211] [2022-07-13 21:57:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:58,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765342211] [2022-07-13 21:57:58,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765342211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741084148] [2022-07-13 21:57:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:58,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:58,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:58,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:58,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 21:57:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 21:57:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:58,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:58,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741084148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:58,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:58,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 21:57:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637163958] [2022-07-13 21:57:58,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 21:57:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 21:57:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-13 21:57:58,930 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 394 [2022-07-13 21:57:58,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 335 transitions, 860 flow. Second operand has 18 states, 18 states have (on average 304.6111111111111) internal successors, (5483), 18 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:58,932 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:58,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 394 [2022-07-13 21:57:58,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:00,949 INFO L129 PetriNetUnfolder]: 1804/9404 cut-off events. [2022-07-13 21:58:00,949 INFO L130 PetriNetUnfolder]: For 7108/7108 co-relation queries the response was YES. [2022-07-13 21:58:01,100 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14225 conditions, 9404 events. 1804/9404 cut-off events. For 7108/7108 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 95404 event pairs, 1411 based on Foata normal form. 4/8884 useless extension candidates. Maximal degree in co-relation 14209. Up to 2315 conditions per place. [2022-07-13 21:58:01,157 INFO L132 encePairwiseOnDemand]: 388/394 looper letters, 36 selfloop transitions, 21 changer transitions 0/359 dead transitions. [2022-07-13 21:58:01,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 359 transitions, 1082 flow [2022-07-13 21:58:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 21:58:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-13 21:58:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6403 transitions. [2022-07-13 21:58:01,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7738699540729997 [2022-07-13 21:58:01,163 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6403 transitions. [2022-07-13 21:58:01,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6403 transitions. [2022-07-13 21:58:01,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:01,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6403 transitions. [2022-07-13 21:58:01,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 304.9047619047619) internal successors, (6403), 21 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 394.0) internal successors, (8668), 22 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,175 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 394.0) internal successors, (8668), 22 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,175 INFO L186 Difference]: Start difference. First operand has 343 places, 335 transitions, 860 flow. Second operand 21 states and 6403 transitions. [2022-07-13 21:58:01,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 359 transitions, 1082 flow [2022-07-13 21:58:01,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 359 transitions, 1068 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-13 21:58:01,182 INFO L242 Difference]: Finished difference. Result has 367 places, 348 transitions, 984 flow [2022-07-13 21:58:01,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=394, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=984, PETRI_PLACES=367, PETRI_TRANSITIONS=348} [2022-07-13 21:58:01,183 INFO L279 CegarLoopForPetriNet]: 330 programPoint places, 37 predicate places. [2022-07-13 21:58:01,183 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 348 transitions, 984 flow [2022-07-13 21:58:01,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 304.6111111111111) internal successors, (5483), 18 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:01,184 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:01,184 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:58:01,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-13 21:58:01,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-13 21:58:01,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1457464127, now seen corresponding path program 1 times [2022-07-13 21:58:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777256488] [2022-07-13 21:58:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:01,414 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:58:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:58:01,432 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:58:01,432 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:58:01,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:58:01,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:58:01,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-13 21:58:01,433 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-13 21:58:01,433 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:58:01,433 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-13 21:58:01,456 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-13 21:58:01,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 357 places, 427 transitions, 1024 flow [2022-07-13 21:58:05,367 INFO L129 PetriNetUnfolder]: 5311/20380 cut-off events. [2022-07-13 21:58:05,367 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-13 21:58:05,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 20380 events. 5311/20380 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 216605 event pairs, 3084 based on Foata normal form. 0/18130 useless extension candidates. Maximal degree in co-relation 12668. Up to 5120 conditions per place. [2022-07-13 21:58:05,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 427 transitions, 1024 flow [2022-07-13 21:58:05,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 427 transitions, 1024 flow [2022-07-13 21:58:05,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:58:05,998 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@78e7f5e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@470573da [2022-07-13 21:58:05,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:58:06,001 INFO L129 PetriNetUnfolder]: 11/103 cut-off events. [2022-07-13 21:58:06,001 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:58:06,001 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:06,001 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] [2022-07-13 21:58:06,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -819932708, now seen corresponding path program 1 times [2022-07-13 21:58:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:06,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558088804] [2022-07-13 21:58:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:06,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558088804] [2022-07-13 21:58:06,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558088804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:06,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:06,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:58:06,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019850606] [2022-07-13 21:58:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:58:06,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:58:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:58:06,013 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 427 [2022-07-13 21:58:06,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 427 transitions, 1024 flow. Second operand has 2 states, 2 states have (on average 336.0) internal successors, (672), 2 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:06,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:06,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 427 [2022-07-13 21:58:06,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:10,193 INFO L129 PetriNetUnfolder]: 4117/19175 cut-off events. [2022-07-13 21:58:10,194 INFO L130 PetriNetUnfolder]: For 15625/15625 co-relation queries the response was YES. [2022-07-13 21:58:10,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29512 conditions, 19175 events. 4117/19175 cut-off events. For 15625/15625 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 209988 event pairs, 3084 based on Foata normal form. 32080/50199 useless extension candidates. Maximal degree in co-relation 14305. Up to 5131 conditions per place. [2022-07-13 21:58:10,705 INFO L132 encePairwiseOnDemand]: 356/427 looper letters, 20 selfloop transitions, 0 changer transitions 0/355 dead transitions. [2022-07-13 21:58:10,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 355 transitions, 920 flow [2022-07-13 21:58:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:58:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:58:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 761 transitions. [2022-07-13 21:58:10,706 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8911007025761124 [2022-07-13 21:58:10,706 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 761 transitions. [2022-07-13 21:58:10,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 761 transitions. [2022-07-13 21:58:10,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:10,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 761 transitions. [2022-07-13 21:58:10,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 380.5) internal successors, (761), 2 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:10,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:10,708 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:10,708 INFO L186 Difference]: Start difference. First operand has 357 places, 427 transitions, 1024 flow. Second operand 2 states and 761 transitions. [2022-07-13 21:58:10,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 355 transitions, 920 flow [2022-07-13 21:58:10,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 355 transitions, 920 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:10,717 INFO L242 Difference]: Finished difference. Result has 357 places, 355 transitions, 880 flow [2022-07-13 21:58:10,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=880, PETRI_PLACES=357, PETRI_TRANSITIONS=355} [2022-07-13 21:58:10,718 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-07-13 21:58:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 355 transitions, 880 flow [2022-07-13 21:58:10,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 336.0) internal successors, (672), 2 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:10,719 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:10,719 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] [2022-07-13 21:58:10,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-13 21:58:10,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -801446230, now seen corresponding path program 1 times [2022-07-13 21:58:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:10,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128262358] [2022-07-13 21:58:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128262358] [2022-07-13 21:58:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128262358] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:58:10,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:58:10,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:58:10,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725637501] [2022-07-13 21:58:10,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:58:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:58:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:58:10,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:58:10,744 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 427 [2022-07-13 21:58:10,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 355 transitions, 880 flow. Second operand has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:10,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:10,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 427 [2022-07-13 21:58:10,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:58:14,853 INFO L129 PetriNetUnfolder]: 4116/19142 cut-off events. [2022-07-13 21:58:14,853 INFO L130 PetriNetUnfolder]: For 15570/15570 co-relation queries the response was YES. [2022-07-13 21:58:15,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29534 conditions, 19142 events. 4116/19142 cut-off events. For 15570/15570 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 209637 event pairs, 3084 based on Foata normal form. 0/18088 useless extension candidates. Maximal degree in co-relation 29521. Up to 5180 conditions per place. [2022-07-13 21:58:15,479 INFO L132 encePairwiseOnDemand]: 424/427 looper letters, 29 selfloop transitions, 2 changer transitions 0/359 dead transitions. [2022-07-13 21:58:15,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 359 transitions, 950 flow [2022-07-13 21:58:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:58:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:58:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2022-07-13 21:58:15,481 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7931303669008587 [2022-07-13 21:58:15,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2022-07-13 21:58:15,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2022-07-13 21:58:15,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:58:15,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2022-07-13 21:58:15,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:15,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:15,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:15,483 INFO L186 Difference]: Start difference. First operand has 357 places, 355 transitions, 880 flow. Second operand 3 states and 1016 transitions. [2022-07-13 21:58:15,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 359 transitions, 950 flow [2022-07-13 21:58:15,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 359 transitions, 950 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:58:15,489 INFO L242 Difference]: Finished difference. Result has 360 places, 356 transitions, 892 flow [2022-07-13 21:58:15,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=892, PETRI_PLACES=360, PETRI_TRANSITIONS=356} [2022-07-13 21:58:15,490 INFO L279 CegarLoopForPetriNet]: 357 programPoint places, 3 predicate places. [2022-07-13 21:58:15,490 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 356 transitions, 892 flow [2022-07-13 21:58:15,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:15,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:58:15,491 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] [2022-07-13 21:58:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-13 21:58:15,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:58:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:58:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2145767983, now seen corresponding path program 1 times [2022-07-13 21:58:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:58:15,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580284436] [2022-07-13 21:58:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:58:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:58:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580284436] [2022-07-13 21:58:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580284436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:58:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598769770] [2022-07-13 21:58:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:58:15,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:58:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:58:15,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:58:15,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 21:58:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:58:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:58:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:58:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:15,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:58:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:58:15,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598769770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:58:15,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:58:15,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:58:15,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757879856] [2022-07-13 21:58:15,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:58:15,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:58:15,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:58:15,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:58:15,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:58:15,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 427 [2022-07-13 21:58:15,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 356 transitions, 892 flow. Second operand has 10 states, 10 states have (on average 329.3) internal successors, (3293), 10 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:58:15,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:58:15,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 427 [2022-07-13 21:58:15,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand