./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.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 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:56:54,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:56:54,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:56:54,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:56:54,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:56:54,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:56:54,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:56:54,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:56:54,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:56:54,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:56:54,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:56:54,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:56:54,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:56:54,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:56:54,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:56:54,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:56:54,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:56:54,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:56:54,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:56:54,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:56:54,270 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:56:54,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:56:54,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:56:54,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:56:54,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:56:54,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:56:54,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:56:54,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:56:54,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:56:54,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:56:54,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:56:54,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:56:54,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:56:54,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:56:54,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:56:54,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:56:54,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:56:54,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:56:54,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:56:54,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:56:54,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:56:54,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:56:54,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:56:54,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:56:54,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:56:54,324 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:56:54,324 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:56:54,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:56:54,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:56:54,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:56:54,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:56:54,326 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:56:54,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:56:54,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:56:54,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:56:54,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:56:54,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:56:54,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:56:54,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:56:54,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:56:54,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:56:54,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:56:54,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:56:54,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:56:54,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:56:54,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:56:54,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:56:54,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:54,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:56:54,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:56:54,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:56:54,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:56:54,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:56:54,333 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:56:54,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:56:54,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:56:54,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b90ecb07ae966182b79ce4444e238e18068c02297f514a326dfeeed6dbb5499 [2022-07-13 21:56:54,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:56:54,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:56:54,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:56:54,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:56:54,593 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:56:54,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-07-13 21:56:54,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0738f11ed/e9dba5bdcebc44fba044178f45154050/FLAGe0763c189 [2022-07-13 21:56:55,098 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:56:55,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2022-07-13 21:56:55,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0738f11ed/e9dba5bdcebc44fba044178f45154050/FLAGe0763c189 [2022-07-13 21:56:55,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0738f11ed/e9dba5bdcebc44fba044178f45154050 [2022-07-13 21:56:55,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:56:55,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:56:55,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:55,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:56:55,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:56:55,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:55" (1/1) ... [2022-07-13 21:56:55,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456b5b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:55, skipping insertion in model container [2022-07-13 21:56:55,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:56:55" (1/1) ... [2022-07-13 21:56:55,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:56:55,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:56:55,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-07-13 21:56:55,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:55,888 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:56:55,932 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i[41323,41336] [2022-07-13 21:56:55,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:56:56,010 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:56:56,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56 WrapperNode [2022-07-13 21:56:56,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:56:56,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:56,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:56:56,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:56:56,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,073 INFO L137 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2022-07-13 21:56:56,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:56:56,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:56:56,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:56:56,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:56:56,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:56:56,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:56:56,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:56:56,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:56:56,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (1/1) ... [2022-07-13 21:56:56,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:56:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:56,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 21:56:56,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 21:56:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 21:56:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 21:56:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 21:56:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 21:56:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-13 21:56:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:56:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-07-13 21:56:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-07-13 21:56:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:56:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:56:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:56:56,193 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 21:56:56,309 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:56:56,323 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:56:56,538 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:56:56,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:56:56,546 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-13 21:56:56,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:56 BoogieIcfgContainer [2022-07-13 21:56:56,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:56:56,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:56:56,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:56:56,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:56:56,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:56:55" (1/3) ... [2022-07-13 21:56:56,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127421e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:56, skipping insertion in model container [2022-07-13 21:56:56,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:56:56" (2/3) ... [2022-07-13 21:56:56,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127421e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:56:56, skipping insertion in model container [2022-07-13 21:56:56,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:56:56" (3/3) ... [2022-07-13 21:56:56,555 INFO L111 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2022-07-13 21:56:56,560 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 21:56:56,569 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:56:56,570 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 21:56:56,570 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 21:56:56,615 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-13 21:56:56,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 119 places, 128 transitions, 264 flow [2022-07-13 21:56:56,694 INFO L129 PetriNetUnfolder]: 17/168 cut-off events. [2022-07-13 21:56:56,694 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-07-13 21:56:56,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 168 events. 17/168 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 398 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 84. Up to 4 conditions per place. [2022-07-13 21:56:56,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 128 transitions, 264 flow [2022-07-13 21:56:56,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 251 flow [2022-07-13 21:56:56,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:56,718 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1359af4c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e775743 [2022-07-13 21:56:56,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:56,735 INFO L129 PetriNetUnfolder]: 4/95 cut-off events. [2022-07-13 21:56:56,736 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:56,736 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:56,737 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:56,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 773467911, now seen corresponding path program 1 times [2022-07-13 21:56:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:56,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263022443] [2022-07-13 21:56:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:56,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:57,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:57,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263022443] [2022-07-13 21:56:57,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263022443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:57,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:57,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:57,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171037784] [2022-07-13 21:56:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:57,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:57,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:57,072 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 128 [2022-07-13 21:56:57,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:57,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 128 [2022-07-13 21:56:57,081 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:57,161 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2022-07-13 21:56:57,161 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-13 21:56:57,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 115 events. 0/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 16/128 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-13 21:56:57,164 INFO L132 encePairwiseOnDemand]: 114/128 looper letters, 8 selfloop transitions, 2 changer transitions 15/113 dead transitions. [2022-07-13 21:56:57,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 113 transitions, 251 flow [2022-07-13 21:56:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 350 transitions. [2022-07-13 21:56:57,186 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9114583333333334 [2022-07-13 21:56:57,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 350 transitions. [2022-07-13 21:56:57,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 350 transitions. [2022-07-13 21:56:57,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:57,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 350 transitions. [2022-07-13 21:56:57,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,211 INFO L186 Difference]: Start difference. First operand has 115 places, 123 transitions, 251 flow. Second operand 3 states and 350 transitions. [2022-07-13 21:56:57,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 113 transitions, 251 flow [2022-07-13 21:56:57,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 251 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:57,220 INFO L242 Difference]: Finished difference. Result has 117 places, 96 transitions, 205 flow [2022-07-13 21:56:57,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2022-07-13 21:56:57,225 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 2 predicate places. [2022-07-13 21:56:57,225 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 205 flow [2022-07-13 21:56:57,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,226 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:57,226 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:57,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:56:57,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 349975661, now seen corresponding path program 1 times [2022-07-13 21:56:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:57,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258068667] [2022-07-13 21:56:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:57,291 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:57,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:57,373 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:57,378 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:57,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:57,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:56:57,383 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:56:57,386 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:57,386 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-13 21:56:57,420 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 21:56:57,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 169 transitions, 356 flow [2022-07-13 21:56:57,469 INFO L129 PetriNetUnfolder]: 31/274 cut-off events. [2022-07-13 21:56:57,470 INFO L130 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-07-13 21:56:57,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 274 events. 31/274 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 848 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2022-07-13 21:56:57,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 169 transitions, 356 flow [2022-07-13 21:56:57,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 169 transitions, 356 flow [2022-07-13 21:56:57,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:57,483 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@1359af4c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e775743 [2022-07-13 21:56:57,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:57,504 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-13 21:56:57,504 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:57,504 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:57,505 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:57,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1770099641, now seen corresponding path program 1 times [2022-07-13 21:56:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:57,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115924223] [2022-07-13 21:56:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:57,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:57,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115924223] [2022-07-13 21:56:57,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115924223] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:57,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:57,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755895961] [2022-07-13 21:56:57,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:57,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 169 [2022-07-13 21:56:57,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 169 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:57,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 169 [2022-07-13 21:56:57,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:57,685 INFO L129 PetriNetUnfolder]: 2/222 cut-off events. [2022-07-13 21:56:57,686 INFO L130 PetriNetUnfolder]: For 32/78 co-relation queries the response was YES. [2022-07-13 21:56:57,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 222 events. 2/222 cut-off events. For 32/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 496 event pairs, 0 based on Foata normal form. 50/264 useless extension candidates. Maximal degree in co-relation 136. Up to 16 conditions per place. [2022-07-13 21:56:57,688 INFO L132 encePairwiseOnDemand]: 149/169 looper letters, 11 selfloop transitions, 2 changer transitions 21/155 dead transitions. [2022-07-13 21:56:57,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 155 transitions, 358 flow [2022-07-13 21:56:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2022-07-13 21:56:57,691 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072978303747534 [2022-07-13 21:56:57,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2022-07-13 21:56:57,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2022-07-13 21:56:57,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:57,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2022-07-13 21:56:57,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,697 INFO L186 Difference]: Start difference. First operand has 155 places, 169 transitions, 356 flow. Second operand 3 states and 460 transitions. [2022-07-13 21:56:57,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 155 transitions, 358 flow [2022-07-13 21:56:57,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 155 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:57,705 INFO L242 Difference]: Finished difference. Result has 157 places, 131 transitions, 284 flow [2022-07-13 21:56:57,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2022-07-13 21:56:57,706 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 2 predicate places. [2022-07-13 21:56:57,706 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 284 flow [2022-07-13 21:56:57,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,707 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:57,707 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:57,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:56:57,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:57,709 INFO L85 PathProgramCache]: Analyzing trace with hash -720853353, now seen corresponding path program 1 times [2022-07-13 21:56:57,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:57,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485199886] [2022-07-13 21:56:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:57,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:57,733 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:57,756 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:57,757 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:57,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:57,757 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:56:57,758 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1] [2022-07-13 21:56:57,759 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:57,759 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-13 21:56:57,790 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 21:56:57,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 191 places, 210 transitions, 450 flow [2022-07-13 21:56:57,862 INFO L129 PetriNetUnfolder]: 50/413 cut-off events. [2022-07-13 21:56:57,862 INFO L130 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-07-13 21:56:57,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 413 events. 50/413 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1481 event pairs, 1 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2022-07-13 21:56:57,866 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 210 transitions, 450 flow [2022-07-13 21:56:57,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 210 transitions, 450 flow [2022-07-13 21:56:57,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:57,874 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@1359af4c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e775743 [2022-07-13 21:56:57,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:57,881 INFO L129 PetriNetUnfolder]: 4/94 cut-off events. [2022-07-13 21:56:57,882 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:57,882 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:57,882 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:57,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1931036359, now seen corresponding path program 1 times [2022-07-13 21:56:57,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:57,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910778341] [2022-07-13 21:56:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:57,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:57,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:57,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910778341] [2022-07-13 21:56:57,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910778341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:57,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:57,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642174396] [2022-07-13 21:56:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:57,963 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 210 [2022-07-13 21:56:57,964 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 210 transitions, 450 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:57,964 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:57,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 210 [2022-07-13 21:56:57,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:58,059 INFO L129 PetriNetUnfolder]: 7/346 cut-off events. [2022-07-13 21:56:58,060 INFO L130 PetriNetUnfolder]: For 43/82 co-relation queries the response was YES. [2022-07-13 21:56:58,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 346 events. 7/346 cut-off events. For 43/82 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1079 event pairs, 1 based on Foata normal form. 139/471 useless extension candidates. Maximal degree in co-relation 250. Up to 30 conditions per place. [2022-07-13 21:56:58,064 INFO L132 encePairwiseOnDemand]: 184/210 looper letters, 12 selfloop transitions, 2 changer transitions 22/190 dead transitions. [2022-07-13 21:56:58,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 444 flow [2022-07-13 21:56:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-07-13 21:56:58,069 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-13 21:56:58,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-07-13 21:56:58,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-07-13 21:56:58,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:58,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-07-13 21:56:58,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,074 INFO L186 Difference]: Start difference. First operand has 191 places, 210 transitions, 450 flow. Second operand 3 states and 567 transitions. [2022-07-13 21:56:58,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 444 flow [2022-07-13 21:56:58,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 190 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:58,085 INFO L242 Difference]: Finished difference. Result has 193 places, 165 transitions, 361 flow [2022-07-13 21:56:58,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=193, PETRI_TRANSITIONS=165} [2022-07-13 21:56:58,087 INFO L279 CegarLoopForPetriNet]: 191 programPoint places, 2 predicate places. [2022-07-13 21:56:58,087 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 165 transitions, 361 flow [2022-07-13 21:56:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,088 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:58,088 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:58,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:56:58,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:58,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1053079369, now seen corresponding path program 1 times [2022-07-13 21:56:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:58,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361899303] [2022-07-13 21:56:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:58,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361899303] [2022-07-13 21:56:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361899303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288371911] [2022-07-13 21:56:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:58,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:58,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:58,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:56:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:58,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288371911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:58,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:58,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498633169] [2022-07-13 21:56:58,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:58,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 210 [2022-07-13 21:56:58,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 165 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:58,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 210 [2022-07-13 21:56:58,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:58,589 INFO L129 PetriNetUnfolder]: 0/186 cut-off events. [2022-07-13 21:56:58,589 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-13 21:56:58,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 186 events. 0/186 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-07-13 21:56:58,590 INFO L132 encePairwiseOnDemand]: 204/210 looper letters, 13 selfloop transitions, 9 changer transitions 0/175 dead transitions. [2022-07-13 21:56:58,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 175 transitions, 427 flow [2022-07-13 21:56:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1572 transitions. [2022-07-13 21:56:58,594 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-07-13 21:56:58,594 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1572 transitions. [2022-07-13 21:56:58,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1572 transitions. [2022-07-13 21:56:58,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:58,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1572 transitions. [2022-07-13 21:56:58,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.66666666666666) internal successors, (1572), 9 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,602 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 210.0) internal successors, (2100), 10 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,602 INFO L186 Difference]: Start difference. First operand has 193 places, 165 transitions, 361 flow. Second operand 9 states and 1572 transitions. [2022-07-13 21:56:58,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 175 transitions, 427 flow [2022-07-13 21:56:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 175 transitions, 419 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:58,608 INFO L242 Difference]: Finished difference. Result has 184 places, 171 transitions, 403 flow [2022-07-13 21:56:58,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=184, PETRI_TRANSITIONS=171} [2022-07-13 21:56:58,611 INFO L279 CegarLoopForPetriNet]: 191 programPoint places, -7 predicate places. [2022-07-13 21:56:58,611 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 171 transitions, 403 flow [2022-07-13 21:56:58,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 174.3) internal successors, (1743), 10 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:58,612 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:58,612 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:58,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:58,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 21:56:58,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -707148592, now seen corresponding path program 1 times [2022-07-13 21:56:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:58,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75286275] [2022-07-13 21:56:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:58,864 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:56:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:58,909 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:56:58,909 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:56:58,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:56:58,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:56:58,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:56:58,910 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-13 21:56:58,911 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:56:58,911 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-13 21:56:58,948 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 21:56:58,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 227 places, 251 transitions, 546 flow [2022-07-13 21:56:59,037 INFO L129 PetriNetUnfolder]: 81/620 cut-off events. [2022-07-13 21:56:59,037 INFO L130 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-07-13 21:56:59,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 620 events. 81/620 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2544 event pairs, 6 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 433. Up to 32 conditions per place. [2022-07-13 21:56:59,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 251 transitions, 546 flow [2022-07-13 21:56:59,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 251 transitions, 546 flow [2022-07-13 21:56:59,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:56:59,062 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@1359af4c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e775743 [2022-07-13 21:56:59,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:56:59,069 INFO L129 PetriNetUnfolder]: 4/96 cut-off events. [2022-07-13 21:56:59,069 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:56:59,070 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:59,070 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:59,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1779389510, now seen corresponding path program 1 times [2022-07-13 21:56:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:59,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411047992] [2022-07-13 21:56:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411047992] [2022-07-13 21:56:59,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411047992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:59,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:59,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:56:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268551473] [2022-07-13 21:56:59,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:59,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:56:59,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:56:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:56:59,115 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 251 [2022-07-13 21:56:59,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 251 transitions, 546 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:59,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 251 [2022-07-13 21:56:59,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:59,226 INFO L129 PetriNetUnfolder]: 21/555 cut-off events. [2022-07-13 21:56:59,226 INFO L130 PetriNetUnfolder]: For 126/150 co-relation queries the response was YES. [2022-07-13 21:56:59,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 555 events. 21/555 cut-off events. For 126/150 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2261 event pairs, 6 based on Foata normal form. 240/769 useless extension candidates. Maximal degree in co-relation 402. Up to 37 conditions per place. [2022-07-13 21:56:59,232 INFO L132 encePairwiseOnDemand]: 222/251 looper letters, 4 selfloop transitions, 0 changer transitions 23/221 dead transitions. [2022-07-13 21:56:59,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 221 transitions, 502 flow [2022-07-13 21:56:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:56:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:56:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-07-13 21:56:59,234 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9223107569721115 [2022-07-13 21:56:59,234 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-07-13 21:56:59,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-07-13 21:56:59,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:59,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-07-13 21:56:59,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,238 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,238 INFO L186 Difference]: Start difference. First operand has 227 places, 251 transitions, 546 flow. Second operand 2 states and 463 transitions. [2022-07-13 21:56:59,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 221 transitions, 502 flow [2022-07-13 21:56:59,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 221 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:59,243 INFO L242 Difference]: Finished difference. Result has 227 places, 198 transitions, 428 flow [2022-07-13 21:56:59,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=227, PETRI_TRANSITIONS=198} [2022-07-13 21:56:59,245 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, 0 predicate places. [2022-07-13 21:56:59,245 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 198 transitions, 428 flow [2022-07-13 21:56:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,245 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:59,246 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:59,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:56:59,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1008025977, now seen corresponding path program 1 times [2022-07-13 21:56:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:59,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589678049] [2022-07-13 21:56:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:59,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589678049] [2022-07-13 21:56:59,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589678049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:56:59,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:56:59,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:56:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671931437] [2022-07-13 21:56:59,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:56:59,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:56:59,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:56:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:56:59,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 251 [2022-07-13 21:56:59,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 198 transitions, 428 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:59,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 251 [2022-07-13 21:56:59,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:59,329 INFO L129 PetriNetUnfolder]: 0/274 cut-off events. [2022-07-13 21:56:59,329 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-07-13 21:56:59,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 274 events. 0/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 764 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-07-13 21:56:59,330 INFO L132 encePairwiseOnDemand]: 248/251 looper letters, 13 selfloop transitions, 2 changer transitions 0/202 dead transitions. [2022-07-13 21:56:59,331 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 202 transitions, 466 flow [2022-07-13 21:56:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:56:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:56:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2022-07-13 21:56:59,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8419654714475432 [2022-07-13 21:56:59,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2022-07-13 21:56:59,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2022-07-13 21:56:59,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:59,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2022-07-13 21:56:59,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,336 INFO L186 Difference]: Start difference. First operand has 227 places, 198 transitions, 428 flow. Second operand 3 states and 634 transitions. [2022-07-13 21:56:59,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 202 transitions, 466 flow [2022-07-13 21:56:59,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 202 transitions, 454 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-07-13 21:56:59,340 INFO L242 Difference]: Finished difference. Result has 211 places, 199 transitions, 428 flow [2022-07-13 21:56:59,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=428, PETRI_PLACES=211, PETRI_TRANSITIONS=199} [2022-07-13 21:56:59,341 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, -16 predicate places. [2022-07-13 21:56:59,342 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 199 transitions, 428 flow [2022-07-13 21:56:59,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:59,342 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:59,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:56:59,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1183444336, now seen corresponding path program 1 times [2022-07-13 21:56:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:59,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485870754] [2022-07-13 21:56:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:56:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485870754] [2022-07-13 21:56:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485870754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:56:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099613294] [2022-07-13 21:56:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:56:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:56:59,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:56:59,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:56:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:56:59,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:56:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:56:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:56:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:56:59,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099613294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:56:59,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:56:59,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:56:59,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161992048] [2022-07-13 21:56:59,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:56:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:56:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:56:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:56:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:56:59,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 251 [2022-07-13 21:56:59,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 199 transitions, 428 flow. Second operand has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:56:59,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 251 [2022-07-13 21:56:59,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:56:59,729 INFO L129 PetriNetUnfolder]: 0/244 cut-off events. [2022-07-13 21:56:59,729 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-13 21:56:59,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 244 events. 0/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 572 event pairs, 0 based on Foata normal form. 2/246 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-07-13 21:56:59,730 INFO L132 encePairwiseOnDemand]: 245/251 looper letters, 14 selfloop transitions, 9 changer transitions 0/209 dead transitions. [2022-07-13 21:56:59,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 209 transitions, 496 flow [2022-07-13 21:56:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:56:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:56:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1870 transitions. [2022-07-13 21:56:59,735 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8277999114652501 [2022-07-13 21:56:59,735 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1870 transitions. [2022-07-13 21:56:59,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1870 transitions. [2022-07-13 21:56:59,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:56:59,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1870 transitions. [2022-07-13 21:56:59,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.77777777777777) internal successors, (1870), 9 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,745 INFO L186 Difference]: Start difference. First operand has 211 places, 199 transitions, 428 flow. Second operand 9 states and 1870 transitions. [2022-07-13 21:56:59,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 209 transitions, 496 flow [2022-07-13 21:56:59,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 209 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:56:59,749 INFO L242 Difference]: Finished difference. Result has 221 places, 205 transitions, 476 flow [2022-07-13 21:56:59,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=476, PETRI_PLACES=221, PETRI_TRANSITIONS=205} [2022-07-13 21:56:59,750 INFO L279 CegarLoopForPetriNet]: 227 programPoint places, -6 predicate places. [2022-07-13 21:56:59,751 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 205 transitions, 476 flow [2022-07-13 21:56:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.3) internal successors, (2073), 10 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:56:59,752 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:56:59,752 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:56:59,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:56:59,975 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,SelfDestructingSolverStorable9 [2022-07-13 21:56:59,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:56:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:56:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash 134031480, now seen corresponding path program 1 times [2022-07-13 21:56:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:56:59,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622666490] [2022-07-13 21:56:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:56:59,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:56:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:56:59,995 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 21:57:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 21:57:00,015 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 21:57:00,015 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 21:57:00,016 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-13 21:57:00,016 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-13 21:57:00,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:57:00,016 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-13 21:57:00,017 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-13 21:57:00,017 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-13 21:57:00,039 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-13 21:57:00,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 263 places, 292 transitions, 644 flow [2022-07-13 21:57:00,187 INFO L129 PetriNetUnfolder]: 140/967 cut-off events. [2022-07-13 21:57:00,187 INFO L130 PetriNetUnfolder]: For 110/115 co-relation queries the response was YES. [2022-07-13 21:57:00,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 967 events. 140/967 cut-off events. For 110/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4579 event pairs, 23 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 665. Up to 80 conditions per place. [2022-07-13 21:57:00,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 263 places, 292 transitions, 644 flow [2022-07-13 21:57:00,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 292 transitions, 644 flow [2022-07-13 21:57:00,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:57:00,217 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@1359af4c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6e775743 [2022-07-13 21:57:00,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:57:00,223 INFO L129 PetriNetUnfolder]: 4/97 cut-off events. [2022-07-13 21:57:00,223 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-13 21:57:00,223 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:00,223 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:00,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 790063430, now seen corresponding path program 1 times [2022-07-13 21:57:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:00,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111583740] [2022-07-13 21:57:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:00,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111583740] [2022-07-13 21:57:00,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111583740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:00,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:00,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 21:57:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754516058] [2022-07-13 21:57:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:00,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 21:57:00,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 21:57:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 21:57:00,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 292 [2022-07-13 21:57:00,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 292 transitions, 644 flow. Second operand has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:00,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 292 [2022-07-13 21:57:00,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:00,421 INFO L129 PetriNetUnfolder]: 54/875 cut-off events. [2022-07-13 21:57:00,421 INFO L130 PetriNetUnfolder]: For 287/308 co-relation queries the response was YES. [2022-07-13 21:57:00,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 875 events. 54/875 cut-off events. For 287/308 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4171 event pairs, 23 based on Foata normal form. 563/1394 useless extension candidates. Maximal degree in co-relation 636. Up to 86 conditions per place. [2022-07-13 21:57:00,434 INFO L132 encePairwiseOnDemand]: 257/292 looper letters, 5 selfloop transitions, 0 changer transitions 24/256 dead transitions. [2022-07-13 21:57:00,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 256 transitions, 592 flow [2022-07-13 21:57:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 21:57:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 21:57:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 537 transitions. [2022-07-13 21:57:00,437 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9195205479452054 [2022-07-13 21:57:00,437 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 537 transitions. [2022-07-13 21:57:00,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 537 transitions. [2022-07-13 21:57:00,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:00,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 537 transitions. [2022-07-13 21:57:00,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 268.5) internal successors, (537), 2 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,440 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,440 INFO L186 Difference]: Start difference. First operand has 263 places, 292 transitions, 644 flow. Second operand 2 states and 537 transitions. [2022-07-13 21:57:00,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 256 transitions, 592 flow [2022-07-13 21:57:00,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 256 transitions, 592 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:00,445 INFO L242 Difference]: Finished difference. Result has 263 places, 232 transitions, 509 flow [2022-07-13 21:57:00,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=509, PETRI_PLACES=263, PETRI_TRANSITIONS=232} [2022-07-13 21:57:00,446 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, 0 predicate places. [2022-07-13 21:57:00,446 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 232 transitions, 509 flow [2022-07-13 21:57:00,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 246.5) internal successors, (493), 2 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,447 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:00,447 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:00,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:57:00,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1997352057, now seen corresponding path program 1 times [2022-07-13 21:57:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:00,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354859532] [2022-07-13 21:57:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354859532] [2022-07-13 21:57:00,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354859532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:00,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:00,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 21:57:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380589767] [2022-07-13 21:57:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:00,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:57:00,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:57:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 21:57:00,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 292 [2022-07-13 21:57:00,473 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 232 transitions, 509 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,473 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:00,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 292 [2022-07-13 21:57:00,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:00,550 INFO L129 PetriNetUnfolder]: 0/332 cut-off events. [2022-07-13 21:57:00,550 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 21:57:00,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 332 events. 0/332 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1017 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-07-13 21:57:00,551 INFO L132 encePairwiseOnDemand]: 289/292 looper letters, 14 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-07-13 21:57:00,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 236 transitions, 549 flow [2022-07-13 21:57:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:57:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-13 21:57:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-07-13 21:57:00,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8378995433789954 [2022-07-13 21:57:00,554 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-07-13 21:57:00,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-07-13 21:57:00,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:00,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-07-13 21:57:00,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,558 INFO L186 Difference]: Start difference. First operand has 263 places, 232 transitions, 509 flow. Second operand 3 states and 734 transitions. [2022-07-13 21:57:00,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 236 transitions, 549 flow [2022-07-13 21:57:00,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 236 transitions, 529 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-07-13 21:57:00,563 INFO L242 Difference]: Finished difference. Result has 247 places, 233 transitions, 501 flow [2022-07-13 21:57:00,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=501, PETRI_PLACES=247, PETRI_TRANSITIONS=233} [2022-07-13 21:57:00,564 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, -16 predicate places. [2022-07-13 21:57:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 233 transitions, 501 flow [2022-07-13 21:57:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,565 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:00,565 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:00,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:57:00,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash 446612663, now seen corresponding path program 1 times [2022-07-13 21:57:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585738644] [2022-07-13 21:57:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585738644] [2022-07-13 21:57:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585738644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:57:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633044769] [2022-07-13 21:57:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:57:00,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:57:00,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:57:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:00,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 21:57:00,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:57:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:57:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:57:00,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633044769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:57:00,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:57:00,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-13 21:57:00,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281358649] [2022-07-13 21:57:00,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:57:00,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:57:00,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:57:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:57:00,784 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 292 [2022-07-13 21:57:00,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 233 transitions, 501 flow. Second operand has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:00,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 292 [2022-07-13 21:57:00,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:00,891 INFO L129 PetriNetUnfolder]: 0/302 cut-off events. [2022-07-13 21:57:00,891 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-13 21:57:00,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 302 events. 0/302 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 829 event pairs, 0 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-07-13 21:57:00,893 INFO L132 encePairwiseOnDemand]: 286/292 looper letters, 15 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2022-07-13 21:57:00,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 243 transitions, 571 flow [2022-07-13 21:57:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:57:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 21:57:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2168 transitions. [2022-07-13 21:57:00,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8249619482496194 [2022-07-13 21:57:00,898 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2168 transitions. [2022-07-13 21:57:00,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2168 transitions. [2022-07-13 21:57:00,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 21:57:00,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2168 transitions. [2022-07-13 21:57:00,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.88888888888889) internal successors, (2168), 9 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,909 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 292.0) internal successors, (2920), 10 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,909 INFO L186 Difference]: Start difference. First operand has 247 places, 233 transitions, 501 flow. Second operand 9 states and 2168 transitions. [2022-07-13 21:57:00,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 243 transitions, 571 flow [2022-07-13 21:57:00,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 243 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-13 21:57:00,914 INFO L242 Difference]: Finished difference. Result has 257 places, 239 transitions, 549 flow [2022-07-13 21:57:00,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=257, PETRI_TRANSITIONS=239} [2022-07-13 21:57:00,915 INFO L279 CegarLoopForPetriNet]: 263 programPoint places, -6 predicate places. [2022-07-13 21:57:00,915 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 239 transitions, 549 flow [2022-07-13 21:57:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 240.3) internal successors, (2403), 10 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:00,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 21:57:00,917 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:57:00,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:57:01,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:57:01,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 21:57:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:57:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1580915110, now seen corresponding path program 1 times [2022-07-13 21:57:01,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:57:01,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640867339] [2022-07-13 21:57:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:57:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:57:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:57:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:57:01,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:57:01,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640867339] [2022-07-13 21:57:01,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640867339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:57:01,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:57:01,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:57:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123999106] [2022-07-13 21:57:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:57:01,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:57:01,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:57:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:57:01,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:57:01,217 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 292 [2022-07-13 21:57:01,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 239 transitions, 549 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 21:57:01,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 21:57:01,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 292 [2022-07-13 21:57:01,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 21:57:43,033 INFO L129 PetriNetUnfolder]: 110509/274479 cut-off events. [2022-07-13 21:57:43,033 INFO L130 PetriNetUnfolder]: For 2454/2454 co-relation queries the response was YES.