./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-15.i --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/pthread-deagle/floating_read-15.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abe6fcc2bea9781e0ab07417eb8616a5b638529e720de8eddec3568cb8edc6ea --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:45:31,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:45:31,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:45:31,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:45:31,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:45:31,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:45:31,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:45:31,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:45:31,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:45:31,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:45:31,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:45:31,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:45:31,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:45:31,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:45:31,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:45:31,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:45:31,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:45:31,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:45:31,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:45:31,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:45:31,975 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:45:31,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:45:31,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:45:31,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:45:31,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:45:31,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:45:31,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:45:31,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:45:31,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:45:31,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:45:31,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:45:31,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:45:31,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:45:31,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:45:31,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:45:31,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:45:31,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:45:31,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:45:31,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:45:31,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:45:31,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:45:31,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:45:31,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:45:32,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:45:32,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:45:32,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:45:32,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:45:32,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:45:32,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:45:32,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:45:32,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:45:32,016 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:45:32,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:45:32,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:45:32,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:45:32,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:45:32,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:45:32,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:45:32,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:45:32,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:45:32,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:45:32,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:45:32,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:45:32,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:45:32,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:45:32,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:45:32,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:45:32,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:45:32,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:45:32,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:45:32,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:45:32,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:45:32,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:45:32,020 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:45:32,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:45:32,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:45:32,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abe6fcc2bea9781e0ab07417eb8616a5b638529e720de8eddec3568cb8edc6ea [2022-07-12 10:45:32,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:45:32,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:45:32,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:45:32,201 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:45:32,202 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:45:32,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-15.i [2022-07-12 10:45:32,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381b6d817/95efe48a6d3f42428bc906607600f56e/FLAGa796949b1 [2022-07-12 10:45:32,642 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:45:32,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-15.i [2022-07-12 10:45:32,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381b6d817/95efe48a6d3f42428bc906607600f56e/FLAGa796949b1 [2022-07-12 10:45:32,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/381b6d817/95efe48a6d3f42428bc906607600f56e [2022-07-12 10:45:32,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:45:32,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:45:32,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:45:32,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:45:32,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:45:32,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:32,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62bc6968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32, skipping insertion in model container [2022-07-12 10:45:32,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:32,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:45:32,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:45:32,926 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-12 10:45:32,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-15.i[31197,31210] [2022-07-12 10:45:32,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:45:32,941 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:45:32,961 WARN L1550 CHandler]: Possible shadowing of function thread [2022-07-12 10:45:32,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-15.i[31197,31210] [2022-07-12 10:45:32,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:45:32,999 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:45:32,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32 WrapperNode [2022-07-12 10:45:32,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:45:33,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:45:33,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:45:33,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:45:33,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,035 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2022-07-12 10:45:33,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:45:33,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:45:33,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:45:33,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:45:33,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:45:33,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:45:33,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:45:33,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:45:33,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (1/1) ... [2022-07-12 10:45:33,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:45:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:33,091 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 10:45:33,097 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 10:45:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:45:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:45:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:45:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:45:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:45:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:45:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:45:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-07-12 10:45:33,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-07-12 10:45:33,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:45:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:45:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:45:33,124 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 10:45:33,218 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:45:33,219 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:45:33,325 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:45:33,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:45:33,330 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:45:33,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:45:33 BoogieIcfgContainer [2022-07-12 10:45:33,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:45:33,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:45:33,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:45:33,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:45:33,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:45:32" (1/3) ... [2022-07-12 10:45:33,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187eb570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:45:33, skipping insertion in model container [2022-07-12 10:45:33,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:45:32" (2/3) ... [2022-07-12 10:45:33,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187eb570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:45:33, skipping insertion in model container [2022-07-12 10:45:33,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:45:33" (3/3) ... [2022-07-12 10:45:33,341 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-15.i [2022-07-12 10:45:33,348 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:45:33,355 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:45:33,355 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:45:33,355 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:45:33,387 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:45:33,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2022-07-12 10:45:33,445 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2022-07-12 10:45:33,445 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:45:33,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2022-07-12 10:45:33,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2022-07-12 10:45:33,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2022-07-12 10:45:33,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:33,470 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:33,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:33,478 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-12 10:45:33,478 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:33,479 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:33,479 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] [2022-07-12 10:45:33,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2022-07-12 10:45:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803484729] [2022-07-12 10:45:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:33,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:33,635 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 10:45:33,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803484729] [2022-07-12 10:45:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803484729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:33,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:33,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:45:33,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837675845] [2022-07-12 10:45:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:33,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:45:33,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:45:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:45:33,668 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2022-07-12 10:45:33,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 10:45:33,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:33,671 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2022-07-12 10:45:33,671 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:33,687 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2022-07-12 10:45:33,688 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:45:33,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 46 events. 0/46 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-07-12 10:45:33,688 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2022-07-12 10:45:33,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2022-07-12 10:45:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:45:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:45:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2022-07-12 10:45:33,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2022-07-12 10:45:33,697 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2022-07-12 10:45:33,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2022-07-12 10:45:33,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:33,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2022-07-12 10:45:33,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 10:45:33,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 10:45:33,703 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 10:45:33,704 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2022-07-12 10:45:33,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2022-07-12 10:45:33,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:33,708 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2022-07-12 10:45:33,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-07-12 10:45:33,711 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2022-07-12 10:45:33,712 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2022-07-12 10:45:33,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 10:45:33,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:33,712 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] [2022-07-12 10:45:33,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:45:33,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:33,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2022-07-12 10:45:33,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:33,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518153459] [2022-07-12 10:45:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:33,760 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 10:45:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:33,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518153459] [2022-07-12 10:45:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518153459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:33,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:33,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:33,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313604059] [2022-07-12 10:45:33,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:33,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:33,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2022-07-12 10:45:33,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 10:45:33,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:33,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2022-07-12 10:45:33,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:33,788 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-12 10:45:33,791 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:33,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:45:33,792 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2022-07-12 10:45:33,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2022-07-12 10:45:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2022-07-12 10:45:33,794 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2022-07-12 10:45:33,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2022-07-12 10:45:33,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2022-07-12 10:45:33,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:33,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2022-07-12 10:45:33,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 10:45:33,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 10:45:33,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 10:45:33,799 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2022-07-12 10:45:33,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2022-07-12 10:45:33,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:33,801 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2022-07-12 10:45:33,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-07-12 10:45:33,803 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-07-12 10:45:33,803 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2022-07-12 10:45:33,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 10:45:33,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:33,804 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] [2022-07-12 10:45:33,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:45:33,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2022-07-12 10:45:33,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:33,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283787924] [2022-07-12 10:45:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:33,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:33,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:33,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283787924] [2022-07-12 10:45:33,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283787924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:33,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:33,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:33,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044564155] [2022-07-12 10:45:33,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:33,877 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2022-07-12 10:45:33,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:45:33,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:33,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2022-07-12 10:45:33,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:33,893 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2022-07-12 10:45:33,894 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:45:33,894 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 43 events. 0/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-12 10:45:33,894 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-07-12 10:45:33,894 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2022-07-12 10:45:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2022-07-12 10:45:33,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2022-07-12 10:45:33,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2022-07-12 10:45:33,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2022-07-12 10:45:33,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:33,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2022-07-12 10:45:33,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 10:45:33,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 10:45:33,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 10:45:33,904 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2022-07-12 10:45:33,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2022-07-12 10:45:33,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:45:33,906 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2022-07-12 10:45:33,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2022-07-12 10:45:33,907 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-07-12 10:45:33,907 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2022-07-12 10:45:33,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 10:45:33,907 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:33,908 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:33,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:45:33,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2022-07-12 10:45:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:33,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332408185] [2022-07-12 10:45:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:33,940 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:45:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:33,967 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:45:33,968 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:45:33,968 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:45:33,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:45:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:45:33,970 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:45:33,972 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:45:33,972 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-12 10:45:33,980 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:45:33,981 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2022-07-12 10:45:33,992 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2022-07-12 10:45:33,992 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:45:33,993 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-07-12 10:45:33,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2022-07-12 10:45:33,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2022-07-12 10:45:33,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:33,996 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:33,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:33,998 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-12 10:45:33,998 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:33,998 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:33,998 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] [2022-07-12 10:45:33,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:33,999 INFO L85 PathProgramCache]: Analyzing trace with hash 775345522, now seen corresponding path program 1 times [2022-07-12 10:45:33,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:33,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786664520] [2022-07-12 10:45:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:33,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,013 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 10:45:34,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786664520] [2022-07-12 10:45:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786664520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:34,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:34,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:45:34,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603347092] [2022-07-12 10:45:34,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:34,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:45:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:34,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:45:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:45:34,021 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 66 [2022-07-12 10:45:34,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 10:45:34,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:34,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 66 [2022-07-12 10:45:34,022 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:34,031 INFO L129 PetriNetUnfolder]: 0/64 cut-off events. [2022-07-12 10:45:34,031 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:45:34,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 0/64 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 3/64 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-07-12 10:45:34,031 INFO L132 encePairwiseOnDemand]: 65/66 looper letters, 2 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2022-07-12 10:45:34,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 106 flow [2022-07-12 10:45:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:45:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:45:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 119 transitions. [2022-07-12 10:45:34,032 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9015151515151515 [2022-07-12 10:45:34,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 119 transitions. [2022-07-12 10:45:34,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 119 transitions. [2022-07-12 10:45:34,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:34,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 119 transitions. [2022-07-12 10:45:34,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 10:45:34,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 10:45:34,034 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states 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 10:45:34,034 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 2 states and 119 transitions. [2022-07-12 10:45:34,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 106 flow [2022-07-12 10:45:34,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 104 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:34,035 INFO L242 Difference]: Finished difference. Result has 51 places, 45 transitions, 100 flow [2022-07-12 10:45:34,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2022-07-12 10:45:34,036 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2022-07-12 10:45:34,036 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 100 flow [2022-07-12 10:45:34,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 58.5) internal successors, (117), 2 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 10:45:34,037 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,037 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:34,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:45:34,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2022-07-12 10:45:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347640839] [2022-07-12 10:45:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,072 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 10:45:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347640839] [2022-07-12 10:45:34,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347640839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:34,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:34,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022426393] [2022-07-12 10:45:34,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:34,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:34,075 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2022-07-12 10:45:34,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 10:45:34,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:34,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2022-07-12 10:45:34,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:34,096 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2022-07-12 10:45:34,100 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:45:34,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 61 events. 0/61 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-07-12 10:45:34,103 INFO L132 encePairwiseOnDemand]: 63/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2022-07-12 10:45:34,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 134 flow [2022-07-12 10:45:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-12 10:45:34,105 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-12 10:45:34,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-12 10:45:34,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-12 10:45:34,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:34,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-12 10:45:34,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 10:45:34,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:45:34,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:45:34,108 INFO L186 Difference]: Start difference. First operand has 51 places, 45 transitions, 100 flow. Second operand 3 states and 167 transitions. [2022-07-12 10:45:34,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 134 flow [2022-07-12 10:45:34,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:34,115 INFO L242 Difference]: Finished difference. Result has 54 places, 46 transitions, 112 flow [2022-07-12 10:45:34,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2022-07-12 10:45:34,115 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2022-07-12 10:45:34,116 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 112 flow [2022-07-12 10:45:34,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 10:45:34,116 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,116 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] [2022-07-12 10:45:34,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:45:34,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2022-07-12 10:45:34,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748037660] [2022-07-12 10:45:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748037660] [2022-07-12 10:45:34,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748037660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:34,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:34,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:34,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295944777] [2022-07-12 10:45:34,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:34,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:34,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2022-07-12 10:45:34,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 10:45:34,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:34,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2022-07-12 10:45:34,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:34,190 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2022-07-12 10:45:34,192 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:45:34,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 87 events. 4/87 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 121. Up to 13 conditions per place. [2022-07-12 10:45:34,194 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-07-12 10:45:34,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 143 flow [2022-07-12 10:45:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-07-12 10:45:34,198 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2022-07-12 10:45:34,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-07-12 10:45:34,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-07-12 10:45:34,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:34,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-07-12 10:45:34,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 10:45:34,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:45:34,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 10:45:34,202 INFO L186 Difference]: Start difference. First operand has 54 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2022-07-12 10:45:34,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 143 flow [2022-07-12 10:45:34,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:34,204 INFO L242 Difference]: Finished difference. Result has 56 places, 48 transitions, 129 flow [2022-07-12 10:45:34,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2022-07-12 10:45:34,204 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2022-07-12 10:45:34,205 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 129 flow [2022-07-12 10:45:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 10:45:34,205 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,205 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] [2022-07-12 10:45:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:45:34,206 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2022-07-12 10:45:34,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618659275] [2022-07-12 10:45:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:34,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618659275] [2022-07-12 10:45:34,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618659275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:34,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017636408] [2022-07-12 10:45:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:34,272 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 10:45:34,273 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 10:45:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:45:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:34,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:34,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017636408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:34,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:34,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:45:34,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520231353] [2022-07-12 10:45:34,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:34,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:45:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:45:34,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:45:34,432 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2022-07-12 10:45:34,432 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 129 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 10:45:34,432 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:34,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2022-07-12 10:45:34,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:34,492 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2022-07-12 10:45:34,493 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-12 10:45:34,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 59 events. 1/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 91. Up to 5 conditions per place. [2022-07-12 10:45:34,493 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-07-12 10:45:34,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 163 flow [2022-07-12 10:45:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:45:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:45:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2022-07-12 10:45:34,496 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2022-07-12 10:45:34,496 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2022-07-12 10:45:34,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2022-07-12 10:45:34,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:34,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2022-07-12 10:45:34,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 10:45:34,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 10:45:34,501 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 10:45:34,501 INFO L186 Difference]: Start difference. First operand has 56 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2022-07-12 10:45:34,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 163 flow [2022-07-12 10:45:34,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:34,503 INFO L242 Difference]: Finished difference. Result has 60 places, 47 transitions, 134 flow [2022-07-12 10:45:34,504 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2022-07-12 10:45:34,505 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2022-07-12 10:45:34,505 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 134 flow [2022-07-12 10:45:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 10:45:34,506 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,506 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:34,531 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 10:45:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:34,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2022-07-12 10:45:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251024334] [2022-07-12 10:45:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:34,741 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:45:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:34,766 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:45:34,767 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:45:34,767 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:45:34,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:45:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:45:34,768 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-12 10:45:34,769 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:45:34,769 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-12 10:45:34,784 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-12 10:45:34,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2022-07-12 10:45:34,809 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2022-07-12 10:45:34,809 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-12 10:45:34,810 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 507 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2022-07-12 10:45:34,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2022-07-12 10:45:34,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2022-07-12 10:45:34,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:34,814 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:34,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:34,815 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-12 10:45:34,816 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:34,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,816 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] [2022-07-12 10:45:34,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2022-07-12 10:45:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881467395] [2022-07-12 10:45:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,854 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 10:45:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881467395] [2022-07-12 10:45:34,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881467395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:34,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:34,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:34,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271630211] [2022-07-12 10:45:34,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:34,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:34,856 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-12 10:45:34,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 10:45:34,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:34,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-12 10:45:34,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:34,875 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2022-07-12 10:45:34,875 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:45:34,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 79 events. 0/79 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-07-12 10:45:34,876 INFO L132 encePairwiseOnDemand]: 69/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-07-12 10:45:34,876 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 159 flow [2022-07-12 10:45:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2022-07-12 10:45:34,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8447488584474886 [2022-07-12 10:45:34,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2022-07-12 10:45:34,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2022-07-12 10:45:34,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:34,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2022-07-12 10:45:34,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states 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 10:45:34,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 10:45:34,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 10:45:34,879 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 3 states and 185 transitions. [2022-07-12 10:45:34,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 159 flow [2022-07-12 10:45:34,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 153 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:34,881 INFO L242 Difference]: Finished difference. Result has 61 places, 52 transitions, 129 flow [2022-07-12 10:45:34,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2022-07-12 10:45:34,884 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-07-12 10:45:34,885 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 129 flow [2022-07-12 10:45:34,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 10:45:34,886 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,886 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] [2022-07-12 10:45:34,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:45:34,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2022-07-12 10:45:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964648472] [2022-07-12 10:45:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964648472] [2022-07-12 10:45:34,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964648472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:34,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:34,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:34,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640308426] [2022-07-12 10:45:34,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:34,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:34,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:34,916 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2022-07-12 10:45:34,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 10:45:34,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:34,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2022-07-12 10:45:34,916 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:34,934 INFO L129 PetriNetUnfolder]: 21/145 cut-off events. [2022-07-12 10:45:34,935 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-12 10:45:34,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 145 events. 21/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 403 event pairs, 7 based on Foata normal form. 3/140 useless extension candidates. Maximal degree in co-relation 185. Up to 44 conditions per place. [2022-07-12 10:45:34,936 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2022-07-12 10:45:34,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 177 flow [2022-07-12 10:45:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2022-07-12 10:45:34,937 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2022-07-12 10:45:34,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2022-07-12 10:45:34,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2022-07-12 10:45:34,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:34,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2022-07-12 10:45:34,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 10:45:34,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 10:45:34,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 10:45:34,939 INFO L186 Difference]: Start difference. First operand has 61 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2022-07-12 10:45:34,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 177 flow [2022-07-12 10:45:34,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:34,941 INFO L242 Difference]: Finished difference. Result has 63 places, 55 transitions, 153 flow [2022-07-12 10:45:34,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2022-07-12 10:45:34,943 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2022-07-12 10:45:34,943 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 153 flow [2022-07-12 10:45:34,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states 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 10:45:34,943 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:34,943 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] [2022-07-12 10:45:34,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:45:34,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2022-07-12 10:45:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:34,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806973400] [2022-07-12 10:45:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806973400] [2022-07-12 10:45:34,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806973400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944336774] [2022-07-12 10:45:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:34,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:34,988 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 10:45:34,989 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 10:45:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:45:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:35,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:35,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944336774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:35,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:35,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:45:35,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328754136] [2022-07-12 10:45:35,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:35,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:45:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:45:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:45:35,096 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2022-07-12 10:45:35,097 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 10:45:35,097 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:35,097 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2022-07-12 10:45:35,097 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:35,160 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2022-07-12 10:45:35,160 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:45:35,161 INFO L84 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 115 events. 14/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 234 event pairs, 6 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 130. Up to 29 conditions per place. [2022-07-12 10:45:35,161 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2022-07-12 10:45:35,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 219 flow [2022-07-12 10:45:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:45:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:45:35,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2022-07-12 10:45:35,162 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2022-07-12 10:45:35,162 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2022-07-12 10:45:35,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2022-07-12 10:45:35,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:35,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2022-07-12 10:45:35,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 10:45:35,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 10:45:35,165 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 10:45:35,165 INFO L186 Difference]: Start difference. First operand has 63 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2022-07-12 10:45:35,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 219 flow [2022-07-12 10:45:35,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:35,166 INFO L242 Difference]: Finished difference. Result has 73 places, 61 transitions, 199 flow [2022-07-12 10:45:35,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2022-07-12 10:45:35,167 INFO L279 CegarLoopForPetriNet]: 58 programPoint places, 15 predicate places. [2022-07-12 10:45:35,167 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 199 flow [2022-07-12 10:45:35,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 10:45:35,167 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:35,167 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:35,185 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 10:45:35,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 10:45:35,386 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:35,386 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2022-07-12 10:45:35,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:35,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264072975] [2022-07-12 10:45:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:35,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:35,406 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:45:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:35,420 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:45:35,420 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:45:35,420 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:45:35,420 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:45:35,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:45:35,420 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-12 10:45:35,421 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:45:35,421 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-12 10:45:35,437 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:45:35,441 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2022-07-12 10:45:35,466 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2022-07-12 10:45:35,466 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-12 10:45:35,467 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1158 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2022-07-12 10:45:35,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2022-07-12 10:45:35,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2022-07-12 10:45:35,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:35,470 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:35,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:35,472 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-12 10:45:35,472 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:35,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:35,472 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] [2022-07-12 10:45:35,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2022-07-12 10:45:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604834151] [2022-07-12 10:45:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:35,487 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 10:45:35,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604834151] [2022-07-12 10:45:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604834151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:35,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:35,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:35,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511837946] [2022-07-12 10:45:35,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:35,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:35,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:35,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:35,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:35,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2022-07-12 10:45:35,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 10:45:35,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:35,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2022-07-12 10:45:35,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:35,509 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2022-07-12 10:45:35,509 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-12 10:45:35,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-12 10:45:35,510 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-07-12 10:45:35,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2022-07-12 10:45:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2022-07-12 10:45:35,511 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8375 [2022-07-12 10:45:35,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2022-07-12 10:45:35,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2022-07-12 10:45:35,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:35,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2022-07-12 10:45:35,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 10:45:35,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:35,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:35,512 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2022-07-12 10:45:35,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2022-07-12 10:45:35,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:35,515 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2022-07-12 10:45:35,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-07-12 10:45:35,516 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2022-07-12 10:45:35,516 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2022-07-12 10:45:35,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 10:45:35,517 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:35,517 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] [2022-07-12 10:45:35,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:45:35,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2022-07-12 10:45:35,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:35,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434352534] [2022-07-12 10:45:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:35,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:35,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:35,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434352534] [2022-07-12 10:45:35,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434352534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:35,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:35,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:35,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525423579] [2022-07-12 10:45:35,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:35,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:35,543 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-12 10:45:35,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 10:45:35,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:35,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-12 10:45:35,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:35,589 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2022-07-12 10:45:35,590 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-07-12 10:45:35,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 359 events. 73/359 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1605 event pairs, 35 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 523. Up to 126 conditions per place. [2022-07-12 10:45:35,592 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-07-12 10:45:35,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2022-07-12 10:45:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2022-07-12 10:45:35,593 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2022-07-12 10:45:35,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2022-07-12 10:45:35,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2022-07-12 10:45:35,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:35,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2022-07-12 10:45:35,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 10:45:35,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:35,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:35,595 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2022-07-12 10:45:35,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2022-07-12 10:45:35,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:35,598 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2022-07-12 10:45:35,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2022-07-12 10:45:35,599 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2022-07-12 10:45:35,599 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2022-07-12 10:45:35,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 10:45:35,600 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:35,600 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] [2022-07-12 10:45:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:45:35,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2022-07-12 10:45:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:35,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79675755] [2022-07-12 10:45:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:35,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:35,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79675755] [2022-07-12 10:45:35,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79675755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:35,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972505031] [2022-07-12 10:45:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:35,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:35,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:35,632 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 10:45:35,633 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 10:45:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:45:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:35,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:35,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972505031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:35,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:35,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:45:35,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608539434] [2022-07-12 10:45:35,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:35,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:45:35,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:35,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:45:35,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:45:35,745 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2022-07-12 10:45:35,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 10:45:35,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:35,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2022-07-12 10:45:35,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:35,807 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2022-07-12 10:45:35,807 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:45:35,808 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 233 events. 54/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 824 event pairs, 28 based on Foata normal form. 2/215 useless extension candidates. Maximal degree in co-relation 324. Up to 92 conditions per place. [2022-07-12 10:45:35,809 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2022-07-12 10:45:35,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2022-07-12 10:45:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:45:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:45:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2022-07-12 10:45:35,811 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2022-07-12 10:45:35,811 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2022-07-12 10:45:35,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2022-07-12 10:45:35,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:35,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2022-07-12 10:45:35,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 10:45:35,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 10:45:35,813 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 10:45:35,813 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2022-07-12 10:45:35,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2022-07-12 10:45:35,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:35,815 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2022-07-12 10:45:35,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2022-07-12 10:45:35,816 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2022-07-12 10:45:35,816 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2022-07-12 10:45:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 10:45:35,817 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:35,817 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:35,835 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 10:45:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:36,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2022-07-12 10:45:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095730013] [2022-07-12 10:45:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095730013] [2022-07-12 10:45:36,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095730013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:36,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694276859] [2022-07-12 10:45:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:36,082 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 10:45:36,083 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 10:45:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:45:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:36,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:36,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694276859] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:36,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:36,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-12 10:45:36,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571970020] [2022-07-12 10:45:36,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:36,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:45:36,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:45:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:45:36,259 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2022-07-12 10:45:36,260 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 222 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 10:45:36,260 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:36,260 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2022-07-12 10:45:36,260 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:36,617 INFO L129 PetriNetUnfolder]: 768/1923 cut-off events. [2022-07-12 10:45:36,618 INFO L130 PetriNetUnfolder]: For 1173/1181 co-relation queries the response was YES. [2022-07-12 10:45:36,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4592 conditions, 1923 events. 768/1923 cut-off events. For 1173/1181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12729 event pairs, 55 based on Foata normal form. 13/1936 useless extension candidates. Maximal degree in co-relation 1670. Up to 663 conditions per place. [2022-07-12 10:45:36,630 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2022-07-12 10:45:36,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2022-07-12 10:45:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:45:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:45:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2022-07-12 10:45:36,633 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2022-07-12 10:45:36,634 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2022-07-12 10:45:36,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2022-07-12 10:45:36,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:36,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2022-07-12 10:45:36,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states 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 10:45:36,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 10:45:36,639 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states 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 10:45:36,639 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2022-07-12 10:45:36,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2022-07-12 10:45:36,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:36,643 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2022-07-12 10:45:36,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=607, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2022-07-12 10:45:36,644 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2022-07-12 10:45:36,644 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2022-07-12 10:45:36,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 10:45:36,645 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:36,645 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:36,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:36,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:45:36,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1611844105, now seen corresponding path program 1 times [2022-07-12 10:45:36,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505814882] [2022-07-12 10:45:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:36,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:36,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505814882] [2022-07-12 10:45:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505814882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055866893] [2022-07-12 10:45:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:36,924 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 10:45:36,925 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 10:45:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:45:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055866893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:37,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 10:45:37,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618395740] [2022-07-12 10:45:37,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:37,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:45:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:45:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:45:37,139 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-12 10:45:37,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 607 flow. Second operand has 20 states, 20 states have (on average 53.2) internal successors, (1064), 20 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 10:45:37,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:37,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-12 10:45:37,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:37,993 INFO L129 PetriNetUnfolder]: 1764/4221 cut-off events. [2022-07-12 10:45:37,993 INFO L130 PetriNetUnfolder]: For 4672/4682 co-relation queries the response was YES. [2022-07-12 10:45:38,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12332 conditions, 4221 events. 1764/4221 cut-off events. For 4672/4682 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33221 event pairs, 62 based on Foata normal form. 28/4249 useless extension candidates. Maximal degree in co-relation 4743. Up to 1292 conditions per place. [2022-07-12 10:45:38,030 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2022-07-12 10:45:38,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2022-07-12 10:45:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 10:45:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-12 10:45:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2022-07-12 10:45:38,035 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2022-07-12 10:45:38,036 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2022-07-12 10:45:38,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2022-07-12 10:45:38,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:38,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2022-07-12 10:45:38,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states 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 10:45:38,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 10:45:38,045 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 10:45:38,045 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2022-07-12 10:45:38,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2022-07-12 10:45:38,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-12 10:45:38,062 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2022-07-12 10:45:38,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1863, PETRI_PLACES=140, PETRI_TRANSITIONS=255} [2022-07-12 10:45:38,063 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2022-07-12 10:45:38,063 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2022-07-12 10:45:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.2) internal successors, (1064), 20 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 10:45:38,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:38,064 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:38,085 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 10:45:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:45:38,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2022-07-12 10:45:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634237441] [2022-07-12 10:45:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:38,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:38,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634237441] [2022-07-12 10:45:38,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634237441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:38,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206653512] [2022-07-12 10:45:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:38,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:38,322 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 10:45:38,323 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 10:45:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 10:45:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:38,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206653512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:38,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:38,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-07-12 10:45:38,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17238388] [2022-07-12 10:45:38,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:38,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:45:38,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:45:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:45:38,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2022-07-12 10:45:38,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:38,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:38,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2022-07-12 10:45:38,589 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:39,807 INFO L129 PetriNetUnfolder]: 2712/6242 cut-off events. [2022-07-12 10:45:39,807 INFO L130 PetriNetUnfolder]: For 14537/14639 co-relation queries the response was YES. [2022-07-12 10:45:39,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20126 conditions, 6242 events. 2712/6242 cut-off events. For 14537/14639 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 51021 event pairs, 0 based on Foata normal form. 295/6536 useless extension candidates. Maximal degree in co-relation 9511. Up to 1549 conditions per place. [2022-07-12 10:45:39,901 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2022-07-12 10:45:39,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2022-07-12 10:45:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 10:45:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-12 10:45:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2022-07-12 10:45:39,906 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2022-07-12 10:45:39,906 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2022-07-12 10:45:39,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2022-07-12 10:45:39,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:39,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2022-07-12 10:45:39,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states 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 10:45:39,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 10:45:39,916 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states 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 10:45:39,916 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2022-07-12 10:45:39,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2022-07-12 10:45:39,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2022-07-12 10:45:39,972 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2022-07-12 10:45:39,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=737} [2022-07-12 10:45:39,973 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2022-07-12 10:45:39,973 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2022-07-12 10:45:39,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:39,973 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:39,973 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:39,992 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 10:45:40,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:40,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2022-07-12 10:45:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:40,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344529929] [2022-07-12 10:45:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:40,202 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:45:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:40,222 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:45:40,222 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:45:40,222 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:45:40,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:45:40,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:45:40,223 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:40,223 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:45:40,223 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-12 10:45:40,235 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-12 10:45:40,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2022-07-12 10:45:40,320 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2022-07-12 10:45:40,335 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-12 10:45:40,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2760 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2022-07-12 10:45:40,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2022-07-12 10:45:40,342 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2022-07-12 10:45:40,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:40,343 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:40,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:40,344 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-12 10:45:40,344 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:40,344 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:40,345 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] [2022-07-12 10:45:40,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2022-07-12 10:45:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929757027] [2022-07-12 10:45:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:40,361 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 10:45:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:40,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929757027] [2022-07-12 10:45:40,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929757027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:40,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:40,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:45:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208040532] [2022-07-12 10:45:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:40,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:45:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:45:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:45:40,364 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2022-07-12 10:45:40,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 10:45:40,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:40,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2022-07-12 10:45:40,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:40,384 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2022-07-12 10:45:40,385 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-07-12 10:45:40,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 118 events. 0/118 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-12 10:45:40,385 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2022-07-12 10:45:40,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2022-07-12 10:45:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:45:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:45:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-07-12 10:45:40,404 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2022-07-12 10:45:40,404 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-07-12 10:45:40,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-07-12 10:45:40,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:40,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-07-12 10:45:40,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 10:45:40,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 10:45:40,405 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 10:45:40,405 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2022-07-12 10:45:40,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2022-07-12 10:45:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:40,407 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2022-07-12 10:45:40,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2022-07-12 10:45:40,407 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-07-12 10:45:40,407 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2022-07-12 10:45:40,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 10:45:40,408 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:40,408 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] [2022-07-12 10:45:40,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:45:40,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2022-07-12 10:45:40,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879274727] [2022-07-12 10:45:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:40,431 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 10:45:40,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879274727] [2022-07-12 10:45:40,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879274727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:40,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231876469] [2022-07-12 10:45:40,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:40,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:40,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:40,433 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2022-07-12 10:45:40,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 10:45:40,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:40,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2022-07-12 10:45:40,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:40,450 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-12 10:45:40,450 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:45:40,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 115 events. 0/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-12 10:45:40,451 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-07-12 10:45:40,451 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2022-07-12 10:45:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-12 10:45:40,452 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-12 10:45:40,452 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-12 10:45:40,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-12 10:45:40,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:40,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-12 10:45:40,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 10:45:40,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 10:45:40,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 10:45:40,454 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2022-07-12 10:45:40,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2022-07-12 10:45:40,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:40,455 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2022-07-12 10:45:40,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2022-07-12 10:45:40,455 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-07-12 10:45:40,456 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2022-07-12 10:45:40,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 10:45:40,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:40,456 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] [2022-07-12 10:45:40,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-12 10:45:40,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:40,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2022-07-12 10:45:40,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:40,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954291418] [2022-07-12 10:45:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:40,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:40,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954291418] [2022-07-12 10:45:40,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954291418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:40,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:40,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317121654] [2022-07-12 10:45:40,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:40,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2022-07-12 10:45:40,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 10:45:40,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:40,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2022-07-12 10:45:40,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:40,527 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2022-07-12 10:45:40,528 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2022-07-12 10:45:40,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 733 events. 212/733 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4075 event pairs, 118 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 1195. Up to 327 conditions per place. [2022-07-12 10:45:40,532 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2022-07-12 10:45:40,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2022-07-12 10:45:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2022-07-12 10:45:40,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2022-07-12 10:45:40,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2022-07-12 10:45:40,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2022-07-12 10:45:40,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:40,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2022-07-12 10:45:40,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states 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 10:45:40,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 10:45:40,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 10:45:40,535 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2022-07-12 10:45:40,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2022-07-12 10:45:40,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:40,536 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2022-07-12 10:45:40,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2022-07-12 10:45:40,537 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-07-12 10:45:40,537 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2022-07-12 10:45:40,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 10:45:40,537 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:40,538 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] [2022-07-12 10:45:40,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 10:45:40,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2022-07-12 10:45:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:40,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293957375] [2022-07-12 10:45:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:40,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293957375] [2022-07-12 10:45:40,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293957375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328091127] [2022-07-12 10:45:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:40,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:40,561 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 10:45:40,563 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 10:45:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:40,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:45:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:40,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:40,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328091127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:40,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:40,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:45:40,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986435354] [2022-07-12 10:45:40,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:40,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:45:40,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:45:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:45:40,653 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-12 10:45:40,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 10:45:40,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:40,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-12 10:45:40,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:40,717 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2022-07-12 10:45:40,718 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:45:40,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 489 events. 161/489 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2395 event pairs, 94 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 801. Up to 246 conditions per place. [2022-07-12 10:45:40,721 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2022-07-12 10:45:40,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2022-07-12 10:45:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:45:40,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:45:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2022-07-12 10:45:40,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2022-07-12 10:45:40,740 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2022-07-12 10:45:40,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2022-07-12 10:45:40,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:40,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2022-07-12 10:45:40,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 10:45:40,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 10:45:40,742 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 10:45:40,742 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2022-07-12 10:45:40,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2022-07-12 10:45:40,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:40,743 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2022-07-12 10:45:40,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2022-07-12 10:45:40,744 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2022-07-12 10:45:40,744 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2022-07-12 10:45:40,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 10:45:40,747 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:40,748 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:40,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:40,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:40,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2022-07-12 10:45:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:40,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400895764] [2022-07-12 10:45:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:40,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:41,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:41,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400895764] [2022-07-12 10:45:41,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400895764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:41,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054129095] [2022-07-12 10:45:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:41,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:41,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:41,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:45:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:45:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:41,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:41,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054129095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:41,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:41,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-07-12 10:45:41,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620253272] [2022-07-12 10:45:41,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:45:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:45:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:45:41,279 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2022-07-12 10:45:41,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 10:45:41,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:41,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2022-07-12 10:45:41,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:42,915 INFO L129 PetriNetUnfolder]: 1890/3692 cut-off events. [2022-07-12 10:45:42,915 INFO L130 PetriNetUnfolder]: For 2300/2300 co-relation queries the response was YES. [2022-07-12 10:45:42,925 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9428 conditions, 3692 events. 1890/3692 cut-off events. For 2300/2300 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 23537 event pairs, 0 based on Foata normal form. 137/3829 useless extension candidates. Maximal degree in co-relation 9415. Up to 1597 conditions per place. [2022-07-12 10:45:42,940 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 188 selfloop transitions, 291 changer transitions 0/518 dead transitions. [2022-07-12 10:45:42,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 518 transitions, 2986 flow [2022-07-12 10:45:42,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-12 10:45:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-12 10:45:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5377 transitions. [2022-07-12 10:45:42,957 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6791714033093343 [2022-07-12 10:45:42,957 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5377 transitions. [2022-07-12 10:45:42,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5377 transitions. [2022-07-12 10:45:42,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:42,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5377 transitions. [2022-07-12 10:45:42,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 59.08791208791209) internal successors, (5377), 91 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states 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 10:45:42,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states 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 10:45:42,989 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states 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 10:45:42,989 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 91 states and 5377 transitions. [2022-07-12 10:45:42,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 518 transitions, 2986 flow [2022-07-12 10:45:42,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 518 transitions, 2879 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-07-12 10:45:42,998 INFO L242 Difference]: Finished difference. Result has 186 places, 344 transitions, 1980 flow [2022-07-12 10:45:42,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1980, PETRI_PLACES=186, PETRI_TRANSITIONS=344} [2022-07-12 10:45:42,998 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 112 predicate places. [2022-07-12 10:45:42,999 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 344 transitions, 1980 flow [2022-07-12 10:45:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 10:45:42,999 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:43,000 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:43,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 10:45:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 10:45:43,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2022-07-12 10:45:43,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715708220] [2022-07-12 10:45:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:43,235 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:45:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:43,254 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:45:43,254 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:45:43,254 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:45:43,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:45:43,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 10:45:43,255 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-12 10:45:43,255 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:45:43,255 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-12 10:45:43,270 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-12 10:45:43,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 94 transitions, 266 flow [2022-07-12 10:45:43,332 INFO L129 PetriNetUnfolder]: 213/1255 cut-off events. [2022-07-12 10:45:43,332 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-12 10:45:43,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1255 events. 213/1255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6831 event pairs, 72 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 771. Up to 192 conditions per place. [2022-07-12 10:45:43,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 94 transitions, 266 flow [2022-07-12 10:45:43,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 70 transitions, 200 flow [2022-07-12 10:45:43,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:43,339 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:43,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:43,340 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2022-07-12 10:45:43,340 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:43,340 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:43,340 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] [2022-07-12 10:45:43,340 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash -543324351, now seen corresponding path program 1 times [2022-07-12 10:45:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751297338] [2022-07-12 10:45:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:43,354 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 10:45:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751297338] [2022-07-12 10:45:43,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751297338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:43,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:43,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41133243] [2022-07-12 10:45:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:43,356 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 94 [2022-07-12 10:45:43,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 10:45:43,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:43,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 94 [2022-07-12 10:45:43,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:43,373 INFO L129 PetriNetUnfolder]: 0/133 cut-off events. [2022-07-12 10:45:43,373 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-07-12 10:45:43,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 133 events. 0/133 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-07-12 10:45:43,373 INFO L132 encePairwiseOnDemand]: 90/94 looper letters, 15 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-07-12 10:45:43,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 240 flow [2022-07-12 10:45:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2022-07-12 10:45:43,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8262411347517731 [2022-07-12 10:45:43,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2022-07-12 10:45:43,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2022-07-12 10:45:43,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:43,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2022-07-12 10:45:43,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 10:45:43,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 10:45:43,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 10:45:43,376 INFO L186 Difference]: Start difference. First operand has 82 places, 70 transitions, 200 flow. Second operand 3 states and 233 transitions. [2022-07-12 10:45:43,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 240 flow [2022-07-12 10:45:43,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 210 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:43,377 INFO L242 Difference]: Finished difference. Result has 85 places, 70 transitions, 180 flow [2022-07-12 10:45:43,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2022-07-12 10:45:43,377 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2022-07-12 10:45:43,377 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 180 flow [2022-07-12 10:45:43,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 10:45:43,377 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:43,377 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] [2022-07-12 10:45:43,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 10:45:43,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1763634818, now seen corresponding path program 1 times [2022-07-12 10:45:43,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:43,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216542488] [2022-07-12 10:45:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:43,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:43,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216542488] [2022-07-12 10:45:43,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216542488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:43,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:43,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969924848] [2022-07-12 10:45:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:43,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:43,404 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2022-07-12 10:45:43,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 10:45:43,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:43,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2022-07-12 10:45:43,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:43,512 INFO L129 PetriNetUnfolder]: 558/1515 cut-off events. [2022-07-12 10:45:43,512 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-07-12 10:45:43,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1515 events. 558/1515 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9653 event pairs, 345 based on Foata normal form. 6/1451 useless extension candidates. Maximal degree in co-relation 2522. Up to 799 conditions per place. [2022-07-12 10:45:43,520 INFO L132 encePairwiseOnDemand]: 86/94 looper letters, 19 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2022-07-12 10:45:43,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 279 flow [2022-07-12 10:45:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2022-07-12 10:45:43,521 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8191489361702128 [2022-07-12 10:45:43,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2022-07-12 10:45:43,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2022-07-12 10:45:43,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:43,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2022-07-12 10:45:43,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:43,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 10:45:43,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 10:45:43,523 INFO L186 Difference]: Start difference. First operand has 85 places, 70 transitions, 180 flow. Second operand 3 states and 231 transitions. [2022-07-12 10:45:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 279 flow [2022-07-12 10:45:43,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:43,524 INFO L242 Difference]: Finished difference. Result has 87 places, 76 transitions, 225 flow [2022-07-12 10:45:43,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2022-07-12 10:45:43,525 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2022-07-12 10:45:43,525 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 225 flow [2022-07-12 10:45:43,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 10:45:43,525 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:43,525 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] [2022-07-12 10:45:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-12 10:45:43,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:43,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:43,526 INFO L85 PathProgramCache]: Analyzing trace with hash -35190009, now seen corresponding path program 1 times [2022-07-12 10:45:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:43,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307169043] [2022-07-12 10:45:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:43,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:43,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307169043] [2022-07-12 10:45:43,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307169043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:43,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339091129] [2022-07-12 10:45:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:43,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:43,547 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:43,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:45:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:45:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:43,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:43,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339091129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:43,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:43,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 10:45:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207950105] [2022-07-12 10:45:43,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:43,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 10:45:43,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 10:45:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 10:45:43,643 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 94 [2022-07-12 10:45:43,644 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 10:45:43,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:43,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 94 [2022-07-12 10:45:43,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:43,758 INFO L129 PetriNetUnfolder]: 427/1047 cut-off events. [2022-07-12 10:45:43,759 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-12 10:45:43,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 1047 events. 427/1047 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6187 event pairs, 272 based on Foata normal form. 2/947 useless extension candidates. Maximal degree in co-relation 1679. Up to 607 conditions per place. [2022-07-12 10:45:43,767 INFO L132 encePairwiseOnDemand]: 88/94 looper letters, 16 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2022-07-12 10:45:43,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 297 flow [2022-07-12 10:45:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 10:45:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-12 10:45:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 657 transitions. [2022-07-12 10:45:43,768 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.776595744680851 [2022-07-12 10:45:43,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 657 transitions. [2022-07-12 10:45:43,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 657 transitions. [2022-07-12 10:45:43,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:43,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 657 transitions. [2022-07-12 10:45:43,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 10:45:43,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 10:45:43,771 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 10:45:43,771 INFO L186 Difference]: Start difference. First operand has 87 places, 76 transitions, 225 flow. Second operand 9 states and 657 transitions. [2022-07-12 10:45:43,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 297 flow [2022-07-12 10:45:43,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:43,773 INFO L242 Difference]: Finished difference. Result has 97 places, 82 transitions, 268 flow [2022-07-12 10:45:43,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=268, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2022-07-12 10:45:43,773 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 15 predicate places. [2022-07-12 10:45:43,773 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 268 flow [2022-07-12 10:45:43,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 10:45:43,774 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:43,774 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:43,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:43,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 10:45:43,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1143993960, now seen corresponding path program 1 times [2022-07-12 10:45:43,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:43,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035630489] [2022-07-12 10:45:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:44,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035630489] [2022-07-12 10:45:44,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035630489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010091670] [2022-07-12 10:45:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:44,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:44,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:44,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:44,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:45:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:45:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:44,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 10:45:44,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010091670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:44,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:44,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-12 10:45:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725304871] [2022-07-12 10:45:44,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:45:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:44,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:45:44,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:45:44,202 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 94 [2022-07-12 10:45:44,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 268 flow. Second operand has 15 states, 15 states have (on average 61.6) internal successors, (924), 15 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 10:45:44,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:44,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 94 [2022-07-12 10:45:44,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:45,179 INFO L129 PetriNetUnfolder]: 5425/10769 cut-off events. [2022-07-12 10:45:45,180 INFO L130 PetriNetUnfolder]: For 6142/6202 co-relation queries the response was YES. [2022-07-12 10:45:45,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26797 conditions, 10769 events. 5425/10769 cut-off events. For 6142/6202 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 82838 event pairs, 738 based on Foata normal form. 61/10830 useless extension candidates. Maximal degree in co-relation 11329. Up to 5002 conditions per place. [2022-07-12 10:45:45,256 INFO L132 encePairwiseOnDemand]: 80/94 looper letters, 94 selfloop transitions, 82 changer transitions 0/223 dead transitions. [2022-07-12 10:45:45,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 223 transitions, 1291 flow [2022-07-12 10:45:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 10:45:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-12 10:45:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1270 transitions. [2022-07-12 10:45:45,258 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7110862262038073 [2022-07-12 10:45:45,258 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1270 transitions. [2022-07-12 10:45:45,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1270 transitions. [2022-07-12 10:45:45,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:45,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1270 transitions. [2022-07-12 10:45:45,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.84210526315789) internal successors, (1270), 19 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states 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 10:45:45,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 94.0) internal successors, (1880), 20 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 10:45:45,262 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 94.0) internal successors, (1880), 20 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states 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 10:45:45,262 INFO L186 Difference]: Start difference. First operand has 97 places, 82 transitions, 268 flow. Second operand 19 states and 1270 transitions. [2022-07-12 10:45:45,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 223 transitions, 1291 flow [2022-07-12 10:45:45,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 223 transitions, 1263 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:45,268 INFO L242 Difference]: Finished difference. Result has 116 places, 149 transitions, 757 flow [2022-07-12 10:45:45,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=757, PETRI_PLACES=116, PETRI_TRANSITIONS=149} [2022-07-12 10:45:45,268 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 34 predicate places. [2022-07-12 10:45:45,268 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 149 transitions, 757 flow [2022-07-12 10:45:45,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.6) internal successors, (924), 15 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 10:45:45,268 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:45,269 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:45,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:45,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 95950356, now seen corresponding path program 1 times [2022-07-12 10:45:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:45,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463356846] [2022-07-12 10:45:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:45:45,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463356846] [2022-07-12 10:45:45,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463356846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:45,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480533427] [2022-07-12 10:45:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:45,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:45,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:45,530 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:45,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:45:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:45:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:45:45,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 10:45:45,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480533427] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:45,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:45,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 10:45:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524297868] [2022-07-12 10:45:45,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:45:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:45:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:45:45,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 94 [2022-07-12 10:45:45,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 149 transitions, 757 flow. Second operand has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states 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 10:45:45,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:45,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 94 [2022-07-12 10:45:45,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:48,388 INFO L129 PetriNetUnfolder]: 13401/27115 cut-off events. [2022-07-12 10:45:48,388 INFO L130 PetriNetUnfolder]: For 30676/30700 co-relation queries the response was YES. [2022-07-12 10:45:48,507 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87378 conditions, 27115 events. 13401/27115 cut-off events. For 30676/30700 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 250293 event pairs, 1145 based on Foata normal form. 128/27243 useless extension candidates. Maximal degree in co-relation 34941. Up to 11453 conditions per place. [2022-07-12 10:45:48,634 INFO L132 encePairwiseOnDemand]: 78/94 looper letters, 149 selfloop transitions, 220 changer transitions 0/421 dead transitions. [2022-07-12 10:45:48,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 421 transitions, 3211 flow [2022-07-12 10:45:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 10:45:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-12 10:45:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2588 transitions. [2022-07-12 10:45:48,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6715101193565127 [2022-07-12 10:45:48,637 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2588 transitions. [2022-07-12 10:45:48,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2588 transitions. [2022-07-12 10:45:48,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:48,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2588 transitions. [2022-07-12 10:45:48,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 63.1219512195122) internal successors, (2588), 41 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states 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 10:45:48,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 10:45:48,643 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 94.0) internal successors, (3948), 42 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states 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 10:45:48,644 INFO L186 Difference]: Start difference. First operand has 116 places, 149 transitions, 757 flow. Second operand 41 states and 2588 transitions. [2022-07-12 10:45:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 421 transitions, 3211 flow [2022-07-12 10:45:48,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 421 transitions, 3189 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-07-12 10:45:48,703 INFO L242 Difference]: Finished difference. Result has 156 places, 311 transitions, 2301 flow [2022-07-12 10:45:48,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2301, PETRI_PLACES=156, PETRI_TRANSITIONS=311} [2022-07-12 10:45:48,704 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 74 predicate places. [2022-07-12 10:45:48,704 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 311 transitions, 2301 flow [2022-07-12 10:45:48,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states 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 10:45:48,705 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:48,705 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:48,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 10:45:48,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-12 10:45:48,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1512434496, now seen corresponding path program 1 times [2022-07-12 10:45:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:48,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698802706] [2022-07-12 10:45:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:48,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:48,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698802706] [2022-07-12 10:45:48,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698802706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:48,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104728994] [2022-07-12 10:45:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:48,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:48,988 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:48,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:45:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 10:45:49,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:49,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:49,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104728994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:49,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:49,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-07-12 10:45:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914628426] [2022-07-12 10:45:49,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:49,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:45:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:45:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:45:49,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 94 [2022-07-12 10:45:49,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 311 transitions, 2301 flow. Second operand has 24 states, 24 states have (on average 60.75) internal successors, (1458), 24 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 10:45:49,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:49,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 94 [2022-07-12 10:45:49,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:55,279 INFO L129 PetriNetUnfolder]: 25947/47397 cut-off events. [2022-07-12 10:45:55,280 INFO L130 PetriNetUnfolder]: For 200844/200952 co-relation queries the response was YES. [2022-07-12 10:45:55,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193734 conditions, 47397 events. 25947/47397 cut-off events. For 200844/200952 co-relation queries the response was YES. Maximal size of possible extension queue 1876. Compared 431649 event pairs, 688 based on Foata normal form. 828/48224 useless extension candidates. Maximal degree in co-relation 90843. Up to 19871 conditions per place. [2022-07-12 10:45:55,940 INFO L132 encePairwiseOnDemand]: 77/94 looper letters, 719 selfloop transitions, 1347 changer transitions 0/2136 dead transitions. [2022-07-12 10:45:55,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 2136 transitions, 22837 flow [2022-07-12 10:45:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 10:45:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-12 10:45:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5312 transitions. [2022-07-12 10:45:55,945 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2022-07-12 10:45:55,945 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5312 transitions. [2022-07-12 10:45:55,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5312 transitions. [2022-07-12 10:45:55,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:55,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5312 transitions. [2022-07-12 10:45:55,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 64.0) internal successors, (5312), 83 states have internal predecessors, (5312), 0 states have call successors, (0), 0 states 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 10:45:55,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 94.0) internal successors, (7896), 84 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states 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 10:45:55,959 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 94.0) internal successors, (7896), 84 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states 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 10:45:55,960 INFO L186 Difference]: Start difference. First operand has 156 places, 311 transitions, 2301 flow. Second operand 83 states and 5312 transitions. [2022-07-12 10:45:55,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 2136 transitions, 22837 flow [2022-07-12 10:45:56,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 2136 transitions, 22653 flow, removed 39 selfloop flow, removed 12 redundant places. [2022-07-12 10:45:56,580 INFO L242 Difference]: Finished difference. Result has 257 places, 1520 transitions, 17156 flow [2022-07-12 10:45:56,580 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=17156, PETRI_PLACES=257, PETRI_TRANSITIONS=1520} [2022-07-12 10:45:56,581 INFO L279 CegarLoopForPetriNet]: 82 programPoint places, 175 predicate places. [2022-07-12 10:45:56,581 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 1520 transitions, 17156 flow [2022-07-12 10:45:56,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.75) internal successors, (1458), 24 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states 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 10:45:56,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:56,581 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:56,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:45:56,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-12 10:45:56,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2072494017, now seen corresponding path program 1 times [2022-07-12 10:45:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336437091] [2022-07-12 10:45:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:56,819 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:45:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:45:56,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:45:56,829 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:45:56,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-12 10:45:56,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-12 10:45:56,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-12 10:45:56,830 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:45:56,830 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-12 10:45:56,831 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-12 10:45:56,842 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-12 10:45:56,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 101 transitions, 300 flow [2022-07-12 10:45:56,975 INFO L129 PetriNetUnfolder]: 472/2430 cut-off events. [2022-07-12 10:45:56,975 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-12 10:45:56,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 2430 events. 472/2430 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16314 event pairs, 201 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 1473. Up to 448 conditions per place. [2022-07-12 10:45:56,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 101 transitions, 300 flow [2022-07-12 10:45:56,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 76 transitions, 229 flow [2022-07-12 10:45:56,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:45:56,985 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@224f2c76, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cc3a57a [2022-07-12 10:45:56,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 10:45:56,986 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2022-07-12 10:45:56,986 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:45:56,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:56,986 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] [2022-07-12 10:45:56,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash -196252411, now seen corresponding path program 1 times [2022-07-12 10:45:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:56,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273243920] [2022-07-12 10:45:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:56,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:56,992 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 10:45:56,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:56,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273243920] [2022-07-12 10:45:56,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273243920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:56,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:56,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:45:56,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820574155] [2022-07-12 10:45:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:56,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:45:56,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:45:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:45:56,994 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 101 [2022-07-12 10:45:56,994 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 229 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 10:45:56,994 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:56,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 101 [2022-07-12 10:45:56,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:57,005 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2022-07-12 10:45:57,005 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-07-12 10:45:57,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 154 events. 0/154 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 125 event pairs, 0 based on Foata normal form. 8/154 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-07-12 10:45:57,005 INFO L132 encePairwiseOnDemand]: 100/101 looper letters, 7 selfloop transitions, 0 changer transitions 0/75 dead transitions. [2022-07-12 10:45:57,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 241 flow [2022-07-12 10:45:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:45:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:45:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2022-07-12 10:45:57,006 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8613861386138614 [2022-07-12 10:45:57,006 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2022-07-12 10:45:57,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2022-07-12 10:45:57,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:57,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2022-07-12 10:45:57,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states 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 10:45:57,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 10:45:57,007 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 10:45:57,007 INFO L186 Difference]: Start difference. First operand has 90 places, 76 transitions, 229 flow. Second operand 2 states and 174 transitions. [2022-07-12 10:45:57,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 241 flow [2022-07-12 10:45:57,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 75 transitions, 199 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:57,008 INFO L242 Difference]: Finished difference. Result has 91 places, 75 transitions, 185 flow [2022-07-12 10:45:57,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2022-07-12 10:45:57,009 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2022-07-12 10:45:57,009 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 185 flow [2022-07-12 10:45:57,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 10:45:57,009 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:57,009 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] [2022-07-12 10:45:57,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:45:57,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash -196251450, now seen corresponding path program 1 times [2022-07-12 10:45:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:57,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232687540] [2022-07-12 10:45:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:57,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:57,023 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 10:45:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232687540] [2022-07-12 10:45:57,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232687540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:57,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:57,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19613744] [2022-07-12 10:45:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:57,025 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 101 [2022-07-12 10:45:57,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:57,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:57,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 101 [2022-07-12 10:45:57,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:57,043 INFO L129 PetriNetUnfolder]: 0/151 cut-off events. [2022-07-12 10:45:57,043 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-12 10:45:57,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 151 events. 0/151 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 119 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-07-12 10:45:57,043 INFO L132 encePairwiseOnDemand]: 98/101 looper letters, 16 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-07-12 10:45:57,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 229 flow [2022-07-12 10:45:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-07-12 10:45:57,044 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2022-07-12 10:45:57,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-07-12 10:45:57,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-07-12 10:45:57,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:57,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-07-12 10:45:57,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 10:45:57,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 10:45:57,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 10:45:57,046 INFO L186 Difference]: Start difference. First operand has 91 places, 75 transitions, 185 flow. Second operand 3 states and 247 transitions. [2022-07-12 10:45:57,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 229 flow [2022-07-12 10:45:57,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 79 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:45:57,047 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 197 flow [2022-07-12 10:45:57,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2022-07-12 10:45:57,048 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2022-07-12 10:45:57,048 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 197 flow [2022-07-12 10:45:57,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:45:57,048 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:57,048 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] [2022-07-12 10:45:57,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-12 10:45:57,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1335463192, now seen corresponding path program 1 times [2022-07-12 10:45:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:57,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410192105] [2022-07-12 10:45:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:57,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:45:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:57,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410192105] [2022-07-12 10:45:57,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410192105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:45:57,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:45:57,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:45:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57946259] [2022-07-12 10:45:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:45:57,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:45:57,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:45:57,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:45:57,060 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 101 [2022-07-12 10:45:57,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 10:45:57,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:57,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 101 [2022-07-12 10:45:57,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:57,249 INFO L129 PetriNetUnfolder]: 1383/3169 cut-off events. [2022-07-12 10:45:57,249 INFO L130 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-07-12 10:45:57,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 3169 events. 1383/3169 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22218 event pairs, 924 based on Foata normal form. 7/3050 useless extension candidates. Maximal degree in co-relation 5500. Up to 1878 conditions per place. [2022-07-12 10:45:57,272 INFO L132 encePairwiseOnDemand]: 92/101 looper letters, 22 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2022-07-12 10:45:57,272 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 313 flow [2022-07-12 10:45:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:45:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:45:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2022-07-12 10:45:57,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2022-07-12 10:45:57,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2022-07-12 10:45:57,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2022-07-12 10:45:57,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:45:57,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2022-07-12 10:45:57,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states 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 10:45:57,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 10:45:57,278 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 10:45:57,278 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 197 flow. Second operand 3 states and 247 transitions. [2022-07-12 10:45:57,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 313 flow [2022-07-12 10:45:57,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 89 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:45:57,280 INFO L242 Difference]: Finished difference. Result has 96 places, 83 transitions, 249 flow [2022-07-12 10:45:57,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2022-07-12 10:45:57,281 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2022-07-12 10:45:57,281 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 249 flow [2022-07-12 10:45:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 10:45:57,281 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:45:57,281 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] [2022-07-12 10:45:57,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-12 10:45:57,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:45:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:45:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1177190386, now seen corresponding path program 1 times [2022-07-12 10:45:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:45:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284635152] [2022-07-12 10:45:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:45:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:57,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:45:57,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284635152] [2022-07-12 10:45:57,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284635152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:45:57,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329369027] [2022-07-12 10:45:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:45:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:45:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:45:57,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:45:57,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:45:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:45:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 10:45:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:45:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:57,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:45:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:45:57,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329369027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:45:57,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:45:57,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-12 10:45:57,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820809712] [2022-07-12 10:45:57,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:45:57,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 10:45:57,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:45:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 10:45:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-12 10:45:57,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-07-12 10:45:57,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 249 flow. Second operand has 15 states, 15 states have (on average 64.6) internal successors, (969), 15 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 10:45:57,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:45:57,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-07-12 10:45:57,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:45:59,953 INFO L129 PetriNetUnfolder]: 15174/27505 cut-off events. [2022-07-12 10:45:59,954 INFO L130 PetriNetUnfolder]: For 6431/6431 co-relation queries the response was YES. [2022-07-12 10:46:00,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64554 conditions, 27505 events. 15174/27505 cut-off events. For 6431/6431 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 222978 event pairs, 3397 based on Foata normal form. 130/27635 useless extension candidates. Maximal degree in co-relation 64541. Up to 14077 conditions per place. [2022-07-12 10:46:00,314 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 118 selfloop transitions, 103 changer transitions 0/269 dead transitions. [2022-07-12 10:46:00,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 269 transitions, 1442 flow [2022-07-12 10:46:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 10:46:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-12 10:46:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2134 transitions. [2022-07-12 10:46:00,329 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6815713829447461 [2022-07-12 10:46:00,329 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2134 transitions. [2022-07-12 10:46:00,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2134 transitions. [2022-07-12 10:46:00,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:00,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2134 transitions. [2022-07-12 10:46:00,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 68.83870967741936) internal successors, (2134), 31 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 10:46:00,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 101.0) internal successors, (3232), 32 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 10:46:00,336 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 101.0) internal successors, (3232), 32 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states 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 10:46:00,336 INFO L186 Difference]: Start difference. First operand has 96 places, 83 transitions, 249 flow. Second operand 31 states and 2134 transitions. [2022-07-12 10:46:00,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 269 transitions, 1442 flow [2022-07-12 10:46:00,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 269 transitions, 1396 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:46:00,342 INFO L242 Difference]: Finished difference. Result has 136 places, 175 transitions, 873 flow [2022-07-12 10:46:00,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=873, PETRI_PLACES=136, PETRI_TRANSITIONS=175} [2022-07-12 10:46:00,343 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 46 predicate places. [2022-07-12 10:46:00,343 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 175 transitions, 873 flow [2022-07-12 10:46:00,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.6) internal successors, (969), 15 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 10:46:00,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:00,343 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:46:00,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:46:00,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-12 10:46:00,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:46:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash 722649244, now seen corresponding path program 1 times [2022-07-12 10:46:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297389450] [2022-07-12 10:46:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:00,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:00,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297389450] [2022-07-12 10:46:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297389450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:46:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300926212] [2022-07-12 10:46:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:46:00,601 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:46:00,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:46:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:00,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:46:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:46:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:00,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:46:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:46:00,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300926212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:46:00,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:46:00,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-07-12 10:46:00,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59089295] [2022-07-12 10:46:00,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:46:00,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:46:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:00,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:46:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:46:00,792 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-07-12 10:46:00,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 175 transitions, 873 flow. Second operand has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states 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 10:46:00,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:00,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-07-12 10:46:00,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:46:07,963 INFO L129 PetriNetUnfolder]: 33304/58966 cut-off events. [2022-07-12 10:46:07,964 INFO L130 PetriNetUnfolder]: For 107223/107230 co-relation queries the response was YES. [2022-07-12 10:46:08,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211612 conditions, 58966 events. 33304/58966 cut-off events. For 107223/107230 co-relation queries the response was YES. Maximal size of possible extension queue 1957. Compared 524977 event pairs, 3741 based on Foata normal form. 301/59267 useless extension candidates. Maximal degree in co-relation 211588. Up to 29419 conditions per place. [2022-07-12 10:46:09,252 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 233 selfloop transitions, 351 changer transitions 0/648 dead transitions. [2022-07-12 10:46:09,252 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 648 transitions, 4914 flow [2022-07-12 10:46:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-12 10:46:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-07-12 10:46:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3982 transitions. [2022-07-12 10:46:09,256 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.668232924987414 [2022-07-12 10:46:09,256 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3982 transitions. [2022-07-12 10:46:09,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3982 transitions. [2022-07-12 10:46:09,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:46:09,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3982 transitions. [2022-07-12 10:46:09,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 67.49152542372882) internal successors, (3982), 59 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states 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 10:46:09,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 101.0) internal successors, (6060), 60 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states 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 10:46:09,266 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 101.0) internal successors, (6060), 60 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states 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 10:46:09,266 INFO L186 Difference]: Start difference. First operand has 136 places, 175 transitions, 873 flow. Second operand 59 states and 3982 transitions. [2022-07-12 10:46:09,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 648 transitions, 4914 flow [2022-07-12 10:46:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 648 transitions, 4747 flow, removed 65 selfloop flow, removed 6 redundant places. [2022-07-12 10:46:09,688 INFO L242 Difference]: Finished difference. Result has 209 places, 474 transitions, 3790 flow [2022-07-12 10:46:09,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=3790, PETRI_PLACES=209, PETRI_TRANSITIONS=474} [2022-07-12 10:46:09,689 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 119 predicate places. [2022-07-12 10:46:09,689 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 474 transitions, 3790 flow [2022-07-12 10:46:09,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states 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 10:46:09,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:46:09,689 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:46:09,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:46:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:09,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:46:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:46:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash -240865470, now seen corresponding path program 1 times [2022-07-12 10:46:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:46:09,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381423707] [2022-07-12 10:46:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:46:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:46:09,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:46:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381423707] [2022-07-12 10:46:09,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381423707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:46:09,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440991246] [2022-07-12 10:46:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:46:09,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:46:09,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:46:09,954 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:46:09,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:46:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:46:10,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 10:46:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:46:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:46:10,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:46:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:46:10,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440991246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:46:10,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:46:10,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-12 10:46:10,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647679083] [2022-07-12 10:46:10,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:46:10,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 10:46:10,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:46:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 10:46:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-07-12 10:46:10,219 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2022-07-12 10:46:10,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 474 transitions, 3790 flow. Second operand has 24 states, 24 states have (on average 65.0) internal successors, (1560), 24 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:46:10,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:46:10,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2022-07-12 10:46:10,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand