./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:40:15,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:40:15,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:40:15,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:40:15,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:40:15,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:40:15,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:40:15,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:40:15,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:40:15,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:40:15,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:40:15,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:40:15,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:40:15,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:40:15,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:40:15,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:40:15,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:40:15,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:40:15,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:40:15,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:40:15,967 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:40:15,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:40:15,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:40:15,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:40:15,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:40:15,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:40:15,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:40:15,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:40:15,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:40:15,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:40:15,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:40:15,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:40:15,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:40:15,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:40:15,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:40:15,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:40:15,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:40:15,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:40:15,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:40:15,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:40:15,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:40:15,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:40:15,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:40:16,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:40:16,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:40:16,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:40:16,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:40:16,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:40:16,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:40:16,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:40:16,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:40:16,011 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:40:16,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:40:16,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:40:16,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:40:16,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:40:16,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:40:16,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:40:16,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:40:16,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:40:16,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:40:16,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:40:16,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:40:16,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:40:16,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:40:16,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:40:16,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:40:16,016 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:40:16,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:40:16,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:40:16,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad [2022-07-12 10:40:16,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:40:16,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:40:16,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:40:16,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:40:16,233 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:40:16,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-07-12 10:40:16,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2422f71/3242bb8181bd4ea8b8245c82f98f73bf/FLAGa633baf7f [2022-07-12 10:40:16,649 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:40:16,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-07-12 10:40:16,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2422f71/3242bb8181bd4ea8b8245c82f98f73bf/FLAGa633baf7f [2022-07-12 10:40:16,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2422f71/3242bb8181bd4ea8b8245c82f98f73bf [2022-07-12 10:40:16,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:40:16,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:40:16,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:40:16,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:40:16,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:40:16,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:40:16" (1/1) ... [2022-07-12 10:40:16,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0619f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:16, skipping insertion in model container [2022-07-12 10:40:16,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:40:16" (1/1) ... [2022-07-12 10:40:16,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:40:16,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:40:16,938 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-07-12 10:40:16,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:40:16,961 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:40:16,986 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-07-12 10:40:16,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:40:17,008 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:40:17,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17 WrapperNode [2022-07-12 10:40:17,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:40:17,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:40:17,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:40:17,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:40:17,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,061 INFO L137 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 232 [2022-07-12 10:40:17,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:40:17,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:40:17,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:40:17,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:40:17,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:40:17,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:40:17,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:40:17,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:40:17,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (1/1) ... [2022-07-12 10:40:17,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:40:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:17,143 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) [2022-07-12 10:40:17,145 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 [2022-07-12 10:40:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:40:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:40:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:40:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:40:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:40:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-12 10:40:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-12 10:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:40:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:40:17,174 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:40:17,256 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:40:17,257 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:40:17,621 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:40:17,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:40:17,697 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-12 10:40:17,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:40:17 BoogieIcfgContainer [2022-07-12 10:40:17,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:40:17,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:40:17,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:40:17,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:40:17,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:40:16" (1/3) ... [2022-07-12 10:40:17,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a7476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:40:17, skipping insertion in model container [2022-07-12 10:40:17,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:40:17" (2/3) ... [2022-07-12 10:40:17,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a7476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:40:17, skipping insertion in model container [2022-07-12 10:40:17,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:40:17" (3/3) ... [2022-07-12 10:40:17,707 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2022-07-12 10:40:17,711 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:40:17,717 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:40:17,717 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:40:17,717 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:40:17,778 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:40:17,819 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 298 places, 315 transitions, 654 flow [2022-07-12 10:40:17,953 INFO L129 PetriNetUnfolder]: 27/312 cut-off events. [2022-07-12 10:40:17,954 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:40:17,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 312 events. 27/312 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 203 event pairs, 0 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 244. Up to 3 conditions per place. [2022-07-12 10:40:17,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 298 places, 315 transitions, 654 flow [2022-07-12 10:40:17,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 284 places, 301 transitions, 620 flow [2022-07-12 10:40:17,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:40:17,986 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@49523edd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@682ef8ee [2022-07-12 10:40:17,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-12 10:40:18,026 INFO L129 PetriNetUnfolder]: 27/300 cut-off events. [2022-07-12 10:40:18,026 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:40:18,027 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:18,028 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:18,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 536450808, now seen corresponding path program 1 times [2022-07-12 10:40:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:18,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152300254] [2022-07-12 10:40:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152300254] [2022-07-12 10:40:18,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152300254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:18,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:18,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:40:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556992033] [2022-07-12 10:40:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:18,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:40:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:40:18,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:40:18,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 315 [2022-07-12 10:40:18,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 301 transitions, 620 flow. Second operand has 2 states, 2 states have (on average 292.5) internal successors, (585), 2 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:18,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 315 [2022-07-12 10:40:18,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:18,391 INFO L129 PetriNetUnfolder]: 22/329 cut-off events. [2022-07-12 10:40:18,391 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-12 10:40:18,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 329 events. 22/329 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 382 event pairs, 7 based on Foata normal form. 36/338 useless extension candidates. Maximal degree in co-relation 233. Up to 28 conditions per place. [2022-07-12 10:40:18,394 INFO L132 encePairwiseOnDemand]: 297/315 looper letters, 8 selfloop transitions, 0 changer transitions 12/283 dead transitions. [2022-07-12 10:40:18,394 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 283 transitions, 600 flow [2022-07-12 10:40:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:40:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:40:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 602 transitions. [2022-07-12 10:40:18,408 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9555555555555556 [2022-07-12 10:40:18,409 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 602 transitions. [2022-07-12 10:40:18,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 602 transitions. [2022-07-12 10:40:18,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:18,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 602 transitions. [2022-07-12 10:40:18,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 301.0) internal successors, (602), 2 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,423 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,425 INFO L186 Difference]: Start difference. First operand has 284 places, 301 transitions, 620 flow. Second operand 2 states and 602 transitions. [2022-07-12 10:40:18,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 283 transitions, 600 flow [2022-07-12 10:40:18,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 283 transitions, 588 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:40:18,432 INFO L242 Difference]: Finished difference. Result has 279 places, 271 transitions, 548 flow [2022-07-12 10:40:18,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=548, PETRI_PLACES=279, PETRI_TRANSITIONS=271} [2022-07-12 10:40:18,436 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, -5 predicate places. [2022-07-12 10:40:18,436 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 271 transitions, 548 flow [2022-07-12 10:40:18,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 292.5) internal successors, (585), 2 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:18,437 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:18,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:40:18,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash 759378185, now seen corresponding path program 1 times [2022-07-12 10:40:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461742144] [2022-07-12 10:40:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:18,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:18,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461742144] [2022-07-12 10:40:18,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461742144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:18,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:18,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:40:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358319455] [2022-07-12 10:40:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:18,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:40:18,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:40:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:40:18,749 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 315 [2022-07-12 10:40:18,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 271 transitions, 548 flow. Second operand has 8 states, 8 states have (on average 199.625) internal successors, (1597), 8 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:18,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:18,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 315 [2022-07-12 10:40:18,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:19,025 INFO L129 PetriNetUnfolder]: 202/783 cut-off events. [2022-07-12 10:40:19,026 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-12 10:40:19,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1157 conditions, 783 events. 202/783 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3255 event pairs, 103 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1154. Up to 333 conditions per place. [2022-07-12 10:40:19,032 INFO L132 encePairwiseOnDemand]: 297/315 looper letters, 91 selfloop transitions, 15 changer transitions 0/283 dead transitions. [2022-07-12 10:40:19,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 283 transitions, 784 flow [2022-07-12 10:40:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:40:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:40:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1629 transitions. [2022-07-12 10:40:19,036 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2022-07-12 10:40:19,036 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1629 transitions. [2022-07-12 10:40:19,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1629 transitions. [2022-07-12 10:40:19,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:19,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1629 transitions. [2022-07-12 10:40:19,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 203.625) internal successors, (1629), 8 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,047 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 315.0) internal successors, (2835), 9 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,047 INFO L186 Difference]: Start difference. First operand has 279 places, 271 transitions, 548 flow. Second operand 8 states and 1629 transitions. [2022-07-12 10:40:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 283 transitions, 784 flow [2022-07-12 10:40:19,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 283 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:40:19,056 INFO L242 Difference]: Finished difference. Result has 275 places, 274 transitions, 602 flow [2022-07-12 10:40:19,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=602, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2022-07-12 10:40:19,058 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, -9 predicate places. [2022-07-12 10:40:19,058 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 602 flow [2022-07-12 10:40:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 199.625) internal successors, (1597), 8 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,059 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:19,059 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:19,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:40:19,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 495354362, now seen corresponding path program 1 times [2022-07-12 10:40:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196301394] [2022-07-12 10:40:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:40:19,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:19,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196301394] [2022-07-12 10:40:19,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196301394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:40:19,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:40:19,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:40:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552703095] [2022-07-12 10:40:19,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:19,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:40:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:40:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:40:19,449 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 315 [2022-07-12 10:40:19,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 602 flow. Second operand has 21 states, 21 states have (on average 174.85714285714286) internal successors, (3672), 21 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:19,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:19,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 315 [2022-07-12 10:40:19,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:20,588 INFO L129 PetriNetUnfolder]: 765/2564 cut-off events. [2022-07-12 10:40:20,589 INFO L130 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-07-12 10:40:20,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3691 conditions, 2564 events. 765/2564 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 18212 event pairs, 101 based on Foata normal form. 2/2208 useless extension candidates. Maximal degree in co-relation 3686. Up to 282 conditions per place. [2022-07-12 10:40:20,605 INFO L132 encePairwiseOnDemand]: 285/315 looper letters, 146 selfloop transitions, 31 changer transitions 20/357 dead transitions. [2022-07-12 10:40:20,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 357 transitions, 1173 flow [2022-07-12 10:40:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 10:40:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-12 10:40:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5638 transitions. [2022-07-12 10:40:20,615 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5593253968253968 [2022-07-12 10:40:20,616 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5638 transitions. [2022-07-12 10:40:20,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5638 transitions. [2022-07-12 10:40:20,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:20,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5638 transitions. [2022-07-12 10:40:20,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 176.1875) internal successors, (5638), 32 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,665 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,665 INFO L186 Difference]: Start difference. First operand has 275 places, 274 transitions, 602 flow. Second operand 32 states and 5638 transitions. [2022-07-12 10:40:20,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 357 transitions, 1173 flow [2022-07-12 10:40:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 357 transitions, 1149 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-12 10:40:20,671 INFO L242 Difference]: Finished difference. Result has 307 places, 285 transitions, 703 flow [2022-07-12 10:40:20,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=703, PETRI_PLACES=307, PETRI_TRANSITIONS=285} [2022-07-12 10:40:20,673 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 23 predicate places. [2022-07-12 10:40:20,673 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 285 transitions, 703 flow [2022-07-12 10:40:20,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 174.85714285714286) internal successors, (3672), 21 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,674 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:20,674 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:20,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:40:20,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1874260241, now seen corresponding path program 1 times [2022-07-12 10:40:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319340015] [2022-07-12 10:40:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:20,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:40:20,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319340015] [2022-07-12 10:40:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319340015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816987439] [2022-07-12 10:40:20,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:20,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:20,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:20,816 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) [2022-07-12 10:40:20,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:40:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:20,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:40:20,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:40:21,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:40:21,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816987439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:21,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:21,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:40:21,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057799556] [2022-07-12 10:40:21,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:21,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:40:21,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:40:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:40:21,511 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 315 [2022-07-12 10:40:21,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 285 transitions, 703 flow. Second operand has 19 states, 19 states have (on average 240.26315789473685) internal successors, (4565), 19 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:21,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:21,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 315 [2022-07-12 10:40:21,515 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:22,399 INFO L129 PetriNetUnfolder]: 1489/3795 cut-off events. [2022-07-12 10:40:22,399 INFO L130 PetriNetUnfolder]: For 445/539 co-relation queries the response was YES. [2022-07-12 10:40:22,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6396 conditions, 3795 events. 1489/3795 cut-off events. For 445/539 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 24224 event pairs, 585 based on Foata normal form. 6/2910 useless extension candidates. Maximal degree in co-relation 6384. Up to 1092 conditions per place. [2022-07-12 10:40:22,420 INFO L132 encePairwiseOnDemand]: 286/315 looper letters, 133 selfloop transitions, 54 changer transitions 0/407 dead transitions. [2022-07-12 10:40:22,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 407 transitions, 1375 flow [2022-07-12 10:40:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:40:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 10:40:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4907 transitions. [2022-07-12 10:40:22,429 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7788888888888889 [2022-07-12 10:40:22,429 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4907 transitions. [2022-07-12 10:40:22,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4907 transitions. [2022-07-12 10:40:22,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:22,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4907 transitions. [2022-07-12 10:40:22,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 245.35) internal successors, (4907), 20 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:22,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:22,448 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:22,448 INFO L186 Difference]: Start difference. First operand has 307 places, 285 transitions, 703 flow. Second operand 20 states and 4907 transitions. [2022-07-12 10:40:22,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 407 transitions, 1375 flow [2022-07-12 10:40:22,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 407 transitions, 1331 flow, removed 5 selfloop flow, removed 21 redundant places. [2022-07-12 10:40:22,458 INFO L242 Difference]: Finished difference. Result has 307 places, 322 transitions, 974 flow [2022-07-12 10:40:22,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=974, PETRI_PLACES=307, PETRI_TRANSITIONS=322} [2022-07-12 10:40:22,460 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 23 predicate places. [2022-07-12 10:40:22,460 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 322 transitions, 974 flow [2022-07-12 10:40:22,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 240.26315789473685) internal successors, (4565), 19 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:22,471 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:22,471 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:22,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:22,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:22,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1613456199, now seen corresponding path program 1 times [2022-07-12 10:40:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:22,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028170386] [2022-07-12 10:40:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:40:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028170386] [2022-07-12 10:40:22,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028170386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081550098] [2022-07-12 10:40:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:22,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:22,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:22,820 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) [2022-07-12 10:40:22,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:40:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:40:22,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:40:23,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:40:23,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081550098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:23,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:23,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:40:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499174626] [2022-07-12 10:40:23,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:40:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:40:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:40:23,279 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 315 [2022-07-12 10:40:23,282 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 322 transitions, 974 flow. Second operand has 19 states, 19 states have (on average 237.31578947368422) internal successors, (4509), 19 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:23,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:23,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 315 [2022-07-12 10:40:23,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:24,262 INFO L129 PetriNetUnfolder]: 1561/3928 cut-off events. [2022-07-12 10:40:24,262 INFO L130 PetriNetUnfolder]: For 1442/1563 co-relation queries the response was YES. [2022-07-12 10:40:24,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7701 conditions, 3928 events. 1561/3928 cut-off events. For 1442/1563 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 25958 event pairs, 773 based on Foata normal form. 35/3331 useless extension candidates. Maximal degree in co-relation 7683. Up to 1568 conditions per place. [2022-07-12 10:40:24,285 INFO L132 encePairwiseOnDemand]: 286/315 looper letters, 72 selfloop transitions, 30 changer transitions 89/408 dead transitions. [2022-07-12 10:40:24,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 408 transitions, 1642 flow [2022-07-12 10:40:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:40:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 10:40:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4847 transitions. [2022-07-12 10:40:24,292 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7693650793650794 [2022-07-12 10:40:24,292 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4847 transitions. [2022-07-12 10:40:24,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4847 transitions. [2022-07-12 10:40:24,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:24,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4847 transitions. [2022-07-12 10:40:24,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 242.35) internal successors, (4847), 20 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:24,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:24,308 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:24,308 INFO L186 Difference]: Start difference. First operand has 307 places, 322 transitions, 974 flow. Second operand 20 states and 4847 transitions. [2022-07-12 10:40:24,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 408 transitions, 1642 flow [2022-07-12 10:40:24,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 408 transitions, 1605 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-12 10:40:24,317 INFO L242 Difference]: Finished difference. Result has 327 places, 297 transitions, 872 flow [2022-07-12 10:40:24,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=872, PETRI_PLACES=327, PETRI_TRANSITIONS=297} [2022-07-12 10:40:24,318 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 43 predicate places. [2022-07-12 10:40:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 297 transitions, 872 flow [2022-07-12 10:40:24,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 237.31578947368422) internal successors, (4509), 19 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:24,319 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:24,319 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:24,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:24,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:24,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 631866536, now seen corresponding path program 2 times [2022-07-12 10:40:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840140059] [2022-07-12 10:40:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 10:40:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840140059] [2022-07-12 10:40:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840140059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732502677] [2022-07-12 10:40:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:40:24,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:24,652 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) [2022-07-12 10:40:24,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:40:24,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:40:24,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:40:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 10:40:24,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 10:40:25,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732502677] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:25,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:40:25,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-07-12 10:40:25,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218804576] [2022-07-12 10:40:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:40:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:40:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:40:25,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 315 [2022-07-12 10:40:25,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 297 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 243.55555555555554) internal successors, (2192), 9 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:25,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:25,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 315 [2022-07-12 10:40:25,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:25,453 INFO L129 PetriNetUnfolder]: 826/1975 cut-off events. [2022-07-12 10:40:25,455 INFO L130 PetriNetUnfolder]: For 1591/1642 co-relation queries the response was YES. [2022-07-12 10:40:25,460 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 1975 events. 826/1975 cut-off events. For 1591/1642 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11574 event pairs, 220 based on Foata normal form. 2/1706 useless extension candidates. Maximal degree in co-relation 4604. Up to 701 conditions per place. [2022-07-12 10:40:25,467 INFO L132 encePairwiseOnDemand]: 304/315 looper letters, 78 selfloop transitions, 10 changer transitions 0/309 dead transitions. [2022-07-12 10:40:25,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 309 transitions, 1100 flow [2022-07-12 10:40:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:40:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:40:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2444 transitions. [2022-07-12 10:40:25,471 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7758730158730158 [2022-07-12 10:40:25,471 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2444 transitions. [2022-07-12 10:40:25,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2444 transitions. [2022-07-12 10:40:25,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:25,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2444 transitions. [2022-07-12 10:40:25,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 244.4) internal successors, (2444), 10 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:25,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:25,480 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:25,480 INFO L186 Difference]: Start difference. First operand has 327 places, 297 transitions, 872 flow. Second operand 10 states and 2444 transitions. [2022-07-12 10:40:25,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 309 transitions, 1100 flow [2022-07-12 10:40:25,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 309 transitions, 1019 flow, removed 17 selfloop flow, removed 18 redundant places. [2022-07-12 10:40:25,490 INFO L242 Difference]: Finished difference. Result has 303 places, 299 transitions, 840 flow [2022-07-12 10:40:25,490 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=840, PETRI_PLACES=303, PETRI_TRANSITIONS=299} [2022-07-12 10:40:25,493 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 19 predicate places. [2022-07-12 10:40:25,493 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 299 transitions, 840 flow [2022-07-12 10:40:25,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 243.55555555555554) internal successors, (2192), 9 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:25,494 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:25,494 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:25,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:25,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1786427132, now seen corresponding path program 1 times [2022-07-12 10:40:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:25,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707119219] [2022-07-12 10:40:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:40:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707119219] [2022-07-12 10:40:25,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707119219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457816581] [2022-07-12 10:40:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:25,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:25,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:25,808 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) [2022-07-12 10:40:25,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:40:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:40:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:40:26,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:40:26,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457816581] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:26,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:40:26,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-07-12 10:40:26,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444467123] [2022-07-12 10:40:26,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:26,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:40:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:40:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:40:26,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 315 [2022-07-12 10:40:26,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 299 transitions, 840 flow. Second operand has 9 states, 9 states have (on average 239.77777777777777) internal successors, (2158), 9 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:26,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:26,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 315 [2022-07-12 10:40:26,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:26,942 INFO L129 PetriNetUnfolder]: 1352/3191 cut-off events. [2022-07-12 10:40:26,942 INFO L130 PetriNetUnfolder]: For 1676/2026 co-relation queries the response was YES. [2022-07-12 10:40:26,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 3191 events. 1352/3191 cut-off events. For 1676/2026 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 21777 event pairs, 315 based on Foata normal form. 379/3354 useless extension candidates. Maximal degree in co-relation 6959. Up to 1235 conditions per place. [2022-07-12 10:40:26,971 INFO L132 encePairwiseOnDemand]: 304/315 looper letters, 85 selfloop transitions, 10 changer transitions 0/312 dead transitions. [2022-07-12 10:40:26,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 312 transitions, 1080 flow [2022-07-12 10:40:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:40:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:40:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2409 transitions. [2022-07-12 10:40:26,976 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7647619047619048 [2022-07-12 10:40:26,976 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2409 transitions. [2022-07-12 10:40:26,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2409 transitions. [2022-07-12 10:40:26,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:26,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2409 transitions. [2022-07-12 10:40:26,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 240.9) internal successors, (2409), 10 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:26,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:26,986 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:26,986 INFO L186 Difference]: Start difference. First operand has 303 places, 299 transitions, 840 flow. Second operand 10 states and 2409 transitions. [2022-07-12 10:40:26,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 312 transitions, 1080 flow [2022-07-12 10:40:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 312 transitions, 1069 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-12 10:40:26,997 INFO L242 Difference]: Finished difference. Result has 310 places, 300 transitions, 863 flow [2022-07-12 10:40:26,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=863, PETRI_PLACES=310, PETRI_TRANSITIONS=300} [2022-07-12 10:40:26,998 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 26 predicate places. [2022-07-12 10:40:26,998 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 300 transitions, 863 flow [2022-07-12 10:40:26,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 239.77777777777777) internal successors, (2158), 9 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:26,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:26,999 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:27,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 10:40:27,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:27,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1033487614, now seen corresponding path program 1 times [2022-07-12 10:40:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:27,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687780670] [2022-07-12 10:40:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:27,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:40:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:27,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687780670] [2022-07-12 10:40:27,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687780670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:27,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227167965] [2022-07-12 10:40:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:27,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:27,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:27,319 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) [2022-07-12 10:40:27,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:40:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:40:27,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:40:27,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 10:40:27,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227167965] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:27,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:40:27,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-07-12 10:40:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938534673] [2022-07-12 10:40:27,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:40:27,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 10:40:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 10:40:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:40:27,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 315 [2022-07-12 10:40:27,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 300 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 242.66666666666666) internal successors, (2184), 9 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:27,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:27,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 315 [2022-07-12 10:40:27,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:28,263 INFO L129 PetriNetUnfolder]: 778/1843 cut-off events. [2022-07-12 10:40:28,263 INFO L130 PetriNetUnfolder]: For 1532/1946 co-relation queries the response was YES. [2022-07-12 10:40:28,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4133 conditions, 1843 events. 778/1843 cut-off events. For 1532/1946 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10221 event pairs, 159 based on Foata normal form. 439/2097 useless extension candidates. Maximal degree in co-relation 4115. Up to 756 conditions per place. [2022-07-12 10:40:28,277 INFO L132 encePairwiseOnDemand]: 304/315 looper letters, 81 selfloop transitions, 10 changer transitions 0/309 dead transitions. [2022-07-12 10:40:28,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 309 transitions, 1077 flow [2022-07-12 10:40:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:40:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:40:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2435 transitions. [2022-07-12 10:40:28,282 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.773015873015873 [2022-07-12 10:40:28,282 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2435 transitions. [2022-07-12 10:40:28,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2435 transitions. [2022-07-12 10:40:28,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:28,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2435 transitions. [2022-07-12 10:40:28,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.5) internal successors, (2435), 10 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:28,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:28,288 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:28,288 INFO L186 Difference]: Start difference. First operand has 310 places, 300 transitions, 863 flow. Second operand 10 states and 2435 transitions. [2022-07-12 10:40:28,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 309 transitions, 1077 flow [2022-07-12 10:40:28,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 309 transitions, 1060 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:40:28,296 INFO L242 Difference]: Finished difference. Result has 312 places, 299 transitions, 871 flow [2022-07-12 10:40:28,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=871, PETRI_PLACES=312, PETRI_TRANSITIONS=299} [2022-07-12 10:40:28,297 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 28 predicate places. [2022-07-12 10:40:28,297 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 299 transitions, 871 flow [2022-07-12 10:40:28,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 242.66666666666666) internal successors, (2184), 9 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:28,297 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:28,298 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:40:28,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:28,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:28,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:40:28,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:28,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1176720741, now seen corresponding path program 1 times [2022-07-12 10:40:28,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001599463] [2022-07-12 10:40:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 10:40:29,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:29,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001599463] [2022-07-12 10:40:29,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001599463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:29,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617534518] [2022-07-12 10:40:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:29,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:29,985 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) [2022-07-12 10:40:29,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:40:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-12 10:40:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:30,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:30,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2022-07-12 10:40:31,454 INFO L356 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2022-07-12 10:40:31,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 67 [2022-07-12 10:40:47,226 WARN L233 SmtUtils]: Spent 15.02s on a formula simplification. DAG size of input: 106 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 10:40:47,895 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:47,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 247 [2022-07-12 10:40:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 10:40:48,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:49,119 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_410 Int)) (or (forall ((~C~0.offset Int) (~C~0.base Int)) (<= (select (store (select |c_#memory_int| ~C~0.base) (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) ~C~0.offset) v_ArrVal_410) (+ ~C~0.offset 4)) (+ c_~maxa~0 c_~maxb~0))) (< (let ((.cse0 (* |c_thread2Thread1of1ForFork0_~i~1#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (select (select |c_#memory_int| c_~B~0.base) (+ .cse0 c_~B~0.offset)))) v_ArrVal_410))) (<= c_~maxc~0 (+ c_~maxa~0 c_~maxb~0))) is different from false [2022-07-12 10:40:49,429 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:49,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 116 [2022-07-12 10:40:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 1 not checked. [2022-07-12 10:40:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617534518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:50,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:50,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 32, 29] total 90 [2022-07-12 10:40:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150738952] [2022-07-12 10:40:50,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-12 10:40:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-12 10:40:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=7425, Unknown=1, NotChecked=174, Total=8010 [2022-07-12 10:40:50,297 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 315 [2022-07-12 10:40:50,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 299 transitions, 871 flow. Second operand has 90 states, 90 states have (on average 110.07777777777778) internal successors, (9907), 90 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:50,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:50,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 315 [2022-07-12 10:40:50,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:14,158 INFO L129 PetriNetUnfolder]: 36723/57744 cut-off events. [2022-07-12 10:41:14,158 INFO L130 PetriNetUnfolder]: For 43536/43536 co-relation queries the response was YES. [2022-07-12 10:41:14,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143125 conditions, 57744 events. 36723/57744 cut-off events. For 43536/43536 co-relation queries the response was YES. Maximal size of possible extension queue 1844. Compared 455174 event pairs, 2937 based on Foata normal form. 1/53787 useless extension candidates. Maximal degree in co-relation 143105. Up to 8985 conditions per place. [2022-07-12 10:41:14,653 INFO L132 encePairwiseOnDemand]: 226/315 looper letters, 882 selfloop transitions, 352 changer transitions 20/1347 dead transitions. [2022-07-12 10:41:14,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1347 transitions, 6881 flow [2022-07-12 10:41:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-12 10:41:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-07-12 10:41:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 12428 transitions. [2022-07-12 10:41:14,667 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3722072476789458 [2022-07-12 10:41:14,667 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 12428 transitions. [2022-07-12 10:41:14,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 12428 transitions. [2022-07-12 10:41:14,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:14,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 12428 transitions. [2022-07-12 10:41:14,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 117.24528301886792) internal successors, (12428), 106 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:14,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 315.0) internal successors, (33705), 107 states have internal predecessors, (33705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:14,725 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 315.0) internal successors, (33705), 107 states have internal predecessors, (33705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:14,725 INFO L186 Difference]: Start difference. First operand has 312 places, 299 transitions, 871 flow. Second operand 106 states and 12428 transitions. [2022-07-12 10:41:14,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1347 transitions, 6881 flow [2022-07-12 10:41:15,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1347 transitions, 6815 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-12 10:41:15,329 INFO L242 Difference]: Finished difference. Result has 458 places, 614 transitions, 3240 flow [2022-07-12 10:41:15,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=3240, PETRI_PLACES=458, PETRI_TRANSITIONS=614} [2022-07-12 10:41:15,330 INFO L279 CegarLoopForPetriNet]: 284 programPoint places, 174 predicate places. [2022-07-12 10:41:15,330 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 614 transitions, 3240 flow [2022-07-12 10:41:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 110.07777777777778) internal successors, (9907), 90 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:15,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:15,332 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:15,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:15,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:15,550 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-12 10:41:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1295243747, now seen corresponding path program 2 times [2022-07-12 10:41:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:15,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255019715] [2022-07-12 10:41:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:15,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 10:41:17,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255019715] [2022-07-12 10:41:17,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255019715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320208996] [2022-07-12 10:41:17,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:41:17,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:17,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:17,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:17,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:41:17,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-12 10:41:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:18,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:41:18,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-12 10:41:19,297 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:41:19,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-12 10:41:19,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:41:19,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:41:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:21,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:21,256 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 10:41:21,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-12 10:41:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:21,502 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 10:41:21,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-07-12 10:41:22,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:22,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:22,102 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 10:41:22,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-07-12 10:41:22,409 INFO L356 Elim1Store]: treesize reduction 112, result has 51.9 percent of original size [2022-07-12 10:41:22,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 152