./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:04:48,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:04:48,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:04:48,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:04:48,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:04:48,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:04:48,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:04:48,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:04:48,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:04:48,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:04:48,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:04:48,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:04:48,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:04:48,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:04:48,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:04:48,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:04:48,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:04:48,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:04:48,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:04:48,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:04:48,939 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:04:48,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:04:48,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:04:48,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:04:48,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:04:48,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:04:48,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:04:48,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:04:48,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:04:48,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:04:48,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:04:48,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:04:48,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:04:48,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:04:48,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:04:48,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:04:48,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:04:48,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:04:48,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:04:48,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:04:48,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:04:48,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:04:48,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:04:48,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:04:48,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:04:48,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:04:48,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:04:48,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:04:48,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:04:48,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:04:48,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:04:48,985 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:04:48,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:04:48,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:04:48,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:04:48,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:04:48,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:04:48,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:04:48,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:04:48,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:04:48,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:04:48,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:04:48,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:04:48,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:04:48,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:04:48,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:04:48,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:04:48,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:48,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:04:48,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:04:48,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:04:48,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:04:48,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:04:48,990 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:04:48,991 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:04:48,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:04:48,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2022-07-19 21:04:49,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:04:49,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:04:49,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:04:49,273 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:04:49,273 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:04:49,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-07-19 21:04:49,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2592e0613/d093742ec63445c7b235de4bb245ede3/FLAGec3ac7cee [2022-07-19 21:04:49,759 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:04:49,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2022-07-19 21:04:49,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2592e0613/d093742ec63445c7b235de4bb245ede3/FLAGec3ac7cee [2022-07-19 21:04:50,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2592e0613/d093742ec63445c7b235de4bb245ede3 [2022-07-19 21:04:50,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:04:50,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:04:50,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:50,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:04:50,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:04:50,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119ae498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50, skipping insertion in model container [2022-07-19 21:04:50,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:04:50,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:04:50,503 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-07-19 21:04:50,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:50,523 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:04:50,552 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2022-07-19 21:04:50,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:04:50,585 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:04:50,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50 WrapperNode [2022-07-19 21:04:50,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:04:50,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:50,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:04:50,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:04:50,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,649 INFO L137 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 125 [2022-07-19 21:04:50,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:04:50,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:04:50,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:04:50,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:04:50,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:04:50,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:04:50,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:04:50,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:04:50,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (1/1) ... [2022-07-19 21:04:50,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:04:50,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:04:50,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:04:50,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:04:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:04:50,789 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-07-19 21:04:50,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-07-19 21:04:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-19 21:04:50,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-19 21:04:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:04:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:04:50,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:04:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:04:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:04:50,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:04:50,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:04:50,793 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:04:50,947 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:04:50,952 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:04:51,142 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:04:51,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:04:51,241 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 21:04:51,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:51 BoogieIcfgContainer [2022-07-19 21:04:51,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:04:51,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:04:51,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:04:51,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:04:51,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:04:50" (1/3) ... [2022-07-19 21:04:51,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4719557d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:51, skipping insertion in model container [2022-07-19 21:04:51,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:04:50" (2/3) ... [2022-07-19 21:04:51,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4719557d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:04:51, skipping insertion in model container [2022-07-19 21:04:51,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:04:51" (3/3) ... [2022-07-19 21:04:51,251 INFO L111 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2022-07-19 21:04:51,257 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:04:51,265 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:04:51,266 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:04:51,266 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:04:51,353 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:51,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2022-07-19 21:04:51,455 INFO L129 PetriNetUnfolder]: 6/90 cut-off events. [2022-07-19 21:04:51,455 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:51,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 6/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-19 21:04:51,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2022-07-19 21:04:51,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 79 transitions, 166 flow [2022-07-19 21:04:51,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:51,489 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@6b942a77, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cec8af2 [2022-07-19 21:04:51,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:04:51,504 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-07-19 21:04:51,504 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:51,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:51,506 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] [2022-07-19 21:04:51,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:04:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 125568587, now seen corresponding path program 1 times [2022-07-19 21:04:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:51,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252041106] [2022-07-19 21:04:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:51,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252041106] [2022-07-19 21:04:51,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252041106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:51,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:51,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:04:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976527785] [2022-07-19 21:04:51,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:04:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:04:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:04:51,832 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 80 [2022-07-19 21:04:51,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:51,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:51,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 80 [2022-07-19 21:04:51,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:51,989 INFO L129 PetriNetUnfolder]: 61/211 cut-off events. [2022-07-19 21:04:51,989 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:04:51,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 211 events. 61/211 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 574 event pairs, 17 based on Foata normal form. 102/296 useless extension candidates. Maximal degree in co-relation 321. Up to 100 conditions per place. [2022-07-19 21:04:51,996 INFO L132 encePairwiseOnDemand]: 72/80 looper letters, 20 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2022-07-19 21:04:51,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 190 flow [2022-07-19 21:04:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:04:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:04:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-07-19 21:04:52,013 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8208333333333333 [2022-07-19 21:04:52,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-07-19 21:04:52,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-07-19 21:04:52,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:52,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-07-19 21:04:52,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,034 INFO L186 Difference]: Start difference. First operand has 80 places, 79 transitions, 166 flow. Second operand 3 states and 197 transitions. [2022-07-19 21:04:52,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 190 flow [2022-07-19 21:04:52,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:52,048 INFO L242 Difference]: Finished difference. Result has 72 places, 66 transitions, 147 flow [2022-07-19 21:04:52,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2022-07-19 21:04:52,054 INFO L279 CegarLoopForPetriNet]: 80 programPoint places, -8 predicate places. [2022-07-19 21:04:52,055 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 147 flow [2022-07-19 21:04:52,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,055 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:52,055 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:52,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:04:52,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:04:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1533918423, now seen corresponding path program 1 times [2022-07-19 21:04:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:52,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206305322] [2022-07-19 21:04:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:52,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:52,082 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:52,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:52,121 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:52,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-19 21:04:52,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-19 21:04:52,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-19 21:04:52,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-19 21:04:52,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:04:52,126 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-19 21:04:52,128 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:52,128 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:04:52,187 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:52,193 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 122 transitions, 268 flow [2022-07-19 21:04:52,213 INFO L129 PetriNetUnfolder]: 8/131 cut-off events. [2022-07-19 21:04:52,214 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:04:52,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 131 events. 8/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 140. Up to 6 conditions per place. [2022-07-19 21:04:52,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 122 transitions, 268 flow [2022-07-19 21:04:52,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 107 transitions, 229 flow [2022-07-19 21:04:52,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:52,227 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@6b942a77, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cec8af2 [2022-07-19 21:04:52,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-19 21:04:52,232 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2022-07-19 21:04:52,232 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:52,232 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:52,232 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] [2022-07-19 21:04:52,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2007188311, now seen corresponding path program 1 times [2022-07-19 21:04:52,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:52,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125657028] [2022-07-19 21:04:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:52,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:52,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125657028] [2022-07-19 21:04:52,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125657028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:52,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:52,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:04:52,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175269200] [2022-07-19 21:04:52,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:04:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:52,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:04:52,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:04:52,304 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 122 [2022-07-19 21:04:52,305 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,305 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:52,306 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 122 [2022-07-19 21:04:52,306 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:52,858 INFO L129 PetriNetUnfolder]: 1665/3238 cut-off events. [2022-07-19 21:04:52,859 INFO L130 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2022-07-19 21:04:52,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6006 conditions, 3238 events. 1665/3238 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 20522 event pairs, 672 based on Foata normal form. 1436/4484 useless extension candidates. Maximal degree in co-relation 5975. Up to 2444 conditions per place. [2022-07-19 21:04:52,895 INFO L132 encePairwiseOnDemand]: 113/122 looper letters, 39 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2022-07-19 21:04:52,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 312 flow [2022-07-19 21:04:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:04:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:04:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2022-07-19 21:04:52,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7568306010928961 [2022-07-19 21:04:52,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2022-07-19 21:04:52,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2022-07-19 21:04:52,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:52,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2022-07-19 21:04:52,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,908 INFO L186 Difference]: Start difference. First operand has 109 places, 107 transitions, 229 flow. Second operand 3 states and 277 transitions. [2022-07-19 21:04:52,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 312 flow [2022-07-19 21:04:52,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 309 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:52,914 INFO L242 Difference]: Finished difference. Result has 101 places, 96 transitions, 219 flow [2022-07-19 21:04:52,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2022-07-19 21:04:52,915 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, -8 predicate places. [2022-07-19 21:04:52,915 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 219 flow [2022-07-19 21:04:52,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:52,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:52,916 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] [2022-07-19 21:04:52,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:04:52,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1650657833, now seen corresponding path program 1 times [2022-07-19 21:04:52,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21214505] [2022-07-19 21:04:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:53,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:53,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21214505] [2022-07-19 21:04:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21214505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:53,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:53,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:04:53,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464961380] [2022-07-19 21:04:53,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:04:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:04:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:04:53,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 122 [2022-07-19 21:04:53,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,022 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:53,022 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 122 [2022-07-19 21:04:53,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:04:53,808 INFO L129 PetriNetUnfolder]: 2348/4410 cut-off events. [2022-07-19 21:04:53,809 INFO L130 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-07-19 21:04:53,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8672 conditions, 4410 events. 2348/4410 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 28839 event pairs, 690 based on Foata normal form. 42/4428 useless extension candidates. Maximal degree in co-relation 8639. Up to 2752 conditions per place. [2022-07-19 21:04:53,862 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 85 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2022-07-19 21:04:53,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 162 transitions, 586 flow [2022-07-19 21:04:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:04:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:04:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-19 21:04:53,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7201405152224825 [2022-07-19 21:04:53,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-19 21:04:53,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-19 21:04:53,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:04:53,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-19 21:04:53,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,872 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,872 INFO L186 Difference]: Start difference. First operand has 101 places, 96 transitions, 219 flow. Second operand 7 states and 615 transitions. [2022-07-19 21:04:53,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 162 transitions, 586 flow [2022-07-19 21:04:53,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 162 transitions, 582 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:04:53,880 INFO L242 Difference]: Finished difference. Result has 110 places, 110 transitions, 335 flow [2022-07-19 21:04:53,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=110, PETRI_TRANSITIONS=110} [2022-07-19 21:04:53,883 INFO L279 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2022-07-19 21:04:53,883 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 110 transitions, 335 flow [2022-07-19 21:04:53,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:53,884 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:53,884 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:04:53,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:04:53,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-19 21:04:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:53,886 INFO L85 PathProgramCache]: Analyzing trace with hash 657906234, now seen corresponding path program 1 times [2022-07-19 21:04:53,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:53,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937043368] [2022-07-19 21:04:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:53,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:53,931 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:04:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:04:53,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:04:53,951 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:04:53,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-19 21:04:53,951 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-19 21:04:53,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-19 21:04:53,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-19 21:04:53,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-19 21:04:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:04:53,953 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:04:53,953 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:04:53,954 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:04:54,007 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:04:54,014 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 165 places, 164 transitions, 370 flow [2022-07-19 21:04:54,041 INFO L129 PetriNetUnfolder]: 10/172 cut-off events. [2022-07-19 21:04:54,042 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:04:54,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 172 events. 10/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 414 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2022-07-19 21:04:54,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 164 transitions, 370 flow [2022-07-19 21:04:54,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 135 transitions, 294 flow [2022-07-19 21:04:54,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:04:54,057 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@6b942a77, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cec8af2 [2022-07-19 21:04:54,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-19 21:04:54,060 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2022-07-19 21:04:54,061 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:04:54,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:04:54,061 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] [2022-07-19 21:04:54,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:04:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:04:54,062 INFO L85 PathProgramCache]: Analyzing trace with hash 967602458, now seen corresponding path program 1 times [2022-07-19 21:04:54,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:04:54,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530770443] [2022-07-19 21:04:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:04:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:04:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:04:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:04:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:04:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530770443] [2022-07-19 21:04:54,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530770443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:04:54,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:04:54,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:04:54,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780324569] [2022-07-19 21:04:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:04:54,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:04:54,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:04:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:04:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:04:54,109 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 164 [2022-07-19 21:04:54,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 135 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:04:54,110 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:04:54,110 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 164 [2022-07-19 21:04:54,110 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:05:00,094 INFO L129 PetriNetUnfolder]: 32840/53020 cut-off events. [2022-07-19 21:05:00,095 INFO L130 PetriNetUnfolder]: For 5209/5209 co-relation queries the response was YES. [2022-07-19 21:05:00,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101267 conditions, 53020 events. 32840/53020 cut-off events. For 5209/5209 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 441001 event pairs, 16590 based on Foata normal form. 18958/69584 useless extension candidates. Maximal degree in co-relation 101235. Up to 44217 conditions per place. [2022-07-19 21:05:00,744 INFO L132 encePairwiseOnDemand]: 154/164 looper letters, 55 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2022-07-19 21:05:00,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 136 transitions, 426 flow [2022-07-19 21:05:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:05:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:05:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2022-07-19 21:05:00,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7195121951219512 [2022-07-19 21:05:00,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2022-07-19 21:05:00,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2022-07-19 21:05:00,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:05:00,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2022-07-19 21:05:00,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,751 INFO L186 Difference]: Start difference. First operand has 138 places, 135 transitions, 294 flow. Second operand 3 states and 354 transitions. [2022-07-19 21:05:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 136 transitions, 426 flow [2022-07-19 21:05:00,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 136 transitions, 417 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-19 21:05:00,758 INFO L242 Difference]: Finished difference. Result has 130 places, 125 transitions, 287 flow [2022-07-19 21:05:00,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2022-07-19 21:05:00,760 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, -8 predicate places. [2022-07-19 21:05:00,761 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 287 flow [2022-07-19 21:05:00,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,761 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:05:00,761 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] [2022-07-19 21:05:00,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:05:00,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:05:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:05:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1745396355, now seen corresponding path program 1 times [2022-07-19 21:05:00,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:05:00,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932380351] [2022-07-19 21:05:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:05:00,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:05:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:05:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:05:00,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:05:00,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932380351] [2022-07-19 21:05:00,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932380351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:05:00,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:05:00,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:05:00,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76216462] [2022-07-19 21:05:00,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:05:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:05:00,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:05:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:05:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:05:00,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 164 [2022-07-19 21:05:00,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 287 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:00,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:05:00,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 164 [2022-07-19 21:05:00,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:05:07,995 INFO L129 PetriNetUnfolder]: 49463/78236 cut-off events. [2022-07-19 21:05:07,995 INFO L130 PetriNetUnfolder]: For 10424/10424 co-relation queries the response was YES. [2022-07-19 21:05:08,479 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156806 conditions, 78236 events. 49463/78236 cut-off events. For 10424/10424 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 660636 event pairs, 18896 based on Foata normal form. 549/78708 useless extension candidates. Maximal degree in co-relation 156772. Up to 53003 conditions per place. [2022-07-19 21:05:09,169 INFO L132 encePairwiseOnDemand]: 150/164 looper letters, 138 selfloop transitions, 27 changer transitions 0/240 dead transitions. [2022-07-19 21:05:09,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 240 transitions, 914 flow [2022-07-19 21:05:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:05:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:05:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 818 transitions. [2022-07-19 21:05:09,173 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7125435540069687 [2022-07-19 21:05:09,173 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 818 transitions. [2022-07-19 21:05:09,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 818 transitions. [2022-07-19 21:05:09,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:05:09,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 818 transitions. [2022-07-19 21:05:09,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.85714285714286) internal successors, (818), 7 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:09,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 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) [2022-07-19 21:05:09,179 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 164.0) internal successors, (1312), 8 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) [2022-07-19 21:05:09,179 INFO L186 Difference]: Start difference. First operand has 130 places, 125 transitions, 287 flow. Second operand 7 states and 818 transitions. [2022-07-19 21:05:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 240 transitions, 914 flow [2022-07-19 21:05:09,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 240 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:05:09,189 INFO L242 Difference]: Finished difference. Result has 139 places, 148 transitions, 478 flow [2022-07-19 21:05:09,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=478, PETRI_PLACES=139, PETRI_TRANSITIONS=148} [2022-07-19 21:05:09,191 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 1 predicate places. [2022-07-19 21:05:09,193 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 148 transitions, 478 flow [2022-07-19 21:05:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:09,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:05:09,195 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] [2022-07-19 21:05:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:05:09,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:05:09,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:05:09,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1775861579, now seen corresponding path program 1 times [2022-07-19 21:05:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:05:09,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318329819] [2022-07-19 21:05:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:05:09,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:05:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:05:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:05:09,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:05:09,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318329819] [2022-07-19 21:05:09,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318329819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:05:09,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:05:09,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:05:09,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850976254] [2022-07-19 21:05:09,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:05:09,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:05:09,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:05:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:05:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:05:09,283 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 164 [2022-07-19 21:05:09,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 148 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:09,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:05:09,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 164 [2022-07-19 21:05:09,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:05:19,762 INFO L129 PetriNetUnfolder]: 67933/105578 cut-off events. [2022-07-19 21:05:19,762 INFO L130 PetriNetUnfolder]: For 62524/62524 co-relation queries the response was YES. [2022-07-19 21:05:20,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259239 conditions, 105578 events. 67933/105578 cut-off events. For 62524/62524 co-relation queries the response was YES. Maximal size of possible extension queue 2910. Compared 906835 event pairs, 18659 based on Foata normal form. 915/106355 useless extension candidates. Maximal degree in co-relation 259200. Up to 57697 conditions per place. [2022-07-19 21:05:21,252 INFO L132 encePairwiseOnDemand]: 147/164 looper letters, 233 selfloop transitions, 56 changer transitions 0/363 dead transitions. [2022-07-19 21:05:21,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 363 transitions, 1752 flow [2022-07-19 21:05:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:05:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:05:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1303 transitions. [2022-07-19 21:05:21,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7222838137472284 [2022-07-19 21:05:21,256 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1303 transitions. [2022-07-19 21:05:21,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1303 transitions. [2022-07-19 21:05:21,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:05:21,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1303 transitions. [2022-07-19 21:05:21,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.45454545454545) internal successors, (1303), 11 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:21,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:21,264 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 164.0) internal successors, (1968), 12 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:21,264 INFO L186 Difference]: Start difference. First operand has 139 places, 148 transitions, 478 flow. Second operand 11 states and 1303 transitions. [2022-07-19 21:05:21,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 363 transitions, 1752 flow [2022-07-19 21:05:21,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 363 transitions, 1734 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 21:05:21,330 INFO L242 Difference]: Finished difference. Result has 152 places, 177 transitions, 825 flow [2022-07-19 21:05:21,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=825, PETRI_PLACES=152, PETRI_TRANSITIONS=177} [2022-07-19 21:05:21,331 INFO L279 CegarLoopForPetriNet]: 138 programPoint places, 14 predicate places. [2022-07-19 21:05:21,331 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 177 transitions, 825 flow [2022-07-19 21:05:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:21,331 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:05:21,332 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:05:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:05:21,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-19 21:05:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:05:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1928957350, now seen corresponding path program 1 times [2022-07-19 21:05:21,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:05:21,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693961519] [2022-07-19 21:05:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:05:21,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:05:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:05:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 21:05:21,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:05:21,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693961519] [2022-07-19 21:05:21,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693961519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:05:21,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:05:21,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:05:21,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348936567] [2022-07-19 21:05:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:05:21,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:05:21,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:05:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:05:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:05:21,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 164 [2022-07-19 21:05:21,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 177 transitions, 825 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:05:21,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:05:21,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 164 [2022-07-19 21:05:21,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand