./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/indexer.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/indexer.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 f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:57:01,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:57:01,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:57:01,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:57:01,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:57:01,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:57:01,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:57:01,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:57:01,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:57:01,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:57:01,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:57:01,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:57:01,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:57:01,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:57:01,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:57:01,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:57:01,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:57:01,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:57:01,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:57:01,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:57:01,982 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:57:01,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:57:01,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:57:01,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:57:01,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:57:01,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:57:01,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:57:01,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:57:01,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:57:01,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:57:01,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:57:01,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:57:01,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:57:01,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:57:01,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:57:01,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:57:01,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:57:01,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:57:01,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:57:01,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:57:01,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:57:02,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:57:02,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:57:02,024 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:57:02,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:57:02,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:57:02,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:57:02,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:57:02,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:57:02,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:57:02,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:57:02,026 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:57:02,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:57:02,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:57:02,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:57:02,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:57:02,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:57:02,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:57:02,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:57:02,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:57:02,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:57:02,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:57:02,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:57:02,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:57:02,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:57:02,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:57:02,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:57:02,030 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:57:02,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:57:02,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:57:02,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f24afaadf07ead7c7da85cf6020fd6a6a5b5585e439441b5111a2dea2e7cec4c [2022-07-19 20:57:02,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:57:02,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:57:02,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:57:02,257 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:57:02,257 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:57:02,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/indexer.i [2022-07-19 20:57:02,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05962f03/5b53e84ff39440cc860850ee693ab2c9/FLAGa79d7c37b [2022-07-19 20:57:02,760 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:57:02,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/indexer.i [2022-07-19 20:57:02,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05962f03/5b53e84ff39440cc860850ee693ab2c9/FLAGa79d7c37b [2022-07-19 20:57:03,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05962f03/5b53e84ff39440cc860850ee693ab2c9 [2022-07-19 20:57:03,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:57:03,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:57:03,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:57:03,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:57:03,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:57:03,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b70669b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03, skipping insertion in model container [2022-07-19 20:57:03,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:57:03,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:57:03,605 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/indexer.i[47556,47569] [2022-07-19 20:57:03,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:57:03,648 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:57:03,670 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/indexer.i[47556,47569] [2022-07-19 20:57:03,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:57:03,711 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:57:03,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03 WrapperNode [2022-07-19 20:57:03,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:57:03,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:57:03,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:57:03,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:57:03,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,761 INFO L137 Inliner]: procedures = 269, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2022-07-19 20:57:03,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:57:03,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:57:03,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:57:03,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:57:03,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:57:03,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:57:03,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:57:03,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:57:03,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (1/1) ... [2022-07-19 20:57:03,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:57:03,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:03,839 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 20:57:03,844 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 20:57:03,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 20:57:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 20:57:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 20:57:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2022-07-19 20:57:03,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2022-07-19 20:57:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 20:57:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 20:57:03,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:57:03,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:57:03,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:57:03,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:57:03,871 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 20:57:03,947 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:57:03,949 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:57:04,106 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:57:04,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:57:04,111 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 20:57:04,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:57:04 BoogieIcfgContainer [2022-07-19 20:57:04,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:57:04,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:57:04,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:57:04,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:57:04,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:57:03" (1/3) ... [2022-07-19 20:57:04,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f465fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:57:04, skipping insertion in model container [2022-07-19 20:57:04,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:57:03" (2/3) ... [2022-07-19 20:57:04,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f465fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:57:04, skipping insertion in model container [2022-07-19 20:57:04,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:57:04" (3/3) ... [2022-07-19 20:57:04,119 INFO L111 eAbstractionObserver]: Analyzing ICFG indexer.i [2022-07-19 20:57:04,123 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 20:57:04,129 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:57:04,129 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 20:57:04,130 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 20:57:04,183 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 20:57:04,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 111 places, 122 transitions, 252 flow [2022-07-19 20:57:04,260 INFO L129 PetriNetUnfolder]: 18/146 cut-off events. [2022-07-19 20:57:04,260 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 20:57:04,264 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 146 events. 18/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 225 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 83. Up to 4 conditions per place. [2022-07-19 20:57:04,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 122 transitions, 252 flow [2022-07-19 20:57:04,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 117 transitions, 239 flow [2022-07-19 20:57:04,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:57:04,280 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@7b54891d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7be74d63 [2022-07-19 20:57:04,280 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 20:57:04,292 INFO L129 PetriNetUnfolder]: 11/95 cut-off events. [2022-07-19 20:57:04,293 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:57:04,294 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:04,295 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:04,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1973979282, now seen corresponding path program 1 times [2022-07-19 20:57:04,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:04,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366374536] [2022-07-19 20:57:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:04,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:04,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366374536] [2022-07-19 20:57:04,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366374536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:04,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:04,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:57:04,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576258386] [2022-07-19 20:57:04,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 20:57:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:04,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 20:57:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 20:57:04,520 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 122 [2022-07-19 20:57:04,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 239 flow. Second operand has 2 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 20:57:04,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:04,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 122 [2022-07-19 20:57:04,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:04,575 INFO L129 PetriNetUnfolder]: 6/129 cut-off events. [2022-07-19 20:57:04,575 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 20:57:04,577 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 129 events. 6/129 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 179 event pairs, 0 based on Foata normal form. 10/128 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-07-19 20:57:04,579 INFO L132 encePairwiseOnDemand]: 114/122 looper letters, 1 selfloop transitions, 0 changer transitions 0/108 dead transitions. [2022-07-19 20:57:04,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 223 flow [2022-07-19 20:57:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 20:57:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 20:57:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 231 transitions. [2022-07-19 20:57:04,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9467213114754098 [2022-07-19 20:57:04,594 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 231 transitions. [2022-07-19 20:57:04,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 231 transitions. [2022-07-19 20:57:04,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:04,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 231 transitions. [2022-07-19 20:57:04,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 20:57:04,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 20:57:04,610 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 20:57:04,612 INFO L186 Difference]: Start difference. First operand has 107 places, 117 transitions, 239 flow. Second operand 2 states and 231 transitions. [2022-07-19 20:57:04,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 223 flow [2022-07-19 20:57:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 108 transitions, 223 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:57:04,621 INFO L242 Difference]: Finished difference. Result has 107 places, 108 transitions, 221 flow [2022-07-19 20:57:04,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=221, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2022-07-19 20:57:04,625 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 0 predicate places. [2022-07-19 20:57:04,625 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 221 flow [2022-07-19 20:57:04,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 20:57:04,627 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:04,627 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:04,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:57:04,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1129507411, now seen corresponding path program 1 times [2022-07-19 20:57:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:04,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662675698] [2022-07-19 20:57:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:04,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:04,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662675698] [2022-07-19 20:57:04,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662675698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:57:04,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:57:04,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:57:04,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124899742] [2022-07-19 20:57:04,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:57:04,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:57:04,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:57:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:57:04,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 122 [2022-07-19 20:57:04,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 20:57:04,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:04,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 122 [2022-07-19 20:57:04,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:04,801 INFO L129 PetriNetUnfolder]: 4/105 cut-off events. [2022-07-19 20:57:04,802 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 20:57:04,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 105 events. 4/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 134. Up to 14 conditions per place. [2022-07-19 20:57:04,808 INFO L132 encePairwiseOnDemand]: 114/122 looper letters, 21 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-07-19 20:57:04,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 103 transitions, 263 flow [2022-07-19 20:57:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:57:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 20:57:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2022-07-19 20:57:04,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7759562841530054 [2022-07-19 20:57:04,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2022-07-19 20:57:04,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2022-07-19 20:57:04,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:04,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2022-07-19 20:57:04,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 20:57:04,818 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 20:57:04,818 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 20:57:04,819 INFO L186 Difference]: Start difference. First operand has 107 places, 108 transitions, 221 flow. Second operand 3 states and 284 transitions. [2022-07-19 20:57:04,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 103 transitions, 263 flow [2022-07-19 20:57:04,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 103 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 20:57:04,823 INFO L242 Difference]: Finished difference. Result has 99 places, 97 transitions, 220 flow [2022-07-19 20:57:04,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2022-07-19 20:57:04,824 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -8 predicate places. [2022-07-19 20:57:04,824 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 220 flow [2022-07-19 20:57:04,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states 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 20:57:04,825 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:04,826 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:04,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:57:04,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1175273194, now seen corresponding path program 1 times [2022-07-19 20:57:04,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:04,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381137110] [2022-07-19 20:57:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:04,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:04,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381137110] [2022-07-19 20:57:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381137110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:57:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873668810] [2022-07-19 20:57:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:04,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:04,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:57:04,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:57:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 20:57:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:57:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:05,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:57:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:05,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873668810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:57:05,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:57:05,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-19 20:57:05,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38393424] [2022-07-19 20:57:05,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:57:05,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 20:57:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 20:57:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 20:57:05,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-19 20:57:05,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:57:05,126 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:05,126 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-19 20:57:05,127 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:05,205 INFO L129 PetriNetUnfolder]: 4/112 cut-off events. [2022-07-19 20:57:05,206 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 20:57:05,206 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 112 events. 4/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 160. Up to 12 conditions per place. [2022-07-19 20:57:05,206 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 21 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2022-07-19 20:57:05,207 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 316 flow [2022-07-19 20:57:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:57:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 20:57:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 876 transitions. [2022-07-19 20:57:05,209 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7180327868852459 [2022-07-19 20:57:05,209 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 876 transitions. [2022-07-19 20:57:05,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 876 transitions. [2022-07-19 20:57:05,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:05,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 876 transitions. [2022-07-19 20:57:05,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 87.6) internal successors, (876), 10 states have internal predecessors, (876), 0 states have call successors, (0), 0 states 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 20:57:05,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 20:57:05,213 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 122.0) internal successors, (1342), 11 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 20:57:05,213 INFO L186 Difference]: Start difference. First operand has 99 places, 97 transitions, 220 flow. Second operand 10 states and 876 transitions. [2022-07-19 20:57:05,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 316 flow [2022-07-19 20:57:05,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 110 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 20:57:05,216 INFO L242 Difference]: Finished difference. Result has 110 places, 104 transitions, 281 flow [2022-07-19 20:57:05,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=281, PETRI_PLACES=110, PETRI_TRANSITIONS=104} [2022-07-19 20:57:05,217 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 3 predicate places. [2022-07-19 20:57:05,217 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 281 flow [2022-07-19 20:57:05,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:57:05,217 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:05,218 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:05,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 20:57:05,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:05,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1677055178, now seen corresponding path program 2 times [2022-07-19 20:57:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286077480] [2022-07-19 20:57:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286077480] [2022-07-19 20:57:05,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286077480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:57:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452115483] [2022-07-19 20:57:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 20:57:05,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:05,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:05,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:57:05,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 20:57:05,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 20:57:05,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 20:57:05,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 20:57:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:57:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:05,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:57:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:05,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452115483] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:57:05,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:57:05,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-19 20:57:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214745579] [2022-07-19 20:57:05,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:57:05,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 20:57:05,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 20:57:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-19 20:57:05,741 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-19 20:57:05,743 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 281 flow. Second operand has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 20:57:05,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:05,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-19 20:57:05,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:05,918 INFO L129 PetriNetUnfolder]: 4/132 cut-off events. [2022-07-19 20:57:05,919 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-07-19 20:57:05,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 132 events. 4/132 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 4/132 useless extension candidates. Maximal degree in co-relation 254. Up to 13 conditions per place. [2022-07-19 20:57:05,920 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 29 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2022-07-19 20:57:05,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 130 transitions, 501 flow [2022-07-19 20:57:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 20:57:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-19 20:57:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1906 transitions. [2022-07-19 20:57:05,923 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.710134128166915 [2022-07-19 20:57:05,923 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1906 transitions. [2022-07-19 20:57:05,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1906 transitions. [2022-07-19 20:57:05,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:05,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1906 transitions. [2022-07-19 20:57:05,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.63636363636364) internal successors, (1906), 22 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states 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 20:57:05,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 122.0) internal successors, (2806), 23 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states 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 20:57:05,931 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 122.0) internal successors, (2806), 23 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states 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 20:57:05,931 INFO L186 Difference]: Start difference. First operand has 110 places, 104 transitions, 281 flow. Second operand 22 states and 1906 transitions. [2022-07-19 20:57:05,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 130 transitions, 501 flow [2022-07-19 20:57:05,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 130 transitions, 484 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-07-19 20:57:05,935 INFO L242 Difference]: Finished difference. Result has 135 places, 117 transitions, 414 flow [2022-07-19 20:57:05,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=414, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2022-07-19 20:57:05,936 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 28 predicate places. [2022-07-19 20:57:05,936 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 414 flow [2022-07-19 20:57:05,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.66666666666667) internal successors, (1560), 18 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 20:57:05,937 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:05,937 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:05,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 20:57:06,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 20:57:06,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:06,153 INFO L85 PathProgramCache]: Analyzing trace with hash 894994294, now seen corresponding path program 3 times [2022-07-19 20:57:06,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:06,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741155048] [2022-07-19 20:57:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:06,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741155048] [2022-07-19 20:57:06,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741155048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:57:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990988601] [2022-07-19 20:57:06,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 20:57:06,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:06,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:57:06,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 20:57:06,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 20:57:06,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 20:57:06,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 20:57:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:57:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:06,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:57:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:06,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990988601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:57:06,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:57:06,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-19 20:57:06,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432926431] [2022-07-19 20:57:06,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:57:06,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 20:57:06,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 20:57:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 20:57:06,694 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-19 20:57:06,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 414 flow. Second operand has 34 states, 34 states have (on average 86.58823529411765) internal successors, (2944), 34 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states 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 20:57:06,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:06,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-19 20:57:06,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:07,173 INFO L129 PetriNetUnfolder]: 4/172 cut-off events. [2022-07-19 20:57:07,173 INFO L130 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2022-07-19 20:57:07,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 172 events. 4/172 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 8/176 useless extension candidates. Maximal degree in co-relation 465. Up to 28 conditions per place. [2022-07-19 20:57:07,175 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 45 selfloop transitions, 49 changer transitions 0/170 dead transitions. [2022-07-19 20:57:07,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 922 flow [2022-07-19 20:57:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 20:57:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-07-19 20:57:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3966 transitions. [2022-07-19 20:57:07,181 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7066999287241625 [2022-07-19 20:57:07,181 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3966 transitions. [2022-07-19 20:57:07,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3966 transitions. [2022-07-19 20:57:07,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:07,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3966 transitions. [2022-07-19 20:57:07,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 86.21739130434783) internal successors, (3966), 46 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states 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 20:57:07,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 122.0) internal successors, (5734), 47 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states 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 20:57:07,212 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 122.0) internal successors, (5734), 47 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states 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 20:57:07,212 INFO L186 Difference]: Start difference. First operand has 135 places, 117 transitions, 414 flow. Second operand 46 states and 3966 transitions. [2022-07-19 20:57:07,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 922 flow [2022-07-19 20:57:07,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 170 transitions, 879 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-19 20:57:07,217 INFO L242 Difference]: Finished difference. Result has 183 places, 142 transitions, 701 flow [2022-07-19 20:57:07,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=701, PETRI_PLACES=183, PETRI_TRANSITIONS=142} [2022-07-19 20:57:07,218 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 76 predicate places. [2022-07-19 20:57:07,218 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 142 transitions, 701 flow [2022-07-19 20:57:07,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 86.58823529411765) internal successors, (2944), 34 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states 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 20:57:07,219 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:07,219 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:07,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 20:57:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:07,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1528078346, now seen corresponding path program 4 times [2022-07-19 20:57:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466402838] [2022-07-19 20:57:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:07,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466402838] [2022-07-19 20:57:07,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466402838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:57:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318038871] [2022-07-19 20:57:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 20:57:07,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:07,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:57:07,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:57:07,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 20:57:07,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 20:57:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 20:57:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:57:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:08,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:57:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:08,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318038871] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:57:08,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:57:08,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-07-19 20:57:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933100309] [2022-07-19 20:57:08,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:57:08,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-19 20:57:08,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:08,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-19 20:57:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 20:57:08,808 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-19 20:57:08,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 142 transitions, 701 flow. Second operand has 66 states, 66 states have (on average 86.54545454545455) internal successors, (5712), 66 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states 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 20:57:08,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:08,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-19 20:57:08,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:10,326 INFO L129 PetriNetUnfolder]: 4/252 cut-off events. [2022-07-19 20:57:10,326 INFO L130 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-07-19 20:57:10,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 252 events. 4/252 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 16/264 useless extension candidates. Maximal degree in co-relation 955. Up to 58 conditions per place. [2022-07-19 20:57:10,327 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 77 selfloop transitions, 97 changer transitions 0/250 dead transitions. [2022-07-19 20:57:10,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 250 transitions, 1901 flow [2022-07-19 20:57:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 20:57:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 20:57:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 8002 transitions. [2022-07-19 20:57:10,337 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.705270579940067 [2022-07-19 20:57:10,337 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 8002 transitions. [2022-07-19 20:57:10,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 8002 transitions. [2022-07-19 20:57:10,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:10,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 8002 transitions. [2022-07-19 20:57:10,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 86.04301075268818) internal successors, (8002), 93 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states 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 20:57:10,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 122.0) internal successors, (11468), 94 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states 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 20:57:10,365 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 122.0) internal successors, (11468), 94 states have internal predecessors, (11468), 0 states have call successors, (0), 0 states 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 20:57:10,366 INFO L186 Difference]: Start difference. First operand has 183 places, 142 transitions, 701 flow. Second operand 93 states and 8002 transitions. [2022-07-19 20:57:10,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 250 transitions, 1901 flow [2022-07-19 20:57:10,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 250 transitions, 1810 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-07-19 20:57:10,375 INFO L242 Difference]: Finished difference. Result has 274 places, 191 transitions, 1344 flow [2022-07-19 20:57:10,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=1344, PETRI_PLACES=274, PETRI_TRANSITIONS=191} [2022-07-19 20:57:10,376 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 167 predicate places. [2022-07-19 20:57:10,376 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 191 transitions, 1344 flow [2022-07-19 20:57:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 86.54545454545455) internal successors, (5712), 66 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states 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 20:57:10,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:10,378 INFO L200 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:10,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 20:57:10,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:10,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash 665424118, now seen corresponding path program 5 times [2022-07-19 20:57:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:10,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930051242] [2022-07-19 20:57:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930051242] [2022-07-19 20:57:11,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930051242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:57:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204188563] [2022-07-19 20:57:11,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 20:57:11,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:11,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:11,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:57:11,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 20:57:16,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-07-19 20:57:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 20:57:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 20:57:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:57:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:16,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:57:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:18,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204188563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:57:18,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:57:18,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-07-19 20:57:18,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018992244] [2022-07-19 20:57:18,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:57:18,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-07-19 20:57:18,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:57:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-07-19 20:57:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 20:57:18,704 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 122 [2022-07-19 20:57:18,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 191 transitions, 1344 flow. Second operand has 130 states, 130 states have (on average 86.52307692307693) internal successors, (11248), 130 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states 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 20:57:18,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 20:57:18,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 122 [2022-07-19 20:57:18,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 20:57:23,161 INFO L129 PetriNetUnfolder]: 4/412 cut-off events. [2022-07-19 20:57:23,161 INFO L130 PetriNetUnfolder]: For 16833/16833 co-relation queries the response was YES. [2022-07-19 20:57:23,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 412 events. 4/412 cut-off events. For 16833/16833 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 32/440 useless extension candidates. Maximal degree in co-relation 2085. Up to 122 conditions per place. [2022-07-19 20:57:23,164 INFO L132 encePairwiseOnDemand]: 112/122 looper letters, 141 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2022-07-19 20:57:23,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 410 transitions, 4160 flow [2022-07-19 20:57:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-07-19 20:57:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2022-07-19 20:57:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 16242 transitions. [2022-07-19 20:57:23,205 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7043976060369503 [2022-07-19 20:57:23,206 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 16242 transitions. [2022-07-19 20:57:23,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 16242 transitions. [2022-07-19 20:57:23,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 20:57:23,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 16242 transitions. [2022-07-19 20:57:23,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 190 states, 189 states have (on average 85.93650793650794) internal successors, (16242), 189 states have internal predecessors, (16242), 0 states have call successors, (0), 0 states 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 20:57:23,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 190 states, 190 states have (on average 122.0) internal successors, (23180), 190 states have internal predecessors, (23180), 0 states have call successors, (0), 0 states 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 20:57:23,274 INFO L81 ComplementDD]: Finished complementDD. Result has 190 states, 190 states have (on average 122.0) internal successors, (23180), 190 states have internal predecessors, (23180), 0 states have call successors, (0), 0 states 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 20:57:23,274 INFO L186 Difference]: Start difference. First operand has 274 places, 191 transitions, 1344 flow. Second operand 189 states and 16242 transitions. [2022-07-19 20:57:23,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 410 transitions, 4160 flow [2022-07-19 20:57:23,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 410 transitions, 3972 flow, removed 50 selfloop flow, removed 42 redundant places. [2022-07-19 20:57:23,302 INFO L242 Difference]: Finished difference. Result has 453 places, 288 transitions, 2790 flow [2022-07-19 20:57:23,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=189, PETRI_FLOW=2790, PETRI_PLACES=453, PETRI_TRANSITIONS=288} [2022-07-19 20:57:23,304 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 346 predicate places. [2022-07-19 20:57:23,304 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 288 transitions, 2790 flow [2022-07-19 20:57:23,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 86.52307692307693) internal successors, (11248), 130 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states 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 20:57:23,307 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 20:57:23,307 INFO L200 CegarLoopForPetriNet]: trace histogram [63, 63, 63, 63, 63, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:57:23,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 20:57:23,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:23,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:57:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:57:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash -108530954, now seen corresponding path program 6 times [2022-07-19 20:57:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:57:23,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502529515] [2022-07-19 20:57:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:57:23,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:57:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:57:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9834 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 20:57:27,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:57:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502529515] [2022-07-19 20:57:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502529515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:57:27,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213083757] [2022-07-19 20:57:27,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 20:57:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:57:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:57:27,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:57:27,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process